Retscher, Günther

Ao.Univ.Prof. Privatdoz. Dipl.-Ing. Dr.techn.


Research Division:
Engineering Geodesy
Position:
Associate Professor
Research Area:
Positioning and Navigation with GNSS, Location Based Services (LBS), Indoor and Pedestrian Navigation, Applications of Multi-sensor Systems, Smartphone Positioning, Sensor Fusion
Address:
Wiedner Hauptstraße 8 / E120-05 (DA02P10)
Phone #:
+43 1 58801 12847
Email:
Guenther.Retscher (at) geo.tuwien.ac.at

Biography

Dr. Guenther Retscher holds an undergraduate degree in Surveying, a PhD and a Habilitation (venia docendi) in Applied Geodesy from TU Wien with the focus on Mobile Multi-sensor Systems for Personal Navigation and Location-based Services. Guenther’s research interests include positioning and navigation with GNSS, location-based services, indoor and pedestrian navigation, applications of multi-sensor systems, smartphone positioning and sensor fusion. Guenther is currently the coordinator of IAG Special Study Group SG 4.1.1 on Positioning Using Smartphones and the co-chair of the joint IAG Working Group WG 4.1.1 and FIG WG 5.5 on Multi-Sensor Systems.

Publications

Books and Book Editorships

  1. G. Retscher:
    "Mobile Multi-sensor systems for Personal Navigation and Location-based Services";
    in series "Geowissenschaftliche Mitteilungen, Heft 81", series editor: H. Kahmen; issued by: Institut für Geodäsie und Geophysik, Forschungsgruppe Ingenieurgeodäsie; Eigenverlag, Wien, 2009, ISSN: 1811-8380, 116 pages. BibTeX,

  2. H. Kahmen, W. Niemeier, G. Retscher (ed.):
    "Geodesy for Geotechnical and Structural Engineering II";
    TU Vienna, Institute of Geodesy and Geophysics, 2002, ISBN: 3-9501492-1-x; 543 pages. BibTeX,

  3. G. Retscher:
    "Diskussion der Leistungsmerkmale von Systemen zur Positionsbestimmung mit Mobiltelefonen als Basis für Location Based Services (LBS)";
    in series "TeleKartographie und Location Based Services", series editor: F. Kelnhofer, M. Lechthaler, K. Brunner; issued by: Institut für Kartographie und Geo-Medientechnik; Geowissenschaftliche Mitteilungen, Band 58, Wien, 2002, ISSN: 1811-8380, 41 pages. BibTeX, More information

Publications in Scientific Journals

  1. A. Masiero, C. Toth, J. Gabela, G. Retscher, A. Kealy, H. Perakis, V. Gikas, D. Grejner-Brzezinska:
    "Experimental Assessment of UWB and Vision-Based Car Cooperative Positioning System";
    Remote Sensing (invited), 13 (2021), 4858; 35 pages. BibTeX, More information

  2. G. Retscher, A. Leb:
    "Development of a Smartphone-based University Library Navigation and Information Service Employing Wi-Fi Location Fingerprinting";
    Sensors (invited), 21 (2021), 21; 37 pages. BibTeX, More information

  3. T. Weigert, G. Retscher:
    "Untersuchung eines Smartphone mit Zweifrequenz-GNSS-Empfänger in verschiedenen Anwendungsszenarien im Vermessungswesen";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), begutachteter Beitrag (invited), 109 (2021), 2; 55 - 70. BibTeX, More information

  4. A. Leb, G. Retscher:
    "Studie für ein campusweites Positionierungs- und Navigationssystem an der TU Wien basierend auf WLAN";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI) (invited), 108 (2020), 4; 157 - 172. BibTeX, More information

  5. G. Retscher:
    "Fundamental Concepts and Evolution of Wi-Fi User Localization: An Overview Based on Different Case Studies";
    Sensors (invited), 2020 (2020), 20; 36 pages. BibTeX, More information

  6. G. Retscher, A. Bekenova:
    "Urban Wi-Fi Fingerprinting Along a Public Transport Route";
    Journal of Applied Geodesy (invited), 14 (2020), 4; 379 - 392. BibTeX, More information

  7. G. Retscher, A. Kealy, J. Gabela, Y. Li, S. Goel, C. Toth, A. Masiero, W. Błaszczak-Bąk, V. Gikas, H. Perakis, Z. Koppanyi, D. Grejner-Brzezinska:
    "A Benchmarking Measurement Campaign in GNSS-denied/challenged Indoor/Outdoor and Transitional Environments";
    Journal of Applied Geodesy (invited), 14 (2020), 2; 215 - 229. BibTeX, More information

  8. J. Gabela, G. Retscher, S. Goel, H. Perakis, A. Masiero, C. Toth, V. Gikas, A. Kealy, Z. Koppanyi, W. Błaszczak-Bąk, Y. Li, D. Grejner-Brzezinska:
    "Experimental Evaluation of a UWB-Based Cooperative Positioning System for Pedestrians in GNSS-Denied Environment";
    Sensors, 19 (2019), 23; 25 pages. BibTeX, More information

  9. G. Retscher, V. Gikas, H. Hofer, H. Perakis, A. Kealy:
    "Range validation of UWB and Wi-Fi for integrated indoor positioning";
    Applied Geomatics (invited), 11 (2019), 2; 187 - 195. BibTeX, More information

  10. G. Retscher, J. Kleine, L. Whitemore:
    "Trilateration Approaches for Seamless Out-/Indoor GNSS and Wi-Fi Smartphone Positioning";
    Journal of Applied Geodesy (invited), 13 (2019), 1; 47 - 61. BibTeX, More information

  11. G. Retscher, A. Leb:
    "Indoor WLAN Fingerprinting mittels kinematischen Trainingsmessungen";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), begutachteter Beitrag (invited), 107 (2019), 1; 27 - 43. BibTeX, More information

  12. Y. Li, S. Williams, B. Moran, A. Kealy, G. Retscher:
    "High-Dimensional Probabilistic Fingerprinting in Wireless Sensor Networks Based on a Multivariate Gaussian Mixture Model";
    Sensors (invited), 18 (2018), 8; 24 pages. BibTeX, More information

  13. G. Retscher, J. Kleine, L. Whitemore:
    "Trilaterationsansätze für WLAN Positionierung in Gebäuden";
    Allgemeine Vermessungs-Nachrichten (AVN) begutachtete Beiträge (invited), 125 (2018), 8-9; 264 - 273. BibTeX, More information

  14. G. Retscher, F. Obex:
    "A Cooperative Positioning Service for Multi-modal Public Transit Situations";
    The Journal of Navigation, 71 (2018), 2; 371 - 388. BibTeX, More information

  15. S. Goel, A. Kealy, V. Gikas, G. Retscher, C. Toth, D. Grejner-Brzezinska, B. Lohani:
    "Cooperative Localization of Unmanned Aerial Vehicles Using GNSS, MEMS Inertial, and UWB Sensors";
    Journal of Surveying Engineering (invited), 143 (2017), 4; 04017007-1 - 04017007-18. BibTeX, More information

  16. H. Hofer, G. Retscher:
    "Seamless Navigation Using GNSS and Wi-Fi/IN with Intelligent Checkpoints";
    Journal of Location Based Services, 11 (2017), 3-4; 204 - 221. BibTeX, More information

  17. A. Kealy, G. Retscher:
    "MEMS and Wireless Options - User Localization in Cellular Phones";
    GPS World (invited), 28 (2017), 7; 22 - 28. BibTeX, More information

  18. G. Retscher, H. Hofer:
    "Wi-Fi Location Fingerprinting Using an Intelligent Checkpoint Sequence";
    Journal of Applied Geodesy, 11 (2017), 3; 197 - 205. BibTeX, More information

  19. G. Retscher, T. Tatschl:
    "Indoor Positioning with Differential Wi-Fi Lateration";
    Journal of Applied Geodesy, 11 (2017), 4; 249 - 269. BibTeX, More information

  20. G. Retscher, T. Tatschl:
    "Positionierung in Gebäuden mit differenziellem WLAN";
    Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), 142 (2017), 2; 111 - 125. BibTeX, More information

  21. V. Gikas, C. Antoniou, G. Retscher, A. Panagopoulos, A. Kealy, H. Perakis, T. Mpimis:
    "A Low-Cost Wireless Sensors Positioning Solution for Indoor Parking Facilities Management";
    Journal of Location Based Services (invited), 10 (2016), 3; 1 - 21. BibTeX, More information

  22. H. Hofer, G. Retscher:
    "Smartphone Navigation anhand von "intelligenten Check-Points"";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), begutachteter Beitrag (invited), 104 (2016), 2; 61 - 71. BibTeX, More information

  23. H.-B. Neuner, G. Retscher:
    "Editorial to the Special Edition on Deformation Monitoring";
    Journal of Applied Geodesy (invited), 10 (2016), 1; 1 - 3. BibTeX,

  24. A. Kealy, G. Retscher, C. Toth, A. Hasnur-Rabiain, V. Gikas, D. Grejner-Brzezinska, C. Danezis, T. Moore:
    "Collaborative Navigation as a Solution for PNT Applications in GNSS Challenged Environments - Report on Field Trials of a Joint FIG/IAG Working Group";
    Journal of Applied Geodesy (invited), 9 (2015), 4; 244 - 263. BibTeX, More information

  25. G. Retscher, S. Heuböck:
    "Performance Evaluation of the Use of a Low-cost High Sensitivity GPS (HS-GPS) Receiver in Forests";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), begutachteter Beitrag (invited), 103 (2015), 2+3; 174 - 181. BibTeX, More information

  26. G. Retscher, F. Obex:
    "InKoPoMoVer - Cooperative Positioning for Real-time User Assistance and Guidance at Multi-modal Public Transit Junctions";
    Journal of Applied Geodesy (invited), 9 (2015), 3; 198 - 206. BibTeX, More information

  27. G. Retscher, F. Obex:
    "Ubiquitous User Localization in LBS - The Need for Implementing Ethical Thinking in Our Research Field";
    Journal of Applied Geodesy (invited), 9 (2015), 4; 264 - 278. BibTeX, More information

  28. Y. Bai, S. Wu, G. Retscher, A. Kealy, L. Holden, M. Tomko, A. Borriak, B. Hu, H. Wu, K. Zhang:
    "A New Method for Improving Wi-Fi Based Indoor Positioning Accuracy";
    Journal of Location Based Services (invited), 8 (2014), 3; 135 - 147. BibTeX, More information

  29. G. Retscher:
    "Editorial to the Special Edition of the JAG on Engineering Geodesy";
    Journal of Applied Geodesy (invited), 8 (2014), 4; 235 - 239. BibTeX,

  30. G. Retscher, I. Kabashi:
    "Possibilities of Using Radio Frequency Identification (RFID) for Disaster Management";
    Journal Micro Macro & Mezzo Geo Information (invited), 1 (2014), 2; 1 - 5. BibTeX, More information

  31. G. Retscher, F. Obex:
    "Collaborative Navigation and Guidance in Underground Networks Using RFID";
    Coordinates (invited), 10 (2014), 7; 8 - 10. BibTeX, More information

  32. K. Yu, I. Oppermann, E. Dutkiewicz, I. Sharp, G. Retscher:
    "Indoor Navigation and Tracking";
    Physical Communication (invited), 13 (2014), A; 1 - 3. BibTeX,

  33. A. Kealy, G. Retscher, V. Schwieger:
    "Preface to the Special Edition of the JAG on Ubiquitous Positioning and Navigation Systems";
    Journal of Applied Geodesy (invited), 7 (2013), 4; 227 - 230. BibTeX,

  34. E. Mok, F. Lau, L. Xia, G. Retscher, H. Tian:
    "Influential Factors for Decimetre Level Positioning Using Ultra Wide Band Technology";
    Survey Review, 44 (2012), 324; 37 - 44. BibTeX, More information

  35. W. Niemeier, G. Retscher, X. Ding:
    "Editorial: Special Issue on Deformation Monitoring";
    Journal of Applied Geodesy (invited), 6 (2012), 3/4; 111 - 115. BibTeX,

  36. G. Retscher:
    "Preface to the Special Issue on Multi-sensor Systems in Engineering Geodesy and Navigation";
    Journal of Applied Geodesy (invited), 6 (2012), 1; 1 - 2. BibTeX,

  37. E. Mok, L. Xia, G. Retscher, T. Hui:
    "A Case Study on the Feasibility and Performance of an UWB-AoA Real Time Location System for Resources Management of Civil Construction Projects";
    Journal of Applied Geodesy (invited), 4 (2010), 1; 23 - 32. BibTeX, More information

  38. J. Böhm, G. Retscher:
    "Geodesy for Planet Earth - Session 4 Positioning and Applications";
    Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), 6 (2009), 134. Jahrgang; 377 - 378. BibTeX,

  39. Q. Fu, G. Retscher:
    "Active RFID Trilateration and Location Fingerprinting Based on RSSI for Pedestrian Navigation";
    The Journal of Navigation, 62 (2009), 2 (April); 323 - 340. BibTeX, More information

  40. Q. Fu, G. Retscher:
    "Another Look Indoors";
    GPS World (invited), 20 (2009), 3; 40 - 43. BibTeX, More information

  41. G. Liu, K. Zhang, F. Wu, L. Densley, G. Retscher:
    "Characterisation of Current and Future GNSS Performance in Urban Canyons Using a High Quality 3-D Urban Model of Melbourne, Australia";
    Journal of Applied Geodesy, 3 (2009), 1; 15 - 24. BibTeX, More information

  42. G. Retscher, Q. Fu:
    "An Intelligent Personal Navigator Integrating GNSS, RFID and INS for Continuous Position Determination";
    Boletim de Ciencias Geodesicas (invited), 15 (2009), 5; 707 - 724. BibTeX, More information

  43. G. Retscher, Q. Fu:
    "Active RFID Trilateration for Indoor Positioning";
    Coordinates, IV (2008), 5; 10 - 15. BibTeX, More information

  44. A. Kealy, G. Retscher, S. Winter:
    "Next Generation Mobile Mapping Systems - Strategies for Development";
    European Journal of Navigation, 5 (2007), 3; 6 - 13. BibTeX, More information

  45. A. Kealy, S. Winter, G. Retscher:
    "Intelligent Location Models for Next Generation Location-based Services";
    Journal of Location Based Services, 1 (2007), 4; 237 - 255. BibTeX, More information

  46. E. Mok, G. Retscher:
    "Location Determination Using WiFi - Fingerprinting Versus WiFi - Trilateration";
    Journal of Location Based Services, 1 (2007), 2; 145 - 159. BibTeX, More information

  47. G. Retscher:
    "A Knowledge-based Kalman Filter for an Intelligent Pedestrian Navigation System";
    Survey Review, 39 (2007), 306; 282 - 293. BibTeX, More information

  48. G. Retscher:
    "Augmentation of Indoor Positioning Systems with a Barometric Pressure Sensor for Direct Altitude Determination in a Multi-storey Building";
    Cartography and Geographic Information Science, 34 (2007), 4; 305 - 310. BibTeX, More information

  49. G. Retscher:
    "Investigations of Selected Systems for Indoor and Pedestrian Navigation";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), begutachteter Spezialband, 95 (2007), 2; 166 - 172. BibTeX, More information

  50. G. Retscher:
    "Test and Integration of Location Sensors for a Multi-sensor Personal Navigatior";
    The Journal of Navigation, 60 (2007), 1; 107 - 117. BibTeX, More information

  51. G. Retscher, E. Mok:
    "Testing of Location Systems using WiFi in Indoor Environments";
    Coordinates, III (2007), 10; 6 - 11. BibTeX, More information

  52. G. Retscher, E. Moser:
    "Genauigkeits- und Leistungstest eines WLAN Indoor Positionierungssystems";
    Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), 132 (2007), 1; 4 - 10. BibTeX, More information

  53. G. Retscher, E. Moser, D. Vredeveld, D. Heberling, J. Pamp:
    "Performance and Accuracy Test of a WiFi Indoor Positioning System";
    Journal of Applied Geodesy, 1 (2007), 2; 103 - 110. BibTeX, More information

  54. G. Retscher:
    "3-D Location Determination in Multi-storey Buildings";
    European Journal of Navigation, 4 (2006), 3; 49 - 54. BibTeX, More information

  55. G. Retscher:
    "NAVIO - Integration of GNSS with Other Sensors for Pedestrian Navigation";
    Location Magazine (invited), 1 (2006), 9-10. BibTeX, More information

  56. G. Retscher, C. Hiller:
    "Test und Integration von Sensoren für die Positonsbestimmung in einem Fußgängernavigationssystem";
    Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), 131 (2006), 6; 345 - 351. BibTeX, More information

  57. G. Retscher, A. Kealy:
    "Ubiquitous Positioning Technologies for Modern Intelligent Navigation Systems";
    The Journal of Navigation, 59 (2006), 1; 91 - 103. BibTeX, More information

  58. G. Retscher, M. Kistenich:
    "Vergleich von Systemen zur Positionsbestimmung und Navigation in Gebäuden";
    Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), 131 (2006), 1; 25 - 35. BibTeX, More information

  59. G. Retscher, M. Thienelt:
    "NAVIO - A Navigation Service of Pedestrians";
    Journal of Space Communication (invited), Global Navigation (2006), 9; 10 pages. BibTeX, More information

  60. G. Retscher, M. Thienelt, C. Hiller:
    "NAVIO - Ein Multisensorsystem für die Positionsbestimmung von Fußgängern";
    The Navigation View, Magazin des Österreichischen Vereins für Navigation (OVN) (invited), 6 (2006), II; 5 - 13. BibTeX, More information

  61. G. Retscher, K. Zhang, S. Zhang, Y. Wang:
    "RFID and GNSS for Indoor and Outdoor Positioning - Two Different Case Studies";
    European Journal of Navigation, 4 (2006), 5; 49 - 54. BibTeX, More information

  62. G. Gartner, V. Radoczky, G. Retscher:
    "Location technologies for pedestrian navigation";
    GIS Development (invited), 9 (2005), 4; 22 - 25. BibTeX, More information

  63. G. Retscher:
    "Höhenbestimmung in einem Gebäude mit einem digitalen Barometer für die Navigation von Fußgängern";
    Allgemeine Vermessungs-Nachrichten (AVN), 112 (2005), 10; 348 - 354. BibTeX, More information

  64. G. Retscher, E. Mok, W. Yan:
    "Performance Test of Location-based Services in Hong Kong";
    European Journal of Navigation, 3 (2005), 3; 22 - 27. BibTeX, More information

  65. G. Retscher:
    "Allgegenwärtige Positionierungsmethoden für Moderne und Intelligente Navigationssysteme und -dienste.";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), 92 (2004), 3-4; 136 - 144. BibTeX, More information

  66. G. Retscher, E. Mok:
    "Sensor Fusion and Integration using an Adapted Kalman Filter Approach for Modern Navigation System";
    Survey Review, 37 (2004), 292; 439 - 447. BibTeX, More information

  67. G. Retscher, M. Thienelt:
    "Die Zukunft des Einkaufens - Was können Geodäten dazu beitragen?";
    Allgemeine Vermessungs-Nachrichten (AVN), 111 (2004), 11-12; 387 - 393. BibTeX, More information

  68. G. Retscher, M. Thienelt:
    "NAVIO - A Navigation and Guidance Service for Pedestrians";
    Journal of Global Positioning Systems (Print Version), 3 (2004), 1 - 2; 208 - 217. BibTeX, More information

  69. G. Retscher, P. Anzinger:
    "Analyse der Satellitenverfügbarkeit in Wien als Basis zum Aufbau des GNSS-Referenzstationsnetzes von Wienstrom (WEP)";
    Allgemeine Vermessungs-Nachrichten (AVN), 110 (2003), 2; 60 - 70. BibTeX, More information

  70. G. Retscher, G. Skolaut:
    "Untersuchung von Messsensoren zum Einsatz in Navigationssystemen für Fußgänger";
    Zeitschrift für Geodäsie, Geoinformation und Landmanagement (zfv), 128 (2003), 2; 118 - 129. BibTeX, More information

  71. E. Mok, G. Retscher, L. Lau:
    "Development of an Event-Reporting Intelligent Vehicle Navigation System for Areas with Urban Canyons";
    Survey Review, 36 (2002), 284; 398 - 409. BibTeX, More information

  72. G. Retscher:
    "Accuracy Performance of Virtual Reference Station (VRS) Networks";
    Journal of Global Positioning Systems (Print Version), 1 (2002), 1; 40 - 47. BibTeX, More information

  73. G. Retscher:
    "Einsatz von Location Based Services (LBS) als Navigationshilfe: Integration in moderne Navigationssysteme";
    Österreichische Zeitschrift für Vermessung und Geoinformation (VGI), 90 (2002), 1; 2 - 12. BibTeX, More information

Editorials in Scientific Journals

  1. V. Gikas, G. Retscher, H. Kahmen, H.-B. Neuner, C. Rizos:
    "Editorial to the Special Edition of the JAG on Deformation Monitoring";
    Journal of Applied Geodesy, 14 (2020), 2; 119. BibTeX,

  2. H.-B. Neuner, G. Retscher, H. Kahmen, C. Rizos:
    "Editorial to the Special Edition on Deformation Monitoring";
    Journal of Applied Geodesy (invited), 11 (2017), 2; 63 - 65. BibTeX,

Contributions to Books

  1. V. Gikas, G. Retscher, A. Kealy:
    "Collaborative Positioning for Urban Intelligent Transportation Systems (ITS) and Personal Mobility (PM): Challenges and Perspectives";
    in: "Mobility Patterns, Big Data and Transport Analytics - Tools and Applications for Modeling", issued by: Antoniou C., Dimitriou L., Pereira F.; Elsevier, 2018, (invited), ISBN: 9780128129708, 381 - 414. BibTeX,

  2. G. Retscher, A. Kealy:
    "Navigation Based on Sensors in Smartphones";
    in: "Positioning and Navigation in Complex Environments", issued by: Kegen Yu; IGI Global, Hershey PA, USA, 2018, (invited), ISBN: 9781522535287, 368 - 396. BibTeX, More information

  3. G. Retscher, F. Roth:
    "Wi-Fi Fingerprinting with Reduced Signal Strength Observations from Long-time Measurements";
    in: "Progress in Location-Based Services 2016", G. Gartner, H. Huang (ed.); issued by: E120-6; Springer Verlag, 2017, (invited), ISBN: 978-3-319-47289-8, 3 - 24. BibTeX, More information

  4. G. Retscher:
    "Indoor Navigation";
    in: "Encyclopedia of Geodesy", E. Grafarend (ed.); Springer Verlag, Schweiz, 2016, (invited), ISBN: 978-3-319-02370-0, 1 - 7. BibTeX,

  5. G. Retscher, A. Reiterer, G. Mentes:
    "Advances of Engineering Geodesy and Artificial Intelligence in Monitoring of Movements and Deformations of Natural and Man-made Structures";
    in: "Earth on the Edge. Science for a Sustainable Planet", C. Rizos, P. Willis (ed.); issued by: IAG; Series: International Association of Geodesy Symposia, Springer-Verlag Berlin, Heidelberg, 2014, ISBN: 978-3-642-37221-6, 481 - 486. BibTeX, More information

  6. G. Retscher:
    "An Intelligent Personal Navigator Integrating GNSS, RFID and INS";
    in: "Geodesy for Planet Earth", S. Kenyon, M. Pacino, U. Marti (ed.); issued by: IAG; Springer Verlag, Berlin Heidelberg, 2012, ISBN: 978-3-642-20337-4, 949 - 956. BibTeX, More information

  7. G. Retscher, A. Reiterer, G. Mentes:
    "Report of Sub-Commission 4.2 "Applications of Geodesy in Engineering"";
    in: "Geodesy for Planet Earth", S. Kenyon, M. Pacino, U. Marti (ed.); issued by: IAG; Springer Verlag, Berlin Heidelberg, 2012, ISBN: 978-3-642-20337-4, 719 - 724. BibTeX, More information

  8. G. Retscher, M. Zhu, K. Zhang:
    "RFID Positioning";
    in: "Ubiquitous Positioning and Mobile Location-Based Services in Smart Phones", R. Chen (ed.); IGI Global, Hershey, PA, USA, 2012, (invited), ISBN: 978-1-4666-1827-5, 69 - 95. BibTeX, More information

  9. S. Verhagen, D. Grejner-Brzezinska, G. Retscher, M. Santos, X. Ding, Y. Gao, S. Jin:
    "Geodetic Sensor Systems and Sensor Networks: Positioning and Applications";
    in: "VII Hotine-Marussi Symposium on Mathematical Geodesy", N. Sneeuw, P. Novák, M. Crespi, F. Sansò (ed.); issued by: IAG; Springer Verlag, Berlin Heidelberg, 2012, ISBN: 978-3-642-22077-7, 47 - 51. BibTeX, More information

  10. S. Verhagen, G. Retscher, M. Santos, X. Ding, Y. Gao, S. Jin:
    "Positioning and Applications for Planet Earth";
    in: "Geodesy for Planet Earth", S. Kenyon, M. Pacino, U. Marti (ed.); issued by: IAG; Springer Verlag, Berlin Heidelberg, 2012, ISBN: 978-3-642-20337-4, 713 - 718. BibTeX, More information

  11. Q. Fu, G. Retscher:
    "Using RFID and INS for Indoor Positioning";
    in: "Location Based Services and TeleCartography II - From Sensor Fusion to Context Models, Lecture Notes in Geoinformation and Cartography", G. Gartner, K. Rehrl (ed.); Springer Verlag, Berlin - Heidelberg, 2008, ISBN: 978-3-540-87392-1, 421 - 438. BibTeX, More information

  12. K. Zhang, G. Liu, F. Wu, L. Densley, G. Retscher:
    "An Investigation of the Signal Performance of the Current and Future GNSS in Typical Urban Canyons in Australia Using a High Fidelity 3D Urban Model";
    in: "Location Based Services and TeleCartography II - From Sensor Fusion to Context Models, Lecture Notes in Geoinformation and Cartography", G. Gartner, K. Rehrl (ed.); Springer Verlag, Berlin - Heidelberg, 2008, ISBN: 978-3-540-87392-1, 407 - 420. BibTeX, More information

  13. K. Zhang, M. Zhu, G. Retscher, F. Wu, W. Cartwright:
    "Three-Dimension Indoor Positioning Algorithms Using an Integrated RFID/INS System in Multi-storey Buildings";
    in: "Location Based Services and TeleCartography II - From Sensor Fusion to Context Models, Lecture Notes in Geoinformation and Cartography", G. Gartner, K. Rehrl (ed.); Springer Verlag, Berlin - Heidelberg, 2008, ISBN: 978-3-540-87392-1, 373 - 386. BibTeX, More information

  14. G. Retscher:
    "Altitude Determination of Pedestrian in a Multi-storey Building";
    in: "Location Based Services and TeleCartography, Lecture Notes in Geoinformation and Carthography", G. Gartner, W. Cartwright, M. Peterson (ed.); Springer, Berlin, Heidelberg, 2007, (invited), ISBN: 978-3-540-36727-7, 119 - 130. BibTeX, More information

  15. G. Retscher:
    "Multi-sensor Systems for Pedestrian Navigation and Guidance Services";
    in: "Advances in Mobile Mapping Technology, ISPRS Book Series, Vol. 4", V. Tao, J. Li (ed.); Taylor & Francis, London, 2007, (invited), ISBN: 978-0-415-42723-4, 89 - 94. BibTeX, More information

  16. G. Retscher:
    "Location Based Services und persönliche Navigation";
    in: "Angewandte Geodäsie: Vermessungskunde", H. Kahmen (ed.); Walter de Gruyter, Berlin, New York, 2006, (invited), ISBN: 3-11-018464-8, 541 - 552. BibTeX,

  17. G. Retscher:
    "Allgegenwärtige Positionierungsmethoden für Intelligente Navigationssysteme";
    in: "Geowissenschaftliche Mitteilungen, Schriftenreihe der Studienrichtung Vermessungswesen und Geoinformation der TU Wien", issued by: Institut für Geodäsie und Geophysik, Forschungsgruppe Ingenieurgeodäsie; Geowissenschaftliche Mitteilungen, Band 71, Wien, 2005, (invited), ISSN: 1811-8380, 103 - 109. BibTeX, More information

Contributions to Proceedings

  1. M. Gunawan, B. Li, T. Gallagher, A. Dempster, G. Retscher:
    "A New Method to Generate and Maintain a WiFi Fingerprinting Database Automatically by Using RFID";
    in: "IPIN 2012", issued by: IEEE Xplore; IEEE Explore, 2012 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 2012, 1 - 6. BibTeX, More information

  2. A. Kealy, G. Retscher, N. Alam, A. Hasnur-Rabiain, C. Toth, D. Grejner-Brzezinska, T. Moore, C. Hill, V. Gikas, C. Hide, C. Danezis, L. Bonenberg, G. Roberts:
    "Collaborative Navigation with Ground Vehicles and Personal Navigators";
    in: "IPIN 2012", issued by: IEEE Xplore; IEEE Explore, 2012 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 2012, 1 - 8. BibTeX, More information

  3. E. Mok, G. Retscher, C. Wen:
    "Initial Test on the Use of GPS and Sensor Data of Modern Smartphones for Vehicle Tracking in Dense High Rise Environments";
    in: "UPINLBS 2012", issued by: IEEE Xplore; IEEE Explore, 2012 Ubiquitous Positioning Indoor Navigation and Location Based Service (UPINLBS), 2012, 1 - 7. BibTeX, More information

  4. G. Retscher, T. Hecht:
    "Investigation of Location Capabilities of four Different Smartphones for LBS Navigation Applications";
    in: "IPIN 2012", issued by: IEEE Xplore; IEEE Explore, 2012 International Conference on Indoor Positioning and Indoor Navigation (IPIN), 2012, 1 - 6. BibTeX, More information

  5. I. Kabashi, G. Retscher:
    "Guidance and Steering of Construction Machines in Tunnelling";
    in: "Optical 3-D Measurement Techniques IX", A. Grün, H. Kahmen (ed.); issued by: Institute of Geodesy and Geophysics, Vienna University of Technology; 9th Conference on Optical 3-D Measurement Techniques, July 1-3, 2009, Vienna, Austria, Wien, 2009, ISBN: 978-3-9501492-5-8, 171 - 178. BibTeX, More information

  6. G. Retscher:
    "An Intelligent Personal Navigator Integrating GNSS, RFID and INS";
    accepted for publication in: "Papers presented at the IAG 2009 Conference `Geodesy for Planet Earth´, August 31 - September 4, 2009, Buenos Aires, Argentinia", Springer, 2009. BibTeX, More information

  7. G. Retscher, A. Reiterer, G. Mentes:
    "Report of Sub-Commission 4.2 `Applications of Geodesy in Engineering´";
    accepted for publication in: "Papers presented at the IAG 2009 Conference `Geodesy for Planet Earth´, August 31 - September 4, 2009, Buenos Aires, Argentinia", Springer, 2009. BibTeX, More information

  8. S. Verhagen, D. Grejner-Brzezinska, G. Retscher, M. Santos, X. Ding, Y. Gao, S. Jin, R. Weber:
    "Geodetic Sensor Systems and Sensor Networks - Positioning and Applications";
    accepted for publication in: "Papers presented at the 7th Hotine-Marussi Symposium, July 6-10, Rome, Italy", Springer, Rome, 2009. BibTeX, More information

  9. S. Verhagen, G. Retscher, M. Santos, X. Ding, Y. Gao, S. Jin:
    "Positioning and applications for planet Earth";
    accepted for publication in: "Papers presented at the IAG 2009 Conference `Geodesy for Planet Earth´, August 31 - September 4, 2009, Buenos Aires, Argentinia", Springer, 2009. BibTeX, More information

  10. G. Retscher:
    "A Knowledge-based Kalman Filter Approach for an Intelligent Pedestrian Navigation System";
    in: "ION GNSS 2005 Conference", issued by: Institute of Navigation; ION GNSS 2005 Conference, Long Beach, California, USA, 2005, 11 pages. BibTeX, More information

Talks and Poster Presentations (with Proceedings-Entry)

  1. G. Gartner, A. Binn, J. Gabela, G. Retscher, V. Gikas, M. Schmidt, W. Wang:
    "From project-based to problem-based learning in engineering disciplines: enhancing Cartography and Geomatics education";
    Talk: 8th International Conference on Higher Education Advances (HEAd´22), Valencia, Spain; 2022-06-14 - 2022-06-17; in: "Eighth International Conference on Higher Education Advances", (2022), ISSN: 2603-5871; 423 - 430. BibTeX, More information

  2. G. Retscher, P. Zariqi, G. Gartner:
    "Analyses of Bluetooth Distance Measurements for Digital Contact Tracing";
    Talk: International Symposium on Geospatial Approaches to Combating Covid-19, Florence, Italy (invited); 2021-12-13 - 2021-12-14; in: "International Symposium on Geospatial Approaches to Combating Covid-19", (2021), 5 pages. BibTeX, More information

  3. W. Błaszczak-Bąk, G. Retscher, J. Janicka, M. Uradziński, M. Bednarczyk, J. Gabela:
    "Dual-frequency GNSS/Wi-Fi Smartphone Navigation";
    Talk: 16th International Conference on Location-Based Services, Glasgow (invited); 2021-11-24 - 2021-11-25; in: "16th International Conference on Location Based Services", (2021), Paper ID 5, 6 pages. BibTeX, More information

  4. G. Retscher, P. Zariqi, A. Pinilla Pachon, J. Ceballus Cantu, S. Madawalagama:
    "Bluetooth Distance Estimation for COVID-19 Contact Tracing";
    Talk: 16th International Conference on Location-Based Services, Glasgow (invited); 2021-11-24 - 2021-11-25; in: "16th International Conference on Location Based Services", (2021), Paper ID 1, 15 pages. BibTeX, More information

  5. T. Weigert, G. Retscher:
    "Positioning Performance Evaluation of a Dual Frequency Multi-GNSS Smartphone";
    Talk: 16th International Conference on Location-Based Services, Glasgow (invited); 2021-11-24 - 2021-11-25; in: "16th International Conference on Location Based Services", (2021), Paper ID 2, 21 pages. BibTeX, More information

  6. A. Masiero, C. Toth, J. Gabela, G. Retscher:
    "Assessment of Car Collaborative Positioning with UWB and Vision";
    Talk: International Archives of Photogrammetry and Remote Sensing of the ISPRS, Working Group VI/3, Nice, France (invited); 2021-07-05 - 2021-07-09; in: "ISPRS Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences", XLIII-B1-2021 (2021), 7 pages. BibTeX, More information

  7. A. Leb, G. Retscher:
    "Study for the Development of a Guidance and Information System Based on Wi Fi for TU Wien";
    Talk: FIG Working Week 2021, The Netherlands (invited); 2021-06-20 - 2021-06-25; in: "FIG Working Week 2021 20 - 25 June Smart Surveyors for Land and Water Management Challenges in a new Reality", (2021), Paper ID 10863, 15 pages. BibTeX, More information

  8. G. Retscher, V. Gikas, R. Gerike:
    "Curricula Enrichment for Sri Lankan Universities Delivered through the Application of Location-Based Services to Intelligent Transport Systems";
    Talk: FIG Working Week 2021, The Netherlands (invited); 2021-06-20 - 2021-06-25; in: "FIG eWorking Week 2021", (2021), Paper ID 10865, 16 pages. BibTeX, More information

  9. G. Retscher, A. Leb:
    "Development of a Navigation and Information Service for a University Library";
    Talk: 2021 International Technical Meeting ION ITM, virtual; 2021-01-25 - 2021-01-28; in: "2021 International Technical Meeting ION ITM", (2021), Paper ID 19, 14 pages. BibTeX, More information

  10. W. Cheng, Y. Dai, N. El-Sheimy, C. Wen, G. Retscher, Z. Kang, A. Lingua:
    "ISPRS Benchmark on Multisensory Indoor Mapping and Positioning";
    Talk: ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Nice, France (invited); 2020-08-31 - 2020-09-02; in: "ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences", (2020), 117 - 123. BibTeX, More information

  11. A. Masiero, H. Perakis, J. Gabela, C. Toth, V. Gikas, G. Retscher, S. Goel, A. Kealy, Z. Koppanyi, W. Błaszczak-Bąk, Y. Li, D. Grejner-Brzezinska:
    "Indoor Navigation and Mapping: Performance Analysis of UWB-based Platform Positioning";
    Talk: The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Nice, France (invited); 2020-08-31 - 2020-09-02; in: "The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences", Volume XLIII-B1-2020 (2020), 549 - 555. BibTeX, More information

  12. G. Retscher, Y. Li, A. Kealy, V. Gikas:
    "The Need and Challenges for Ubiquitous Positioning, Navigation and Timing (PNT) Using Wi-Fi";
    Talk: FIG Working Week 2020, Amsterdam, The Netherlands (invited); 2020-05-10 - 2020-05-14; in: "FIG Working Week 2020", (2020), Paper ID 10335, 18 pages. BibTeX, More information

  13. G. Retscher, A. Bekenova:
    "Urban Wi-Fi RSSI Analysis along a Public Transport Route for Kinematic Localization";
    Talk: IEEE/ION Plans 2020, Portland, Oregon, USA (invited); 2020-04-20 - 2020-04-23; in: "Ieee/ion Plans 2020", IEEE, (2020), 8 pages. BibTeX, More information

  14. Y. Bai, A. Kealy, G. Retscher, L. Hoden:
    "A Comparative Evaluation of Wi-Fi RTT and GPS Based Positioning";
    Talk: International Global Navigation Satellite Systems (IGNSS) 2020, Sydney, Australia (invited); 2020-02-05 - 2020-02-07; in: "International Global Navigation Satellite Systems (IGNSS) 2020", (2020), Paper ID 10, 12 pages. BibTeX, More information

  15. S. Goel, J. Gabela, G. Retscher, C. Toth, A. Masiero, A. Kealy:
    "UWB Cooperative Localization of Pedestrians along a Constrained Building Hallway";
    Talk: International Global Navigation Satellite Systems (IGNSS) 2020, Sydney, Australia (invited); 2020-02-05 - 2020-02-07; in: "International Global Navigation Satellite Systems (IGNSS) 2020", (2020), Paper ID 7, 13 pages. BibTeX, More information

  16. J. Rajavarathan, T. Dammalage, G. Retscher, A. Kealy:
    "Performance Analysis of GAGAN and Trimble RTX Satellite Based Augmentation Services in Respective to Equatorial Ionospheric Conditions";
    Talk: International Global Navigation Satellite Systems (IGNSS) 2020, Sydney, Australia (invited); 2020-02-05 - 2020-02-07; in: "International Global Navigation Satellite Systems (IGNSS) 2020", (2020), Paper ID 5, 11 pages. BibTeX, More information

  17. P. Ranasinghe, T. Dammalage, G. Retscher:
    "A Low-cost Public Transport Tracking and Information System for Commuters in Sri Lanka";
    Poster: 15th International Conference on Location-Based Services (LBS 2019), Wien (invited); 2019-11-11 - 2019-11-13; in: "Adjunct Proceedings of the 15th International Conference on Location-Based Services (LBS 2019)", (2019), Paper ID 25, 5 pages. BibTeX, More information

  18. G. Retscher, A. Bekenova, A. Fazliu, M. Hallett, L. Harvey, J. Janssen:
    "Dynamic Wi-Fi Reference Point Recognition along Public Transport Routes";
    Talk: 15th International Conference on Location Based Services (LBS 2019), Wien (invited); 2019-11-11 - 2019-11-13; in: "Adjunct Proceedings of the 15th International Conference on Location-Based Services (LBS 2019)", (2019), Paper ID 26, 10 pages. BibTeX, More information

  19. C. Wang, Y. Dai, N. El-Sheimy, C. Wen, G. Retscher, Z. Kang, A. Lingua:
    "Progress on ISPRS Benchmark on Multisensory Indoor Mapping and Positioning";
    Talk: ISPRS Geospatial Week 2019, Enschede, The Netherlands (invited); 2019-06-10 - 2019-06-14; in: "ISPRS Geospatial Week 2019", ISPRS Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Volume XLII-2/W13 (2019), ISSN: 1709-1713; Paper ID 370, 5 pages. BibTeX, More information

  20. G. Retscher, A. Leb:
    "Impact of Different Wi-Fi RSS Scan Durations on Kinematic Smartphone Positioning";
    Talk: 11th International Conference on Mobile Mapping Technology 2019, Shenzhen, China (invited); 2019-05-06 - 2019-05-08; in: "The 11th International Conference on Mobile Mapping Technology (MMT 2019)", (2019), Paper ID 26, 8 pages. BibTeX, More information

  21. A. Kealy, G. Retscher, J. Gabela, Y. Li, S. Goel, C. Toth, A. Masiero, W. Błaszczak-Bąk, V. Gikas, H. Perakis, Z. Koppanyi, D. Grejner-Brzezinska:
    "A Benchmarking Measurement Campaign in GNSS-denied/challenged Indoor/Outdoor and Transitional Environments";
    Talk: FIG Working Week 2019, Hanoi, Vietanm; 2019-04-22 - 2019-04-26; in: "FIG Working Week 2019", (2019), 19 pages. BibTeX,

  22. G. Retscher, A. Leb:
    "Influence of the RSSI Scan Duration of Smartphones in Kinematic Wi-Fi Fingerprinting";
    Talk: FIG Working Week 2019, Hanoi, Vietnam; 2019-04-22 - 2019-04-26; in: "FIG Working Week 2019", (2019), 15 pages. BibTeX, More information

  23. G. Retscher:
    "Indoor Altitude Determination Using MEMS-based Sensors in Smartphones";
    Talk: ION Pacific PNT Meeting, Honolulu, Hawaii (invited); 2019-04-08 - 2019-04-11; in: "ION Pacific PNT Meeting", Institute of Navigation, (2019), ISBN: 0-936406-22-4; Paper ID 49, 13 pages. BibTeX, More information

  24. G. Retscher, A. Bekenova:
    "Urban Wi-Fi Fingerprinting for Routing of Multi-modal Transport Users";
    Talk: ION Pacific PNT Meeting, Honolulu, Hawaii (invited); 2019-04-08 - 2019-04-11; in: "ION Pacific PNT Meeting", Institute of Navigation, (2019), ISBN: 0-936406-22-4; Paper ID 8, 10 pages. BibTeX, More information

  25. A. Kealy, G. Retscher, Y. Li, T. Gonzales, S. Goel, J. Gabela:
    "Robust Positioning Performance in Indoor Environments";
    Talk: International Symposium on GNSS 2018, Bali, Indonesia (invited); 2018-11-21 - 2018-11-23; in: "International Symposium on GNSS 2018", (2018), 10 pages. BibTeX, More information

  26. G. Retscher, J. Kleine, L. Whitemore:
    "Trilateration Approaches for Indoor Wi-Fi Positioning";
    Talk: International Symposium on GNSS 2018, Bali, Indonesia (invited); 2018-11-21 - 2018-11-23; in: "International Symposium on GNSS 2018", (2018), 7 pages. BibTeX, More information

  27. G. Retscher, Y. Li, A. Kealy, H. Hofer, J. Gabela, S. Goel, O. Qureshi, E. Smith, L. Bao:
    "Real-time Wi-Fi RSS Variation Correction Using a Network Differential Positioning Approach";
    Poster: 9th International Conference Indoor Positioning and Indoor Navigation IPIN 2018, Nantes, France (invited); 2018-09-24 - 2018-09-27; in: "9th International Conference Indoor Positioning and Indoor Navigation IPIN 2018", (2018), 1 - 4. BibTeX, More information

  28. G. Retscher:
    "Positioning in Location-based Services with an Emphasis on Indoor Environments";
    Talk: Workshop on Positioning and Navigation at the Faculty of Geomatics of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka (invited); 2018-07-07 - 2018-07-08; in: "Workshop on Positioning and Navigation", (2018), 1 - 100. BibTeX,

  29. A. Kealy, G. Retscher:
    "Robuts Positioning in Indoor Environments";
    Talk: FIG Congress 2018, Istanbul, Turkey (invited); 2018-05-06 - 2018-05-11; in: "FIG Congress 2018", (2018). BibTeX, More information

  30. G. Retscher, A. Stangl:
    "A Self-learning Fingerprinting Matching Algorithm for Indoor Wi-Fi Positioning";
    Talk: ION PLANS 2018 Conference, Monterey, USA (invited); 2018-04-23 - 2018-04-26; in: "ION PLANS 2018 Conference", (2018), Paper ID 124, 11 pages. BibTeX, More information

  31. G. Retscher, H. Hofer, F. Obex:
    "Localization and Guidance of Individuals or Groups in Multi-modal Transit Situations Using a Novel Cooperative Positioning Concept based on Differential Wi-Fi";
    Talk: 7th Transport Research Arena TRA 2018, Wien (invited); 2018-04-16 - 2018-04-19; in: "7th Transport Research Arena TRA 2018", (2018), Paper ID 10151, 10 pages. BibTeX, More information

  32. S. Goel, J. Gabela, A. Kealy, G. Retscher:
    "An Indoor-Outdoor Cooperative Localization Framework for UAVs";
    Talk: IGNSS Conference 2018, Sydney, Australia (invited); 2018-02-07 - 2018-02-09; in: "IGNSS 2018 Conference", (2018), Paper ID 12, 15 pages. BibTeX, More information

  33. G. Retscher, Y. Li, S. Williams, A. Kealy, B. Moran, S. Goel, J. Gabela:
    "Wi-Fi Positioning Using a Network Differential Approach for Real-time Calibration";
    Talk: IGNSS Conference 2018, Sydney, Australia (invited); 2018-02-07 - 2018-02-09; in: "IGNSS 2018 Conference", (2018), Paper ID 25, 15 pages. BibTeX, More information

  34. G. Retscher, H. Hofer, A. Kealy, V. Gikas, F. Obex:
    "Cooperative Localization in Indoor Environments Using Constrained Differential Wi-Fi and UWB Measurements";
    Talk: 30th International Technical Meeting of The Satellite Division of the Institute of Navigation (ION GNSS+ 2017), Portland, Oregon, USA (invited); 2017-09-25 - 2017-09-29; in: "Ion Gnss+ 2017", (2017), Paper ID 192, 13 pages. BibTeX, More information

  35. H. Hofer, G. Retscher:
    "Indoor Smartphone Navigation Using a Combination of Wi-Fi and Inertial Navigation with Intelligent Checkpoints";
    Poster: Indoor3D Workshop of the ISPRS Geospatial Week, Wuhan, China (invited); 2017-09-19 - 2017-09-20; in: "ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences", Volume IV-2/W4 (2017), 327 - 334. BibTeX, More information

  36. G. Retscher:
    "Fusion of Location Fingerprinting and Trilateration Based on the Example of Wi-Fi Positioning";
    Poster: Indoor3D Workshop of the ISPRS Geospatial Week, Wuhan, China (invited); 2017-09-19 - 2017-09-20; in: "ISPRS Annals of the Photogrammetry, Remote Sensing and Spatial Information Sciences", Volume IV-2/W4 (2017), 377 - 384. BibTeX, More information

  37. H. Hofer, G. Retscher:
    "Combined Wi-Fi and Inertial Navigation with Smart Phones in Out- and Indoor Environments";
    Talk: VTC2017-Spring Conference, Sydney, Australien (invited); 2017-07-04 - 2017-07-07; in: "VTC2017-Spring Conference", (2017), 978-1-5090-5932-4/17; 5 pages. BibTeX, More information

  38. V. Gikas, H. Perakis, A. Kealy, G. Retscher, C. Antoniou, T. Mpimis:
    "Indoor Parking Facilities Management Based on RFID CoO Positioning in Combination with Wi-Fi and UWB";
    Talk: FIG Working Week 2017, Helsinki, Finnland (invited); 2017-05-29 - 2017-06-02; in: "FIG Working Week 2017", FIG, https://www.fig.net/fig2017/technical_program.htm (2017), 15 pages. BibTeX, More information

  39. S. Goel, A. Kealy, B. Lohani, G. Retscher:
    "A Cooperative Localization System for Unmanned Aerial Vehicles: Prototype Development and Analysis";
    Talk: 10th International Symposium on Mobile Mapping Technology, Kairo, Ägypten (invited); 2017-05-06 - 2017-05-08; in: "International Symposium on Mobile Mapping Technology", (2017), 7 pages. BibTeX, More information

  40. G. Retscher, A. Kealy, V. Gikas, H. Hofer, A. Ettlinger, F. Obex:
    "Cooperative Localization in Indoor Environments Using Constrained Differential Wi-Fi and UWB Measurements";
    Talk: 10th International Symposium on Mobile Mapping Technology, Kairo, Ägypten (invited); 2017-05-06 - 2017-05-08; in: "International Symposium on Mobile Mapping Technology", (2017), Paper ID 49, 2 pages. BibTeX, More information

  41. A. Kealy, G. Retscher:
    "MEMS and Wireless Options in Cellular Phones for User Localization";
    Talk: ION Pacific PNT Conference, Honolulu, Hawaii, USA (invited); 2017-05-01 - 2017-05-04; in: "ION Pacific PNT", (2017), 13 pages. BibTeX, More information

  42. S. Goel, A. Kealy, G. Retscher, B. Lohani:
    "Cooperative P2I Localization Using UWB and Wi-Fi";
    Talk: IGNSS 2016 Conference, Sydney, Australien (invited); 2016-12-06 - 2016-12-08; in: "IGNSS 2016", (2016), Paper ID 16, 16 pages. BibTeX, More information

  43. H. Hofer, G. Retscher:
    "Combined Out- and Indoor Navigation with Smart Phones Using Intelligent Check Points";
    Poster: 13th International Symposium on Location-Based Services LBS 2016, Wien (invited); 2016-11-14 - 2016-11-16; in: "13th International Symposium on Location-Based Services LBS 2016", (2016), Paper ID 57, 9 pages. BibTeX, More information

  44. A. Ozga, G. Retscher:
    "Static Positioning with the Aid of GPS and Cellular Network for Android OS Smartphones";
    Poster: 13th International Symposium on Location-Based Services LBS 2016, Wien (invited); 2016-11-14 - 2016-11-16; in: "13th International Symposium on Location-Based Services LBS 2016", (2016), Paper ID 82, 30 pages. BibTeX, More information

  45. G. Retscher, J. Joksch:
    "Comparison of Different Vector Distance Measure Calculation Variants for Indoor Location Fingerprinting";
    Talk: 13th International Symposium on Location-Based Services LBS 2016, Wien (invited); 2016-11-14 - 2016-11-16; in: "13th International Symposium on Location-Based Services LBS 2016", (2016), Paper ID 10, 24 pages. BibTeX, More information

  46. G. Retscher, T. Tatschl:
    "Indoor Positioning Using Wi-Fi Lateration - Comparison of Two Common Range Conversion Models with Two Novel Differential Approaches";
    Talk: 4th International Conference Ubiquitous Positioning Indoor Navigation and Location Based Service UPINLBS, Shanghai (invited); 2016-11-03 - 2016-11-04; in: "4th International Conference Ubiquitous Positioning Indoor Navigation and Location Based Service UPINLBS", (2016), Paper ID 4, 10 pages. BibTeX, More information

  47. A. Ettlinger, G. Retscher:
    "Positioning Using Ambient Magnetic Fields in Combination with Wi-Fi and RFID";
    Talk: 7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016, Alcalá de Henares (invited); 2016-10-04 - 2016-10-06; in: "7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016", (2016), ISBN: 978-1-5090-2424-7; Paper ID 47, 8 pages. BibTeX, More information

  48. V. Gikas, A. Dimitratos, H. Perakis, G. Retscher, A. Ettlinger:
    "Full-scale Testing and Performance Evaluation of an Active RFID System for Positioning and Personal Mobility";
    Talk: 7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016, Alcalá de Henares (invited); 2016-10-04 - 2016-10-06; in: "IEEE Xplore 2016 International Conference on Indoor Positioning and Indoor Navigation (IPIN)", (2016), ISBN: 978-1-5090-2424-7; Paper ID 7743615, 8 pages. BibTeX, More information

  49. G. Retscher, J. Joksch:
    "Analysis of Nine Vector Distances for Fingerprinting in Multiple-SSID Wi-Fi Networks";
    Poster: 7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016, Alcalá de Henares (invited); 2016-10-04 - 2016-10-06; in: "7th International Conference Indoor Positioning and Indoor Navigation IPIN 2016", (2016), ISBN: 978-1-5090-2424-7; Paper ID 190, 5 pages. BibTeX, More information

  50. G. Retscher, Y. Li, A. Kealy, H. Hofer, J. Gabela, S. Goel, O. Qureshi, E. Smith, L. Bao:
    "Real-time Wi-Fi RSS Variation Correction Using a Network Differential Positioning Approach";
    Poster: 9th International Conference Indoor Positioning and Indoor Navigation IPIN 2018, Alcalá de Henares (invited); 2016-10-04 - 2016-10-06; in: "9th International Conference Indoor Positioning and Indoor Navigation IPIN 2018", (2016), ISBN: 978-1-5090-2424-7; 1 - 4. BibTeX, More information

  51. A. Ettlinger, G. Retscher:
    "Use of Magnetic Fields in Combination with Wi-Fi and RFID for Indoor Positioning";
    Poster: VIENNA young SCIENTISTS SYMPOSIUM 2016, Wien (invited); 2016-06-09 - 2016-06-10; in: "VIENNA young SCIENTISTS SYMPOSIUM 2016", B. Ullmann (ed.); Book-of-Abstracts.com, Gumpoldskirchen (2016), ISBN: 978-3-9504017-2-1; 84 - 85. BibTeX,

  52. V. Gikas, G. Retscher, A. Kealy, K. Zhang, J. Paffenholz, L. Ruotsalainen, H. Perakis, M. Santos:
    "IAG SC 4.1 "Emerging Positioning Technologies and Applications" - Objectives and Structure for the Term 2015-19";
    Poster: European Navigation Conference ENC 2016, Helsinki (invited); 2016-05-30 - 2016-06-02; in: "European Navigation Conference ENC 2016", (2016), Paper ID 111, 3 pages. BibTeX, More information

  53. G. Retscher, H. Hofer:
    "Wi-Fi Location Fingerprinting Using an Intelligent Checkpoint Sequence";
    Talk: 78th FIG Working Week 2016, Christchurch, Neuseeland (invited); 2016-05-02 - 2016-05-06; in: "78th FIG Working Week 2016", (2016), Paper ID 7993, 16 pages. BibTeX, More information

  54. G. Retscher, T. Tatschl:
    "Differential Wi-Fi - A Novel Approach for Wi-Fi Positioning Using Lateration";
    Talk: 78th FIG Working Week 2016, Christchurch, Neuseeland (invited); 2016-05-02 - 2016-05-06; in: "78th FIG Working Week 2016", (2016), Paper ID 7973, 17 pages. BibTeX, More information

  55. V. Gikas, C. Antoniou, G. Retscher, A. Panagopoulos, H. Perakis, A. Kealy, T. Mpimis, T. Economopoulos, A. Marousis:
    "A Low-cost RFID/WiFi Positioning Solution for Parking Facilities Management";
    Talk: 9th International Symposium on Mobile Mapping Technology, Sydney (invited); 2015-12-09 - 2015-12-11; in: "9th International Symposium on Mobile Mapping Technology", (2015), Paper ID 127, 7 pages. BibTeX, More information

  56. A. Kealy, S. Goel, G. Retscher, V. Gikas, C. Toth, D. Grejner-Brzezinska, B. Lohani:
    "Cooperative Localization of Unmanned Aerial Systems Using Low Cost GNSS and MEMS Inertial Sensors";
    Talk: 9th International Symposium on Mobile Mapping Technology, Sydney (invited); 2015-12-09 - 2015-12-11; in: "9th International Symposium on Mobile Mapping Technology", (2015), Paper ID 79, 11 pages. BibTeX, More information

  57. G. Retscher, F. Obex:
    "A User Assistance and Guidance Service for Multi-modal Public Transit Situations Based on Cooperative Positioning";
    Talk: 9th International Symposium on Mobile Mapping Technology, Sydney, Australien (invited); 2015-12-09 - 2015-12-11; in: "9th International Symposium on Mobile Mapping Technology", (2015), Paper ID 20, 7 pages. BibTeX, More information

  58. Y. Bai, R. Norman, Y. Zhao, S. Tang, S. Wu, H. Wu, G. Retscher, K. Zhang:
    "A New Algorithm for Improving the Tracking and Positioning of Cell of Origin";
    Talk: 2015 International Association of Institutes of Navigation World Congress IAIN, Prag, Tschechien (invited); 2015-10-20 - 2015-10-23; in: "2015 International Association of Institutes of Navigation World Congress", IEEE Xplore, (2015), ISBN: 978-1-4673-7634-1; 6 pages. BibTeX, More information

  59. V. Gikas, G. Retscher:
    "An RFID-based Virtual Gates Concept as a Complementary Tool for Indoor Vehicle Localization";
    Poster: 6th International Conference Indoor Positioning and Indoor Navigation IPIN, Banff, Canada (invited); 2015-10-13 - 2015-10-16; in: "6th International Conference Indoor Positioning and Indoor Navigation IPIN", (2015), Paper ID 1570179335, 2 pages. BibTeX, More information

  60. G. Retscher, H. Hofer:
    "A Novel Approach for Wi-Fi Fingerprinting Using Logical Sequences of Intelligent Checkpoints";
    Talk: IGNSS 2015 Conference, Surfers Paradise, Gold Coast, Australien (invited); 2015-07-14 - 2015-07-16; in: "IGNSS 2015", (2015), Paper ID 3, 16 pages. BibTeX, More information

  61. G. Retscher, F. Obex:
    "An Appeal to Discuss Ethical Issues in Context with Cooperative User Localization";
    Talk: IGNSS 2015 Conference, Surfers Paradise, Gold Coast, Australien (invited); 2015-07-14 - 2015-07-16; in: "IGNSS 2015 Conference", (2015), Paper ID 4, 13 pages. BibTeX, More information

  62. F. Obex, G. Retscher:
    "Ethical and Political Responsibility in Location Based Services - The Need of Implementing Ethical Thinking in Our Research Field";
    Talk: 11th International Symposium on Location-Based Services LBS 2014, Wien (invited); 2014-11-26 - 2014-11-28; in: "11th International Symposium on Location-Based Services LBS 2014", (2014), 14 pages. BibTeX, More information

  63. Y. Bai, S. Wu, Y. Ren, K. Ong, G. Retscher, A. Kealy, M. Tomko, M. Sanderson, H. Wu, K. Zhang:
    "A New Approach for Indoor Customer Tracking Based on a Single Wi-Fi Connection";
    Talk: 5th International Conference on Indoor Positioning and Indoor Navigation IPIN, Busan, South Korea (invited); 2014-10-27 - 2014-10-30; in: "5th International Conference on Indoor Positioning and Indoor Navigation IPIN", (2014), 7 pages. BibTeX, More information

  64. S. Heuböck, G. Retscher:
    "Agricultural Forest Applications and Boundary Surveys Using Low-cost High Sensitivity GPS (HS-GPS) Receivers";
    Talk: XXV International FIG Congress, Kuala Lumpur, Malaysia; 2014-06-16 - 2014-06-21; in: "XXV International FIG Congress", (2014), ISBN: 978-87-92853-21-9; Paper ID 6812, 15 pages. BibTeX, More information

  65. A. Kealy, G. Retscher, C. Toth, D. Grejner-Brzezinska:
    "Collaborative Positioning - Concepts and Approaches for More Robust Positioning";
    Talk: XXV International FIG Congress, Kuala Lumpur, Malaysia (invited); 2014-06-16 - 2014-06-21; in: "XXV International FIG Congress", (2014), ISBN: 978-87-92853-21-9; Paper ID 7053, 15 pages. BibTeX, More information

  66. G. Retscher:
    "The Fourth Layer in Collaborative Navigation - Going Underground";
    Talk: XXV International FIG Congress, Kuala Lumpur, Malaysia; 2014-06-16 - 2014-06-21; in: "XXV International FIG Congress", (2014), ISBN: 978-87-92853-21-9; Paper ID 6832, 15 pages. BibTeX, More information

  67. C. Toth, D. Grejner-Brzezinska, A. Kealy, G. Retscher:
    "Personal Navigation and Indoor Mapping: Performance Characterization of Kinect Sensor-based Trajectory Recovery";
    Talk: XXV International FIG Congress, Kuala Lumpur, Malaysia (invited); 2014-06-16 - 2014-06-21; in: "XXV International FIG Congress", (2014), ISBN: 978-87-92853-21-9; Paper ID 7172, 12 pages. BibTeX, More information

  68. G. Retscher, E. Mok, T. Hecht:
    "Smartphone Altitude Determination Using Embedded Barometric Pressure Sensors";
    Talk: 10th International Symposium on Location-Based Services LBS 2013, Shanghai, China (invited); 2013-11-21 - 2013-11-22; in: "10th International Symposium on Location-Based Services LBS 2013", (2013), 3 pages. BibTeX, More information

  69. S. Heuböck, G. Retscher:
    "Investigation of the Performance of Low-cost HS-GPS Under Different Kinds of Forest Canopy";
    Poster: IAG Scientific Assembly 2013, Potsdam, Germany (invited); 2013-09-01 - 2013-09-06; in: "IAG Scientific Assembly", (2013), 2 pages. BibTeX, More information

  70. D. Pradipta, G. Retscher:
    "Feasibility Study of the Possibilities to Reduce the Multipath Bias for Smartphone Positioning in Urban Environments";
    Poster: IAG Scientific Assembly 2013, Potsdam, Germany (invited); 2013-09-01 - 2013-09-06; in: "IAG Scientific Assembly", (2013), 2 pages. BibTeX, More information

  71. A. Kealy, A. Hasnur-Rabiain, N. Alam, C. Toth, D. Grejner-Brzezinska, V. Gikas, G. Retscher:
    "Cooperative Positioning Algorithms and Techniques for Land Mobile Applications";
    Talk: 8th International Symposium on Mobile Mapping Technology, Tainan, Taiwan (invited); 2013-05-01 - 2013-05-03; in: "8th International Symposium on Mobile Mapping Technology", (2013), 6 pages. BibTeX, More information

  72. G. Retscher, T. Hecht, E. Mok:
    "Location Capabilities and Performance of Smartphones for LBS Navigation Applications";
    Talk: 8th International Symposium on Mobile Mapping Technology, Tainan, Taiwan (invited); 2013-05-01 - 2013-05-03; in: "8th International Symposium on Mobile Mapping Technology", (2013), 6 pages. BibTeX, More information

  73. S. Heuböck, G. Retscher:
    "Performance of Low-cost HS-GPS Under Forest Canopy";
    Poster: European Navigation Conference ENC 2013, Wien (invited); 2013-04-23 - 2013-04-25; in: "European Navigation Conference", (2013), 3 pages. BibTeX, More information

  74. S. Niedermayr, G. Retscher, A. Wieser:
    "The Role of RFID in a Low-cost Localization System for Provision of a Complete Operational Picture on Regional Airports";
    Talk: European Navigation Conference ENC 2013, Wien (invited); 2013-04-23 - 2013-04-25; in: "European Navigation Conference 2013", (2013), 7 pages. BibTeX, More information

  75. A. Hasnur-Rabiain, A. Kealy, N. Alam, A. Dempster, C. Toth, D. Grejner-Brzezinska, V. Gikas, C. Danezis, G. Retscher:
    "Cooperative Positioning using GPS, Low-cost INS and Dedicated Short Range Communications";
    Talk: ION Pacific PNT 2013, Honolulu, Hawaii, USA (invited); 2013-04-22 - 2013-04-25; in: "ION Pacific PNT 2013", (2013), 11 pages. BibTeX, More information

  76. A. Kealy, G. Retscher, A. Hasnur-Rabiain, N. Alam, C. Toth, D. Grejner-Brzezinska, T. Moore, C. Hill, V. Gikas, C. Hide, C. Danezis, L. Bonenberg, G. Roberts:
    "Collaborative Navigation Field Trials with Different Sensor Platforms";
    Poster: 10th Workshop on Positioning, Navigation and Communication WPNC 2013, Dresden (invited); 2013-03-20 - 2013-03-21; in: "10th Workshop on Positioning, Navigation and Communication WPNC 2013", (2013), 6 pages. BibTeX, More information

  77. G. Retscher:
    "Wi-Fi Positioning with Smartphones";
    Talk: 9th International Symposium on Location-Based Services LBS 2012, München (invited); 2012-10-16 - 2012-10-18; in: "9th International Symposium on Location-Based Services LBS 2012", (2012), 1 - 9. BibTeX, More information

  78. G. Retscher:
    "KROKOGUIDE - From Crowd Analysis to Crowd Control and Individual Guidance";
    Talk: European Navigation Conference ENC 2012, Danzig, Polen (invited); 2012-04-25 - 2012-04-27; in: "European Navigation Conference ENC 2012", (2012), 1 - 12. BibTeX, More information

  79. E. Mok, G. Retscher, D. Wang, L. Xia:
    "Use of Smartphones for Tracking and Trip Recording";
    Talk: 8th International Symposium on Location-Based Services LBS 2011, Vienna; 2011-11-21 - 2011-11-23; in: "8th International Symposium on Location-Based Services LBS 2011", (2011), 16 pages. BibTeX, More information

  80. L. Xia, D. Wu, E. Mok, G. Retscher:
    "Adaptive Indoor Hybrid Positioning for LBS";
    Talk: 8th International Symposium on Location-Based Services LBS 2011, Vienna; 2011-11-21 - 2011-11-23; in: "8th International Symposium on Location-Based Services LBS 2011", (2011), 15 pages. BibTeX, More information

  81. I. Doukas, G. Retscher:
    "The Contribution of Contemporary Sensors to the Management of Natural and Manmade Disasters - The Present and the Future";
    Talk: Joint International Symposium on Deformation Monitoring, Hong Kong; 2011-11-02 - 2011-11-04; in: "Joint International Symposium on Deformation Monitoring", (2011), 11 pages. BibTeX, More information

  82. I. Doukas, G. Retscher:
    "Whereto with Earthquake Risk Management: The Resultant of Sensor-Web and Web-GIS Could Show the Way";
    Poster: 2nd International Conference on Indoor Positioning and Indoor Navigation IPIN 2011, Guimarães; 2011-09-21 - 2011-09-23; in: "Papers presented at the 2nd International Conference on Indoor Positioning and Indoor Navigation IPIN 2011", (2011). BibTeX, More information

  83. A. Kealy, G. Retscher, D. Grejner-Brzezinska, V. Gikas, G. Roberts:
    "Evaluating the Performance of MEMS based Inertial Navigation Sensors for Land Mobile Applications";
    Talk: 7th International Symposium on Mobile Mapping Technology, Krakau; 2011-06-13 - 2011-06-16; in: "7th International Symposium on Mobile Mapping Technology", (2011), 6 pages. BibTeX, More information

  84. M. Zhu, G. Retscher, K. Zhang:
    "Integrated Algorithms for RFID-based Multi-sensor Indoor/Outdoor Positioning Solutions";
    Talk: 7th International Symposium on Mobile Mapping Technology, Krakau; 2011-06-13 - 2011-06-16; in: "7th International Symposium on Mobile Mapping Technology", (2011), 7 pages. BibTeX, More information

  85. A. Kealy, C. Toth, D. Grejner-Brzezinska, G. Roberts, G. Retscher, V. Gikas:
    "A New Paradigm for Developing and Delivering Ubiquitous Positioning Capabilities";
    Talk: FIG Working Week 2011, Marrakech, Morocco; 2011-05-18 - 2011-05-22; in: "FIG Working Week 2011 - Bridging the Gaps between Cultures", (2011), 15 pages. BibTeX, More information

  86. A. Kealy, G. Roberts, G. Retscher:
    "Evaluating the Performance of Low Cost MEMS Inertial Sensors for Seamless Indoor/Outdoor Navigation";
    Talk: IEEE/ION Position, Location and Navigation Symposium PLANS 2010, Indian Wells/Palm Springs, California, USA (invited); 2010-05-04 - 2010-05-06; in: "IEEE/ION Position, Location and Navigation Symposium PLANS 2010", (2010), 11 pages. BibTeX, More information

  87. G. Retscher, Q. Fu:
    "Continuous Indoor Navigation with RFID and INS";
    Talk: IEEE/ION Position, Location and Navigation Symposium PLANS 2010, Indian Wells/Palm Springs, California, USA (invited); 2010-05-04 - 2010-05-06; in: "IEEE/ION Position, Location and Navigation Symposium PLANS 2010", (2010), 11 pages. BibTeX, More information

  88. S. Pongracz, G. Retscher:
    "Visualization of Location Fingerprints in a Positioning System based on RFID";
    Poster: Junior Scientist Conference 2010, Wien; 2010-04-07 - 2010-04-09; in: "Junior Scientist Conference", (2010), ISBN: 978-3-200-01797-9; 131 - 132. BibTeX, More information

  89. M. Zhu, K. Zhang, W. Cartwright, G. Retscher, Q. Fu:
    "Possibility studies of Integrated INS/RFID Positioning Methods for Personal Positioning Applications";
    Talk: IGNSS 2009 Conference, Gold Coast, Queensland, Australia; 2009-12-01 - 2009-12-03; in: "IGNSS 2009 Conference", (2009), 8 pages. BibTeX, More information

  90. Q. Fu, G. Retscher:
    "Integration of a RFID Time-based CoO Positioning with INS Using a Time Data Capture Tool for Verification";
    Talk: ION GNSS 2009 Conference, Savannah, Georgia, USA; 2009-09-22 - 2009-09-25; in: "ION GNSS 2009 Conference", (2009), 8 pages. BibTeX, More information

  91. G. Retscher:
    "Multi-sensor Fusion Using a Kalman Filter and Knowledge-based Systems";
    Talk: ION GNSS 2009 Conference, Savannah, Georgia, USA; 2009-09-22 - 2009-09-25; in: "ION GNSS 2009 Conference", (2009), 8 pages. BibTeX, More information

  92. A. Kealy, M. Duckham, G. Retscher, G. Roberts, S. Winter:
    "Location Information Taxonomy for Location Based Services";
    Talk: 6th International Symposium on Mobile Mapping Technology, Presidente Prudente, Sao Paolo, Brazil; 2009-07-21 - 2009-07-24; in: "6th International Symposium on Mobile Mapping Technology", (2009), 8 pages. BibTeX, More information

  93. G. Retscher, Q. Fu:
    "An Intelligent Personal Navigator Integrating GNSS, RFID and INS for Continuous Position Determination";
    Talk: 6th International Symposium on Mobile Mapping Technology, Presidente Prudente, Sao Paolo, Brazil; 2009-07-21 - 2009-07-24; in: "6th International Symposium on Mobile Mapping Technology", (2009), 8 pages. BibTeX, More information

  94. Q. Fu, G. Retscher:
    "Using RFID Technology in Pedestrian Navigation for Information Transmission and Data Communication Recording";
    Poster: Junior Scientist Conference, Wien (invited); 2008-11-16 - 2008-11-18; in: "Junior Scientist Conference", (2008), ISBN: 978-3-200-01612-5; 255 - 256. BibTeX, More information

  95. G. Retscher, Q. Fu:
    "GNSS, RFID and INS Integration for Pedestrian Navigation";
    Talk: GPS/GNSS 2008 Conference, Tokyo, Japan; 2008-11-11 - 2008-11-14; in: "GPS/GNSS 2008 Conference", (2008), 10 pages. BibTeX, More information

  96. G. Retscher, Q. Fu:
    "Active RFID Fingerprinting for Indoor Positioning";
    Talk: ION GNSS 2008 Conference, Savannah, Georgia, USA; 2008-09-16 - 2008-09-19; in: "ION GNSS 2008 Conference", (2008), 9 pages. BibTeX, More information

  97. G. Retscher, Q. Fu:
    "RFID Trilateration for Indoor and Outdoor Positioning";
    Talk: European Navigation Conference - ENC-GNSS 2008 Toulouse, Toulouse, France; 2008-04-22 - 2008-04-25; in: "Toulouse Space Show ´08 - European Navigation Conference ENC-GNSS 2008", (2008), 10 pages. BibTeX, More information

  98. G. Retscher:
    "Selected systems for Indoor and Pedestrian Navigation";
    Talk: IGNSS 2007 Conference, Sydney, Australia; 2007-12-04 - 2007-12-06; in: "IGNSS 2007 Conference", (2007), Paper ID 7, 11 pages. BibTeX, More information

  99. M. Zhu, K. Zhang, F. Wu, W. Cartwright, G. Retscher:
    "An Investigation of Pedestrian Positioning Algorithms Based on Integrated Lowcost INS; GPS and Magnetometer";
    Talk: IGNSS 2007 Conference, Sydney, Australia; 2007-12-04 - 2007-12-06; in: "IGNSS 2007 Conference", (2007), Paper ID 93, 11 pages. BibTeX, More information

  100. G. Retscher, Q. Fu:
    "Using Active RFID for Positioning in Navigation Systems";
    Talk: 4th International Symposium on Location Based Services and Telecartography, Hong Kong, PR China; 2007-11-08 - 2007-11-10; in: "4th International Symposium on Location Based Services and Telecartography", (2007), 11 pages. BibTeX, More information

  101. G. Retscher, E. Mok, L. Xia:
    "UWB, RFID and GNSS Integration for Navigation and Tracking";
    Poster: 4th International Symposium on Location Based Services and Telecartography, Hong Kong, PR China; 2007-11-08 - 2007-11-10; in: "4th International Symposium on Location Based Services and Telecartography", (2007), 12 pages. BibTeX, More information

  102. G. Retscher, Q. Fu:
    "Integration of RFID, GNSS and DR for Ubiquitous Positioning in Pedestrian Navigation";
    Talk: ION GNSS 2007 Confernece, Fort Worth, Texas, USA; 2007-09-25 - 2007-09-28; in: "ION GNSS 2007 Confernece, Institute of Navigation (Eds)", (2007), 10 pages. BibTeX, More information

  103. E. Mok, G. Retscher, L. Xia:
    "MRERA (Minimum Range Error Algorithm): RFID - GNSS Integration for Vehicle Navigation in Urban Canyons";
    Poster: 5th International Symposium on Mobile Mapping Technology, Padua; 2007-05-29 - 2007-05-31; in: "5th International Symposium on Mobile Mapping Technology", (2007), 7 pages. BibTeX, More information

  104. G. Retscher:
    "Ubiquitous Positioning Solutions for Pedestrian Navigation";
    Talk: 5th International Symposium on Mobile Mapping Technology, Padua; 2007-05-29 - 2007-05-31; in: "5th International Symposium on Mobile Mapping Technology", (2007), 250 - 256. BibTeX, More information

  105. G. Retscher, E. Mok:
    "Investigation and Testing of Location Systems Using WiFi in Indoor Environments";
    Talk: IAIN/GNSS 2006 Conference, Jeju Island, South Korea; 2006-10-18 - 2006-10-20; in: "IAIN/GNSS 2006 Conference", 2 (2006), 6 pages. BibTeX, More information

  106. G. Retscher, M. Thienelt:
    "Test and Integration of Location Sensors for Position Determination in a Pedestrian Navigation System";
    Talk: IAIN/GNSS 2006 Conference, Jeju Island, South Korea; 2006-10-18 - 2006-10-20; in: "IAIN/GNSS 2006 Conference", 1 (2006), 6 pages. BibTeX, More information

  107. E. Mok, G. Retscher, L. Xia:
    "Investigation of Seamless Indoor and Outdoor Positioning Integrateing WiFi and GNSS";
    accepted as talk for: XXIII International FIG 2006 Congress, Munich, Germany; 2006-10-08 - 2006-10-13; in: "XXIII International FIG 2006 Congress", (2006), 15 pages. BibTeX, More information

  108. L. Gang-Jun, K. Zhang, L. Densley, F. Wu, G. Retscher:
    "High Fidelity 3D Urban Model-based Signal Performance Simulation of the Current and Future GNSS in Australia";
    Talk: IGNSS 2006 Conference, Surfers Paradise, Queensland, Australia; 2006-07-17 - 2006-07-21; in: "IGNSS 2007 Conference", (2006), 230 - 239. BibTeX, More information

  109. G. Retscher, K. Zhang, S. Zhang, Y. Wang:
    "Positioning case studies using RFID and GNSS: Indoor and Outdoor";
    Talk: IGNSS 2006 Conference, Surfers Paradise, Queensland, Australia; 2006-07-17 - 2006-07-21; in: "IGNSS 2006 Conference", G. Gartner (ed.); (2006), 9 pages. BibTeX, More information

  110. G. Retscher, M. Thienelt:
    "A Multi-sensor Personal Positioning System for Combined Indoor/Outdoor Environments";
    Poster: 3rd IAG Symposium on Geodesy for Geotechnical and Structural Engineering & 12th FIG Symposium on Deformation Measurement, Baden, Austria; 2006-05-22 - 2006-05-24; in: "3rd IAG Symposium on Geodesy for Geotechnical and Structural Engineering and 12th FIG Deformation Measurement Symposium", H. Kahmen, A. Chrzanowski (ed.); (2006), ISBN: 3-950-1492-3-6; 8 pages. BibTeX, More information

  111. G. Retscher:
    "Location Determination in Indoor Environments for Pedestrian Navigation";
    Talk: IEEE/ION PLANS 2006 Conference, San Diego, California, USA; 2006-04-25 - 2006-04-27; in: "IEEE/ION PLANS 2006 Conference", (2006), 9 pages. BibTeX, More information

  112. G. Retscher, B. Moser, D. Vredeveld, D. Heberling:
    "Performance and Accuracy Test of the WLAN Positioning System ipos";
    Talk: 3rd Workshop on Positioning, Navigation and Communication WPNC 2006, Úniversity of Hannover, Germany; 2006-03-16; in: "Hannoversche Beiträge zur Nachrichtentechnik", Shaker Verlag, 0.3 (2006), ISBN: 3-8322-4862-5; 7 - 15. BibTeX, More information

  113. G. Retscher:
    "An Intelligent Multi-sensor System for Pedestrian Navigation";
    Talk: GNSS Hong Kong 2005 Conference, Hong Kong, PR China; 2005-12-08 - 2005-12-10; in: "GNSS Hong Kong 2005", (2005), Paper ID 9C-07, 8 pages. BibTeX, More information

  114. G. Retscher:
    "3-D Position Determination in a Multi-storey Building Using a Pedestrian Navigation System";
    Talk: 3rd Symposium on Location Based Services and Telecartography, Vienna, Austria; 2005-11-28 - 2005-11-30; in: "Geowissenschaftliche Mitteilungen, Schriftenreihe der Studienrichtung Vermessungswesen und Geoinformation, TU Wien", G. Gartner (ed.); Band 74 (2005), ISSN: 1811-8380; 81 - 86. BibTeX, More information

  115. G. Retscher:
    "Indoor Positioning Technologies for Personal Navigation Systems";
    Poster: International Conference on Optical 3-D Measurement Techniques VII, Vienna, Austria; 2005-10-03 - 2005-10-05; in: "Proceedings Optical 3-D Measurment Techniques VII, Vol. II", A. Grün, H. Kahmen (ed.); (2005), ISBN: 3-9501492-2-8; 383 - 388. BibTeX, More information

  116. G. Retscher, U. Mitterbauer:
    "Kinematic Trajectory Determination for Construction Machines";
    Poster: International Conference on Optical 3-D Measurement Techniques VII, Vienna, Austria; 2005-10-03 - 2005-10-05; in: "Proceedings Optical 3-D Measurement Techniques VII, Vol. II", A. Grün, H. Kahmen (ed.); (2005), ISBN: 3-9501492-2-8; 376 - 382. BibTeX, More information

  117. G. Retscher, M. Thienelt:
    "Evaluation and Test of a Digital Compass Module Employed for Heading Determination in a Pedestrian Navigation System";
    Poster: International Conference on Optical 3-D Measurement Techniques VII, Vienna, Austria; 2005-10-03 - 2005-10-05; in: "Proceedings Optical 3-D Measurement Techniques VII, Vol. II", A. Grün, H. Kahmen (ed.); (2005), ISBN: 3-9501492-2-8; 389 - 394. BibTeX, More information

  118. G. Retscher, A. Kealy:
    "Ubiquitous Positioning Technologies for Intelligent Navigation Systems";
    Poster: 2nd Workshop on Positioning, Navigation and Communication, University of Hannover, Germany, Hannover, Germany (invited); 2005-03-17 - 2005-03-18; in: "Hannoversche Beiträge zur Nachrichtentechnik", Shaker Verlag, 0.2 (2005), ISBN: 3-8322-3746-1; 99 - 108. BibTeX, More information

  119. G. Retscher, M. Thienelt:
    "NAVIO - A Navigation and Guidance Service for Pedestrians";
    Talk: GNSS Sydney 2004, International Symposium on GPS/GNSS, Sydney, Australia; 2004-12-06 - 2004-12-08; in: "GNSS Sydney 2004, International Symposium on GPS/GNSS", (2004), 12 pages. BibTeX, More information

  120. G. Retscher:
    "Pedestrian Navigation Systems and Location-based Services";
    Talk: 5th IEE International Conference on 3G Mobile Communication Technologies 3G 2004, London, UK (invited); 2004-10-18 - 2004-10-20; in: "5th IEE International Conference on 3G Mobile Communication Technologies 3G 2004", (2004), 5 pages. BibTeX, More information

  121. G. Retscher:
    "Multi-sensor Systems for Pedestrian Navigation";
    Talk: ION GNSS 2004 Conference, Long Beach, California, USA; 2004-09-21 - 2004-09-24; in: "ION GNSS 2004 Conference", (2004), 12 pages. BibTeX, More information

  122. G. Gartner, A. Frank, G. Retscher:
    "Fußgängernavigation im städtischen Umfeld - Das NAVIO-Projekt";
    Talk: Symposium Praktische Kartographie, Königslutter am Elm; 2004-05-17 - 2004-05-19; in: "Der X Faktor - Mehrwert für Geodaten und Karten", Kartographische Schriften, 9 (2004), ISBN: 3-7812-1603-9; 82 - 89. BibTeX, More information

  123. G. Retscher:
    "Multi-sensor Systems for Pedestrian Navigation and Guidance Services";
    Talk: 4th Symposium on Mobile Mapping Technology, Kunming, China; 2004-03-29 - 2004-03-31; in: "4th Symposium on Mobile Mapping Technology", (2004), 7 pages. BibTeX, More information

  124. G. Gartner, A. Frank, G. Retscher:
    "Pedestrian Navigation System in mixed indoor/outdoor environment - The NAVIO Project";
    Talk: CORP 2004 Geo-Multimedia 04, Wien; 2004-02-25 - 2004-02-27; in: "CORP 2004 GeoMultimedia 04", M. Schrenk (ed.); Selbstverlag des Instituts für EDV-gestützte Methoden in Architektur und Raumplanung, (2004), 165 - 171. BibTeX, More information

  125. G. Gartner, A. Frank, G. Retscher:
    "Pedestrian Navigation System for mixed indoor/outdoor environments";
    Talk: 2nd Symposium on Location Based Services and TeleCartography, Wien; 2004-01-28 - 2004-01-29; in: "Location Based Services & TeleCartography", G. Gartner (ed.); Geowissenschaftliche Mitteilungen, 66 (2004), 161 - 167. BibTeX, More information

  126. G. Retscher, E. Mok:
    "GPS Navigation and Guidance Systems for Construction Industry";
    Talk: Conference on Advances in Building Technology ABT 2002, Hong Kong; 2002-12-04 - 2002-12-06; in: "Conference on Advances in Building Technology", Vol II (2002), 7 pages. BibTeX, More information

  127. I. Kabashi, G. Retscher, A. Nießner:
    "High Frequent Simultaneous Observation of Zenith Angles using Video Theodolites ";
    Poster: Symposium on Geodesy for Geotechnical and Structural Engineering, Berlin; 2002-05-21 - 2002-05-24; in: "Geodesy for Geotechnical and Structural Engineering II", Berlin (2002), ISBN: 3-9501492-1-x; 528 - 530. BibTeX, More information

  128. G. Retscher, U. Egbonu:
    "3-D Blade Guidance and Control Systems for Construction Machines";
    Talk: Symposium on Geodesy for Geotechnical and Structural Engineering, Berlin; 2002-05-21 - 2002-05-24; in: "Geodesy for Geotechnical and Structural Engineering II", Berlin (2002), ISBN: 3-9501492-1-x; 539 - 540. BibTeX, More information

  129. G. Retscher, W. Leitner:
    "Kinematic Trajectory Determination of MMS (Mobile Mapping Systems): Results of Simulation Studies";
    Poster: Symposium on Geodesy for Geotechnical and Structural Engineering, Berlin; 2002-05-21 - 2002-05-24; in: "Geodesy for Geotechnical and Structural Engineering II", Berlin (2002), ISBN: 3-9501492-1-x; 535 - 538. BibTeX, More information

  130. G. Retscher:
    "Multi-Sensor Systems for Machine Guidance and Control";
    Talk: XXII International Congress FIG 2002, Washington DC; 2002-04-19 - 2002-04-26; in: "XXII FIG International Conference", American Society for Photogrammetrie and Remote Sensing, (2002). BibTeX, More information

Talks and Poster Presentations (without Proceedings-Entry)

  1. G. Retscher:
    "Introduction to the LBS2ITS Erasmus+ Project";
    Talk: GEOWeek at the Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka (invited); 2021-11-29 - 2021-12-03. BibTeX,

  2. G. Retscher:
    "Wi-Fi Positioning Techniques for Challenging Indoor, Transitional and Urban Environments";
    Talk: AUTeC - Asociazione Universitari di Topografia e Cartografia, Italy (invited); 2021-11-05. BibTeX,

  3. G. Retscher:
    "Covid-19 Contact Tracing Apps - Is Bluetooth a Reliable Technique for Distance Estimation";
    Keynote Lecture: GIS Ostrava 2021 - Advances in Localization and Navigation, Ostrava, Czech Republic (invited); 2021-03-17 - 2021-03-19. BibTeX,

  4. G. Retscher:
    "Techniques and Systems for Wi-Fi Positioning";
    Talk: GIS Ostrava 2021 - Advances in Localization and Navigation, Ostrava, Czech Republic (invited); 2021-03-17 - 2021-03-19. BibTeX, More information

  5. G. Retscher:
    "Indoor-Positionierung - Stand der Technik und aktuelle Forschung an der TU Wien";
    Keynote Lecture: Intergeo 2020 Digital, Deutschland (invited); 2020-10-13 - 2020-10-15. BibTeX, More information

  6. G. Retscher:
    "Wi-Fi Positioning for Ubiquitous PNT in Challenging Urban, Transitional and Indoor Environments";
    Talk: Free seminar: How to make WiFi reliant apps work in challenging urban environments, Wollongong, Australia (invited); 2020-02-10. BibTeX, More information

  7. G. Retscher:
    "Smartphone Positioning with Signals-of-Opportunity";
    Keynote Lecture: International Global Navigation Satellite Systems (IGNSS) 2020, Sydney, Australia (invited); 2020-02-05 - 2020-02-07. BibTeX, More information

  8. G. Retscher:
    "Wi-Fi Positioning in Challenging Urban, Transitional and Indoor Environments";
    Talk: Guest Lecture at the Institute of Geodesy of the University of Warmia and Mazury, Olsztyn, Polen (invited); 2019-11-15. BibTeX,

  9. J. Rajavarathan, T. Dammalage, G. Retscher:
    "Comparative Performance Analysis of GAGAN and Trimble RTX Satellite Based Augmentation Systems over Sri Lanka";
    Talk: 7th International Conference of Sabaragamuwa University of Sri Lanka on Frontier Technologies for a Sustainable Future, Belihuloya, Sri Lanka (invited); 2019-11-14 - 2019-11-15. BibTeX, More information

  10. G. Retscher:
    "State-of-the-art, Challenges and Perspectives for Indoor PNT Applications";
    Keynote Lecture: Conference on Researches, Results and Reviews in Geomatics (R3 in Geomatics), Naples, Italy (invited); 2019-10-10 - 2019-10-11. BibTeX, More information

  11. G. Retscher:
    "Wi-Fi Positioning for Seamless and Ubiquitous PNT for Urban, Transitional and Indoor Environments";
    Talk: Guest Lecture at the Department of Geomatics of the Indian Institute of Technology Kanpur, Kanpur, India (invited); 2019-07-11. BibTeX, More information

  12. G. Retscher:
    "Wi-Fi Positioning in Challenging Urban, Transitional and Indoor Environments";
    Talk: Guest Lecture at the GIS Cell of Motilal Nehru Institute of Technology (MNNIT), Allahabad, India (invited); 2019-07-09. BibTeX,

  13. G. Retscher, V. Gikas, H. Perakis, H. Hofer, A. Kealy:
    "Evaluation of UWB and Wi-Fi Cooperative Localization Perform ance in Indoor Environments";
    Talk: 27th IUGG General Assembly, Montreal, Canada (invited); 2019-07-08 - 2019-07-18. BibTeX, More information

  14. G. Retscher, A. Kealy, V. Gikas, J. Gabela, S. Goel, Y. Li, A. Masiero, C. Toth, H. Perakis, W. Błaszczak-Bąk, Z. Koppanyi, D. Grejner-Brzezinska:
    "A Benchmarking Measurement Campaign to Support Ubiquitous Cooperative Platform Localization in GNSS Denied and Indoor Environments";
    Talk: 27th IUGG General Assembly, Montreal, Canada (invited); 2019-07-08 - 2019-07-18. BibTeX, More information

  15. G. Retscher:
    "Wi-Fi Positioning for Urban, Transitional and Indoor Environments";
    Talk: Guest Lecture at the Faculty of Urban Planning and the Faculty of Transportation of Moratuwa University, Colombo, Sri Lanka (invited); 2019-07-05. BibTeX,

  16. G. Retscher:
    "Positioning with Signals-of-Opportunity in Challenging Transitional and Indoor Environments";
    Talk: Guest Lecture at the Faculty of Geomatics of Sabaragamuwa University of Sri Lanka, Belihuloya, Sri Lanka (invited); 2019-07-02. BibTeX,

  17. G. Retscher, A. Kealy:
    "Positioning with Signals-of-Opportunity in Indoor and Transitional Environments";
    Talk: 11th International Conference on Mobile Mapping Technology 2019, Shenzhen, China (invited); 2019-05-06 - 2019-05-08. BibTeX, More information

  18. G. Retscher:
    "Urban and Indoor Wi-Fi Positioning for Routing of Public Transport Users";
    Talk: 1st Symposium on Location Based Services, Xiamen, China (invited); 2019-05-03. BibTeX, More information

  19. G. Retscher:
    "Indoor Positioning in Multi-modal Transit Situations based on Differential Wi-Fi and Inertial Navigation";
    Talk: IE Seminar at The University of Melbourne, Melbourne, Australia (invited); 2018-05-25. BibTeX, More information

  20. G. Retscher:
    "Differential Wi-Fi - A New Opportunity for Localization of Individuals and Groups of Smartphone App Users";
    Talk: Curtin Spatial Science Colloquium 2018, Perth, Australia (invited); 2018-04-05. BibTeX, More information

  21. G. Retscher:
    "Cooperative Positioning of User Groups in Multi-modal Transit Situations Based on Differential Wi-Fi and Inertial Navigation";
    Talk: 5th International Conference Ubiquitous Positioning Indoor Navigation and Location Based Service UPINLBS, Wuhan, China (invited); 2018-03-22 - 2018-03-23. BibTeX,

  22. G. Retscher:
    "Indoor-Positionierung: Stand der Technik und aktuelle Forschung";
    Talk: OVG Vorträge Wien, Wien (invited); 2017-12-20. BibTeX,

  23. G. Retscher:
    "Novel Technological Developments for Indoor Wi-Fi Positioning";
    Talk: Geospatial Forum, School of Science, RMIT University, Melbourne, Australien (invited); 2017-11-03. BibTeX, More information

  24. G. Retscher:
    "Localization Using Wi-Fi - Challenges and Perspectives";
    Keynote Lecture: Indoor3D Workshop of the ISPRS Geospatial Week, Wuhan, China (invited); 2017-09-19 - 2017-09-20. BibTeX, More information

  25. G. Retscher:
    "Research in the Field of Indoor Localization at TU Wien";
    Talk: Guest Lecture at the School of Environment Science and Spatial Informatics of the Chinese University of Mining and Technologies (CUMT), Xuzhou, China (invited); 2017-09-14. BibTeX, More information

  26. G. Retscher:
    "Research in the Field of Indoor Localization at TU Wien";
    Talk: Guest Lecture at the Institute of Computing Technology of the Chinese Academy of Sciences, Beijing, China (invited); 2017-09-12. BibTeX, More information

  27. G. Retscher, H. Hofer, A. Kealy, V. Gikas, A. Ettlinger, F. Obex:
    "Constrained Differential Wi-Fi and UWB Measurements for Indoor Cooperative User Localization";
    Talk: IAG-IASPEI Joint Scientific Assembly, Kobe, Japan (invited); 2017-07-30 - 2017-08-04. BibTeX, More information

  28. G. Retscher:
    "Research Activities on Pedestrian Navigation at TU Wien";
    Talk: Guest Lecture at the Department of Civil Engineering of the University of Nottingham Ningbo, Ningbo, China (invited); 2016-12-22. BibTeX, More information

  29. G. Retscher, F. Roth:
    "Wi-Fi Fingerprinting with Reduced Signal Strength Observations from Long-time Measurements";
    Talk: 13th International Symposium on Location-Based Services LBS 2016, Wien (invited); 2016-11-14 - 2016-11-16. BibTeX, More information

  30. G. Retscher:
    "Indoor Localization Technologies Using Wi-Fi Based on Fingerprinting and Trilateration and in Combination with RFID";
    Talk: Guest Lecture at the School of Information Science and Engineering of Xiamen University, China, Xiamen (invited); 2016-10-28. BibTeX, More information

  31. G. Retscher:
    "Research Activities on Pedestrian Navigation and Ubiquitous Positioning at TU Wien";
    Talk: Guest Lecture at the Department of Civil Engineering and Geomatics of Cyprus University of Technology, Limassol (invited); 2016-09-22. BibTeX,

  32. A. Kealy, V. Gikas, G. Retscher:
    "Recent Developments on Multi-Sensor Systems within the IAG as a Driver for Robust Positioning and Navigation";
    Talk: IAG Commission 4 Symposium, Wroclaw, Polen (invited); 2016-09-04 - 2016-09-07. BibTeX, More information

  33. G. Retscher:
    "Novel Indoor Localization Technologies Using Wireless Fidelity (Wi-Fi)";
    Talk: LSGI Distinguished Lecture Series, Hong Kong (invited); 2016-05-14. BibTeX, More information

  34. G. Retscher:
    "Overview of In-/Outdoor Positioning Methods using RFID";
    Talk: EMPARCO Workshop, Athen, Griechenland (invited); 2015-07-07. BibTeX,

  35. G. Retscher:
    "Differential Wi-Fi - A New Approach for Wi-Fi Positioning Using Lateration";
    Talk: IUGG 2015 General Assembly, Prag (invited); 2015-06-22 - 2015-07-02. BibTeX, More information

  36. G. Retscher:
    "Ist Collaborative Positioning eine geeignete Lösung bei GNSS Beeinträchtigungen?";
    Talk: Symposium der Fa. Geodäsie Austria, St. Ulrich bei Steyr (invited); 2014-01-30 - 2014-01-31. BibTeX, More information

  37. M. Gunawan, B. Li, T. Gallagher, A. Dempster, G. Retscher:
    "A New Method to Generate and Maintain a WiFi Fingerprinting Database Automatically by Using RFID";
    Talk: 3rd International Conference on Indoor Positioning and Indoor Navigation IPIN 2012, Sydney (invited); 2012-11-13 - 2012-11-15. BibTeX, More information

  38. A. Kealy, G. Retscher, N. Alam, A. Hasnur-Rabiain, C. Toth, D. Grejner-Brzezinska, T. Moore, C. Hill, V. Gikas, C. Hide, C. Danezis, L. Bonenberg, G. Roberts:
    "Collaborative Navigation with Ground Vehicles and Personal Navigators";
    Talk: 3rd International Conference on Indoor Positioning and Indoor Navigation IPIN 2012, Sydney (invited); 2012-11-13 - 2012-11-15. BibTeX, More information

  39. G. Retscher, T. Hecht:
    "Investigation of Location Capabilities of four Different Smartphones for LBS Navigation Applications";
    Talk: 3rd International Conference on Indoor Positioning and Indoor Navigation IPIN 2012, Sydney (invited); 2012-11-13 - 2012-11-15. BibTeX, More information

  40. G. Retscher:
    "Wi-Fi Positioning with Smartphones";
    Talk: 9th International Symposium on Location-Based Services LBS 2012, München (invited); 2012-10-16 - 2012-10-18. BibTeX, More information

  41. E. Mok, G. Retscher, C. Wen:
    "Initial Test on the Use of GPS and Sensor Data of Modern Smartphones for Vehicle Tracking in Dense High Rise Environments";
    Poster: 2nd International Conference on Ubiquitous Positioning, Indoor Navigation and Location-Based Service UPINLBS 2012, Helsinki (invited); 2012-10-03 - 2012-10-04. BibTeX, More information

  42. G. Retscher:
    "Smartphone Positioning and Navigation in LBS";
    Talk: Seminar at the UNSW Sydney, Sydney (invited); 2012-02-29. BibTeX, More information

  43. G. Retscher:
    "Covid-19 Contact Tracing Apps - Is Bluetooth a Reliable Technique for Distance Estimation?";
    Keynote Lecture: GIS Ostrava 2021 - Advances in Localization and Navigation, Ostrava, Czech Republic (invited); 2012-01-23 - 2012-01-25. BibTeX,

  44. J. Peng, M. Zhu, K. Zhang, G. Retscher:
    "New Algorithms Based on Sigma Point Kalman Filter Technique for Multi-sensor Integrated RFID Indoor/Outdoor Positioning";
    Talk: 2nd International Conference on Indoor Positioning and Indoor Navigation IPIN 2011, Guimarães; 2011-09-21 - 2011-09-23. BibTeX, More information

  45. D. Grejner-Brzezinska, G. Retscher, C. Toth:
    "Application of Artificial Intelligence and Multi-sensor Systems in Navigation and Engineering Geodesy";
    Poster: IUGG 2011 Conference Earth on the Edge - Science for a Sustainable Planet, Melbourne; 2011-06-28 - 2011-07-07. BibTeX, More information

  46. G. Retscher, A. Kealy:
    "Indoor Navigation on the Edge - Report of IAG WG 4.1.2.";
    Poster: IUGG 2011 Conference Earth on the Edge - Science for a Sustainable Planet, Melbourne; 2011-06-28 - 2011-07-07. BibTeX, More information

  47. G. Retscher, G. Mentes, A. Reiterer:
    "Earth on the Edge - Applications of Geodesy in Engineering";
    Talk: IUGG 2011 Conference Earth on the Edge - Science for a Sustainable Planet, Melbourne; 2011-06-28 - 2011-07-07. BibTeX, More information

  48. G. Retscher:
    "Aktuelle Forschung im Bereich Indoor-Navigation an der TU Wien";
    Talk: Geodätisches Kolloquium, Karlsruhe; 2009-12-17. BibTeX, More information

  49. G. Retscher:
    "Mobile Multisensorsysteme in der Persönlichen Navigation und für Location Based Services";
    Talk: Habilitationskolloquium, Wien; 2009-04-27. BibTeX,

  50. G. Retscher:
    "Research in the Field of Indoor and Pedestrian Navigation at the Vienna University of Technology";
    Talk: Seminar at the RMIT University Melbourne, Victoria, Australia, Melbourne, Victoria, Australia (invited); 2008-02-29. BibTeX, More information

  51. G. Retscher:
    "Erstellung eines österreichischen Konzepts für die Optimierung der Vermessungsleistung der ÖBB-Dienstleistungs GmbH";
    Talk: Vortragsreihe im Rahmen eines wissenschaftlichen Projektes, Wien; 2007-09-03 - 2007-09-07. BibTeX,

  52. G. Retscher:
    "Research in the Field of Indoor and Pedestrian Navigation at the Research Group Engineering Geodesy at the Vienna University of Technology";
    Poster: 24. IUGG General Assembly, Perugia; 2007-07-02 - 2007-07-13. BibTeX, More information

  53. G. Retscher:
    "Aktuelle Forschung im Bereich Fußgängernavigation in Gebäuden und im städtischen Umfeld an der TU Wien";
    Talk: Geodätisches Kolloquium am Departement Geomatik an der HafenCity Universität Hamburg, Hamburg (invited); 2007-06-27. BibTeX, More information

  54. G. Retscher:
    "NAVIO - An Intelligent Multi-sensor System for Pedestrian Navigation in Combined Outdoor/Indoor Environments";
    Talk: Seminar of the School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, South Korea (invited); 2006-10-16. BibTeX, More information

  55. G. Retscher:
    "Von Geodätisch Rechnen zu Location Based Services - Moderne Tätigkeitsfelder des Geodäten";
    Talk: 20-jähriges Treffen des Studienganges Vermessungswesen 1986 an der Technischen Universität Wien, Wien; 2006-10-07. BibTeX,

  56. G. Retscher:
    "Overview about Current Research at the Engineering Geodesy Research Group of the Vienna University of Technology";
    Talk: Seminar at the Insitute of Engineering Surveying and Space Geodesy of the Nottingham University, Nottingham, UK, Nottingham, UK (invited); 2006-09-29. BibTeX,

  57. I. Kabashi, G. Retscher:
    "High frequent simultaneous zenith angle observations using video theodolites for deformation monitoring";
    accepted as talk for: International Conference "Dynamic Planet 2005" (IAG), Cairns, Australia; 2005-08-22 - 2005-08-26. BibTeX, More information

  58. G. Retscher:
    "Das NAVIO Projekt";
    Talk: Vortragsreihe am Institut für Nachrichtentechnik und Hochfrequenztechnik der TU Wien, Vienna, Austria (invited); 2005-07-05. BibTeX, More information

  59. G. Retscher:
    "Location Based Services (LBS) und persönliche Navigation";
    Talk: Vortragsreihe anlässlich des Besuches der Fachhochschule Bochum, Institut für Geodäsie und Geophysik, TU Wien; 2005-05-09. BibTeX,

  60. G. Retscher:
    "Multisensorsysteme in der Navigation und für ortsbezogene Dienste";
    Talk: Bewerbungsvortrag für die Professur Positionierung und Navigation an der Universität Hannover, Hannover, Germany (invited); 2005-04-21. BibTeX,

  61. G. Retscher:
    "Multi-sensor Systems for Indoor and Pedestrian Navigation";
    Talk: Seminar of the Department of Geomatics, The University of Melbourne, Victoria, Australia (invited); 2004-12-15. BibTeX, More information

  62. G. Retscher:
    "Multisensorsysteme in der Navigation und für Location Based Services";
    Talk: Geodätisches Kolloquium an der Technischen Universität Berlin, Berlin, Germany (invited); 2004-12-01. BibTeX, More information

  63. G. Retscher:
    "The NAVIO Project at the Vienna University of Technology, Austria - A Pedestrian Navigation System for Combined Indoor and Outdoor Environments";
    Talk: Seminar of the Department of Civil and Environmental Engineering and Geodetic Science, The Ohio State University, Columbus, Ohio, USA (invited); 2004-09-29. BibTeX, More information

  64. G. Retscher:
    "Indoor and Pedestrian Navigation (IAG WG 4.1.2)";
    Talk: Workshop on Location-based Technologies, Services and Applications; European Commission, Information Society Technologies, Directorate D-Communication Networks, Security & Software. Applications, Unit D1 - Communication and Network Technologies, Bruessel, Belgium (invited); 2004-03-08. BibTeX,

  65. G. Retscher:
    "Mobile Navigationssysteme auf der Basis von Location Based Services (LBS)";
    Talk: Universitätslehrgang Verkehrstelematik-Management, Donau-Universität Krems, Österreich (invited); 2003-09-24. BibTeX, More information

  66. G. Retscher:
    "Konzepte mobiler Navigationssysteme auf der Basis von LBS (Location Based Services)";
    Talk: GeoPo 2002 Workshop on Location-Based Services and Mobile Navigation, Podersdorf; 2002-06-25 - 2002-06-26. BibTeX,

  67. G. Retscher:
    "Performance Analysis of an Expensive and a Low-Cost Digital Compass";
    Talk: XXII International Congress FIG 2002, Washington; 2002-04-19 - 2002-04-26. BibTeX,

  68. G. Retscher:
    "Diskussion der Leistungsmerkmale von Systemen zur Positionsbestimmung mit Mobiltelefonen als Basis für Location Based Services (LBS)";
    Talk: Symposium für Telekartographie, Wien; 2002-01-28 - 2002-01-29. BibTeX, More information

Diploma and Master Theses (authored and supervised)

  1. A. Ettlinger:
    "Einsatzfähigkeit des Erdmagnetfeldes in Kombination mit WLAN und RFID für Indoor-Positionierungsverfahren";
    Supervisor: G. Retscher; E120-5 Ingenieurgeodäsie, 2016; final examination: 2016-03-07. BibTeX, More information

  2. H. Hofer:
    "Kombinierte Indoor/Outdoor Positionierung mit Smartphones";
    Supervisor: G. Retscher; E120-5 Ingenieurgeodäsie, 2016; final examination: 2016-01-12. BibTeX, More information

  3. T. Tatschl:
    "Indoor Positionierung mit di erenziellem WLAN";
    Supervisor: G. Retscher; E120-5 Ingenieurgeodäsie, 2016; final examination: 2016-01-11. BibTeX, More information

  4. S. Heuböck:
    "Grenzen und Anwendbarkeit der Positionsbestimmung mittels HS-GPS im Wald";
    Supervisor: G. Retscher; E120-5, 2014; final examination: 2014-06-02. BibTeX, More information

  5. S. Pongracz:
    "Positionierung mit RFID unter besonderer Berücksichtigung kinematischer Methoden";
    Supervisor: G. Retscher; E128-3, 2010; final examination: 2010-01-18. BibTeX, More information

  6. E. Moser:
    "Genauigkeits- und Leistungstest eines WLAN Indoor Positionierungssystems";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2006; final examination: 2006-10-16. BibTeX, More information

  7. C. Hiller:
    "Test und Integration von Sensoren für die Positionsbestimmung in ein Fußgängernavigationssystem";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2006; final examination: 2006-10-09. BibTeX, More information

  8. M. Kistenich:
    "Indoor Positioning: Vergleich von Systemen zur Positionsbestimmung und Navigation in Gebäuden";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2005. BibTeX, More information

  9. E. Abreu Benito:
    "Planning and Setting up of a DGPS Service for Navigation Application";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2004. BibTeX, More information

  10. U. Nsimba:
    "Steuerung von Maschinen im Straßenbau";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2004. BibTeX, More information

  11. S. Raykova:
    "Test der Leistungsfähigkeit eines DGPS-Navigationsdienstes";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2004. BibTeX,

  12. H. Skorpil:
    "Strategien zur A-priori-Analyse von GPS-Netzen";
    Supervisor: M. Haberler-Weber, G. Retscher; Institut für Geodäsie und Geophysik, 2003. BibTeX, More information

  13. P. Anzinger:
    "Analyse des Referenzstationsnetzes von Wienstrom auf der Basis bereits entwickelter lokaler GNSS-Referenzstationsnetze";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2002. BibTeX, More information

  14. W. Leitner:
    "Kinematische Aufnahme von Verkehrsstraßen mit Mobile Mapping Systemen";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2002. BibTeX, More information

  15. G. Skolaut:
    "Untersuchung von Messsensoren zum Einsatz in Navigationssystemen für Fußgänger";
    Supervisor: G. Retscher; Institut für Geodäsie und Geophysik, 2002. BibTeX, More information

Scientific Reports

  1. A. Kealy, G. Retscher, J. Gabela, Y. Li, S. Goel, C. Toth, A. Masiero, W. Błaszczak-Bąk, V. Gikas, H. Perakis, Z. Koppanyi, D. Grejner-Brzezinska:
    "A Benchmarking Measurement Campaign in GNSS-denied/Challenged Indoor/Outdoor and Transitional Environments";
    Report for International Federation of Surveyors (FIG) Article of the Month; Report No. July/August, 2019; 19 pages. BibTeX, More information

  2. V. Gikas, H. Perakis, A. Kealy, G. Retscher, C. Antoniou, T. Mpimis:
    "Indoor Parking Facilities Management Based on RFID CoO Positioning in Combination with Wi-Fi and UWB";
    Report for International Federation of Surveyors (FIG) Article of the Month; Report No. October, 2017; 16 pages. BibTeX, More information



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