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Volume 52 Supplement 10

Special Issue: Application of GPS and other space geodetic techniques to Earth Sciences (1)

Experiences in set-up and usage of a geodetic real-time differential correction network

Abstract

Global Navigation Satellite Systems (GNSS) are commonly used for geodetic and land surveying applications. The stand alone accuracy provided by these GNSS are insufficient for the majority of these operations (GPS, 1995), therefore some form of differential correction method is required. Accordingly, the state survey offices of Germany have installed a differential correction service for geodetic applications. Code- and phase-corrections are broadcast in the VHF-band using the RTCM V2.1 format (RTCM, 1994). One major problem is that the accuracy depends on the distance to a reference station (length of baseline) because of residual orbit and atmospheric biases. To achieve a more precise solution, a number of reference stations are connected together to form a network. Within this network these influences are computed and a set of “area correction parameters” are also transmitted in RTCM message Type 59. Field trials and measurements have confirmed the high accuracy of this service. This paper describes the system itself, investigations of communication methods as well as site planning. In addition measurements from field trials will be presented to demonstrate the high accuracy in a real-time environment.

References

  1. Augath, W. and C.-H. Jahn, The High-Precision Positioning Service (HPPS) and its Application in Cadastral Surveying in Germany, Proceedings of 21. FIG Meeting in Brighton, Commission 5, pp. 9–19, 1998.

    Google Scholar 

  2. Froehlich, M., Zur Entwicklung eines Hochpraezisen Permanenten Positionierungsservice (HPPS), Wiss. Arb. d. Fachr. Vermessungswesen der UNI Hannover Nr. 211, 1995.

  3. Geiger, A., Modeling of phase center variation and its influence on GPS-Positioning, Intern. GPS-Workshop Darmstadt, April 1998.

  4. GEO++, Product information of the software module GNNET and GNREF, 1997.

  5. GPS, Global Positioning System: Standard Positioning Service Signal Specification, 2. Rev., July 1995.

  6. Jahn, C.-H., Der hochpraezise permanente Positionierungs-Service (HPPS), Ortung und Navigation 1/1997, pp. 48–73, 1997.

    Google Scholar 

  7. Jahn, C.-H. and U. Feldmann-Westendorf, SAPOS für Liegenschaftsvermessungen, Proceedings of the 2nd SAPOS Symposium, Berlin, 1999. LGN, Landesvermessung und Geobasisinformation Niedersachsen, http://www.lgn.de, 1999.

  8. Menge, F., G. Seeber, C. Voelksen, G. Wuebbena, and M. Schmitz, Results of Absolute Field Calibration of GPS Antenna PCV, Proceedings of the ION GPS 98, Nashville, U.S.A., pp. 31–38, 1998.

    Google Scholar 

  9. RTCM Recommended Standards for Differential GNSS Service, Version 2.1, RTCM Special Committee No. 104, Alexandria, 1994.

  10. Spectra, Spectra Precision Terrasat GmbH: Product Information, 1998. Wanninger, L., Improved Ambiguity Resolution by Regional Differential Modelling of the Ionosphere, Proceedings of the ION GPS 95, Palm Springs, pp. 55–62, 1995.

  11. Wanninger, L., The Performance of Virtual Reference Stations in Active Geodetic GPS-networks under Solar Maximum Conditions, Proceedings of the ION GPS 99, Nashville, pp. 1419–1427, 1999.

    Google Scholar 

  12. Wuebbena, G., A. Bagge, G. Seeber, V Boeder, and P. Hankemeier, Reducing Distance Dependent Errors for Real-Time Precise DGPS Applications by Establishing Reference Station Networks, Proceedings of the ION GPS 96, Kansas City, pp. 1845–1852, 1996a.

  13. Wuebbena, G., F. Menge, M. Schmitz, G. Seeber, and C. Voelksen, A New Approach for field calibration of absolute antenna phase center variations, Proceedings of the ION GPS 96, Kansas City, pp. 1205–1214, 1996b.

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Correspondence to Sven Martin.

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Martin, S., Jahn, CH. Experiences in set-up and usage of a geodetic real-time differential correction network. Earth Planet Sp 52, 851–855 (2000). https://doi.org/10.1186/BF03352294

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Keywords

  • Global Navigation Satellite System
  • Reference Station
  • Global Navigation Satellite System
  • Ambiguity Resolution
  • Real Time Kinematic