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GPS Solutions

, Volume 10, Issue 2, pp 136–145 | Cite as

Absolute calibration of GPS antennas: laboratory results and comparison with field and robot techniques

  • B. GörresEmail author
  • J. Campbell
  • M. Becker
  • M. Siemes
Original Article

Abstract

A critical assessment of the accuracy of GPS antenna calibration is most effectively done by comparison between different calibration methods. We present new chamber calibrations of five different GPS receiver antenna types in an anechoic chamber and a comparison of an individual antenna calibrated by the absolute field calibration technique with robot mount of IfE/GEO++. The accuracy is described using standard error parameters which allow the characterization of the quality of different antennas. The results validate the absolute calibration methods at the 1-mm level and confirm the presence of significant variations in quality between antennas of different design. For the antenna pattern we directly use the measured phase variations and do not have to fit any functions for the chamber calibrations. We include the results of an earlier test made with a set of identical antennas calibrated at five different institutions: two using the absolute field technique with robot mount and three others applying the standard field calibration with reference antenna.

Keywords

Anechoic Chamber Antenna Phase Center Chamber Calibration Reference Antenna Phase Center Variation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Notes

Acknowledgements

We are grateful for the occasion to use the anechoic test chamber of the “Technical Center for Information Technology and Electronics” in Greding/Germany (WTD81 of the FAF) and for providing the Leica AT303 antenna by the Bavarian State Survey Department, Munich. The robot data were kindly made available by the company Geo++.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Geodätisches Institut der Universität BonnBonnGermany
  2. 2.Institut für Physikalische Geodäsie der Technischen Universität DarmstadtDarmstadtGermany

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