Analysis of Biases Influencing Successful Rover Positioning with GNSS-Network RTK

Hans-Jürgen Euler, Stephan Seeger, Frank Takac

Leica Geosystems AG, Heinrich-Wild-Strasse, CH-9435 Heerbrugg (Switzerland).

DOI:                 

Abstract

Using the Master-Auxiliary concept, described in Euler et al. (2001), Euler and Zebhauser (2003) investigated the feasibility and benefits of standardized network corrections for rover applications. The analysis, focused primarily in the measurement domain, demonstrated that double difference phase errors could be significantly reduced using standardized network corrections. Extended research investigated the potential of standardized network RTK messages for rover applications in the position domain (Euler et al, 2004-I). The results of baseline processing demonstrated effective, reliable and homogeneous ambiguity resolution performance for long baselines (>50km) and short observation periods (>45 sec). In general horizontal and vertical position accuracy also improved with the use of network corrections. This paper concentrates on the impact of wrongly determined integers within the reference station network on RTK performance. A theoretical study using an idealized network of reference stations is complemented by an empirical analysis of adding incorrect L1 and L2 ambiguities to the observations of a real network. In addition, the benefits of using network RTK corrections for a small sized network in Asia during a period of high ionospheric activity is also demonstrated.

Keywords

Master-Auxiliary concept, dispersive errors, non-dispersive errors, approximation, influence of wrong ambiguities.

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	CODE data archive, ftp://ftp.unibe.ch/aiub/CODE/
[2]	Euler, H.-J., Keenan, C.R., Zebhauser, B. E., Wübbena, G. (2001) Study of a Simplified Approach in Utilizin Information from Permanent Reference Station Arrays, ION GPS 2001, September 11-14, 2001, Salt Lake City, UT
[3]	Euler, H.-J., Zebhauser, B. E., Townsend, B., Wübbena, G. (2002) Comparison of Different Proposals for Reference Station Network Information Distribution Formats, ION GPS 2002, September 24-27, 2002, Portland, OR
[4]	Euler, H.-J., Zebhauser, B.E. (2003) The Use of Standardized Network RTK Messages in Rover Applications for Surveying, ION NTM 2003, January 22-24, 2003, Anaheim, CA
[5]	Euler, H.-J., Seeger, S., Zelzer, O., Takac, F., Zebhauser, B. E. (2004-I) Improvement of Positioning Performance Using Standardized Network RTK Messages, ION NTM 2004, January 26-28, 2004, San Diego, CA
[6]	Euler, H.-J., Seeger, S., Takac, F. (2004-II) Influence of Diverse Biases on Network RTK, ION GNSS 2004, Long Beach, CA
[7]	RTCM (2004) RTCM Recommended Standards for Differential GNSS (Global Navigation Satellite Systems) Service, Version 3.0, RTCM paper 30-2004-SC104-STD.
[8]	Zebhauser, B. E., Euler, H.-J., Keenan, C.R., Wübbena, G. (2002) A Novel Approach for the Use of Information from Reference Station Networks Conforming to RTCM V2.3 and Future V3.0, ION NTM 2002, January 28-30, 2002, San Diego, CA.