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Original Articles

First results of mixed GPS+GIOVE single-frequency RTK in Australia

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Pages 3-18 | Published online: 18 Jun 2012
 

Abstract

First results are presented for precise (mm/cm-level) short-baseline RTK positioning based on single-frequency GPS data combined with data of GIOVE-A/B, the two experimental Galileo satellites, collected in Australia. The paper first focuses on the model of GPS+Galileo observation equations and addresses the issues that arise when combining data of both systems, in particular the inter-system biases (ISBs). Our results indicate that the differential ISBs are quite stable in time, potentially enabling calibration and a priori correction of the Galileo phase and code observations. Based on ISB-corrected data, the reliability of single-frequency GPS+GIOVE ambiguity resolution is significantly improved, when compared to GPS only.

Acknowledgements

This work has been executed in the framework of the Positioning Program Project 1.01 (New carrier phase processing strategies for achieving precise and reliable multi-satellite, multi-frequency GNSS/RNSS positioning in Australia) of the Cooperative Research Centre for Spatial Information (CRC-SI). Peter J.G. Teunissen is the recipient of an Australian Research Council (ARC) Federation Fellowship (project number FF0883188). All this support is gratefully acknowledged.

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