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The generation of virtual reference station observations to relay the corrections to the rover receiver for use with standard
RTK software is one of important architectures of reference station networks RTK positioning. The approach of virtual
observations generation based on a multi-reference GPS station network is presented in this paper. Ambiguities for the
baselines in the reference network are determined firstly. The inter-reference-station differential spatially-correlated
errors are estimated using highly accurate coordinates of the reference stations and resolved ambiguities. These
spatially-correlated errors are interpolated among the network region as corrections. These network-generated
corrections are used to correct the zero-differential observables of one reference station, which is usually the closest one
to the rover (the so-called primary reference station). These corrected zero-differential observables, named virtual
observations, are processed using conventional single reference station differential GPS algorithms. A test conducted
using regional reference networks in Jiangsu(China) demonstrates the effectiveness of the approach to reduce the time to
integer ambiguity resolution, and to increase the distance over which centimeter level accuracies can be achieved.
Guorong Yu
"Approach of virtual observations generation of a multi-reference GPS
station network", Proc. SPIE 6795, Second International Conference on Space Information Technology, 679546 (10 November 2007); https://doi.org/10.1117/12.774556
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Guorong Yu, "Approach of virtual observations generation of a multi-reference GPS station network," Proc. SPIE 6795, Second International Conference on Space Information Technology, 679546 (10 November 2007); https://doi.org/10.1117/12.774556