The impacts of different satellite antenna parameters on BDS precise orbit determination and precise point positioning accuracy

doi:10.11947/j.AGCS.2019.20180226

Abstract

Abstract: The necessity that the satellite antenna parameters used in BDS PPP should be consistent with the satellite orbit and clock products is demonstrated. Based on four groups of satellite antenna parameters BDS precise orbit inner accuracy in RTN three-way, GEO satellites are all around 9.3、18.6、11.5 cm, IGSO satellites are around 1.7、4.2、2.7 cm, MEO satellites are about 2.1、5.1、4.8 cm, the difference of the orbit determination accuracy in the R direction is less than 5 mm, and the maximum difference in the TN direction is 2.4 cm. Compared with the GFZ's post precision products, the outer accuracy of RTN is significantly different, excluding the factors of the difference orbit determination strategy with GFZ in GEO, the IGSO and MEO orbit precision are similar between ESA and WHU, and the RTN is within 10 cm in all directions, which are better than IGS and EST from 1 cm to 10 cm in three components, where TN direction have the most significant difference. While keeping the satellite antenna parameters used by BDS PPP consistent with the satellite orbit and clock products, the positioning accuracy of the four satellite antenna parameters are similar, in which the last epoch coordinate bias of static PPP is within 5 cm, the RMS of kinematic PPP coordinate bias is within 10 cm in horizontal direction after convergence, and within 15 cm in vertical direction. The average convergence time of kinematic PPP based on ESA and WHU antenna parameters was about 46 min, while the average convergence time based on IGS and EST antenna parameters was about 56 min, slightly worse than the convergence time based on GFZ post-products, and its average convergence time was about 34 min.

Key words: satellite antenna parameters, BDS precise orbit determination, BDS precise point positioning, orbit accuracy, positioning accuracy, convergence time

CLC Number:

P228

HU Yifan, ZHANG Shuai. The impacts of different satellite antenna parameters on BDS precise orbit determination and precise point positioning accuracy[J]. Acta Geodaetica et Cartographica Sinica, 2019, 48(7): 908-918.

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