The Impact of Yaw Attitude of Eclipsing GPS/GALILEO Satellites on Kinematic PPP Solutions and Their Correction Models

doi:10.11947/j.AGCS.2018.20170695

Abstract

Abstract:

When GPS/GALILEO satellite runs to the position where it is approximately collinear with the sun and the earth, it is difficult for the satellite to keep nominal attitude, so it will show abnormal yaw attitude for a period of time. Based on the precision orbit and clock correction products offered by different analysis centers, we design different attitude correction strategies for satellite that is in abnormal yaw attitude period, select 10-day measured data from 7 MGEX stations distributed globally, and analyze the influence of antenna phase center offset and phase wind-up of GPS/GALILEO satellite on residuals of observations and kinematic PPP positioning result in this paper. The research results show that when the satellite is in abnormal yaw attitude period, adopting nominal yaw attitude can have an impact up to 8 cm and 11 cm on the residuals of GPS/GALILEO satellite observations. GPS/GALILEO satellite is in model yaw attitude during the period and its positioning accuracy of kinematic PPP positioning results in three directions of E, N and U shows an increasing rate of 13.30%, 15.77% and 12.98%, respectively in comparison with that in nominal yaw attitude. Comparing with satellite deletion strategy, the accuracy of kinematic PPP positioning results in three directions of E, N and U when the satellite is in model yaw attitude shows an increasing rate of 5.399%, 4.430% and 5.992%, respectively.

Key words: yaw attitude, phase wind-up, antenna phase center offset, kinematic PPP

CLC Number:

P228

LIU Tianjun, WANG Jian, CAO Xinyun, KUANG Kaifa, FAN Caoming. The Impact of Yaw Attitude of Eclipsing GPS/GALILEO Satellites on Kinematic PPP Solutions and Their Correction Models[J]. Acta Geodaetica et Cartographica Sinica, 2018, 47(12): 1599-1608.

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