Impact Analysis of Yaw Attitude on BDS Precise Point Positioning

• Main Authors: YE Shirong, XIA Fengyu, ZHAO Lewen, XIA Pengfei, CHEN Dezhong
• Format: Article
• Language: zho
• Published: Surveying and Mapping Press 2017-08-01
• Series: Acta Geodaetica et Cartographica Sinica
• Subjects: orbit-normal; antenna phase center offset; phase wind-up; PPP
• Online Access: http://html.rhhz.net/CHXB/html/2017-8-971.htm

When the elevation of the Sun with respect to orbital plane is small, the BDS satellite will not track the position of sun and thus will lead to abnormal attitude changing. To avoid this phenomenon, the satellite attitude keeps in orbit-normal mode during the period. The nominal attitude correction methods will affect the calculation of antenna phase center offset and phase wind-up in orbit-normal seasons, and furthermore lead to biases to the position and zenith tropospheric delay(ZTD) estimatedby precise point positioning (PPP). The results of the experiments undergone show that the comprehensive phase wind-up and the satellite antenna phase center errors caused by the incorrect BDS satellite orbit model will exceed 15cm. Compared to the nominal attitude mode,when the orbit-normal attitude mode is adopted, the positioning accuracy in the north, east and up directions will be improved by 53.2%, 54.2%, and 39.3% for dynamic PPP, 61.0%,72.3%,58.4% for static PPP, respectively. Furthermore, the accuracy of ZTD estimated by static PPP will be improved by 33.0%.