Workshop 2018
Keke Zhang - Integrated precise orbit determination of FY-3C, FY-3D, BDS and GPS - October 29, 2018 • 29 Views
As the operational satellites of China’s FengYun-3 meteorological satellites series, FengYun-3C (FY-3C) and FengYun-3D (FY-3D) are launched in 2013 and 2017 respectively. For the purpose of occultation observation and positioning, FY-3C is equipped with a BDS and GPS dual-system receiver, GNSS Occultation Sounder (GNOS) instrument while FY-3D carries an enhanced one, which give us a great opportunity to investigate the enhancement of onboard data for the GNSS orbits, especially for the BDS constellation. Using FY-3C and FY-3D onboard data as well as global station observations, we processed the integrated precise orbit determination (IPOD) with FY-3C, FY-3D and both of FY-3C and FY-3D respectively. The overlap comparison result shows that compared with FY-3C, FY-3D presents a superior enhancement to GNSS satellites orbits, which can be owing to the more available onboard BDS and GPS data for FY-3D. The overlap difference of GPS, BDS GEO, IGSO and MEO is reduced by 3%, 52%, 2% and 6% respectively when FY-3D data are introduced into the IPOD process replacing that of FY-3C. As expect, the integrated processing of FY-3D and FY-3C onboard data can further improve both BDS and GPS orbit precision. Compared to the IPOD with only FY-3D involved, the orbit precision of GPS, BDS GEO, IGSO and MEO for the IPOD with FY-3C and FY-3D can be improved by (10%, 4%, 21%, 19%), which demonstrates that the more onboard observations can make more contributions to BDS and GPS orbits even with the global network.

View PDF

Please include the IGS logo and citation in all websites, presentations, publications, or posters that use IGS data, products, or services. IGS is a service of IAG.