Analysis about Parameters Selection Strategy of ECOM Solar Radiation Pressure Model for BeiDou Satellites

• Main Authors: MAO Yue, SONG Xiaoyong, JIA Xiaolin, RUAN Rengui
• Format: Article
• Language: zho
• Published: Surveying and Mapping Press 2017-11-01
• Series: Acta Geodaetica et Cartographica Sinica
• Subjects: BeiDou navigation satellite system; solar radiation pressure model; satellite attitude control mode; orbit determination; ECOM; earth eclipse segment
• Online Access: http://html.rhhz.net/CHXB/html/2017-11-1812.htm

In this paper,the variations of ECOM solar radiation pressure model parameters were analyzed for BeiDou satellites through orbit fitting using 3 years precise ephemeris data. The ECOM parameter selection strategies for the three types of BeiDou satellites were confirmed. Based on the satellite attitude control modes,satellite illumination was theoretically analyzed. We pointed out that solar panels are perpendicular illuminated,and then solar radiation pressure has the periodic component associated with the orbital period when satellite is at orbit-normal attitude control mode. Periodic parameters of D direction need to be added to enhance the ECOM 5 parameters. Orbit determination tests were carried out using MGEX global network data. Tests prove that using ECOM 7 parameters the orbit overlap accuracy improvement could reach up to 50%~80%.