Analysis of BDS Satellite Clock Prediction Contribution to Rapid Orbit Recovery
作者单位：Shanghai Astronomical Observatory Chinese Academy of Sciences School of Astronomy and Space ScienceUniversity of Chinses Academy of Sciences
会议名称：《第九届中国卫星导航学术年会》
会议日期：2018年
学科分类：08[工学] 080401[工学-精密仪器及机械] 081105[工学-导航、制导与控制] 0804[工学-仪器科学与技术] 082503[工学-航空宇航制造工程] 0825[工学-航空宇航科学与技术] 0811[工学-控制科学与工程]
关 键 词：BDS Time Synchronization Satellite Clock Precise Orbit Determination Rapid Orbit Recovery Satellite Availability
摘 要：The BDS-2 system is designed as a GEO/IGSO/MEO mixed ***,there exists satellite maintaining operation for GEO or IGSO satellite every 7 to 10 *** this period the maneuver satellite is out of *** will be about 5 to 6 hours starting from the beginning of satellite maneuver to the release of the first group of recovery *** of satellite clock assisted precise orbit determination(POD) is normally implement,where the most critical factor that contributes to the availability of maneuver satellites is the length of accumulation of ***,the last hour of real-time observed pseudo-range data of tracking station could not be included in POD,due to the reason that the satellite clock could not be observed in real-time..In this paper,we propose to use the polynomial fitting method to forecast the satellite clocks and use it in *** analyze the accuracy of satellite clocks prediction and its contribution to the rapid orbit *** show that the satellite unavailability time could be shortened by at least 1 hour,which effectively improves satellite *** it improves the accuracy of orbit determination and prediction by more than 15% and 70%.