SDP4模型用于北斗导航卫星轨道预报的精度分析  

Accuracy Analysis for SDP4 Model Used in BeiDou Navigation Satellites Orbit Prediction

作　　者：车通宇 杨力[2] 张传定 刘永[2] 王梦茹[2] 

机构地区：[1]61363部队,陕西西安710054 [2]信息工程大学,河南郑州450001 [3]61081部队,北京100094

出　　处：《测绘地理信息》2017年第2期12-16,共5页Journal of Geomatics

基　　金：国家自然科学基金资助项目(41174026);大地测量与地球动力学国家重点实验室开放基金资助项目(SKLGED 2014-3-5-E)

摘　　要：为了实现对北斗导航卫星的监测与跟踪,需要对其轨道进行预报。利用双行星历(TLE)采用SDP4模型对北斗导航系统的3类卫星(GEO、IGSO、MEO)进行轨道预报,并对比了Trimble公司的接收机历书星历和HPOP高精度轨道外推模型预报出的星历,采用GFZ公布的北斗精密星历对其预报精度进行了评估。分析表明,SDP4模型计算速度快,可以实现对于北斗导航卫星的轨道预报,满足跟踪和监测的精度要求,具有实用价值;该模型对于MEO卫星轨道预报效果最好,IGSO卫星次之,GEO卫星最差;3日以内的短期轨道预报可以采用历书星历或者HPOP外推模型预报的星历,但是3日以上轨道预报利用SDP4模型更好;对不同预报时间下的预报轨道可以使用的领域提出了建议。Orbit prediction is needed to achieve the monitoring and tracking for BeiDou navigation satellites.It applies BDS＇s three kinds of satellites（GEO/IGSO/MEO）with TLE ephemeris in SDP4 model to make the orbit prediction.In the meanwhile we compared the Trimble＇s receiver autonomous ephemeris with ephemeris conducted by HPOP model.The accuracy is evaluated by BDS＇s precise ephemeris that GFZ published.The analysis shows：SDP4model calculates so fast that it reaches the requirements for monitoring and tracking for BDS.Thus it is of practical value and it can execute the BeiDou navigation satellites orbit prediction.The model is best for MEO orbit prediction but is worse for IGSO and is worst for GEO;short-term orbit prediction within three days can use almanacs or ephemeris conducted by HPOP model but SDP4 is better for orbit prediction more than three days;it promotes recommendations for different users based on the forecast＇s time.

关 键 词：轨道预报 北斗导航系统 SDP4模型 

分 类 号：P228.41[天文地球—大地测量学与测量工程]