基于星载GPS/BDS的低轨卫星精密定轨  

Simulation Research on Precise Orbit Determination of LEO Satellite Based on Spaceborne GPS and BDS

作　　者：赵春梅[1] 张德成[2] 何正斌[1] 李谦[1] 

机构地区：[1]中国测绘科学研究院,北京100830 [2]国家测绘地理信息局第一大地测量队,陕西西安710054

出　　处：《导航定位学报》2015年第3期18-23,34,共7页Journal of Navigation and Positioning

基　　金：国家自然科学基金项目(41274018);中国测绘科学研究院基本科研业务费(7771509);测绘地理信息公益性行业科研专项(201412001)资助

摘　　要：本文针对基于星载GPS和BDS的低轨卫星联合定轨问题进行了研究。以资源三号卫星为例,仿真了星载GPS和BDS观测数据,基于非差动力学定轨原理和法方程叠加方法进行了单独定轨和联合定轨试验。试验结果表明,在仅考虑观测噪声情况下,采用星载GPS和BDS数据解算得到的轨道位置精度分别为0.9 cm和5.1 cm,联合定轨精度可以达到0.9 cm,精度与单独利用GPS数据解算的精度相当;当采用截止高度角方式人为减少参与解算的星载GPS数据量进行定轨解算时,定轨精度降低为3.9 cm,此时再进行联合定轨解算,在合理分配权值的情况下,定轨精度可以达到3.4 cm,精度有所提高。Based on the valuable experience of research and implementation of LEO satellites orbit determination at home and abroad,the simulation research of LEO orbit determination with spaceborne GPS/BDS observation data is implemented by normal equation stacking.The accuracy of determined orbit based on spaceborne GPS data and spaceborne BDS data is respec-tively 0.9cm and 5.1cm.The accuracy of combined orbit determination can be achieved 0.9cm,which is equal to the orbit de-termination accuracy by spaceborne GPS data.If the spaceborne GPS data that is used to estimate parameters is reduced artifi-cially,the accuracy of orbit determination will reduce to 3.9 cm.And the accuracy of combined orbit determination can reach to 3.4cm when the weight between GPS and BDS is distributed reasonable.Compared with the orbit determined by spaceborne GPS data or spaceborne BDS data,the accuracy is improved.The feasibility and validity of the orbit determination method is demonstrated.

关 键 词：GPS BDS 低轨卫星 法方程叠加 联合定轨 

分 类 号：P228[天文地球—大地测量学与测量工程]