摘要
本文基于卫星精密定轨的基本理论,研究了GRACE卫星非差简化动力学定轨的方法;并用自行研制的定轨软件CASMORD对实测的星载GPS数据进行非差数据的简化动力学定轨,通过比较GRACE卫星解算的轨道与JPL事后轨道及SLR测距信息,结果表明:利用非差观测值进行GRACE卫星的简化动力学定轨,三维位置精度(3D-RMS)优于7 cm,X、Y、Z方向RMS约为3～5cm,从而论证了该方法的可行性、实用性。
Based on the basic theory of Precise Orbit Determination,the method of the reduced-dynamic orbit determination using zero-difference data onboard GPS observations was researched in this paper·The orbit of GRACE satellite was determined by the auto-nomic software CASMORD.Compared GRACE orbiting results of reduced-dynamic method’s solutions with JPL’s PSO and SLR measurement,the results showed that the 3D-RMS was better than 7 cm and the direction ofX,Y,Zwas about3～5 cm,to demonstrate the feasibility and practicability of this method.
出处
《测绘科学》
CSCD
北大核心
2011年第3期32-33,39,共3页
Science of Surveying and Mapping
基金
国家高技术研究发展计划(2009AA12Z318)
国家测绘局资源三号卫星项目
关键词
非差
GRACE卫星
简化动力学定轨
星载GPS
zero difference
GRACE satellite
reduced-dynamic orbit determination
onboard GPS
