摘要
研究了基于全球分布的IGS站观测数据实现GPS导航星座精密定轨的基本方法、流程及策略,研制了一套GPS导航星座精密定轨软件。利用该软件以及全球200个IGS跟踪站2012年1月的观测数据,计算了GPS导航星座最终轨道结果。与IGS最终轨道产品比较的结果表明:基于该定轨策略确定的GPS导航星座最终轨道,在径向、切向、法向、1D方向的均方根分别为:0.70、1.60、1.04、1.23 cm,整体精度与IGS最终轨道产品相当。
Precise Orbit Determination （POD）of GNSS navigation constellation is the most key technology for guaranteeing the performance of GNSS navigation system. Basic methods, process and strategies to determine the or-bits of GNSS navigation constellation were introducted. A set of software has been developed with which POD of GPS navigation constellation based on the data of 200 IGS stations during January is calculated. The result of com-paring the orbits with IGS final orbit products shows that the orbits position accuracy of R, T, and N position compo-nents is 0. 70,1. 60,1. 04 cm, and the 1D-RMS is 1.23 cm, and it＇ s the same level as IGS final orbit products.
出处
《大地测量与地球动力学》
CSCD
北大核心
2014年第1期84-87,共4页
Journal of Geodesy and Geodynamics
基金
国家973计划课题(2012CB825604)
国家自然科学重点基金(41231064
41021003
41104012)
国家863计划课题(2012AA121803)
关键词
GPS导航星座
精密轨道确定
IGS站
分网定轨
法方程叠加
GPS navigation constellation
precise orbit determination
IGS stations
networks
combination of nor-mal equations
