摘要
针对中国广域实时精密定位服务系统对高精度实时GNSS轨道的需求,提出了具有历史轨道约束信息的区域站GPS卫星轨道精密确定方法,给出了该方法的数学模型以及不同时刻初始轨道和动力学参数的法方程转换公式。在IGS历史精密轨道和快速轨道约束信息条件下,利用中国境内区域基准站的实测数据验证了该方法的有效性和可行性。
To satisfy the construction of China Real-Time Precise Positioning Service System, a method of orbit determination of navigation satellite based on priori orbit dynamic information was proposed, in which the foregone dynamic orbit information and regional stations＇ measurement information are used together. The key techonique is how to assign weight to two above informations. Mathematic model of this method was introduced and transformation formulae of normal equations with initial orbit parameters at different time were given. The cases that China regional orbit determination based on both IGS Final and IGS Rapid orbit dynamic information were computed. At last regional orbit determination accuracy based on dynamic information with different weighting values was analyzed. Experiment proved that this method was feasible and can obtain encourage results.
出处
《大地测量与地球动力学》
CSCD
北大核心
2009年第5期81-84,共4页
Journal of Geodesy and Geodynamics
基金
国家自然科学基金(40874004)
国家973计划项目(2006CB701301)
国家863计划项目(2006AA12Z326
2007AA12Z345)
高等学校学科创新引智计划(B07037)
关键词
区域增强系统
轨道确定
实时定轨
法方程
全球定位系统
regional augmentation system
orbit determination
real-time orbit determination
normal equation
GPS
