摘要
太阳辐射压摄动是导航卫星受到的最大非保守力,是精密定轨的主要误差源,目前一般使用扩展经验光压模型(ECOM)等经验模型应用于卫星的精密定轨,分析型光压模型物理背景清晰,更加适合在轨初期的精密定轨。文章分析了分析型光压模型在我国北斗高轨导航卫星中的应用。选取了约1个月的北斗地球静止轨道-6(GEO-6)和倾斜地球同步轨道-5(IGSO-5)卫星数据进行分析,其太阳辐射压摄动加速度在轨道的径向(R)、横向(T)和法向(N)3个方向分别约为10-7、10-7和10-8m/s2量级,将分析型光压模型和精密定轨输出的太阳辐射压加速度进行比较,GEO-6卫星径向和横向的差异在10-8m/s2量级,法向方向在10-9m/s2量级,相对误差在10%左右,对IGSO-5卫星,差异要小1/2左右,约为5%。以多模GNSS系统试验网络(MGEX)的轨道作为参考,直接使用分析型光压模型,GEO-6位置误差约为2.5 m, IGSO-5位置误差约为1.5 m,增加偏差和尺度因子标校参数后,位置精度分别提高到约0.5 m和0.1 m。结果表明:利用分析型光压模型,可以实现北斗GEO和IGSO卫星分米级的定轨精度。
Solar radiation pressure(SRP)is the largest non-gravitational perturbation for GNSS satellites,and is the main error source of GNSS precise orbit determination.The precision orbiting of navigation satellites generally uses empirical SRP models such as ECOM.The analytical SRP model has advantage of clear physical significance,which is more applicable to early stage of satellite mission.This paper analyzes the application of the analytical SRP model in Beidou Satellites.After about one month of analysis from Beidou GEO-6 and IGSO-5 satellite data,the SRP perturbation acceleration in the three directions of RTN is about 10-7,10-7 and 10-8 m/s 2 respectively.Comparing the analytical SRP model with the solar radiation pressure acceleration output by precision orbiting,the difference between the R and T directions of the GEO-6 satellites is on the order of 10-8 m/s 2,and the N direction is on the order of 10-9 m/s 2,and the relative error is about 10%.For IGSO-5 satellites,the difference is about a half,which is 5%.The application of analytical SRP model in BeiDou satellites precision orbit determination is further analyzed,MGEX orbit is used as the reference orbit,and the analytical SRP model is directly used,the position error of GEO-6 is about 2.5m,the position error of IGSO-5 is about 1.5m,and the position accuracy is improved to about 0.5m and 0.1m respectively after adding the deviation and scale factor calibration parameters.The results show that the analytical SRP model can realize the decimeter orbit determination accuracy of Beidou GEO and IGSO satellites.
作者
张国亭
王宏
黄勇
郑世贵
王振兴
ZHANG Guoting;WANG Hong;HUANG Yong;ZHENG Shigui;WANG Zhenxing(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China;Beijing Institute of Tracking&Telecommunications Technology,Beijing 100094,China;Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)
出处
《航天器工程》
CSCD
北大核心
2023年第2期31-38,共8页
Spacecraft Engineering
关键词
分析型光压模型
北斗导航卫星
精密定轨
标校参数
analytical solar radiation pressure model
Beidou navigation satellites
precise orbit determination
calibration parameters
