【作者】 韩保民； 欧吉坤； 曲国庆；

【Author】 HAN Baomin OU Jikun QU Guoqing 1 Shandong University of Technology, Zibo 255049 2 Institute of Geodesy and Geophysics, Laboratory of Dynamical Geodesy, Chinese Academy of Sciences, Wuhan 430077

【机构】 山东理工大学建筑工程学院； 中国科学院测量与地球物理研究所动力大地测量重点实验室；

【摘要】 星载GPS模拟观测值就是对某颗高速运行的卫星上可能接收到的GPS观测值情况的模拟。在模拟观测值中,事先已经准确知道低轨卫星的三维位置、各种误差的大小及观测噪声水平等,那么在用星载GPS模拟观测值对不同定轨方案如模糊度解算方案、Kalman滤波方法等进行论证时。会有很强的针对性。鉴于国内专门、系统研究星载GPS观测值模拟的情况还不太多,本文重点分析了星载GPS观测值模拟的原理、数学模型等,最后文章并用作者自己编写的模拟软件模拟了CHAMP卫星的星载GPS观测值情况。结果表明,根据本文提供的模拟方法所模拟的CHAMP星载GPS观测值和实测值无论在大小还是观测噪声水平上都很接近,因此能满足不同层次人员对星载GPS模拟观测值的需要。更多还原

【Abstract】 Since the three-dimension coordinates of a LEO and GPS satellites are known in a simulation of GPS observation on a moving low-earth-orbiter (LEO) with high speed, the values of various errors and observation noise level can be well calculated and known in advance, so using GPS simulation observations of an onboard GPS receiver can be of great help for demonstrating different orbit de- termination designs concerning ambiguity resolution method, Kalman filtering technique and so on. The principle and mathematical model of a simulation are emphasized firstly, and then the GPS dualfrequency P code and carrier-phase observations of potential onboard GPS recovers are simulated by employing some elaborately selected error models. The results show that the simulated observations of CHAMP satellite obtained from software compiled by author are very close to the real measurements in size and observation noise level, therefore they can meet the different demands of scientists.更多还原