GPS/SINS全组合系统确定SAR卫星的轨道和姿态

GPS/SINS组合系统因其多方面的优越性而在许多导航系统中使用。不过 ,利用GPS接收机的伪距、伪距率和载波相位双差等所有原始观测信息的全组合系统还处于研究之中。针对全组合系统进行了研究 ,建立了相应的误差模型和系统观测模型 ,特别是组合系统下的GPS载波相位双差观测模型。并以高分辨率SAR小卫星的轨道和姿态确定为仿真对象 ,对该系统进行了计算机仿真。仿真结果表明 ,GPS/SINS全组合系统具有很高的精度和可靠性 ,基本上能满足SAR卫星平台的任务要求

Orbit and Attitude Determination of SAR Satellite Using the Fully Integr ated GPS/SINS System

The integrated GPS/SINS system has been adopted in many navigation systems because of it's good performance. However, the fully integrated GPS/SINS system, which adopts all raw measurements data, such as double-differenced carrier phase, is still under investigation. Such a system is discussed in this paper, and the corresponding error model and measurement model, especially double-differenced GPS carrier phase model are set up. Also, computer simulation is made for orbit and attitude determination of on SAR satellite. The results indicate that the proposed system has a high accuracy and reliabilty, which satisfies the mission requirement of an SAR satellite.