基于固定参数轨道的动态精密解算精度

Accuracy of dynamic precise calculation based on fixed parameter orbit

为了验证动态精密解算在地震等连续运动平台中的应用效果,使用采样率为1 Hz的双频GPS接收机,并利用参数已知的轨道进行了动态模拟实验.以地震模拟动态平台进行实验,并利用GAMIT软件中的Track模块进行实验分析,通过对GPS数据的精密处理及对不同距离基准站数据的分析,得到了运动轨道图.结果表明:Track模块可使测量点的水平和垂直方向解算精度达到毫米级,说明此种解算方法适合在实际动态测量中进行应用,可以用来反演在地震发生时的地表动态变化情况.

In order to verify the application effect of dynamic precision solution in the continuous motion platform such as earthquake,a dual frequency GPS receiver with the sampling frequency of 1 Hz was used,and the dynamic simulation experiments were performed in the orbit with the known parameters. The experiments were carried out on the dynamic platform for seismic simulation,and the experimental analysis was performed with the Track module in the GAMIT software. Through the precision processing of GPS data and the analysis for the base station data with the different distances,the motion trajectory diagram was obtained. The results showthat the calculation accuracy of measurement points in both horizontal and vertical directions can reach the millimeter level by using the Track module,which means that the proposed calculating method can be applied in the actual dynamic measurement and can be used for inverting the dynamic change situation of ground surface when the earthquake occurs.