根据GPS卫星观测文件（.00O）与星历文件(.00N)，计算各历元测站的位置。-According to documents GPS satellite observations (.00 O) and ephemeris file (.00 N), calculated each epoch station location.

卫星轨道参数正反算，根据卫星的位置和速度，求取实时卫星轨道的两行根数，即6个开普勒根数。卫星星历计算以及卫星轨道参数计算-Considered the pros and cons of satellite orbit parameters, depending on the location and speed of the satellite, two lines of strike root of the number of real-time satellite orbit that Ke