伪距单点定位，Rinex文件读取数据解析，计算卫星在轨位置，计算测站坐标-Pseudo-range single-point positioning, Rinex file read the data analysis, calculation of satellite position in orbit to calculate station coordinates

利用IGS提供的广播星历计算GPS卫星坐标，经度可以达到1m，文件输出计算结果-Using IGS provides GPS satellites broadcast ephemeris to calculate the coordinates, longitude can reach 1m, file output results