通过已知的GPS卫星坐标数据及伪距，计算地面点的位置坐标-GPS satellites by a known coordinate data and pseudorange calculation ground point coordinate

GPS坐标及高程的中误差计算程序，能够快速计算X，Y，h的中误差，方便快捷-GPS coordinates and the elevation error calculation program to quickly calculate the X, Y, h in error, convenient

本代码实现：由两点的坐标计算两点间的距离,方位角；还可通过距离,方位角计算点的坐标-This code implements: by two coordinates to calculate the distance between two points, azimuth