GPS单点定位和差分定位程序及详细说明，始于初学者学习GPS导航定位原理。-GPS single point positioning and differential positioning procedures and detailed instructions for beginners to learn GPS navigation began in principle.

GPS单点定位的程序，包括导航文件和观测文件的读取，各种误差的处理-GPS single point positioning procedures, including navigation to read the file documents and observation of various error handling, etc.

实现利用gps观测文件和导航文件进行单点定位功能(Using GPS observation files and navigation files for single point positioning function)