gps导航工具包，可用于分析GPS误差，伪距及导航融合算法-This report include the review of • Principle of Radio Navigation: navigation base on trilateration has been investigated and the over determined Eq. for navigation has been solved. • GPS Ephemeris Data

简易时钟，MATLAB界面开发程序源代码，产生一个显示时间的界面-clock produce a small program in order to see the time

用于MATLAB仿真中定时，采用GARDNER。仿真结果由环路滤波器，时钟溢出等参数(Used in MATLAB simulation timing, using GARDNER. The simulation results are composed of loop filter, clock overflow and other parameters)