时间转换的源码，其中包括了儒略时，年积日，GPS时，通用时的转换，适用于测绘类应用和研究，特别是GPS定位的时间系统的实现,Conversion time source, including Julian, the annual day, GPS, the GM at the time of conversion, for mapping applications and research, especially in time GPS positioning system

GPS/GALILEO接收机设计的很好参考，尤其是对于接收机芯片设计具有直接的指导作用-GPS/GALILEO receiver design of a good reference, especially for receiver chip design has a direct role in guiding

Set of tools for transformation used in geodesy, especially when using GPS or mapping