GPS数据的通道采集,完成载体姿态的数模建立,并实现定位定向-Access GPS data collection, achieve vector-profile digital-to-analog set up, and implementation-oriented positioning

GPSCA码跟踪，自己编写，可观察误码率，-GPSCA code tracking, I have written, the bit error rate can be observed,

产生gps c/a码，能够实现各个卫星的ca码，可以看一下-To generate code gpsca can achieve ca code of each satellite