gps_lms

stm32 ATG336H GPS, get Times, use oled to show

本人编制的GPS的数据解析代码，其中包括对五种NMEA协议的解析(I compiled the code of GPS data analysis, including analysis on five NMEA protocol)

详细的卫星伪距单点定位程序，包含读N、O文件，卫星坐标计算(Detailed satellite pseudorange point positioning procedures, including reading N, O file, Orbit Calculation)

一个关于GPS的工具箱，用于仿真卫星信号产生、信号传播环境、接收机测量和数据处理流程(The Toolbox about GPS allows to simulate the satellites, the propagation environment, the receiver measurements and the data processing.)

TI DSP XDS100V3仿真器原理图Rev2.0(TI DSP XDS100V3 schematic Rev2.0)

说明：  集中模糊度固定方法的整合，包含算例,说明，比较完整(several ways of lambda)

计算两组数据的皮尔逊相关系数，取值位于-1到1之间，绝对值越大，线性相关性越好。(Calculate the Pearson correlation coefficient between the two sets of data)

对载波相位平滑伪距的原理和数据预处理进行了探讨,给出提高其定位精度的处理方法和流程。通过 两个算例得到如下结论:对C1和P2码进行相位平滑可有效提高伪距定位精度,较长时间观测定位精度可达1 m 左右,利用精密星历改进后,平滑伪距的定位精度可达0. 5 m左右 对P1和P2码进行相位平滑对定位精度提高不 大,较长时间观测平滑前后的定位精度均可达到0. 6 m,利用精密星历改进后,精度可达0. 3 m 在动态测量后处理 中,绝大部分历元利用精密星历结合相位平滑的定位精度可达2 m。 (The principle and data preprocessing ofcarrier smoothed pseudorange are discussed and themethod which can improve the positioning accuracy and its flow are given.W ith thismethod two computation examples are made.The results show tha:t 1)the accuracy can be improved efficiently by using smoothed C1and P2pseudorange in static data processing, the accuracy can reach 1m if the time is long and can attain 0. 5m if the precise ephem- eris is taken 2)the accuracy can be boosthardly by using smoothed P1and P2pseudorange, but the accuracy can be improved from 0. 6m to 0. 3m if the time is long enough and the precise ephemeris isused 3)mostepochs can reach to the accuracy of2 m precision in kinematic positions if the smoothed code and precise ephemeris are uti- lized. )

这是国外关于卫星导航方面一书的源代码，相信对初学者会有很大的帮助，里面包含位置计算、星历计算、模糊度计算等功能。(This is the foreign aspects of satellite navigation on the book s source code, I believe there will be a great help for beginners, which contains the location of computing, ephemeris calculation, calculation of ambiguity functions.)

测绘gps数据处理中必须应用的内容，用于gps基线网平差(GPS adjustment)