牛顿插值算法

!  Description : 计算逆矩阵 !     !----------------------------------------------------- !  Contains    : !      1.   driver  驱动函数 !      2.   solve   方法函数  已经经过验证，高效简洁

GPS 定位系统，不错的介绍。可以了解GPS的只是-GPS positioning system, a good introduction. GPS can understand only

The idea behind differential GPS is to remove as much errors as possible from the range measurements by establishing these errors at a reference site. In its most simple setup, a GPS receiver is located at a well surveyed position and its (pseudo) range measurements are compared with the actual calculated range from this receiver to the SV s. The differences between measured ranges and calculated ranges at the reference receiver are applied as corrections to the ranges measured by other receiver(s) close by.

在测绘领域根据需要需要进行多种坐标系之间转换，常用的坐标系包括BJ54，西安80，WGS84.CGCS2000，七参数转换，本程序实现了北京54到当地坐标系，西安80到当地坐标系，以及当地坐标系到北京54与西安80之间的相互转换等

精密星历是按照15min的间隔给出卫星位置，要想获取任意时刻卫星的位置，必须对精密星历进行内插，本程序实现了通过读取SP3文件，对卫星的星历进行内插计算。

短信发送实现gprs猫发送短信息，wap push，push load，免提短信源代码.-gprs cat achieve this short message, WAP push, push load. Handsfree SMS source code-Send message to achieve gprs cat send text messages, wap push, push load, hands-free source code message .- gprs cat achieve this short message, WAP push, push load. Handsfree SMS source code

GPS C/A code signal genration

此程序为GPS软件接收机的源码，能够对数据实施捕获和跟踪算法，对理解GPS接收机原理有很大帮助。,,Visual C++,GPS develop -procedure for the GPS receiver software source code, to the implementation of data capture and tracking algorithm, right GPS receiver understanding will be of great help. ,, Visual C, develop GPS

GPS,GALILEO,北斗可见星数目仿真-GPS, GALILEO, the Big Dipper stars can be seen the number of simulation

gps接收端源码以及1个test列子，提供简单的经纬度，速度，时间等GPS数据信息-gps receiver as well as a test source Liezi, providing a simple latitude and longitude, speed, time GPS data