一个GPS网WGS_84平差坐标向地方独立坐标的转换文档，比较全

Gps.setupcom() 初始化Gps.setsystime() 对时GPSTD-2000型GPS卫星同步时钟 山东三鑫科技集团 烟台开发区三鑫电子通讯工程有限公司-use Gps.setupcom() to initialize use Gps.setsystime() to adjust time

GPS软件接收机的源码，实现信号跟踪、捕获、电文解调、定位解算等功能，有助于学习卫星导航的同学加深对GPS接收机工作原理的理解，也可作为核心代码扩展为GPS接收机工作原理演示程序。

跟踪全球定位系统启用谷歌地图手机。项目包括J2ME的手机源和源代码，以显示自己的网站上的数据。-Track a GPS enabled cell phone on Google maps. Project includes J2ME cell phone source and source code to display data on your own website.

介绍VB下MAPX实现的二次搜索查询，MapX+VB的源代码和结果图形界面-introduced VB Connection"s secondary search query, MapX VB source code and the results of a graphical interface

此matlab函数可以在ECEF和ECI坐标之中转换地点和速率信息。-This matlab function ECEF and ECI can convert the coordinates of the location and rate information.

Subroutine for computing an Ionospheric range correction for the GPS L1 frequency from the parameters broadcasted in the GPS  Navigation Message. 

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.

procedure TfrmMain.DrawSatInfo(gps: TGPSInfo; pbx: TPaintBox); var   i: integer;   r: integer;   dx,dy: integer; begin   r := pbx.Width div 2;   for i:= 1 to 12 do begin     if gps.SatInfo[i].PRN 0 then begin       dx := r + Round(r*(90-gps.SatInfo[i].EL)*sin((gps.SatInfo[i].AZ - 90)*Pi/180)/90);       dy := r + Round(r*(90-gps.SatInfo[i].EL)*cos((gps.SatInfo[i].AZ - 90)*Pi/180)/90);       dx := dx - 8;       if dx < 0 then dx := 0;       if gps.SatInfo[i].SN > 20 then begin         pbx.Canvas.Font.Color := clBlue;         pbx.Canvas.TextOut(dx,dy,inttostr(gps.SatInfo[i].PRN));       end else begin

这个是程序用到的四颗可见星的所用的所有信息。其中给出7个可见星的信息，选则其中最好的四颗。请把信息内容复制到.txt中。-This is the program used four visible stars all of the information used. Which are given seven visible stars of information, the election is the best of four. Please copy the information content. Txt in.

有关GPS GDOP度量分析的一文章，有兴趣的朋友可以下载看看！希望会有所帮助。-GPS GDOP metric related to the analysis of one article, interested friends can download to see! Hope will be helpful.