Its-GPS-ranging-codes

处理GPS数据，形成电离层的模型，在C#环境下的控制台。(Processing GPS data, the formation of the ionosphere model, in C# console environment.)

GPS信号干扰信号中扫频干扰源代码，matlab程序。(GPS signal interference signal sweep interference source code, matlab program.)

研究了一种数字中频 GPS 信号生成方法。给出了数字中频信号数学模型，模型考虑了各种因素对信号的影响。通过导航电文分析，提出信号传播时延、多普勒频移以及信号入射方向的估计方法。给出了中频信号产生的流程，对其中时延的设置，信号的上变频、信号幅度设置以及方向信息的导入进行了阐述。对所生成的信号模型进行了仿真分析，给出了信号产生各个阶段的频谱，对所生成的信号进行了相关捕获。仿真结果表明频谱特征符合理论分析，能够被捕获并找出信号时延从而实现定位。证明该信号模型能作为信号源应用于 GPS接收机研制中。(】The paper discusses a digital IF GPS signal generation method, gives the mathematic model of digital IF signal. This mathematic model takes into account the influence of various factors. Based on analysis of the navigation data, the method to estimate signal propagation time, Doppler frequency shift and the coming angle of signal is proposed. The flow to generate IF signal is given, in which the setting of time delay, the up-frequency conversion, the setting of signal magnitude and the introduction of direction information are expounded. The signal generation model is simulated and analyzed, the spectrum of signal in each stage given, and the correlation capture of the generated signal also done. Simulation indicates that the spectrum is in accord with theoretical analysis the signal could be captured, thus find the time delay, accomplish the orientation. The signal model is proved applicable in the research and development of GPS receiver.)

一个简易的GPS接收机程序，适合初学者了解接收机的工作流程和具体实现方式(A and easy GPS receiver program, suitable for beginners to understand the workflow of the receiver and specific implementations)

本文详细的介绍了GPS-INS紧组合的相关内容，包括状态方程和量测方程的建立。对正在学习这方面的朋友很有帮助。(In this paper a detailed description of GPS-INS tight combination of content, including the establishment of the state equation and measurement equation. Helpful friends are learning in this area.)

GPS 用户PVT解算程序，亲测非常好用(GPS PVT code)

GPS坐标转换软件与源程序 支持世界上大多数坐标框架下，大地坐标空间直角坐标以及平面投影坐标（UTM、高斯）等的相互转换(GPS coordinate conversion software with source code to support most of the world)

说明：  基于串口通讯获取GPS报文数据，然后进行校验，解析，显示。多线程运行。(The data of GPS message is acquired based on serial communication, and then verified, analyzed and displayed. Multithreading.)

只对未知点设立未知参数的高程网与GPS基线网平差(Only the establishment of unknown parameters elevation network and GPS baseline network adjustment of the unknown point)

说明：  主要用于电子罗盘实验，对于新手调试入手很快(Mainly used in electronic compass experimen,For beginners, debugging starts quickl)