NEMA协议校验值的计算

提出了利用精密单点定位(precise point positioning,PPP)技术进行海啸预警的方法,并利用TriP软件对实测浮标数据进行了处理,将得出的海面高数据和海啸波模型叠加进行了模拟分析。仿真结果表明,利用精密单点定位技术进行海啸预警,能够监测判断海啸的发生,并获得海啸波到达海岸的波高和时间,提供一定的预警信息。 -Made use of Precise Point Positioning (precise point positioning, PPP) technology for tsunami early warning methods and the use of Trip software buoy measured data were processed, will come to the surface of high tsunami wave model data and conducted a simulation analysis of superposition. The simulation results show that the use of Precise Point Positioning for the tsunami early warning, to monitor to determine the occurrence of the tsunami, and tsunami wave reached the coast, wave height and time, provide some early warning information.

应用背景    从卫星导航rinex观测量文件中，自动识别观测量的名称，并提取所有观测量，包括有伪距，载波相位，载噪比以及多普勒。按照卫星号和观测量类别组成数组，并按照gps和北斗两大类输出。关键技术    关键技术包括有：（1）观测量名称自动识别，字符串转换为变量名；（2）文本数据读取并整理；（3）按时间和卫星数分布观测量数据。

This a GPS communication source code to interrupt the NMEA code though serial port. Very good code to study and apply it to your own program.-This is a GPS communication source code to interrupt the NMEA code though serial port. Very good code to study and apply it to your own program.

H31GPSTest2007-06-09.rar自动查找GPS端口的一个测试程序-H31GPSTest2007-06-09.rar automatic search of a GPS port testing procedures

本文设计的FPGA模块需要对GPS、便携打印机和串口数据进行处理，将详细介绍如何设计FPGA和不同外设之间的数据传输。同时，在RTL编码中，编写使综合与布局布线效果更佳的代码。-In this paper, the design of FPGA modules need for GPS, portable printers, and serial data processing, will be details on how to design FPGA and data transfer between peripherals. At the same time, RTL coding, synthesis and preparation to make better placement and routing code.

对C/A码的相关在频域中的matlab实现仿真，大家交流啊，-Of C/A code correlation in the frequency domain realize matlab simulation, the exchange of everyone ah,

AT-command modem SIM508Z (en)_SIM508_ATC_V1.01

GPS模块开发：vb、rs232串行通信控制-GPS Module Development: vb, rs232 serial communication control

该代码使用的是vc，该代码实现了向手机发送短信的功能。-The code using vc, the code to realize the functions of mobile phones to send text messages.

使用C#语言编写的对流层延迟误差计算，采用的模型为SAAS模型，内置GMT计算地面点天顶方面水汽、温度等信息，可视化界面，便于操作。