Tools and PPT

【开源代码】GREAT多频多系统UPD开源代码

Upload on 2020-12-04T13:38:16Z

Upload by Han Xinjuan

【所属分类】：C++源码
【开发工具】：C++ 11
【文件大小】：138MB
【使用说明】：请按照压缩包内示例使用
【UPD介绍】：
* 为满足精密定轨估钟、高精度定位和导航应用的需要，武汉大学测绘学院设计开发了GREAT(GNSS+ REsearch, Application and Teaching)软件。GREAT-UPD是GREAT软件中的一个重要模块，可用于多频多系统UPD估计。它可以为GPS、GLONASS、Galileo和BDS（GREC）卫星提供超宽巷（EWL）、宽巷（WL）和窄巷（NL）UPDs，供用户在多频多系统环境下实现精密单点定位（PPP）模糊度解算（AR）。开源的UPD软件以C++ 11语言编写，遵循面向对象的原则，可以编译，并适用于几个流行的操作系统，如Windows，Linux和Macintosh。利用年积日091～120天222个台站的观测资料，进行了多频多系统UPD估计和PPP-AR分析，结果表明，可以产生稳定可靠的UPD产品。在应用UPD校正后，获得了多频GREC-PPP-AR，平均首次固定时间（TTFF）为9.0分钟。压缩包内包括包括源代码、用户手册、批处理脚本、示例数据以及一些辅助工具。
该代码同时托管在[ngs.noaa.go](https://www.ngs.noaa.gov/gps-toolbox/GREAT-UPD.htm)上，您也可以选择点击链接进行下载。

* To meet the demands of precise orbit and clock determination, high-precision positioning, and navigation applications, a software called GREAT (GNSS+ REsearch, Application and Teaching) was designed and developed at Wuhan University. As one important module in GREAT software, GREAT-UPD was developed for multi-GNSS and multi-frequency uncalibrated phase delay (UPD) estimation. It can provide extra-wide-lane (EWL), wide-lane (WL) and narrow-lane (NL) UPDs of for GPS, GLONASS, Galileo and BDS (GREC) satellites for users to achieve precise point positioning (PPP) ambiguity resolution (AR) in the a multi-GNSS and multi-frequency environment. The open-source GREAT-UPD software is written in C++ 11 language following the Object-Oriented principles and can be compiled, and run on several popular operating systems, such as Windows, Linux, and Macintosh. Observations from 222 stations spanning days from DOY 091 to 120 were used to conduct multi-GNSS and multi-frequency UPD estimation and PPP AR. Results indicate that stable and reliable UPD products can be generated by GREAT-UPD with multi-GNSS and multi-frequency observations. After applying the UPD corrections, the multi-frequency GREC PPP AR was achieved with the averaged time to first fix (TTFF) of 9.0 min.
The software package can be obtained at [ngs.noaa.go](https://www.ngs.noaa.gov/gps-toolbox/GREAT-UPD.htm), including the source code, user manual, batch processing scripts, examples data, and some auxiliary tools.