GAMP: An open-source software of multi-GNSS precise point positioning using undifferenced and
uncombined observations
by
Feng Zhou1(2,3), Danan Dong(1,2), Weiwei Li(4), Xinyuan Jiang(3,5),
Jens Wickert(3,5), and Harald Schuh(3,5)
1. Engineering Center of SHMEC for Space Information and GNSS, East China Normal University, No. 500 Dongchuan Road, Shanghai 200241, China
2. Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, No. 500 Dongchuan Road, Shanghai 200241, China
3. German Research Centre for Geosciences GFZ, Telegrafenberg, Potsdam 14473, Germany
4. College of Geomatics, Shandong University of Science and Technology, Qingdao 266590, China
5. Technische Universitat Berlin, Berlin 10623, Germany
Abstract:
As the number of GNSS satellites and stations increases, GNSS data processing software should be developed that is easy to operate,
efficient to run, and has a robust performance. To meet these requirements, we developed a new GNSS analysis software called GAMP
(GNSS Analysis software for Multi-constellation and multi-frequency Precise positioning), which can perform multi-GNSS precise point
positioning (PPP) based on undifferenced and uncombined observations. GAMP is a secondary development based on RTKLIB but with
many improvements, such as cycle slip detection, receiver clock jump repair, and handling of GLONASS pseudorange inter-frequency
biases. A simple, but unified format of output files, including positioning results, number of satellites, satellite elevation
angles, pseudorange and carrier phase residuals, and slant Total Electron Content (sTEC), is defined for results analysis and
plotting. Moreover, a new receiver-independent data exchange format called RCVEX is designed to improve computational efficiency
for post-processing.
The technical paper that describes this software is in GPS Solutions, Vol.22, No.2.
Zip file with C code, scripts, tools, sample data, and documentation. (GAMP.zip)
Return to the GPS-TOOLBOX home page