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GAMP: An open-source software of multi-GNSS precise point positioning using undifferenced and uncombined observations

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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 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, 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.

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Acknowledgements

Feng Zhou is financially supported by the China Scholarship Council (CSC) for his study at the German Research Centre for Geosciences (GFZ). We thank the IGS for providing GNSS ground tracking data, DCBs, precise orbit, and clock products. We are also grateful for providing the SAPOS data via GFZ. Many thanks go to Dr. Shengli Wang for his valuable suggestions. The figures were generated using the public domain GMT software (Wessel et al. 2013). This work is sponsored by the National Key Research and Development Program of China (No. 2017YFE0100700), the Scientific Research Foundation of Shandong University of Science and Technology for Recruited Talents (No. 2017RCJJ074), the National Natural Science Foundation of China (Nos. 61372086, 41771475), and the Science and Technology Commission of Shanghai (Nos. 13511500300, 15511101602).

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Authors and Affiliations

  1. Engineering Center of SHMEC for Space Information and GNSS, East China Normal University, No. 500 Dongchuan Road, Shanghai, 200241, China

    Feng Zhou & Danan Dong

  2. Shanghai Key Laboratory of Multidimensional Information Processing, East China Normal University, No. 500 Dongchuan Road, Shanghai, 200241, China

    Feng Zhou & Danan Dong

  3. German Research Centre for Geosciences GFZ, 14473, Telegrafenberg, Potsdam, Germany

    Feng Zhou, Xinyuan Jiang, Jens Wickert & Harald Schuh

  4. College of Geomatics, Shandong University of Science and Technology, Qingdao, 266590, China

    Weiwei Li

  5. Technische Universität Berlin, 10623, Berlin, Germany

    Xinyuan Jiang, Jens Wickert & Harald Schuh

Authors
  1. Feng Zhou
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  2. Danan Dong
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  3. Weiwei Li
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  4. Xinyuan Jiang
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  5. Jens Wickert
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  6. Harald Schuh
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Corresponding author

Correspondence to Weiwei Li.

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The GPS Tool Box is a column dedicated to highlighting algorithms and source code utilized by GPS engineers and scientists. If you have an interesting program or software package you would like to share with our readers, please pass it along; e-mail it to us at gpstoolbox@ngs.noaa.gov. To comment on any of the source code discussed here, or to download source code, visit our website at http://www.ngs.noaa.gov/gps-toolbox. This column is edited by Stephen Hilla, National Geodetic Survey, NOAA, Silver Spring, Maryland, and Mike Craymer, Geodetic Survey Division, Natural Resources Canada, Ottawa, Ontario, Canada.

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Zhou, F., Dong, D., Li, W. et al. GAMP: An open-source software of multi-GNSS precise point positioning using undifferenced and uncombined observations. GPS Solut 22, 33 (2018). https://doi.org/10.1007/s10291-018-0699-9

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