Geomagnetism and Aeronomy

, Volume 55, Issue 6, pp 763–769 | Cite as

Influence of GPS/GLONASS differential code biases on the determination accuracy of the absolute total electron content in the ionosphere

  • Yu. V. YasyukevichEmail author
  • A. A. Mylnikova
  • V. E. Kunitsyn
  • A. M. Padokhin


Systematic error arises when the total electron content (TEC) is estimated with the simultaneous use of phase and code GPS/GLONASS measurements. This is related to the different signal propagation times at L1 and L2 frequencies in the radio frequency path of the transmitting and receiving equipment, the so-called differential code biases. A differential code bias of 1 ns results in an error of ~2.9 TECU when TEC is determined. Differential code bias variations on a long time interval, which were obtained at the CODE laboratory, were analyzed. It has been found that the systematic variation in these biases and considerable seasonal variations apparently caused by the environmental state (temperature and humidity), which sometimes reach 20 TECU (in TEC units), are observed for several stations. The algorithm for determining differential code biases at an individual station and the results of correction for absolute slant TEC are also presented. Presented results show algorithm effectiveness for various geographical regions and solar activity.


Global Navigation Satellite System Global Navigation Satellite System Total Electron Content Vertical Total Electron Content Differential Code Bias 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Pleiades Publishing, Ltd. 2015

Authors and Affiliations

  • Yu. V. Yasyukevich
    • 1
    Email author
  • A. A. Mylnikova
    • 1
  • V. E. Kunitsyn
    • 1
    • 2
  • A. M. Padokhin
    • 1
    • 2
  1. 1.Institute of Solar–Terrestrial Physics, Siberian BranchRussian Academy of Sciences (ISTP SB RAS)IrkutskRussia
  2. 2.Physical FacultyMoscow State UniversityMoscowRussia

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