Volume 35 Issue 2
Mar.  2015
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KANG Juan, WANG Ling, HUANG Wende. Optimized Spherical Harmonic Function Model for Ionospheric Delay Correction[J]. Chinese Journal of Space Science, 2015, 35(2): 159-165. doi: 10.11728/cjss2015.02.159
Citation: KANG Juan, WANG Ling, HUANG Wende. Optimized Spherical Harmonic Function Model for Ionospheric Delay Correction[J]. Chinese Journal of Space Science, 2015, 35(2): 159-165. doi: 10.11728/cjss2015.02.159
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Optimized Spherical Harmonic Function Model for Ionospheric Delay Correction

doi: 10.11728/cjss2015.02.159 cstr: 32142.14.cjss2015.02.159
  • 1.

    College of Electrical and Information Engineering, Hunan University, Changsha 410073

  • 2.

    College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073

  • Received Date: 2014-04-30
  • Rev Recd Date: 2014-08-19
  • Publish Date: 2015-03-15
    Abstract
  • Aiming at the ionospheric delay correction of single-frequency receiver, this paper proposes an optimized low-order spherical harmonic function model. Firstly, the description method of optimized ionospheric delay correction model is discussed and the objective and restraint condition of optimizing coefficients are defined. Then, according the characteristics that coefficients can be encoded, method and steps of using genetic algorithms to optimize coefficients are presented. Lastly, the accuracy analysis and comparison are made with Klobuchar based on the the ionosphere VTEC produced by CODE. The results show that accuracy of the optimized model is improved. It has an improvement about 1～2 TECU than the low-order spherical harmonic function model with the same number of coefficients and can better reflect the daily change of VTEC and the characteristics which vary with latitude.

     

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