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      https://www.ias.ac.in/article/fulltext/jess/124/02/0283-0289

    • Keywords

       

      Ionospheric tomography; Gauss weighted function; electron density; constrained adaptive simultaneous algebraic reconstruction technique; GPS.

    • Abstract

       

      In this paper, a constrained adaptive simultaneous algebraic reconstruction technique (CASART) is presented to obtain high-quality reconstructions from insufficient projections. According to the continuous smoothness of the variations of ionospheric electron density (IED) among neighbouring voxels, Gauss weighted function is introduced to constrain the tomography system in the new method. It can resolve the dependence on the initial values for those voxels without any GPS rays traversing them. Numerical simulation scheme is devised to validate the feasibility of the new algorithm. Some comparisons are made to demonstrate the superiority of the new method. Finally, the actual GPS observations are applied to further validate the feasibility and superiority of the new algorithm.

    • Author Affiliations

       

      Wen Debao1 Zhang Xiao1 Tong Yangjin1 Zhang Guangsheng2 Zhang Min1 Leng Rusong1

      1. School of Traffic and Transportation Engineering, Changsha University of Science & Technology, Changsha 410004, China.
      2. School of Surveying and Land Information Engineering, Henan Polytechnic University, Jiaozuo 454000, China.
    • Dates

       
  • Journal of Earth System Science | News

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