Journal
IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
Volume 52, Issue 8, Pages 4696-4706Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TGRS.2013.2283736
Keywords
Computerized ionospheric tomography (CIT); Global Positioning System (GPS); ill-posed problem; ionospheric electron density (IED); total variation (TV) minimization in three dimensions combined with algebraic reconstruction technique (ART) (TV3D-ART)
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Funding
- National Natural Science Foundation of China [41174012, 41274022]
- National High Technology Research and Development Program of China [2013AA122502]
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The computerized ionospheric tomography usually involves solving an ill-posed inversion problem. The sparsity of Global Positioning System (GPS) stations and the limitation of projection angles lead to insufficient data acquisition, thereby preventing the accurate reconstruction of ionospheric-electron-density distributions. In this paper, we investigate and propose a 3-D iterative reconstruction algorithm based on the minimization of total variation under quiescent and disturbed ionospheric conditions. Numerical experiments on GPS simulation data and real data are discussed. In contrast to the improved algebraic reconstruction technique, the proposed algorithm exhibits significantly reconstruction accuracy.
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