Constrained simultaneous algebraic reconstruction technique (C-SART) —a new and simple algorithm applied to ionospheric tomography
A simple and relatively fast method (C-SART) is presented for tomographic reconstruction of the electron density distribution in the ionosphere using smooth fields. Since it does not use matrix algebra, it can be implemented in a low-level programming language, which speeds up applications significa...
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| Veröffentlicht in: | Earth, planets, and space planets, and space, 2008-01, Vol.60 (7), p.727-735 |
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| container_title | Earth, planets, and space |
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| creator | Hobiger, Thomas Kondo, Tetsuro Koyama, Yasuhiro |
| description | A simple and relatively fast method (C-SART) is presented for tomographic reconstruction of the electron density distribution in the ionosphere using smooth fields. Since it does not use matrix algebra, it can be implemented in a low-level programming language, which speeds up applications significantly. Compared with traditional simultaneous algebraic reconstruction, this method facilitates both estimation of instrumental offsets and consideration of physical principles (expressed in the form of finite differences). Testing using a 2D scenario and an artificial data set showed that C-SART can be used for radio tomographic reconstruction of the electron density distribution in the ionosphere using data collected by global navigation satellite system ground receivers and low Earth orbiting satellites. Its convergence speed is significantly higher than that of classical SART, but it needs to be speeded up by a factor of 100 or more to enable it to be used for (near) real-time 3D tomographic reconstruction of the ionosphere. |
| doi_str_mv | 10.1186/BF03352821 |
| format | Article |
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| identifier | ISSN: 1343-8832 |
| ispartof | Earth, planets, and space, 2008-01, Vol.60 (7), p.727-735 |
| issn | 1343-8832 1880-5981 1880-5981 |
| language | eng |
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| source | SpringerNature Journals; Springer Nature OA Free Journals; EZB-FREE-00999 freely available EZB journals; Alma/SFX Local Collection |
| subjects | Cosmochemistry. Extraterrestrial geology Earth and Environmental Science Earth Sciences Earth, ocean, space Exact sciences and technology Geology Geophysics/Geodesy |
| title | Constrained simultaneous algebraic reconstruction technique (C-SART) —a new and simple algorithm applied to ionospheric tomography |
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