Constrained simultaneous algebraic reconstruction technique (C-SART)-a new and simple algorithm applied to ionospheric tomography

Details Constrained simultaneous algebraic reconstruction technique (C-SART)-a new and simple algorithm applied to ionospheric tomography Constrained simultaneous algebraic reconstruction technique (C-SART)-a new and simple algorithm applied to ionospheric tomography

Jul 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ep%26s...60..727h&link_type=abstract

Earth, Planets and Space, Volume 60, p. 727-735.

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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.

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