A three-dimensional time-dependent algorithm for ionospheric imaging using GPS
By Cathryn N. Mitchell. 2003
206 citations recorded by the source corpus.
Global Positioning System (GPS) satellite receivers provide a world-wide network of phase and group delay measurements. The combination of two-frequency measurements can be used to derive the integral of the electron concentration along each satellite-to-receiver path, a parameter known as the Total Electron Content (TEC). At this stage these slant TEC data are diffi cult to interpret as they originate from a combination of a temporally changing ionosphere and spatially changing observation geometry. In this paper TEC data are inverted to evaluate the underlying distribution and time evolution of electron concentration. Accordingly, a new three-dimensional, time-dependent algorithm is presented here for imaging ionospheric electron concentration using GPS signals. The inversion results in a three-dimensional movie rather than a static image of the electron-concentration distribution. The technique is demonstrated using simulated ground-based GPS data from actual measurement geometry over Europe.
Subfields: Astronomy and Astrophysics, Geophysics
View Paper: https://www.semanticscholar.org/paper/ff9a3ab7c71614c6a46cb0096c5f0d440268ff74
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In Astronomy and Astrophysics
In Geophysics
Citations in the corpus
- Statistics of total electron content depletions observed over the South American continent for the year 2008 (2011, methodology): “TEC values provided by dense networks of GPS receivers have also been used to reconstruct three‐dimensional maps of ionospheric densities [Ma et al., 2005; Lee et al., 2007, 2008; Mitchell and Spencer, 2003].”