Tomography of the ionospheric electron density with geostatistical inversion
In relation to satellite applications like global navigation satellite systems (GNSS) and remote sensing, the electron density distribution of the ionosphere has significant influence on trans-ionospheric radio signal propagation. In this paper, we develop a novel ionospheric tomography approach...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2015-08-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/33/1071/2015/angeo-33-1071-2015.pdf |
| Summary: | In relation to satellite applications like global navigation
satellite systems (GNSS) and remote sensing, the electron density
distribution of the ionosphere has significant influence on trans-ionospheric
radio signal propagation. In this paper, we develop a novel ionospheric
tomography approach providing the estimation of the electron density's
spatial covariance and based on a best linear unbiased estimator of the 3-D
electron density. Therefore a non-stationary and anisotropic covariance model
is set up and its parameters are determined within a maximum-likelihood
approach incorporating GNSS total electron content measurements and the
NeQuick model as background. As a first assessment this 3-D simple kriging
approach is applied to a part of Europe. We illustrate the
estimated covariance model revealing the different correlation lengths in
latitude and longitude direction and its non-stationarity. Furthermore, we show
promising improvements of the reconstructed electron densities compared to
the background model through the validation of the
ionosondes Rome, Italy (RO041), and Dourbes, Belgium (DB049), with electron density profiles for 1 day. |
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| ISSN: | 0992-7689 1432-0576 |