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| Titel |
Error analysis of Abel retrieved electron density profiles from radio occultation measurements |
| VerfasserIn |
X. Yue, W. S. Schreiner, J. Lei, S. V. Sokolovskiy, C. Rocken, D. C. Hunt, Y.-H. Kuo |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 28, no. 1 ; Nr. 28, no. 1 (2010-01-21), S.217-222 |
| Datensatznummer |
250016756
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| Publikation (Nr.) |
 copernicus.org/angeo-28-217-2010.pdf |
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| Zusammenfassung |
| This letter reports for the first time the
simulated error distribution of radio occultation (RO) electron density
profiles (EDPs) from the Abel inversion in a systematic way. Occultation
events observed by the COSMIC satellites are simulated during the spring
equinox of 2008 by calculating the integrated total electron content (TEC)
along the COSMIC occultation paths with the "true" electron density from an
empirical model. The retrieval errors are computed by comparing the
retrieved EDPs with the "true" EDPs. The results show that the retrieved
NmF2 and hmF2 are generally in good agreement with the true values, but the
reliability of the retrieved electron density degrades in low latitude
regions and at low altitudes. Specifically, the Abel retrieval method
overestimates electron density to the north and south of the crests of the
equatorial ionization anomaly (EIA), and introduces artificial plasma caves
underneath the EIA crests. At lower altitudes (E- and F1-regions), it results
in three pseudo peaks in daytime electron densities along the magnetic
latitude and a pseudo trough in nighttime equatorial electron densities. |
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