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| Titel |
Determination of the vertical electron-density profile in ionospheric tomography: experimental results |
| VerfasserIn |
C. N. Mitchell, L. Kersley, J. A. T. Heaton, S. E. Pryse |
| 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 ; 15, no. 6 ; Nr. 15, no. 6, S.747-752 |
| Datensatznummer |
250012835
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| Publikation (Nr.) |
 copernicus.org/angeo-15-747-1997.pdf |
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| Zusammenfassung |
| The reconstruction of the vertical
electron-density profile is a fundamental problem in ionospheric tomography.
Lack of near-horizontal ray paths limits the information available on the
vertical profile, so that the resultant image of electron density is biased in a
horizontal sense. The vertical profile is of great importance as it affects the
authenticity of the entire tomographic image. A new method is described whereby
the vertical profile is selected using relative total-electron-content
measurements. The new reconstruction process has been developed from modelling
studies. A range of background ionospheres, representing many possible peak
heights, scale heights and electron densities are formed from a Chapman profile
on the bottomside with a range of topside profiles. The iterative reconstruction
process is performed on all of these background ionospheres and a numerical
selection criterion employed to select the final image. The resulting
tomographic images show excellent agreement in electron density when compared
with independent verification provided by the EISCAT radar. |
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