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| Titel |
Retrieval of vertical profiles of atmospheric refraction angles by inversion of optical dilution measurements |
| VerfasserIn |
D. Fussen, C. Tetard, E. Dekemper, D. Pieroux, N. Mateshvili, F. Vanhellemont, G. Franssens, P. Demoulin |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 8 ; Nr. 8, no. 8 (2015-08-05), S.3135-3145 |
| Datensatznummer |
250116520
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| Publikation (Nr.) |
 copernicus.org/amt-8-3135-2015.pdf |
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| Zusammenfassung |
| In this paper, we consider occultations of celestial bodies through the atmospheric limb
from low Earth orbit satellites and
we show how the usual change of tangent altitude associated
with atmospheric refraction is inseparably connected to a variation of the observed
apparent intensity, for extended and pointlike sources. We demonstrate,
in the regime of weak refraction angles, that atmospheric optical dilution
and image deformation are strictly concomitant. The approach leads to
the integration of a simple differential equation related to the observed
transmittance in the absence of other absorbing molecules along the
optical path. The algorithm does not rely on the absolute knowledge of the
radiometer pointing angle that is related to the accurate knowledge of the satellite attitude.
We successfully applied the proposed method to the measurements
performed by two past occultation experiments: GOMOS for stellar and
ORA for solar occultations. The developed algorithm (named ARID) will
be applied to the imaging of solar occultations in a forthcoming pico-satellite
mission. |
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