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| Titel |
Retrieval of ozone profiles from GOMOS limb scattered measurements |
| VerfasserIn |
S. Tukiainen, E. Kyrölä, P. T. Verronen, D. Fussen, L. Blanot, G. Barrot, A. Hauchecorne, N. Lloyd |
| 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 ; 4, no. 4 ; Nr. 4, no. 4 (2011-04-04), S.659-667 |
| Datensatznummer |
250001926
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| Publikation (Nr.) |
 copernicus.org/amt-4-659-2011.pdf |
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| Zusammenfassung |
| The GOMOS (Global Ozone Monitoring by Occultation of Stars) instrument
on board the Envisat satellite measures the vertical composition of
the atmosphere using the stellar occultation technique. While the
night-time occultations of GOMOS have been proven to be of good quality, the
daytime occultations are more challenging due to weaker
signal-to-noise ratio. During daytime GOMOS measures limb scattered
solar radiation in addition to stellar radiation. In this paper we
introduce a retrieval method
that determines ozone profiles between 20–60 km from GOMOS limb
scattered solar radiances. GOMOS observations contain a considerable
amount of stray light at high altitudes. We introduce a method for removing stray light and
demonstrate its feasibility by comparing the corrected radiances
against those measured by the OSIRIS (Optical Spectrograph & Infra
Red Imaging System) instrument. For the retrieval of ozone profiles,
a standard onion peeling method is used. The first comparisons with other
data sets suggest that the retrieved ozone profiles in 22–50 km are
within 10% compared with the GOMOS night-time occultations and within 15%
compared with OSIRIS. GOMOS has measured about 350 000 daytime profiles since
2002. The retrieval method presented here makes this large amount of
data available for scientific use. |
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