References

AMT

Atmospheric Measurement Techniques

AMT

Atmos. Meas. Tech.

1867-8548

Copernicus Publications

Göttingen, Germany

10.5194/amt-4-659-2011

Retrieval of ozone profiles from GOMOS limb scattered measurements

Tukiainen

¹ Kyrölä

¹ Verronen

P. T.

¹ Fussen

² Blanot

³ Barrot

³ Hauchecorne

⁴ Lloyd

⁵

Finnish Meteorological Institute, Helsinki, Finland

Belgian Institute for Space Aeronomy, Brussels, Belgium

ACRI-ST, Sophia-Antipolis, France

Laboratoire Atmosphéres, Milieux, Observations Spatiales (LATMOS), Verriéres-le-Buisson, France

University of Saskatchewan, Saskatoon, Canada

04 04 2011

4 4 659 667

2011

This work is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this licence, visit https://creativecommons.org/licenses/by/3.0/

This article is available from https://amt.copernicus.org/articles/4/659/2011/amt-4-659-2011.html

The full text article is available as a PDF file from https://amt.copernicus.org/articles/4/659/2011/amt-4-659-2011.pdf

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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