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ESA CAMELOT study: Challenges in future operational missions for GMES atmospheric monitoring, Sentinel 4 and 5

Pepijn Veefkind(1), Pieternel Levelt(1) and The CAMELOT Team(2)

(1) KNMI, PO-Box 201, 3730AE De Bilt, Netherlands
(2) -, -, -, Netherlands


The Sentinel 4 and 5 (precursor) missions are dedicated operational missions to monitor the atmospheric composition in the 2013-2020 timeframe and onward. The user requirements for the sentinel missions focus on monitoring the atmosphere from an environmental point of view (ozone layer, air quality and climate). ESA’s CAMELOT (Composition of the Atmospheric Mission concEpts and SentineL Observation Techniques) study is the follow-on study to ESA’s CAPACITY study finished in 2005. The general objective of the CAMELOT study is to further contribute to the definition of the air quality and climate protocol monitoring parts of the GMES Sentinel 4 and 5 missions. Key issues in the CAMELOT study are: (1) trade-offs between different observation strategies (spectral ranges, polarisation, direction etc) for aerosols and several trace gases

(2) a quantitative assessment of the requirements for spatio-temporal sampling taking into account the contamination of nadir-viewing observations by cloud (3) optimising several orbit scenario’s (leo, inclined leo, geo or any combination) and a contribution from the user’s perspective to the trade-off between different orbits.

In order to address these issues a large European consortium, lead by KNMI, has been formed by 9 European institutes (KNMI, RAL, U.Leicester, SRON, FMI, BIRA-IASB, CNR-IFAC,NOVELTIS and RIU-U.Koeln).

In the presentation an overview will be given of the CAMELOT study, including specific results for combined retrievals, cloud statistics for different orbit geometries and retrievals for several orbit scenarios.