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Stereo cloud-top heights and cloud fraction retrieval from ATSR-2

Muller, Jan Peter and Denis, Marie-Ange and Dundas, Rowan and Mitchell, Karl and Naud, Catherine and Mannstein, Hermann (2007) Stereo cloud-top heights and cloud fraction retrieval from ATSR-2. International Journal of Remote Sensing, 28 (9), pp. 1921-1938. DOI: 10.1080/01431160601030975.

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Official URL: http://www.informaworld.com/smpp/content~db=all~content=a778791302~frm=titlelink

Abstract

An operational processing system is described for the automated retrieval of cloud-top heights (CTHs) and amounts from the Gridded Brightness Temperature (GBT) 1 km product derived from the dual view of the Along Track Scanning Radiometer (ATSR-2) instrument onboard the ESA ERS-2 satellite. A new stereo matching algorithm, called M4 is described together with the overall processing chain for retrieving cloud-top heights and amounts. M4 is based on the successful stereo matchers, M2 and M3 which have been in operation with the NASA MISR sensor since March 2000 and which have also been applied to mapping cloud fraction in the polar region using ATSR-2 (Cawkwell and Bamber 2002, Cawkwell et al. 2001). Results in companion papers (Naud et al., Denis et al. 2007) describe the accuracy achieved using this algorithm and detailed scene-by-scene results are available from http:// cloudmap.org under results-.UCL-.ATSR-2 Validation. We assess the impact of cloud-top winds on the accuracy of the retrieved cloud-top heights and conclude that for most middle and lower tropospheric clouds, cloud-top winds will have little, if any, noticeable impact. We show how ATSR-2 cloud-top heights at the different wavelengths (particularly visible compared with thermal IR) can sometimes yield information on multi-layer clouds which is unique to ATSR-2. The processing system has recently been applied to three years of ASTR-2 GBT data and results are shown. These results are available from the British Atmospheric Data Centre (http://badc.nerc.ac.uk/data/list_all_datasets. html?source5data).

Document Type:Article
Title:Stereo cloud-top heights and cloud fraction retrieval from ATSR-2
Authors:
AuthorsInstitution or Email of Authors
Muller, Jan PeterUCL, Dorking-Surrey, UK
Denis, Marie-AngeDivision Technologies, Puteaux Cedex, F
Dundas, RowanOffice for National Statistics, London, UK
Mitchell, KarlJet Propulsion Lab., Pasadena, CA, USA
Naud, CatherineNASA, New York, NY, USA
Mannstein, HermannUNSPECIFIED
Date:2007
Journal or Publication Title:International Journal of Remote Sensing
Refereed publication:Yes
In Open Access:Yes
In ISI Web of Science:Yes
Volume:28
DOI:10.1080/01431160601030975
Page Range:pp. 1921-1938
Status:Published
Keywords:Image processing, matcher, stereo
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W EO - Erdbeobachtung
DLR - Research area:Space
DLR - Program:W EO - Erdbeobachtung
DLR - Research theme (Project):W - Vorhaben Atmosphären- und Klimaforschung (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Atmospheric Physics > Atmospheric Remote Sensing
Deposited By: Dr.rer.nat. Hermann Mannstein
Deposited On:25 Jun 2007
Last Modified:22 Mar 2011 10:03

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