Analysis of the ASCAT inversion residual for quality control and forward modelling improvement

Analysis of the ASCAT inversion residual for quality control and forward modelling improvement

Analysis of ASCAT inversion residual for QC and GMF improvement.-- 37 pages, 16 figures, 4 tables

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Main Authors: Portabella, Marcos, Stoffelen, Ad, Lin, Wenming, Verhoef, Anton, Verspeek, Jeroen
Format: informe técnico biblioteca
Published: 2012-04-18
Online Access:http://hdl.handle.net/10261/100791
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spelling dig-icm-es-10261-1007912019-03-05T11:23:52Z Analysis of the ASCAT inversion residual for quality control and forward modelling improvement Portabella, Marcos Stoffelen, Ad Lin, Wenming Verhoef, Anton Verspeek, Jeroen Analysis of ASCAT inversion residual for QC and GMF improvement.-- 37 pages, 16 figures, 4 tables An important part of the scatterometer wind data processing is the quality control (QC). This report shows the implementation of a new scatterometer QC procedure, based on a comprehensive analysis of the wind inversion residual, which significantly improves the effectiveness of the wind data QC. The method is applied on the Advanced Scatterometer (ASCAT) onboard Metop-A, but is generic and can therefore be applied to any scatterometer system. The method is also used to analyse the C-band geophysical model function (CMOD5n). It turns out that for winds around 4 m/s, the GMF does not match the ASCAT measurements, therefore indicating a GMF misfit or error. In this study, the rain impact on the ASCAT QC and retrieved winds is thoroughly investigated using the European Centre for Medium-range Weather Forecasts (ECMWF) model winds, the Tropical Rainfall Measuring Mission’s (TRMM) Microwave Imager (TMI) rain data, and tropical buoy wind and precipitation data as reference. In contrast to Ku-band, it is shown that C-band is much less affected by direct rain effects, such as ocean splash, but effects of increased wind variability appear to dominate ASCAT wind retrieval. ECMWF winds do not well resolve the air flow under rainy conditions. ASCAT winds do, but also show artefacts in both the wind speed and the wind direction distributions for high rain rates. The operational QC proves to be effective in screening these artefacts, but at the expense of many valuable winds The work has been funded under the EUMETSAT Ocean and Sea Ice (OSI) Satellite Application Facility (SAF) Associated Scientist project (reference CDOP-SG06-VS03) Peer Reviewed 2014-08-11T10:17:15Z 2014-08-11T10:17:15Z 2012-04-18 2014-08-11T10:17:15Z informe técnico http://purl.org/coar/resource_type/c_18gh Ocean and Sea Ice SAF Technical Note 193 (2012) http://hdl.handle.net/10261/100791 SAF/OSI/CDOP/KNMI/TEC/TN/193 open
institution ICM ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-icm-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del ICM España
description Analysis of ASCAT inversion residual for QC and GMF improvement.-- 37 pages, 16 figures, 4 tables
format informe técnico
author Portabella, Marcos
Stoffelen, Ad
Lin, Wenming
Verhoef, Anton
Verspeek, Jeroen
spellingShingle Portabella, Marcos
Stoffelen, Ad
Lin, Wenming
Verhoef, Anton
Verspeek, Jeroen
Analysis of the ASCAT inversion residual for quality control and forward modelling improvement
author_facet Portabella, Marcos
Stoffelen, Ad
Lin, Wenming
Verhoef, Anton
Verspeek, Jeroen
author_sort Portabella, Marcos
title Analysis of the ASCAT inversion residual for quality control and forward modelling improvement
title_short Analysis of the ASCAT inversion residual for quality control and forward modelling improvement
title_full Analysis of the ASCAT inversion residual for quality control and forward modelling improvement
title_fullStr Analysis of the ASCAT inversion residual for quality control and forward modelling improvement
title_full_unstemmed Analysis of the ASCAT inversion residual for quality control and forward modelling improvement
title_sort analysis of the ascat inversion residual for quality control and forward modelling improvement
publishDate 2012-04-18
url http://hdl.handle.net/10261/100791
work_keys_str_mv AT portabellamarcos analysisoftheascatinversionresidualforqualitycontrolandforwardmodellingimprovement
AT stoffelenad analysisoftheascatinversionresidualforqualitycontrolandforwardmodellingimprovement
AT linwenming analysisoftheascatinversionresidualforqualitycontrolandforwardmodellingimprovement
AT verhoefanton analysisoftheascatinversionresidualforqualitycontrolandforwardmodellingimprovement
AT verspeekjeroen analysisoftheascatinversionresidualforqualitycontrolandforwardmodellingimprovement
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