ASCAT-B ocean calibration and wind product

ASCAT-B ocean calibration and wind product

2012 EUMETSAT Meteorological Satellite Conference. Session 6 - Satellite-Based Observations of the oceans, including by SENTINEL-3. 3-7 September 2012, Sopot, Poland.-- 8 pages, 6 figures

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Main Authors: Verspeek, Jeroen, Stoffelen, Ad, Verhoef, Anton, Portabella, Marcos, Vogelzang, J.
Format: comunicación de congreso biblioteca
Published: 2012-09-06
Online Access:http://hdl.handle.net/10261/93445
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spelling dig-icm-es-10261-934452022-01-31T15:50:29Z ASCAT-B ocean calibration and wind product Verspeek, Jeroen Stoffelen, Ad Verhoef, Anton Portabella, Marcos Vogelzang, J. 2012 EUMETSAT Meteorological Satellite Conference. Session 6 - Satellite-Based Observations of the oceans, including by SENTINEL-3. 3-7 September 2012, Sopot, Poland.-- 8 pages, 6 figures The Metop-B satellite with onboard the Advanced Scatterometer (ASCAT) has been successfully launched on September 17, 2012. The ASCAT instrument is a C-band vertically-polarized fan antennae beam system. ASCAT-B onboard Metop-B is identical to the already operational scatterometer ASCAT-A onboard Metop-A which was launched in 2006. Within the framework of the Ocean & Sea Ice (OSI) Satellite Application Facility (SAF), KNMI has developed an ocean calibration method, based on Numerical Weather Prediction (NWP) wind inputs, the so-called NWP Ocean Calibration (NOC). The NOC method resides in direct comparison of measured backscatter data with simulated backscatter data from NWP winds using a forward model or Geophysical Model Function (GMF). For ASCAT, the CMOD5.n GMF is used, which is compliant with the GMF of its predecessor, the European Remote-sensing Satellite (ERS) scatterometer. The radar backscatter triplets can be visualized in a 3-dimensional measurement space. For a given Wind Vector Cell (WVC), i.e., position across the swath, the measured triplets are distributed around the GMF, which constitutes a well-defined conical surface that depends on wind speed and wind direction only. Systematic displacements of the cloud of triplets in any direction of the 3D space are mainly due to absolute beam biases, which are adequately removed by the results of the NOC. The NOC corrections are furthermore split into a smooth incidence angle dependent part, which is to be included in the GMF, and a remaining antenna-dependent part (NOCa). The averaged NOC residuals over a longer period are used to calculate correction factors that are shown to improve the wind retrieval Peer Reviewed 2014-03-12T07:45:34Z 2014-03-12T07:45:34Z 2012-09-06 2014-03-12T07:45:35Z comunicación de congreso http://purl.org/coar/resource_type/c_5794 2012 EUMETSAT Meteorological Satellite Conference (2012) http://hdl.handle.net/10261/93445 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 2012 EUMETSAT Meteorological Satellite Conference. Session 6 - Satellite-Based Observations of the oceans, including by SENTINEL-3. 3-7 September 2012, Sopot, Poland.-- 8 pages, 6 figures
format comunicación de congreso
author Verspeek, Jeroen
Stoffelen, Ad
Verhoef, Anton
Portabella, Marcos
Vogelzang, J.
spellingShingle Verspeek, Jeroen
Stoffelen, Ad
Verhoef, Anton
Portabella, Marcos
Vogelzang, J.
ASCAT-B ocean calibration and wind product
author_facet Verspeek, Jeroen
Stoffelen, Ad
Verhoef, Anton
Portabella, Marcos
Vogelzang, J.
author_sort Verspeek, Jeroen
title ASCAT-B ocean calibration and wind product
title_short ASCAT-B ocean calibration and wind product
title_full ASCAT-B ocean calibration and wind product
title_fullStr ASCAT-B ocean calibration and wind product
title_full_unstemmed ASCAT-B ocean calibration and wind product
title_sort ascat-b ocean calibration and wind product
publishDate 2012-09-06
url http://hdl.handle.net/10261/93445
work_keys_str_mv AT verspeekjeroen ascatboceancalibrationandwindproduct
AT stoffelenad ascatboceancalibrationandwindproduct
AT verhoefanton ascatboceancalibrationandwindproduct
AT portabellamarcos ascatboceancalibrationandwindproduct
AT vogelzangj ascatboceancalibrationandwindproduct
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