Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius

The microwave radiometer (MWR) on board the SAC-D/Aquarius mission is a Dicke radiometer operating at 23.8 (H-Pol) and 36.5 GHz (H/V-Pol), which can provide ancillary data for the various retrievals to be performed with Aquarius regarding ocean and land applications. In this study, we report calibra...

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Publicado:	2015
Materias:	Cross calibration microwave radiometer (MWR) vicarious cold Windsat Calibration Microwave devices Brightness temperatures Dicke radiometers Homogeneous targets Land applications Microwave radiometers Onboard computers Statistical approach Radiometers Aquarius calibration error correction microwave radiometer sampling bias satellite data WindSat Sahel [Sub-Saharan Africa]
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19391404_v8_n12_p5462_Bruscantini http://hdl.handle.net/20.500.12110/paper_19391404_v8_n12_p5462_Bruscantini
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_19391404_v8_n12_p5462_Bruscantini
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spelling	paper:paper_19391404_v8_n12_p5462_Bruscantini2023-06-08T16:32:14Z Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius Cross calibration microwave radiometer (MWR) vicarious cold Windsat Calibration Microwave devices Brightness temperatures Cross calibration Dicke radiometers Homogeneous targets Land applications Microwave radiometers Onboard computers Statistical approach Radiometers Aquarius calibration error correction microwave radiometer sampling bias satellite data WindSat Sahel [Sub-Saharan Africa] The microwave radiometer (MWR) on board the SAC-D/Aquarius mission is a Dicke radiometer operating at 23.8 (H-Pol) and 36.5 GHz (H/V-Pol), which can provide ancillary data for the various retrievals to be performed with Aquarius regarding ocean and land applications. In this study, we report calibration results obtained by a land cross-calibration between Windsat and MWR. Moreover, MWR drifts were monitored using vicarious cold methodology. Results were generated for the 2011-2012 period using version V5.0 S of MWR data. MWR and Windsat cross-calibration was carried out over selected homogeneous targets which include tropical and boreal forests, desert, grassland, and the Sahel. As a result, biases were identified and corrections were proposed. Drifts in MWR observations were identified by implementing the vicarious cold method, which is a statistical approach that estimates the coldest value of the brightness temperature (Tb) (over ocean) histogram. Time series of such cold values are closely related to drifts in the instrument. In general, it was observed that MWR drifts tend to stabilize within 1 K after June 2012, when the software of the on-board computer was updated. © 2008-2012 IEEE. 2015 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19391404_v8_n12_p5462_Bruscantini http://hdl.handle.net/20.500.12110/paper_19391404_v8_n12_p5462_Bruscantini
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	Cross calibration microwave radiometer (MWR) vicarious cold Windsat Calibration Microwave devices Brightness temperatures Cross calibration Dicke radiometers Homogeneous targets Land applications Microwave radiometers Onboard computers Statistical approach Radiometers Aquarius calibration error correction microwave radiometer sampling bias satellite data WindSat Sahel [Sub-Saharan Africa]
spellingShingle	Cross calibration microwave radiometer (MWR) vicarious cold Windsat Calibration Microwave devices Brightness temperatures Cross calibration Dicke radiometers Homogeneous targets Land applications Microwave radiometers Onboard computers Statistical approach Radiometers Aquarius calibration error correction microwave radiometer sampling bias satellite data WindSat Sahel [Sub-Saharan Africa] Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius
topic_facet	Cross calibration microwave radiometer (MWR) vicarious cold Windsat Calibration Microwave devices Brightness temperatures Cross calibration Dicke radiometers Homogeneous targets Land applications Microwave radiometers Onboard computers Statistical approach Radiometers Aquarius calibration error correction microwave radiometer sampling bias satellite data WindSat Sahel [Sub-Saharan Africa]
description	The microwave radiometer (MWR) on board the SAC-D/Aquarius mission is a Dicke radiometer operating at 23.8 (H-Pol) and 36.5 GHz (H/V-Pol), which can provide ancillary data for the various retrievals to be performed with Aquarius regarding ocean and land applications. In this study, we report calibration results obtained by a land cross-calibration between Windsat and MWR. Moreover, MWR drifts were monitored using vicarious cold methodology. Results were generated for the 2011-2012 period using version V5.0 S of MWR data. MWR and Windsat cross-calibration was carried out over selected homogeneous targets which include tropical and boreal forests, desert, grassland, and the Sahel. As a result, biases were identified and corrections were proposed. Drifts in MWR observations were identified by implementing the vicarious cold method, which is a statistical approach that estimates the coldest value of the brightness temperature (Tb) (over ocean) histogram. Time series of such cold values are closely related to drifts in the instrument. In general, it was observed that MWR drifts tend to stabilize within 1 K after June 2012, when the software of the on-board computer was updated. © 2008-2012 IEEE.
title	Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius
title_short	Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius
title_full	Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius
title_fullStr	Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius
title_full_unstemmed	Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius
title_sort	land intercalibration and drift monitoring of mwr radiometer on board sac-d/aquarius
publishDate	2015
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_19391404_v8_n12_p5462_Bruscantini http://hdl.handle.net/20.500.12110/paper_19391404_v8_n12_p5462_Bruscantini
_version_	1768543008666419200

Land Intercalibration and Drift Monitoring of MWR Radiometer on Board SAC-D/Aquarius

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