Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space
Of the satellite radiometer sensors, there has been only one instrument that provides any heritage at L-band: the Skylab S-194 instrument that operated in the 1970s. From an analysis of S-194 brightness temperature (Tb) sensitivity to SSS, SST and wind speed, Lerner & Hollinger (1976) concluded...
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ftdtic:ADA451491 2023-05-15T15:43:57+02:00 Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space Reul, Nicolas Tenerelli, Joseph Vandemark, Doug Chapron, Bertrand IFREMER CENTRE DE BREST PLOUZANE (FRANCE) LABORATOIRE D'OCEANOGRAPHIE SPATIALE 2005-07-25 text/html http://www.dtic.mil/docs/citations/ADA451491 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA451491 en eng http://www.dtic.mil/docs/citations/ADA451491 Approved for public release; distribution is unlimited. DTIC Cartography and Aerial Photography Physical and Dynamic Oceanography Cybernetics Operations Research *OCEAN SURFACE *SURFACE ROUGHNESS *SALINITY SYMPOSIA SATELLITE IMAGERY L BAND FRANCE RADIOMETERS COMPONENT REPORTS FOREIGN REPORTS BRIGHTNESS TEMPERATURE SKYLAB(SATELLITE) SEA SURFACE SALINITY SEA SURFACE EMISSIVITY SEA SURFACE TEMPERATURE Text 2005 ftdtic 2016-02-22T04:15:45Z Of the satellite radiometer sensors, there has been only one instrument that provides any heritage at L-band: the Skylab S-194 instrument that operated in the 1970s. From an analysis of S-194 brightness temperature (Tb) sensitivity to SSS, SST and wind speed, Lerner & Hollinger (1976) concluded that the wind speed dependence of L-band brightness temperature at nadir is about 0.16 K/knot. This is almost four times higher than what is predicted by recently developed sea surface emissivity models at L-band and twice the experimental value reported during the Bering Sea Experiments. To investigate the possible reasons for such discrepancies, two data sets acquired by the S-194 Skylab instrument from 1973-1974 missions are used in the present paper in conjunction with products from climate model reanalysis projects as ancillary data. The re-analyses shows that it is very likely that Lerner & Hollinger overpredicted the quasi-linear wind speed dependence of L-band sea surface emissivity at nadir by a factor of about 2, main discrepancies being due to different wind speed data used in the analysis. Still, we found that emissivity models for the foam free sea surface based on the small perturbation method underestimate the roughness impact at nadir by a factor of 2. Including the foam impact cannot explain all the differences. Presented at the International Geoscience and Remote Sensing Symposium (25th) (IGARSS 2005) held in Seoul, Korea on 25-29 Jul 2005. See also ADM001850, Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2005. ISBN 0-7803-9051-2 (DVD ROM); 0-7803-9050-4(pbk). Text Bering Sea Defense Technical Information Center: DTIC Technical Reports database Bering Sea |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Cartography and Aerial Photography Physical and Dynamic Oceanography Cybernetics Operations Research *OCEAN SURFACE *SURFACE ROUGHNESS *SALINITY SYMPOSIA SATELLITE IMAGERY L BAND FRANCE RADIOMETERS COMPONENT REPORTS FOREIGN REPORTS BRIGHTNESS TEMPERATURE SKYLAB(SATELLITE) SEA SURFACE SALINITY SEA SURFACE EMISSIVITY SEA SURFACE TEMPERATURE |
spellingShingle |
Cartography and Aerial Photography Physical and Dynamic Oceanography Cybernetics Operations Research *OCEAN SURFACE *SURFACE ROUGHNESS *SALINITY SYMPOSIA SATELLITE IMAGERY L BAND FRANCE RADIOMETERS COMPONENT REPORTS FOREIGN REPORTS BRIGHTNESS TEMPERATURE SKYLAB(SATELLITE) SEA SURFACE SALINITY SEA SURFACE EMISSIVITY SEA SURFACE TEMPERATURE Reul, Nicolas Tenerelli, Joseph Vandemark, Doug Chapron, Bertrand Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space |
topic_facet |
Cartography and Aerial Photography Physical and Dynamic Oceanography Cybernetics Operations Research *OCEAN SURFACE *SURFACE ROUGHNESS *SALINITY SYMPOSIA SATELLITE IMAGERY L BAND FRANCE RADIOMETERS COMPONENT REPORTS FOREIGN REPORTS BRIGHTNESS TEMPERATURE SKYLAB(SATELLITE) SEA SURFACE SALINITY SEA SURFACE EMISSIVITY SEA SURFACE TEMPERATURE |
description |
Of the satellite radiometer sensors, there has been only one instrument that provides any heritage at L-band: the Skylab S-194 instrument that operated in the 1970s. From an analysis of S-194 brightness temperature (Tb) sensitivity to SSS, SST and wind speed, Lerner & Hollinger (1976) concluded that the wind speed dependence of L-band brightness temperature at nadir is about 0.16 K/knot. This is almost four times higher than what is predicted by recently developed sea surface emissivity models at L-band and twice the experimental value reported during the Bering Sea Experiments. To investigate the possible reasons for such discrepancies, two data sets acquired by the S-194 Skylab instrument from 1973-1974 missions are used in the present paper in conjunction with products from climate model reanalysis projects as ancillary data. The re-analyses shows that it is very likely that Lerner & Hollinger overpredicted the quasi-linear wind speed dependence of L-band sea surface emissivity at nadir by a factor of about 2, main discrepancies being due to different wind speed data used in the analysis. Still, we found that emissivity models for the foam free sea surface based on the small perturbation method underestimate the roughness impact at nadir by a factor of 2. Including the foam impact cannot explain all the differences. Presented at the International Geoscience and Remote Sensing Symposium (25th) (IGARSS 2005) held in Seoul, Korea on 25-29 Jul 2005. See also ADM001850, Proceedings of the IEEE International Geoscience and Remote Sensing Symposium, 2005. ISBN 0-7803-9051-2 (DVD ROM); 0-7803-9050-4(pbk). |
author2 |
IFREMER CENTRE DE BREST PLOUZANE (FRANCE) LABORATOIRE D'OCEANOGRAPHIE SPATIALE |
format |
Text |
author |
Reul, Nicolas Tenerelli, Joseph Vandemark, Doug Chapron, Bertrand |
author_facet |
Reul, Nicolas Tenerelli, Joseph Vandemark, Doug Chapron, Bertrand |
author_sort |
Reul, Nicolas |
title |
Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space |
title_short |
Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space |
title_full |
Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space |
title_fullStr |
Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space |
title_full_unstemmed |
Reanalysis of Skylab S-194 L-band Data in View of Validating Sea Surface Roughness Corrections for Salinity Measurements from Space |
title_sort |
reanalysis of skylab s-194 l-band data in view of validating sea surface roughness corrections for salinity measurements from space |
publishDate |
2005 |
url |
http://www.dtic.mil/docs/citations/ADA451491 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA451491 |
geographic |
Bering Sea |
geographic_facet |
Bering Sea |
genre |
Bering Sea |
genre_facet |
Bering Sea |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA451491 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766378177714716672 |