WindSat Polarmetric View of Greenland
WindSat is the first spaceborne microwave polarimetric radiometer that measures all four elements of the Stokes vector, the brightness temperatures at vertical and horizontal polarizations (TV and TH), and the real and imaginary parts of the cross-correlation of the vertical and horizontal polarizat...
Main Authors: | , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
2006
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/ADA517967 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA517967 |
id |
ftdtic:ADA517967 |
---|---|
record_format |
openpolar |
spelling |
ftdtic:ADA517967 2023-05-15T13:48:25+02:00 WindSat Polarmetric View of Greenland Li, L. Gaiser, P. NAVAL RESEARCH LAB WASHINGTON DC REMOTE SENSING DIV 2006 text/html http://www.dtic.mil/docs/citations/ADA517967 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA517967 en eng http://www.dtic.mil/docs/citations/ADA517967 Approved for public release; distribution is unlimited. DTIC Geology Geochemistry and Mineralogy Snow Ice and Permafrost Optics Radiofrequency Wave Propagation *SNOW *GREENLAND *POLARIMETRY RADIOMETERS GEOPHYSICS REMOTE DETECTION LAND ICE CLIMATE POLARIZATION REPRINTS SIGNATURES *WINDSAT *STOKES PARAMETERS MICROWAVE SIGNATURES STOKES VECTOR Text 2006 ftdtic 2016-02-23T00:24:42Z WindSat is the first spaceborne microwave polarimetric radiometer that measures all four elements of the Stokes vector, the brightness temperatures at vertical and horizontal polarizations (TV and TH), and the real and imaginary parts of the cross-correlation of the vertical and horizontal polarization known as the third and fourth Stokes parameters (TU and TF). WindSat was developed by NRL and had been in operation since January 2003. The polarimetric signatures of the third and fourth Stokes measurements are mostly related to the asymmetric structures of the ocean-wind-driven surface roughness. Prior to the launch of WindSat, it was a common belief that land polarimetric signatures at satellite footprint scales would be below the instrument noise level and would not carry any useful geophysical information. However, postlaunch data processing reveals significant land signals in the TU and TF, particularly over Greenland and the Antarctic ice sheets, which are the most environmentally sensitive Earth media, playing a significant role in global sea level and climate changes. Understanding this polarimetric signature, uniquely afforded by WindSat, and its relation with the snow properties and microstructures will have a profound impact on climate study. Published in 2006 NRL View (Remote Sensing), p1-3. Text Antarc* Antarctic Greenland Ice permafrost Defense Technical Information Center: DTIC Technical Reports database Antarctic The Antarctic Greenland |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Geology Geochemistry and Mineralogy Snow Ice and Permafrost Optics Radiofrequency Wave Propagation *SNOW *GREENLAND *POLARIMETRY RADIOMETERS GEOPHYSICS REMOTE DETECTION LAND ICE CLIMATE POLARIZATION REPRINTS SIGNATURES *WINDSAT *STOKES PARAMETERS MICROWAVE SIGNATURES STOKES VECTOR |
spellingShingle |
Geology Geochemistry and Mineralogy Snow Ice and Permafrost Optics Radiofrequency Wave Propagation *SNOW *GREENLAND *POLARIMETRY RADIOMETERS GEOPHYSICS REMOTE DETECTION LAND ICE CLIMATE POLARIZATION REPRINTS SIGNATURES *WINDSAT *STOKES PARAMETERS MICROWAVE SIGNATURES STOKES VECTOR Li, L. Gaiser, P. WindSat Polarmetric View of Greenland |
topic_facet |
Geology Geochemistry and Mineralogy Snow Ice and Permafrost Optics Radiofrequency Wave Propagation *SNOW *GREENLAND *POLARIMETRY RADIOMETERS GEOPHYSICS REMOTE DETECTION LAND ICE CLIMATE POLARIZATION REPRINTS SIGNATURES *WINDSAT *STOKES PARAMETERS MICROWAVE SIGNATURES STOKES VECTOR |
description |
WindSat is the first spaceborne microwave polarimetric radiometer that measures all four elements of the Stokes vector, the brightness temperatures at vertical and horizontal polarizations (TV and TH), and the real and imaginary parts of the cross-correlation of the vertical and horizontal polarization known as the third and fourth Stokes parameters (TU and TF). WindSat was developed by NRL and had been in operation since January 2003. The polarimetric signatures of the third and fourth Stokes measurements are mostly related to the asymmetric structures of the ocean-wind-driven surface roughness. Prior to the launch of WindSat, it was a common belief that land polarimetric signatures at satellite footprint scales would be below the instrument noise level and would not carry any useful geophysical information. However, postlaunch data processing reveals significant land signals in the TU and TF, particularly over Greenland and the Antarctic ice sheets, which are the most environmentally sensitive Earth media, playing a significant role in global sea level and climate changes. Understanding this polarimetric signature, uniquely afforded by WindSat, and its relation with the snow properties and microstructures will have a profound impact on climate study. Published in 2006 NRL View (Remote Sensing), p1-3. |
author2 |
NAVAL RESEARCH LAB WASHINGTON DC REMOTE SENSING DIV |
format |
Text |
author |
Li, L. Gaiser, P. |
author_facet |
Li, L. Gaiser, P. |
author_sort |
Li, L. |
title |
WindSat Polarmetric View of Greenland |
title_short |
WindSat Polarmetric View of Greenland |
title_full |
WindSat Polarmetric View of Greenland |
title_fullStr |
WindSat Polarmetric View of Greenland |
title_full_unstemmed |
WindSat Polarmetric View of Greenland |
title_sort |
windsat polarmetric view of greenland |
publishDate |
2006 |
url |
http://www.dtic.mil/docs/citations/ADA517967 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA517967 |
geographic |
Antarctic The Antarctic Greenland |
geographic_facet |
Antarctic The Antarctic Greenland |
genre |
Antarc* Antarctic Greenland Ice permafrost |
genre_facet |
Antarc* Antarctic Greenland Ice permafrost |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA517967 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766249225642835968 |