Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure
In order to demonstrate the feasibility of the microwave radiometers to be carried aboard the Nimbus 5 and 6 satellites and proposed for one of the earth observatory satellites, remote measurements of microwave radiation at wavelengths ranging from 0.8 to 21 cm have been made of a variety of the ear...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19720021659 2023-05-15T18:17:24+02:00 Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure Wilheit, T. T. Gloersen, P. Schmugge, T. J. Unclassified, Unlimited, Publicly available Jan 21, 1972 application/pdf http://hdl.handle.net/2060/19720021659 unknown Document ID: 19720021659 Accession ID: 72N29309 http://hdl.handle.net/2060/19720021659 No Copyright CASI INSTRUMENTATION AND PHOTOGRAPHY 4th Ann. Earth Resources Program Rev., Vol. 1; 19 p 1972 ftnasantrs 2016-06-11T22:58:52Z In order to demonstrate the feasibility of the microwave radiometers to be carried aboard the Nimbus 5 and 6 satellites and proposed for one of the earth observatory satellites, remote measurements of microwave radiation at wavelengths ranging from 0.8 to 21 cm have been made of a variety of the earth's surfaces from the NASA CV-990 A/C. Brightness temperatures of sea water surfaces of varying roughness, of terrain with varying soil moisture, and of sea ice of varying structure were observed. In each case, around truth information was available for correlation with the microwave brightness temperature. The utility of passive microwave radiometry in determining ocean surface wind speeds, at least for values higher than 7 meters/second has been demonstrated. In addition, it was shown that radiometric signatures can be used to determine soil moisture in unvegetated terrain to within five percentage points by weight. Finally, it was demonstrated that first year thick, multi-year, and first year thin sea ice can be distinguished by observing their differing microwave emissivities at various wavelengths. Other/Unknown Material Sea ice NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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unknown |
topic |
INSTRUMENTATION AND PHOTOGRAPHY |
spellingShingle |
INSTRUMENTATION AND PHOTOGRAPHY Wilheit, T. T. Gloersen, P. Schmugge, T. J. Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure |
topic_facet |
INSTRUMENTATION AND PHOTOGRAPHY |
description |
In order to demonstrate the feasibility of the microwave radiometers to be carried aboard the Nimbus 5 and 6 satellites and proposed for one of the earth observatory satellites, remote measurements of microwave radiation at wavelengths ranging from 0.8 to 21 cm have been made of a variety of the earth's surfaces from the NASA CV-990 A/C. Brightness temperatures of sea water surfaces of varying roughness, of terrain with varying soil moisture, and of sea ice of varying structure were observed. In each case, around truth information was available for correlation with the microwave brightness temperature. The utility of passive microwave radiometry in determining ocean surface wind speeds, at least for values higher than 7 meters/second has been demonstrated. In addition, it was shown that radiometric signatures can be used to determine soil moisture in unvegetated terrain to within five percentage points by weight. Finally, it was demonstrated that first year thick, multi-year, and first year thin sea ice can be distinguished by observing their differing microwave emissivities at various wavelengths. |
format |
Other/Unknown Material |
author |
Wilheit, T. T. Gloersen, P. Schmugge, T. J. |
author_facet |
Wilheit, T. T. Gloersen, P. Schmugge, T. J. |
author_sort |
Wilheit, T. T. |
title |
Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure |
title_short |
Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure |
title_full |
Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure |
title_fullStr |
Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure |
title_full_unstemmed |
Microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure |
title_sort |
microwave emission measurements of sea surface roughness, soil moisture, and sea ice structure |
publishDate |
1972 |
url |
http://hdl.handle.net/2060/19720021659 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
CASI |
op_relation |
Document ID: 19720021659 Accession ID: 72N29309 http://hdl.handle.net/2060/19720021659 |
op_rights |
No Copyright |
_version_ |
1766191599784558592 |