Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar
A double inverse method to convert SAR data to estimates of current shear was developed theoretically. Problems of applying the technique to real SAR data were examined. The first step of the inversion process involved elimination of noise in the (x-vector, k-vector) wave spectra deduced from SAR im...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19900029088 2023-05-15T14:04:33+02:00 Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar Barnett, Tim P. Kelley, Francis Holt, Benjamin Unclassified, Unlimited, Publicly available Nov 15, 1989 http://ntrs.nasa.gov/search.jsp?R=19900029088 unknown http://ntrs.nasa.gov/search.jsp?R=19900029088 Accession ID: 90A16143 Copyright Other Sources 48 Journal of Geophysical Research; 94; 16087-16 1989 ftnasantrs 2012-02-15T18:23:38Z A double inverse method to convert SAR data to estimates of current shear was developed theoretically. Problems of applying the technique to real SAR data were examined. The first step of the inversion process involved elimination of noise in the (x-vector, k-vector) wave spectra deduced from SAR images. The second step, estimation of current shear, required the existence of well defined swell and a favorable single of interaction between swell and ocean current. Application of the method in the Antarctic circumpolar current encountered sea conditions that both satisfied and violated these requirements. Where the wave-current geometry was favorable, realistic surface current velocity fields were obtained, suggesting the presence of a substantial mesoscale eddy. Another attempt to apply the method in the Gulf Stream produced wave spectral estimates that showed no clear peak and hence produced no current estimates. Other/Unknown Material Antarc* Antarctic NASA Technical Reports Server (NTRS) Antarctic The Antarctic |
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Open Polar |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
language |
unknown |
topic |
48 |
spellingShingle |
48 Barnett, Tim P. Kelley, Francis Holt, Benjamin Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar |
topic_facet |
48 |
description |
A double inverse method to convert SAR data to estimates of current shear was developed theoretically. Problems of applying the technique to real SAR data were examined. The first step of the inversion process involved elimination of noise in the (x-vector, k-vector) wave spectra deduced from SAR images. The second step, estimation of current shear, required the existence of well defined swell and a favorable single of interaction between swell and ocean current. Application of the method in the Antarctic circumpolar current encountered sea conditions that both satisfied and violated these requirements. Where the wave-current geometry was favorable, realistic surface current velocity fields were obtained, suggesting the presence of a substantial mesoscale eddy. Another attempt to apply the method in the Gulf Stream produced wave spectral estimates that showed no clear peak and hence produced no current estimates. |
format |
Other/Unknown Material |
author |
Barnett, Tim P. Kelley, Francis Holt, Benjamin |
author_facet |
Barnett, Tim P. Kelley, Francis Holt, Benjamin |
author_sort |
Barnett, Tim P. |
title |
Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar |
title_short |
Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar |
title_full |
Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar |
title_fullStr |
Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar |
title_full_unstemmed |
Estimation of the two-dimensional ocean current shear field with a synthetic aperture radar |
title_sort |
estimation of the two-dimensional ocean current shear field with a synthetic aperture radar |
publishDate |
1989 |
url |
http://ntrs.nasa.gov/search.jsp?R=19900029088 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19900029088 Accession ID: 90A16143 |
op_rights |
Copyright |
_version_ |
1766275735084859392 |