Global mean sea surface computation using GEOS 3 altimeter data
A mean sea surface map has been determined for the global ocean areas between +62 deg and -62 deg latitude using GEOS 3 altimeter data. A grid of laser reference orbits computed using the GEM 10B gravity model has been used to orient the altimeter data in a center of mass coordinate system. The dens...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19830039020 2023-05-15T17:45:31+02:00 Global mean sea surface computation using GEOS 3 altimeter data Marsh, J. G. Martin, T. V. Mccarthy, J. J. Unclassified, Unlimited, Publicly available Dec 10, 1982 http://ntrs.nasa.gov/search.jsp?R=19830039020 unknown http://ntrs.nasa.gov/search.jsp?R=19830039020 Accession ID: 83A20238 Copyright Other Sources 48 Journal of Geophysical Research; 87; Dec. 10 1982 ftnasantrs 2012-02-15T15:26:03Z A mean sea surface map has been determined for the global ocean areas between +62 deg and -62 deg latitude using GEOS 3 altimeter data. A grid of laser reference orbits computed using the GEM 10B gravity model has been used to orient the altimeter data in a center of mass coordinate system. The density of the altimeter tracks has enabled the computation of the sea surface heights above the reference ellipsoid on 1 deg x 1 deg grid in most of the oceanic areas. In the northwest Atlantic the dense coverage has enabled computations on a 0.25 deg x 0.25 deg grid. Comparisons of the global surface with an independently computed mean sea surface based upon SEASAT altimeter data indicate an rms agreement of a little over a meter. Comparisons of the regional solution in the northwest Atlantic with SEASAT profiles indicate a precision of a few decimeters in this surface. An analysis of the global crossover differences has indicated the possibility of a timing error in the altimeter data. Timing bias values of within 0.5 msec of 9.2 msec for 1975 and within 0.6 msec of 18.7 msec for 1976 have been recovered from an analysis of the altimeter data. Other/Unknown Material Northwest Atlantic NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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48 |
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48 Marsh, J. G. Martin, T. V. Mccarthy, J. J. Global mean sea surface computation using GEOS 3 altimeter data |
topic_facet |
48 |
description |
A mean sea surface map has been determined for the global ocean areas between +62 deg and -62 deg latitude using GEOS 3 altimeter data. A grid of laser reference orbits computed using the GEM 10B gravity model has been used to orient the altimeter data in a center of mass coordinate system. The density of the altimeter tracks has enabled the computation of the sea surface heights above the reference ellipsoid on 1 deg x 1 deg grid in most of the oceanic areas. In the northwest Atlantic the dense coverage has enabled computations on a 0.25 deg x 0.25 deg grid. Comparisons of the global surface with an independently computed mean sea surface based upon SEASAT altimeter data indicate an rms agreement of a little over a meter. Comparisons of the regional solution in the northwest Atlantic with SEASAT profiles indicate a precision of a few decimeters in this surface. An analysis of the global crossover differences has indicated the possibility of a timing error in the altimeter data. Timing bias values of within 0.5 msec of 9.2 msec for 1975 and within 0.6 msec of 18.7 msec for 1976 have been recovered from an analysis of the altimeter data. |
format |
Other/Unknown Material |
author |
Marsh, J. G. Martin, T. V. Mccarthy, J. J. |
author_facet |
Marsh, J. G. Martin, T. V. Mccarthy, J. J. |
author_sort |
Marsh, J. G. |
title |
Global mean sea surface computation using GEOS 3 altimeter data |
title_short |
Global mean sea surface computation using GEOS 3 altimeter data |
title_full |
Global mean sea surface computation using GEOS 3 altimeter data |
title_fullStr |
Global mean sea surface computation using GEOS 3 altimeter data |
title_full_unstemmed |
Global mean sea surface computation using GEOS 3 altimeter data |
title_sort |
global mean sea surface computation using geos 3 altimeter data |
publishDate |
1982 |
url |
http://ntrs.nasa.gov/search.jsp?R=19830039020 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Northwest Atlantic |
genre_facet |
Northwest Atlantic |
op_source |
Other Sources |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19830039020 Accession ID: 83A20238 |
op_rights |
Copyright |
_version_ |
1766148607954649088 |