Charting the Remote Southern Oceans With Geosat Altimetry
The Geosat satellite altimeter has mapped the marine gravity field over nearly all of the world's oceans to a high accuracy and high spatial resolution. In the wavelength band 15 to 200 km, variations in gravity anomaly are highly correlated with seafloor topography. Since many southern ocean a...
Main Authors: | , , , |
---|---|
Other Authors: | |
Format: | Text |
Language: | English |
Published: |
1993
|
Subjects: | |
Online Access: | http://www.dtic.mil/docs/citations/ADA263452 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA263452 |
id |
ftdtic:ADA263452 |
---|---|
record_format |
openpolar |
spelling |
ftdtic:ADA263452 2023-05-15T18:25:08+02:00 Charting the Remote Southern Oceans With Geosat Altimetry Sandwell, David T. Smith, Walter Mammerickx, Jacqueline Parker, Robert SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA GEOLOGICAL RESEARCH DIV 1993-04 text/html http://www.dtic.mil/docs/citations/ADA263452 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA263452 en eng http://www.dtic.mil/docs/citations/ADA263452 Approved for public release; distribution is unlimited. DTIC AND NTIS Physical and Dynamic Oceanography Geodesy *OCEANS *GRAVITATIONAL FIELDS *GRAVITY ANOMALIES DATA BASES ANOMALIES TOPOGRAPHY DEPTH COSTS BATHYMETRY PROFILES ALTIMETERS SEAMOUNTS GEOIDS OCEAN BOTTOM TOPOGRAPHY SOUTHERN HEMISPHERE ARTIFICIAL SATELLITES SHIPBOARD STANDARDS GRAVITY CHARTS BUDGETS GEOSAT SATELLITES Text 1993 ftdtic 2016-02-22T10:08:46Z The Geosat satellite altimeter has mapped the marine gravity field over nearly all of the world's oceans to a high accuracy and high spatial resolution. In the wavelength band 15 to 200 km, variations in gravity anomaly are highly correlated with seafloor topography. Since many southern ocean areas are sparsely surveyed, these new Geosat data reveal many previously unsurveyed features such as seamounts and fracture zones. The objectives of our proposed research were to: (1) Develop a method of combining geoid heights (or gravity anomalies) with shipboard profiles in order to improve bathymetric charts. (2) Evaluate the method by comparing bathymetric predictions with measured seafloor depths in two areas south of 60 deg S. (3) Produce an improved unclassified version of the Navy's standard bathymetric data base of the southern ocean (i.e. between 60 deg S and 72 deg S). (4) Produce an improved classified version of the Navy's standard bathymetric data base of the southern hemisphere (i.e. south of the equator). The original cost of the proposed research to be conducted over a 3 year period was $485,237. Due to a budget cut at DMA our budget was reduced to $40,000. Thus we completed only a small fraction of the proposed research as outlined in the attached progress reports. Text Southern Ocean Defense Technical Information Center: DTIC Technical Reports database Southern Ocean |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography Geodesy *OCEANS *GRAVITATIONAL FIELDS *GRAVITY ANOMALIES DATA BASES ANOMALIES TOPOGRAPHY DEPTH COSTS BATHYMETRY PROFILES ALTIMETERS SEAMOUNTS GEOIDS OCEAN BOTTOM TOPOGRAPHY SOUTHERN HEMISPHERE ARTIFICIAL SATELLITES SHIPBOARD STANDARDS GRAVITY CHARTS BUDGETS GEOSAT SATELLITES |
spellingShingle |
Physical and Dynamic Oceanography Geodesy *OCEANS *GRAVITATIONAL FIELDS *GRAVITY ANOMALIES DATA BASES ANOMALIES TOPOGRAPHY DEPTH COSTS BATHYMETRY PROFILES ALTIMETERS SEAMOUNTS GEOIDS OCEAN BOTTOM TOPOGRAPHY SOUTHERN HEMISPHERE ARTIFICIAL SATELLITES SHIPBOARD STANDARDS GRAVITY CHARTS BUDGETS GEOSAT SATELLITES Sandwell, David T. Smith, Walter Mammerickx, Jacqueline Parker, Robert Charting the Remote Southern Oceans With Geosat Altimetry |
topic_facet |
Physical and Dynamic Oceanography Geodesy *OCEANS *GRAVITATIONAL FIELDS *GRAVITY ANOMALIES DATA BASES ANOMALIES TOPOGRAPHY DEPTH COSTS BATHYMETRY PROFILES ALTIMETERS SEAMOUNTS GEOIDS OCEAN BOTTOM TOPOGRAPHY SOUTHERN HEMISPHERE ARTIFICIAL SATELLITES SHIPBOARD STANDARDS GRAVITY CHARTS BUDGETS GEOSAT SATELLITES |
description |
The Geosat satellite altimeter has mapped the marine gravity field over nearly all of the world's oceans to a high accuracy and high spatial resolution. In the wavelength band 15 to 200 km, variations in gravity anomaly are highly correlated with seafloor topography. Since many southern ocean areas are sparsely surveyed, these new Geosat data reveal many previously unsurveyed features such as seamounts and fracture zones. The objectives of our proposed research were to: (1) Develop a method of combining geoid heights (or gravity anomalies) with shipboard profiles in order to improve bathymetric charts. (2) Evaluate the method by comparing bathymetric predictions with measured seafloor depths in two areas south of 60 deg S. (3) Produce an improved unclassified version of the Navy's standard bathymetric data base of the southern ocean (i.e. between 60 deg S and 72 deg S). (4) Produce an improved classified version of the Navy's standard bathymetric data base of the southern hemisphere (i.e. south of the equator). The original cost of the proposed research to be conducted over a 3 year period was $485,237. Due to a budget cut at DMA our budget was reduced to $40,000. Thus we completed only a small fraction of the proposed research as outlined in the attached progress reports. |
author2 |
SCRIPPS INSTITUTION OF OCEANOGRAPHY LA JOLLA CA GEOLOGICAL RESEARCH DIV |
format |
Text |
author |
Sandwell, David T. Smith, Walter Mammerickx, Jacqueline Parker, Robert |
author_facet |
Sandwell, David T. Smith, Walter Mammerickx, Jacqueline Parker, Robert |
author_sort |
Sandwell, David T. |
title |
Charting the Remote Southern Oceans With Geosat Altimetry |
title_short |
Charting the Remote Southern Oceans With Geosat Altimetry |
title_full |
Charting the Remote Southern Oceans With Geosat Altimetry |
title_fullStr |
Charting the Remote Southern Oceans With Geosat Altimetry |
title_full_unstemmed |
Charting the Remote Southern Oceans With Geosat Altimetry |
title_sort |
charting the remote southern oceans with geosat altimetry |
publishDate |
1993 |
url |
http://www.dtic.mil/docs/citations/ADA263452 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA263452 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA263452 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766206357534408704 |