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Marine Magnetic Data Holdings of World Data Center-a for Marine Geology and GeophysicsThe World Data Center-A for Marine Geology and Geophysics is co-located with the Marine Geology & Geophysical Data Center, Boulder, CO. Fifteen million digital marine magnetic trackline measurements are managed within the GEOphysical DAta System (GEODAS). The bulk of these data were collected with proton precision magnetometers under Transit Satellite navigational control. Along-track sampling averages about 1 sample per kilometer, while spatial density, a function of ship's track and survey pattern, range from 4 to 0.02 data points/sq. km. In the near future, the entire geophysical data set will be available on CD-ROM. The Marine Geology and Geophysics Division (World Data Center-A for MGG), of the National Geophysical Data Center, handles a broad spectrum of marine geophysical data, including measurements of bathymetry, magnetics, gravity, seismic reflection subbottom profiles, and side-scan images acquired by ships throughout the world's oceans. Digital data encompass the first three, while the latter two are in analog form, recorded on 35mm microfilm. The marine geophysical digital trackline data are contained in the GEODAS data base which includes 11.6 million nautical miles of cruise trackline coverage contributed by more than 70 organizations worldwide. The inventory includes data from 3206 cruises with 33 million digital records and indexing to 5.3 million track miles of analog data on microfilm.
Document ID
19920019382
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Sharman, George F.
(National Geophysical Data Center Boulder, CO, United States)
Metzger, Dan
(National Geophysical Data Center Boulder, CO, United States)
Date Acquired
September 6, 2013
Publication Date
June 1, 1992
Publication Information
Publication: NASA. Goddard Space Flight Center, Types and Characteristics of Data for Geomagnetic Field Modeling
Subject Category
Geophysics
Accession Number
92N28625
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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