Hawaiian Islands North-South Deflections (DEFLEC96)
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title: Hawaiian Islands North-South Deflections (DEFLEC96)
date: (CI_Date)
date: 1999-01-01
dateType: (CI_DateTypeCode) publication
edition: 1999 Edition
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abstract: This 2' surface deflection of the vertical grid for the Principal Hawaiian Islands is the DEFLEC96 model. The computation used about 61,000 terrestrial and marine gravity data held in the National Geodetic Survey gravity data base in July 1996. These data were augmented by gravity data contributions from NGA (former National Imagery and Mapping Agency (former Defence Mapping Agency)). The deflections were obtained by numerical differentiation of cubic spline models along the meridians of the GEOID96 grid. The gravity values are based on the International Gravity Standardization Net 1971 (IGSN71). The deflections are referred to the Geodetic Reference System 1980 (GRS80) ellipsoidal normals. The curvature of the plumb line correction has been applied. We are particularly grateful to NGA (former National Imagery and Mapping Agency) for their assistance and their data contributions.
purpose: To provide easy access to global and regional gravity data and related models for scientific studies.
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keyword: Absolute Gravity
keyword: Bouguer Gravity
keyword: Free Air Anomaly
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keyword: Observed Gravity
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keyword: North and Central America>United States>Hawaii
keyword: Oceania>Hawaiian Islands
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keyword: Continent>North America>United States of America>Hawaii
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keyword: DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce
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otherConstraints: Distribution liability: NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
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otherConstraints: Use Constraints: If you use this data, please cite the National Geophysical Data Center and the originator of the data.
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descriptor: Value, in milligals of an observed gravity station value, after various corrections have been applied to the value.
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turnaround: 4 Days
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description: NOAA created the National Centers for Environmental Information (NCEI) by merging NOAA's National Climatic Data Center (NCDC), National Geophysical Data Center (NGDC), and National Oceanographic Data Center (NODC), including the National Coastal Data Development Center (NCDDC), per the Consolidated and Further Continuing Appropriations Act, 2015, Public Law 113-235. NCEI launched publicly on April 22, 2015.
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nameOfMeasure: Horizontal Positional Accuracy Report
evaluationMethodDescription: Horizontal accuracy varies from source contributor to source contributor. However, horizontal positions are usually taken from topographic maps of the area being surveyed. Accuracy may range up to +/- 100 feet.
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evaluationMethodDescription: Vertical accuracy varies from source contributor to source contributor. However, vertical positions are usually taken from topographic maps of the area being surveyed, monumented benchmark locations, or they are determined by the use of the Global Positioning System (GPS). Accuracy may range from meters to centimeters or better.
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identifier: meters
unitsSystem: http://www.bipm.org/en/measurement-units/
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Record: Variable: the average acceleration on the Earth's surface is about 980 centimeters per second squared, which is equal to 980 gals, but increases by about 1/2 percent from equator to pole.
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description: Source Contribution: Gravity survey data Source Type: varies
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title: Hawaiian Islands North-South Deflections (DEFLEC96)
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dateOfNextUpdate: 2011-04-23
maintenanceNote: This metadata was automatically generated from the Content Standards for Digital Geospatial Metadata standard (version FGDC-STD-001-1998) using the 2012-08-08 version of the FGDC RSE to ISO 19115-2 transform.
maintenanceNote: Translated from FGDC 2012-10-10T10:32:26.913-06:00
maintenanceNote: Last Metadata Review Date: 2017-09-25
maintenanceNote: This record has been automatically modified to include references to NCEI where applicable on 2015-09-01.
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