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Search: id:A125123
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| A125123 |
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Decimal expansion of the semi-major axis (in meters) of the World Geodetic System 1984 Ellipsoid, second upgrade. |
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+0
4
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OFFSET
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7,1
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COMMENT
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Closely aligned with ITRF93, 29 Sept 96 onwards.
The new World Geodetic System is called WGS 84. It is currently the reference system being used by the Global Positioning System. It is geocentric and globally consistent within +-1 m.
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REFERENCES
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H. Moritz, Geodetic Reference System 1980, Journal of Geodesy 74 (1): 128-162, 2000. (not WGS 84)
Thaddeus Vincenty, Direct and inverse solutions of geodesics on the ellipsoid with application of nested equations, Survey Review XXII (176): 88-93, 1975.
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LINKS
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Office of GEOINT Sciences, World Geodetic System 1984 (WGS 84).
U.S. Dept. of Commerce, NOAA, National Geodetic Survey, Survey Review, Thaddeus Vincenty, Direct and Inverse Solutions of Goedesics on the Ellipsoid with Application of Nested Equations, Vol. XXIII, No. 176, April, 1975. (an application)
U.S. Dept. of Defense, National Imagery and Mapping Agency, Technical Report, WGS 1984, Its Definition and Relationships with Local Geodetic Systems.
U.S. Dept. of Transportation, Federal Aviation Administration, Advisory Circular 90-45A, Appendix J, Computation of Geodesic Information, 2/21/75.
WGS, World Geodetic System, 1984.
Wikipedia, The Free Encyclopedia, World Geodetic System.
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EXAMPLE
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a = 6378137 meters.
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MATHEMATICA
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(* first do *) Needs["GeometricalGeodesy`ReferenceEllipsoids`"]
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CROSSREFS
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Cf. A125124, A125125, A125126.
Sequence in context: A073223 A011191 A097676 this_sequence A133612 A070392 A115371
Adjacent sequences: A125120 A125121 A125122 this_sequence A125124 A125125 A125126
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KEYWORD
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cons,nonn
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AUTHOR
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Robert G. Wilson v (rgwv(AT)rgwv.com) & Thomas H. Meyer (thomas.meyer(AT)uconn.edu), Nov 21 2006
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