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A125123 Decimal expansion of the semi-major axis (in meters) of the World Geodetic System 1984 Ellipsoid, second upgrade. 3
6, 3, 7, 8, 1, 3, 7 (list; constant; graph; refs; listen; history; text; internal format)



Closely aligned with ITRF93, Sep 29 1996 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.


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.


Table of n, a(n) for n=7..13.

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 Geodesics 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.


a = semi-major axis = 6378137 meters.


(* first do *) Needs["GeometricalGeodesy`ReferenceEllipsoids`"] (* then *) IntegerDigits@ semiMajor@ WGS84 (* incomplete coding completed by Robert G. Wilson v, Apr 17 2010 *)


Cf. A125124, A125125, A125126.

Sequence in context: A097676 A251780 A249542 * A133612 A221149 A070392

Adjacent sequences:  A125120 A125121 A125122 * A125124 A125125 A125126




Robert G. Wilson v and Thomas H. Meyer, Nov 21 2006



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Last modified January 17 06:41 EST 2019. Contains 319207 sequences. (Running on oeis4.)