The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.



(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A125124 Decimal expansion of the flattening (inverse) of the World Geodetic System 1984 ellipsoid, second upgrade. 3
2, 9, 8, 2, 5, 7, 2, 2, 3, 5, 6, 3 (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=3..14.

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.

Eric Weisstein's World of Mathematics, Oblate Spheroid.

WGS, World Geodetic System, 1984.

Wikipedia, World Geodetic System.


1/f = 298.257223563


(* first do *) Needs["GeometricalGeodesy`ReferenceEllipsoids`"] (* then *) RealDigits[ 1 / flattening@ WGS84, 10, 12][[1]] (* incomplete coding completed by Robert G. Wilson v, Apr 17 2010 *)


Cf. A125123, A125125, A125126.

Sequence in context: A199181 A011071 A329992 * A011446 A255189 A309211

Adjacent sequences:  A125121 A125122 A125123 * A125125 A125126 A125127




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



Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified September 24 06:24 EDT 2020. Contains 337317 sequences. (Running on oeis4.)