An estimate of equatorial gravity from terrestrial and satellite data

Details An estimate of equatorial gravity from terrestrial and satellite data An estimate of equatorial gravity from terrestrial and satellite data

Jul 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987georl..14..730r&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 14, July 1987, p. 730-732.

Computer Science

Sound

19

Celestial Geodesy, Earth Gravitation, Equatorial Regions, Geoids, Gravity Anomalies, Satellite Sounding, Altimeters, Lageos (Satellite)

Scientific paper

Equatorial gravity has been estimated from terrestrial gravity data and from satellite implied data. The terrestrial estimate was based on the analysis of 43271 1°×1° mean free air gravity anomalies. The value estimated was 978032.35±0.5 mgals. An alternate estimate based on the comparison of terrestrial anomalies and altimeter derived anomalies yields 978032.6 mgals. Equatorial gravity from space data depends on GM from Lageos and lunar laser data and on a new estimate (6378136.2±0.5 m) of the equatorial radius. The resultant equatorial gravity is 978032.78±0.2 mgals. The difference between the two terrestrial estimates is 0.4 and 0.2 mgals. The agreement is within the accuracy of the two separate estimates. These comparisons can put constraints on parameters of non-Newtonian force models.

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