The decay of the spectrum of the gravitational potential and the topography for the earth

Details The decay of the spectrum of the gravitational potential and the topography for the earth The decay of the spectrum of the gravitational potential and the topography for the earth

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989geoji..99..449r&link_type=abstract

Geophysical Journal International (ISSN 0955-419X), vol. 99, Dec. 1989, p. 449-455.

Physics

20

Earth Gravitation, Geopotential, Spectrum Analysis, Spherical Harmonics, Topography, Geodesy, Power Spectra, Satellite Altimetry

Scientific paper

The spectrum of the earth's gravitational potential and topography, as represented by spherical harmonic expansions to degree 180, have been computed. Modeling the decay in the form of (A x l) exp-Beta, values of A and Beta for several degree (l) ranges were computed. For degree range 5-180, Beta was 2.54 for the potential and 2.16 for equivalent rock topography. The potential decay was somewhat slower than that implied by Kaula's rule. However, at high degree ranges, the Beta values were larger agreeing better with recent determinations from terrestrial gravity data and geoid undulations implied by satellite altimetric data. The values imply that the potential decays faster at higher l values.

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