Physics
Scientific paper
Dec 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994georl..21.2841h&link_type=abstract
Geophysical Research Letters, Volume 21, Issue 25, p. 2841-2844
Physics
Planetology: Solid Surface Planets: Gravitational Fields
Scientific paper
The method of least-square collocation (LSC) was used to construct a detailed gravity field over the Reykjanes Ridge using Seasat, Geosat, ERS-1, TOPEX/POSEIDON altimeter data and shipborne gravity data. Mean altimeter-derived geoid gradients, along with their standard deviations, were used in order to avoid cross-over adjustment of sea surface heights. The ship data were adjusted to a satellite-only gravity field using a quadratic polynomial in time and then merged with the satellite data to produce a combined gravity field. The necessary covariance functions were derived using the law of covariance propagation. In a test case, a comparison between a combined gravity field and ship data not included in the calculation yielded an rms difference of 2.31 mgals. The combined gravity field contains a wealth of short-wavelength information and clearly reveals the detailed tectonic structures associated with the Reykjanes ridge.
Bingham Andrew
Hwang Cheinway
Parsons Barry
Strange Theresa
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