A DETAILED GRAVITY-FIELD OVER THE REYKJANES RIDGE FROM SEASAT, GEOSAT, ERS-1 AND TOPEX/POSEIDON ALTIMETRY AND SHIP-BORNE GRAVITY

被引：3

作者：

HWANG, C ^{[1
]}

PARSONS, B ^{[1
]}

STRANGE, T ^{[1
]}

BINGHAM, A ^{[1
]}

机构：

[1] UNIV OXFORD,DEPT EARTH SCI,OXFORD OX1 3PR,ENGLAND

来源：

GEOPHYSICAL RESEARCH LETTERS | 1994年 / 21卷 / 25期

关键词：

D O I：

10.1029/94GL02268

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The method of least-squares 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-wave length information and clearly reveals the detailed tectonic structures associated with the Reykjanes Ridge.

引用

页码：2841 / 2844

页数：4

共 16 条

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