Satellite-derived gravity having an impact on marine exploration
Satellite-derived gravity having an impact on marine exploration
复制标题
DOI：
10.1190/1.1487298
复制
发表时间：
2001-08
期刊：
影响因子：
3.3
通讯作者：
J. Fairhead;C. Green;M. Odegard
中科院分区：
文献类型：
--
作者：
J. Fairhead;C. Green;M. Odegard
将卫星测高得出的海面高度变化转换为自由空气重力并不新鲜。20世纪80年代初，威廉·哈克斯比(Lamont Doherty Geological Observatory)利用轨道间轨道间距约180公里的SeaSat卫星高度计数据绘制了第一张全球海洋重力图。哈克斯比的地图对板块构造理论产生了重大影响，因为海洋自由空气重力数据首次能够统一成像地球大洋地壳的构造结构。从那时起，在提高卫星重力分辨率方面做了大量工作。1995年取得了重大进展，当时公布了来自GeoSat和ERS-1卫星的大地测量任务的高度计数据。表1提供了这些卫星的详细情况。
Converting sea-surface height variations, derived from satellite altimetry, to free air gravity is not new. In the early 1980s William Haxby (Lamont Doherty Geological Observatory) produced the first global marine gravity map from SeaSat satellite altimeter data using interorbital track spacing of about 180 km. Haxby's map had a significant impact on plate tectonic theory because marine free-air gravity data were able for the first time to uniformly image the tectonic fabric of the earth's oceanic crust. Since that time, much effort has been applied to improving satellite-derived gravity resolution. A major advance occurred in 1995, when the altimeter data from Geodetic Missions (GM) of GeoSat and ERS-1 satellites were released. Table 1 gives details of these satellites.