VALIDATION OF ETOPO5U IN THE HELLENIC AREA

被引：5

作者：

ARABELOS, D

机构：

[1] Department of Geodesy and Surveying, University of Thessaloniki, Thessaloniki

来源：

BULLETIN GEODESIQUE | 1994年 / 68卷 / 02期

关键词：

D O I：

10.1007/BF00819385

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

Mean 5' x 5' heights and depths from ETOPO5U (Earth Topography at 5' spacing Updated) Digital Terrain Model (DTM) were compared with corresponding quantities of a local DTM in the test area [38-degrees less-than-or-equal-to phi less-than-or-equal-to 40-degrees, 21-degrees less-than-or-equal-to lambda less-than-or-equal-to 240]. From this comparison a shift of ETOPO5U with respect to the local DTM in the longitudinal direction equal to 5 min was found after applying an efficient fast Fourier transform (FFT) technique. Furthermore, sparse mean height differences larger than 1,000 m were observed between ETOPO5U and the local DTM due rather to errors of ETOPO5U. The effect of these errors on gravity and height anomalies was computed in a subregion. of the area under consideration.

引用

页码：88 / 99

页数：12