학술논문
Bias-corrected GOCE geoid for the generation of high-resolution digital terrain model.
Document Type
Article
Source
Subject
*OCEAN circulation
*GEOID
*ARTIFICIAL satellites
*EARTH gravitation
*DIGITAL elevation models
*FLOODS
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Language
ISSN
0011-3891
Abstract
This study aims at deriving a geoid over India using the Gravity field and steady-state Ocean Circulation Explorer (GOCE) satellite, evaluate its accuracy and application potential. The main objective is to convert satellite-derived ellipsoid height to orthometric height using geoid derived from GOCE and convert an ellipsoid digital terrain model (DTM) to orthometric DTM for hydrology, flood undulation and coastal management. The study was carried out over two areas, viz. Kosi river basin, Bihar and Mahanadi river basin, Odisha. The results indicate that over a total of 148 benchmarks, the GOCE geoid has a bias of 1.5 m with reference to the ground geoid. The study also demonstrated that using benchmark data, it is feasible to derive a geoid from GOCE with 10-15 cm accuracy that would meet most of the user requirements. [ABSTRACT FROM AUTHOR]