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Mapping of sea bottom topography over western offshore, India using TOPEX/ERS-1 altimeter data

DRS at CSIR-National Institute of Oceanography

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Title Mapping of sea bottom topography over western offshore, India using TOPEX/ERS-1 altimeter data
 
Creator Mohanty, K.K.
Majumdar, T.J.
Kunte, P.D.
Srivastava, A.K.
 
Subject bottom topography
bathymetry
mapping
satellite altimetry
 
Description As bathymetry and geoid are highly correlated in the 50-300 km range, the satellite-derived geoid can be used in the mapping of bathymetry. An attempt has been made to assess the accuracy of predicting sea bottom topography/bathymetry through a convolution model using satellite altimeter data over the Indian offshore region. The study used TOPEX/POSEIDON as well as ERS-1 altimeter data, along with National Geophysical Data Centre (NGDC), USA ship-borne bathymetry data. The altimeter range data are corrected for atmospheric and ocanographic effects to generate the sea surface height (SSH) over the Indian offshore. The SSH along repeat altimeter passes over a period of 1 year are averaged to minimize the contribution due to dynamic sea surface topography in SSH. Cross-over corrections are applied to account for the orbital error in the altimetric observation. The corrected SSH has been used as an approximation to the marine geoid. The bathymetry is related with the geoid through a convolution model. The one-dimensional response function is computed in the frequency domain using some of the dat tracks for which both bathymetry and geoid data are available. The accuracy of the developed model is then assessed by applying it over the rest of the tracks
 
Date 2009-01-12T09:18:22Z
2009-01-12T09:18:22Z
1997
 
Type Journal Article
 
Identifier Acta Astronautica, Vol.41; 151-154p.
http://drs.nio.org/drs/handle/2264/2047
 
Language en
 
Rights Copyright [1997]. All efforts have been made to respect the copyright to the best of our knowledge. Inadvertent omissions, if brought to our notice, stand for correction and withdrawal of document from this repository.
 
Publisher Elsevier