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Validation of ERS-1 and high-resolution satellite gravity with in-situ shipborne gravity over the Indian offshore regions: Accuracies and implications to subsurface modeling

DRS at CSIR-National Institute of Oceanography

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Title Validation of ERS-1 and high-resolution satellite gravity with in-situ shipborne gravity over the Indian offshore regions: Accuracies and implications to subsurface modeling
 
Creator Chatterjee, S.
Bhattacharyya, R.
Michael, L.
Krishna, K.S.
Majumdar, T.J.
 
Subject gravity anomalies
geoid anomalies
satellite altimetry
energy spectra
 
Description Geoid and gravity anomalies derived from satellite altimetry are gradually gaining importance in marine geoscientific investigations. Keeping this in mind, we have validated ERS-1 (168 day repeat) altimeter data and very high-resolution free-air gravity data sets generated from Seasat, Geosat GM, ERS-1 and TOPEX/POSEIDON altimeters data with in-situ shipborne gravity data of both the Bay of Bengal and the Arabian Sea regions for the purpose of determining the consistencies and deviations. The RMS errors between high resolution satellite and ship gravity data vary from 2.7 to 6.0 mGal, while with ERS-1 data base the errors are as high as 16.5 mGal. We also have generated high resolution satellite gravity maps of different regions over the Indian offshore, which eventually have become much more accurate in extracting finer geological structures like 85 degrees E Ridge, Swatch of no ground, Bombay High in comparison with ERS-1 satellite-derived gravity maps. Results from the signal processing related studies over two specific profiles in the eastern and western offshore also clearly show the advantage of high resolution satellite gravity compared to the ERS-1 derived gravity with reference to ship gravity data.
 
Date 2008-08-06T06:51:03Z
2008-08-06T06:51:03Z
2007
 
Type Journal Article
 
Identifier Marine Geodesy, vol.30(3); 197-216p.
no
http://drs.nio.org/drs/handle/2264/1381
 
Language en
 
Rights Copyright [2007]. It is tried to respect the rights of the copyright holders to the best of the knowledge. If it is brought to our notice that the rights are violated then the item would be withdrawn.
 
Publisher Taylor & Francis