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IJMS Vol.32(4) [December 2003] >


Title: Remote sensing of diffuse attenuation coefficient (K490) using IRS-P4 Ocean Colour Monitor (OCM) sensor
Authors: Chauhan, Prakash
Sahay, Arvind
Rajawat, A. S.
Nayak, Shailesh
Keywords: Arabian Sea
Bay of Bengal
diffuse attenuation coefficient
IRS-P4 OCM
Issue Date: Dec-2003
Publisher: CSIR
Abstract:  An algorithm relating the diffuse attenuation coefficient K(490) at 490 nm wavelengths to the ratio of normalized water-leaving radiance [Lwn(443)/Lwn(555)] has been developed through regression analysis of radiometric profiles obtained from three oceanographic cruises conducted in the north eastern Arabian Sea and off Orissa and Andhra coast in the Bay of Bengal. The regional K(490) algorithm has been applied on to the IRS-P4 Ocean Colour Monitor (OCM) satellite data and a limited validation of the algorithm has been performed for case I and case II waters off Gujarat coast in the Arabian Sea. The results of the satellite validation experiment conducted in the Arabian Sea for K(490) algorithm show that the algorithm captures very well the in situ K(490) values (RMS=0.011 m-1). The algorithm has also been validated for an independent in situ data set collected during SK-186 data collection campaign in the Arabian Sea; a good correlation was obtained for this data (r2 = 0.80, N=41).
Page(s): 279-284
ISSN: 0379-5136
Source:IJMS Vol.32(4) [December 2003]

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