Validation of Landsat Thematic Mapper-derived phytoplankton pigments through synchronous surface measurements: area off Calicut to Azhikal in the Arabian Sea

Narain, A and Dwivedi, R M and Solanki, H V and James, P S B R and Subbaraju, G and Balachandran, V K and Nandakumar, A and Khambadkar, L R and Sudarsan, D and Sivaprakasam, T E (1987) Validation of Landsat Thematic Mapper-derived phytoplankton pigments through synchronous surface measurements: area off Calicut to Azhikal in the Arabian Sea. CMFRI Bulletin : National Symposium on Research and Development in Marine Fisheries Sessions I & II 1987, 44 (Part -). pp. 182-187.

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Abstract

This paper deals with an estimation of phytoplankton pigments from Landsat Thematic Mapper (Tivi) data after removal of atmospheric effect. The pigments derived from Landsat TIV1 data of October, 1986 and March, 1987 have been compared with corresponding surface values measured during ship cruise programmes synchronous to satellite overpass. In-water algorithm for Landsat TM bands was developed from the sea data collected off Quilon to Malpe In the Arabian sea at different periods of the year. A uniform bias towards underestimation of pigments has been observed in the case of October data and an appropriate modification In the pigment algorithm for Landsat TM has bnen suggested.

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