• Lakshmi Bhaduri

      Articles written in Journal of Earth System Science

    • Wind dependence of quasi-specular sea scatter

      Abhijit Sarkar Lakshmi Bhaduri

      More Details Abstract Fulltext PDF

      Earlier investigations have shown that a power law relationship of the typeσ=aWb exists between the scattering coefficientσ and sea surface wind speedW at microwave frequencies. The coefficientsa andb are usually quoted for different frequencies, look angles, polarizations etc. This paper attempts to define the angular dependence using such a power law relationship in the quasi-specular range.

    • Retrieval of cloud classification parameters using two-dimensional fast Fourier transform

      M Mohan Lakshmi Bhaduri Vijay K Agarwal

      More Details Abstract Fulltext PDF

      A method is presented for the retrieval of classification parameters of clouds observed by satellite-borne imaging systems. It is based on a two-dimensional fast Fourier transform of cloud images and an analysis of their power spectra. The parameters retrieved provide quantitative information on mean brightness, size, shape and directional properties of clouds. The efficacy of the subdivision of the original cloud image into smaller regions and the determination of individual parameters is demonstrated by applying this procedure to some NOAA and INSAT cloud images.

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