High spectral and high spatial resolution images will be performed on-board satellites using a new instrument called a Fourier transform spectro-imager. Based on the principle of the Michelson interferometer, this instrument will give images in which each pixel is the whole spectrum of the observed point on Earth. After a description of the spectro-imager, the solution brought to the problem of transmission of these 'vector' images is presented. Straight transmission implies a very high bit rate (estimated at 126 Mbits/s). The first part of this paper is devoted to the scalar compression of each image pixel and a compression scheme is proposed.
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Mailhes et al. (1990) studied this question.
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