Anisap project-analysis of normalised differential spectral attenuation technique for inter-satellite atmospheric profiling

In this paper the main objectives of the ESA-ANISAP study are summarized and the first results are presented. The existing end-to-end software simulation tool developed for a couple of counter-rotating Low Earth Orbiting (LEO) satellites has been upgraded and utilized for this work. The Integrated Water Vapor (IWV) - Spectral Sensitivity (SS) and the Integrated Liquid Water (ILW) - SS relationships are shown assuming the acquisition of IWV and ILW at 3,6, and 9 km tangent altitude jointly with that of SS at 17, 19, 21 and 32 GHz. Such relationships are obtained for a global set of atmospheric vertical profiles, in order to compute the regression coefficients of the IWV-SS and ILW-SS relationships based on a linear least squares fit.