Luca Facheris

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– This paper presents a novel multi-sensor image fusion algorithm, which extends pan-sharpening of multispectral (MS) data through intensity modulation to the integration of MS and SAR imagery. The method relies on SAR texture, extracted by ratioing the despeckled SAR image to its lowpass approximation. SAR texture is used to modulate the generalized(More)
—The objective of this paper is to proceed, by investigating the statistics of simulated measurements based on a large dataset of radiosonde profiles, to assess the feasibility of active systems providing water vapor profile information based on Earth-satellite multifrequency differential attenuation measurements made in the 18–22-GHz range. Recently, in(More)
—A theoretical analysis of the impact of clear-air tro-pospheric scintillation on a radio occultation link between two low Earth orbit satellites in K-and Ku-bands is presented, with particular reference to differential approaches for the measure of the total content of water vapor. The troposphere is described as a spherically symmetric turbulent medium(More)
NDSA (Normalized Differential Spectral Absorption) is a differential measurement method to estimate the total content of water vapor (IWV, Integrated Water Vapor) along a tropospheric propagation path between two Low Earth Orbit (LEO) satellites [1]. The NDSA approach is based on the conversion of a spectral parameter called " spectral sensitivity " ,(More)