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Radiometric sensing of biological layered media
Author(s) -
Bardati Fernando,
Solimini Domenico
Publication year - 1983
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/rs018i006p01393
Subject(s) - brightness temperature , microwave , brightness , radiometry , weighting , radiative transfer , polarization (electrochemistry) , inverse problem , optics , thermal , remote sensing , physics , geology , mathematics , acoustics , chemistry , meteorology , mathematical analysis , quantum mechanics
The retrieval of temperature profiles in layered living tissues from microwave radiometric measurements is considered. The brightness temperature of a layered biological structure is expressed as a function of the thermal distribution in the tissues for different microwave frequencies, angles of observation, and polarization of the emitted waves. A “coherent” approach to the radiative transfer problem is followed to obtain the weighting functions in closed form for use in the inverse problem. Finally, the extraction of the thermal profiles from brightness data sets by use of Kalman filtering is discussed, with particular reference to the detectability of deep thermal anomalies.