Coherent Fourier transform radiometer for determining the thickness distribution of an oil film on a body of water based on the brightness temperature of the oil film and water over a range of radiation frequencies

摘要

A radiometer is described which coherently detects the thickness of oil films on water by converting continuous-frequency microwave or millimeter-wave brightness temperature versus frequency measurements from the frequency/wavenumber domain to the oil-film- thickness domain (received power versus film thickness) using Fourier- transform signal processing.