An example of thermometry in volume by microwave radiometry

A method of determination of the size D depth z and temperature T0+ Delta T of a cylindrical thermal structure embedded in an homogeneous lossy material, in the present case, water, is presented. A microwave radiometric image at 3 GHz points out the location of the thermal structure; its threshold provides the diameter D of the structure. The depth z derives from the ratio of the maximal radiometric intensities at 1.5 and 3 GHz. The combination of D, z and of the radiometric intensities gives Delta T.<
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