NASA NTRS · 19830000284
Improved Coal-Thickness Measurement
Abstract
Summed signals and dielectric-filled antenna improve measurement. Improved FM radar for measuring thickness of coal seam eliminates spectrum splitting and reduces magnitude of echo from front coal surface.
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Barr, T. A.. 1984-04-01. Improved Coal-Thickness Measurement. https://ntrs.nasa.gov/citations/19830000284
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