NASA NTRS · 19700000273
Very high frequency digital rangine system
Abstract
Digital ranging system measures slant range /from 500 feet to 200 nautical miles/ and provides digital range readout during range tracking between any two airborne vehicles.
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Sobel, S. E.. 1970-09-01. Very high frequency digital rangine system. https://ntrs.nasa.gov/citations/19700000273
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