Method of and apparatus for three color-echo ranging
Abstract
Abstract A METHOD OF AN APPARATUS UTILIZING THREE-COLOR ECHO RANGING WHEREIN THE RECEIVED SIGNAL FROM EACH OF THREE SUCCESSIVE RADAR OR HIGHER FREQUENCY TRANSMISSION PULSES AT SLIGHTLY DIFFERENT FREQUENCIES IS COUPLED TO A DIFFERENT ELECTRON GUN OF A THREE-COLOR CATHODE RAY TUBE. THE CATHODE RAY TUBE IS ACCORDINGLY SUCCESSIVELY SWEPT, FOR EXAMPLE, IN RED AT FO, IN BLUE AT FO+$F, AND IN GREEN AT FO+2$F, THEREBY PROVIDING A DISPLAY SHOWING THREE SETS OF SPATIALLY UNCORRELATED CLUTTER RETURNS AS RED, BLUE, AND GREEN DOTS WHICH ARE DIMENSIONALLY SEPARATED FROM EACH OTHER ON THE FACE OF THE CATHODE RAY TUBE. A TARGET, HOWEVER, AS DISTINGUISHED FROM CLUTTER PRODUCES A WHITE DOT WHICH IS THE COMBINATION OF RED, BLUE AND GREEN. SIGNAL STORAGE MEANS MAY BE INCLUDED WHERE THE CATHODE RAY TUBE PHOSPHORS HAVE A SHORT DECAY TIME COMPARED TO THE SECTOR SCAN TIME OF THE ECHO RANGING SYSTEM.
Inventors
- 👤 Norman E Pedersen
Bibliographic Details
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