Aircraft ground velocity determination system

摘要: A system for determining the ground velocity of an aircraft is disclosed. The includes a CCD linear optical image sensor carried by forming first and second substantially instantaneous light intensity contour surface earth lying below aircraft. two contours are delayed in time with respect to each other. computer, included system, compares determine relative position shift between utilizing cross-correlation techniques. computer then corrects altitude divides corrected delay obtain velocity. signal indicative output system.