A terrain correlation system for use in conjunction with {HEAD ~ an inertial navigation system} of {TAIL ~ a vehicle} is provided which can update position information and which is both independent of altitude and compatible with varying course paths 
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A terrain correlation system for use in conjunction with { HEAD ~ an inertial navigation system } of { TAIL ~ a vehicle } is provided which can update position information and which is both independent of altitude and compatible with varying course paths
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH