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