Passive Terrain Following (TF) Systems Composed of Digital Mapping and GPS,
NATIONAL AIR INTELLIGENCE CENTER WRIGHT-PATTERSON AFB OH
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The combination of the Global Positioning System GPS, which can provide sufficiently accurate airplane position, speed, and direction, with the digital mapping system, which can provide terrain data on the surroundings of an air route, can produce the TF controlling commands necessary for terrain-followIng flight. A terrain-following system composed of digital mapping and GPS is a passive system. It completely eliminates the possibility of exposure due to emission of electromagnetic waves.
- Cartography and Aerial Photography
- Air Navigation and Guidance
- Active and Passive Radar Detection and Equipment