Foliage Penetration (FOPEN) Radar Detection of Low Flying Aircraft
ARMY LAND WARFARE LAB ABERDEEN PROVING GROUND MD
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The report describes detection experiments performed with the Foliage Penetration FOPEN Radar operating at 140 MHz in which the target was a helicopter flying nap-of-the-earth NOE. Preliminary experiments performed in Hawaii during the user evaluation of the FOPEN system demonstrated the ability of this radar to detect helicopters flying NOE using foliage and terrain for cover. A series of experiments at Aberdeen Proving Ground were made to establish the detection ranges through foliage for a single UH-1 helicopter. Additional measurements of the radar cross section of the UH-1 on the ground were taken using the LWL Airborne Foliage Penetration Radar, and are also reported. The report concludes with a theoretical analysis of the propagation losses affecting the detection of aircraft flying NOE by radars operating at frequencies of from 100 to 10,000 MHz.
- Active and Passive Radar Detection and Equipment