Abstract
The purpose of this paper is to address the capabilities and needs of airborne early warning (AEW) radar. Radar-earth-target geometry, with its associated problems of atmospheric refraction, attenuation, and multipath effects . Relative aircraft-earth-target velocities, with the associated Doppler-processing challenges . Restrictions on frontal area and weight that limit antennas to relatively small sizes, which thereby contribute to poor angular resolution and increased Doppler spreading, complex aircraft/antenna geometry, which contributes to larger antenna sidelobes and distortion of the main lobe . Jamming and other electromagnetic interference. AEW radars use two basic modes of operation: (1) the Doppler mode to detect moving aircraft over land and sea, and (2) the ordinary pulse or non-Doppler mode for detecting stationary or slow-moving targets such as boats or ships. The longrange Doppler detection mode, with its requirements made stringent by operating from a moving platform, distinguishes the AEW radar from others.
Published Version
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