By piggybacking a millimeter wave radar onto an X-band instrumentation radar, the Navy has come up with an accurate method of tracking targets close to the horizon. Usually at low-elevation angles, error is introduced by a portion of the echo signal being reflected from the ocean or the earth's surface, which cane nter the main lobe or close-by sidelobes. As elevation angles become less than two beamwidths, the multipath errors become significant and eventually so large that the radar loses track.
Mm radar tracks low-flying targets
Millimeter-Radar ortet niedrig fliegende Objekte
Microwaves ; 13 , 12 ; 12-14
1974
2 Seiten, 3 Bilder
Article (Journal)
English
RADAR , MILLIMETERWELLE , CASSEGRAIN-ANTENNE , BANDBREITE (FREQUENZ) , FEHLER , PRUEFUNG , FEHLERERKENNUNG , ECHO , ECHOLOTUNG , ORTUNG
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