Airport Surveillance Radar - Model 9
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ASR-9 Overview Airport Surveillance Radar - Model 9 is a short-range (60 nmi) primary surveillance radar system for the airport terminal area. The ASR-9 has a separate weather channel with associated processing capable of providing six-level weather contours.The two-level weather contour processing associated with the moving target detector is only be used for backup. The six-level weather channel is primarily used to supplement Next Generation Weather Radar (NEXRAD) coverage. It is normally used in conjunction with Mode Select (Mode S) but it can accommodate an ATCBI-4/5. ASR-9s also feed the En Route automation systems to fill gaps in coverage from long-range radars. This dual-beam system uses two PRFs but transmits only in low beam. The system is in use at some 135 locations in the US as well as in 10 other countries.
Vendor NORTHROP GRUMMAN, Electronic Systems, Baltimore, MD, USA
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