- AN/SPQ-11
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AN/SPQ-11 
Close-up of the front of Cobra Judy radar, 1983.Country of origin United States Number built 1 Type Passive electronically scanned array radar Frequency 2900-3100 MHz (E\F band) 
Aft view of the USNS Observation Island showing the location of the Cobra Judy array.
The AN/SPQ-11 Cobra Judy is a PESA radar found on the Observation Island-class missile range instrumentation ship.
It is used for space tracking, ballistic missiles tracking and other instrumentation.
Cobra Judy is the sea component of the COBRA program for monitoring missile launches and outer space.
See also
External links
Categories:- Radio frequency antenna types
- Sea radars
- Military electronics of the United States
- Joint Electronics Type Designation System
- Cobra radars
- United States Navy stubs
- Electronics stubs
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