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.
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.

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