AN/SPQ-11
Close-up of the front of Cobra Judy radar, 1983. | |
| Country of origin | United States |
|---|---|
| Introduced | 1983 |
| No. built | 1 |
| Type | Passive electronically scanned array radar |
| Frequency | 2900–3100 MHz (E\F band) |
The AN/SPQ-11 Cobra Judy was a PESA radar found on the USNS Observation Island (T-AGM-23) missile range instrumentation ship.
It was used for space tracking, ballistic missiles tracking and other instrumentation. Cobra Judy was the Airforce code name for the afloat phased-array radar that was designed with a primary mission of monitoring Soviet missile tests and which operated in conjunction with land based phased-array radar Cobra Dane and Cobra Ball aircraft. Cobra Judy was replaced by the Cobra Judy Replacement (CJR) in April 2014.
In accordance with the Joint Electronics Type Designation System (JETDS), the "AN/SPQ-11" designation represents the 11th design of an Army-Navy electronic device for surface ship special radar system. The JETDS system also now is used to name all Department of Defense electronic systems.