AN/SPQ-11 “Cobra Judy“
Air Defense Radar
Official Photo
Basic Information
Name
AN/SPQ-11 “Cobra Judy“
Designation
—
Alternate Designation
—
Equipment Type
Air Defense Radar
Manufacturer
Raytheon E-Systems
Date of Introduction
—
Description
The AN/SPQ-11 “Cobra Judy” is a shipborne long-range surveillance radar, operating in the S-band (2,900–3,100 MHz), designed to detect and track intercontinental ballistic missiles. Manufactured by Raytheon E-Systems, this United States-origin system was designed in 1976 and became operational in 1981, mounted aboard the USNS Observation Island. Its octagonal passive phased array antenna, approximately 7 meters in diameter, comprises 12,288 elements and is fed by 16 traveling wave tubes. The entire radar system, weighing about 250 tonnes and standing over 40 feet high, is mounted on an azimuth pedestal and has an instrumented range exceeding 3,700 km.
Ground Specifications
Range
3704.0 km
Technical Characteristics
frequency
2 900 … 3 100 MHz (S band)
pulse repetition frequency (PRF)
CW … < 400 kHz
pulsewidth (τ)
CW … > 50 ns
instrumented range
> 2 000 NMNM(≙ > 3 700 km)
Details
Country of Origin
United States
Category
Air Defense Radars
Land > Radars > Air Defense Radars
Sources
radartutorial.eu: https://www.radartutorial.eu/19.kartei/02.surv/karte084.en.html
Classification
Domain
Ground
Equipment Status
Active
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