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ASR 12

Air Traffic Control Radar
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ASR 12
Official Photo
Figure 1: ATC-Radar ASR 12 (© Northrop Grumman)© Northrop Grumman
Basic Information
Name
ASR 12
Designation
—
Alternate Designation
—
Equipment Type
Air Traffic Control Radar
Manufacturer
Northrop Grumman
Date of Introduction
—
Description

The Northrop Grumman ASR 12 is a modular, fully solid-state airport surveillance radar system operating in the S-band (IEEE designation) or E-band (NATO designation) at frequencies between 2.7 and 2.9 GHz. As a further development of the ASR 9, it utilizes the same 36-foot wide by 17-foot tall curved metal latticework reflector. The system processes weather conditions, measured in six intensity levels conforming to ICAO standards, via a dedicated weather channel processor separate from the aircraft channel. Its operational transitions are adjustable, allowing optimization for site-specific clutter conditions, and it features an instrumented range of 60, 80, or 100 nautical miles with a range resolution of 700 feet.

Ground Specifications
Range 111.1 km
Technical Characteristics
frequency 2.7 … 2.9 GHz
pulse repetition time (PRT) processor controlled
pulsewidth (τ) 1 µs and 55 µs
peak power 22 kW
instrumented range 60 / 80 / 100 NM
range resolution 700 ft
beamwidth 1.4 degrees
antenna rotation 10 / 12 / 15 rpm.
MTBCF > 37 500 h
MTTR < 0.25 h
Details
Country of Origin United States
Category ATC Radars
Land > Radars > ATC Radars
Sources

radartutorial.eu: https://www.radartutorial.eu/19.kartei/03.atc/karte005.en.html

Classification
Domain
Ground
Equipment Status
Active
Documents & Files (2)
rx04.en.html
8.07 KB
Figure 2: Radarantenna with high- and low- beam pattern
radartutorial.eu
co07.en.html
16.29 KB
Figure 3: Example of radar timeline with different pulse-durations In the lower elevation the radar radiates a number of „Short-Range-Pulses” in series. This is required for pulse-pair processing practicable in close-up range only.
radartutorial.eu
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