air surveillance radar


Also found in: Acronyms.

air surveillance radar

[¦er sər¦vā·ləns ¦ra‚där]
(engineering)
Radar of moderate range providing position of aircraft by azimuth and range data without elevation data; used for air-traffic control.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

air surveillance radar (ASR)

A radar deployed around the aerodromes that can detect aircraft within 360° and at a range of 60 NM. The radar does not have the resolving power of precision approach radar (PAR) but has a higher range and 360° coverage. The radar can be used for a ground-controlled approach to a limited extent. Since no control of altitude is available and the accuracy of lateral control is less than that of PAR, the airplane must break through any overcast at a higher altitude than in a PAR. The ASR can be used to bring aircraft within one mile of touchdown.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
References in periodicals archive ?
The early air surveillance radars were equipped with high power self-oscillating output stages.
Designed to home in on the transmissions of hostile ground-based air surveillance radars, the Texas Instruments AGM 45A/B family of air-to-surface ARMs received its combat debut courtesy of United States' Navy (USN) McDonnell Douglas A-4A/B/C Skyhawk Multi-Role Combat Aircraft (MRCA) during the United States' involvement in the Vietnam War between 1965 and 1975.
Raytheon's AN/SPS-52C 3D long-range, E-band surveillance radar furnishes vessels belonging to the Spanish and Italian navies and the company's AN/SPS-49(V)4 C/D-band air surveillance radar system has been purchased by the US, Canadian and Australian navies for use on aircraft carriers and frigates.
Son of the long range AN/FPS-117 air surveillance radar introduced in the late 1970s for the US Air Force's Alaskan Air Command, the FPS-117 is a much modernised and mobile version developed by Lockheed Martin to meet requirements from Brazil and Australia.
ENPNewswire-August 20, 2019--Enterprise Air Surveillance Radar successfully tracks first targets at Wallops Island Test Facility; System-level testing moves program one step closer to low rate initial production
McCool Jr., is set to be upgraded with Raytheon's Enterprise Air Surveillance Radar, a new 3D enterprise radar system, Metcalf said.
Air surveillance radars continue to be flown primarily on modified airliners with no substantial improvements in altitude, speed, stealth, countermeasures, or any other method of self-defense.