Multi-role Electronically Scanned Array
{{Short description|Type of aircraft radar}}
{{Use American English|date=August 2020}}
{{Infobox radar
|name = MESA
|image = File:A30-002 (cropped).jpg
|caption = An E-7 Wedgetail of the RAAF, with the MESA radar on the large dorsal fin on top of the fuselage
|country = United States
|designer =
|manufacturer= Northrop Grumman
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|type = Surveillance radar
|frequency = L band
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The Multi-role Electronically Scanned Array (MESA) is an active electronically scanned array surveillance radar system for the Boeing E-7 Wedgetail airborne early warning and control aircraft. The radar is produced by Northrop Grumman.
Design and development
In the 1990s, Australia recognized a need for an airborne early warning and control (AEW&C) aircraft. In 1996, Australia issued a request for proposal (RFP) for the aircraft for the RAAF under Project Wedgetail, referring to the Wedge-tailed eagle.[http://www.defence.gov.au/dmo/dceod/air5077/air5077.cfm "AIR 5077 - Project Wedgetail"] {{webarchive |url=https://web.archive.org/web/20120227193949/http://www.defence.gov.au/dmo/dceod/air5077/air5077.cfm |date=27 February 2012}}. Defence Materiel Organisation In 1999, Australia awarded Boeing Integrated Defense Systems a contract to supply four AEW&C aircraft with options for three additional aircraft.{{citation needed|date=January 2013}}
The L band (1 to 2 GHz) electronically scanned AEW and surveillance radar is located on a dorsal fin on top of the fuselage, dubbed the "top hat", and is designed for minimal aerodynamic effect. The radar is capable of simultaneous air and sea search, fighter control and area search, with a maximum range of over 600 km (look-up mode). When operating in look-down mode against fighter-sized target, the maximum range is in excess of 370 km. When used against maritime targets, the maximum range is over 240 km for frigate-sized targets. MESA is capable of simultaneously tracking 180 targets and conducting 24 intercepts. In addition, the radar antenna array is also doubled as an ELINT array, with a maximum range of over 850 km at {{Convert|9000|m|ft|order=flip}} altitude.{{cite web |url=http://articles.janes.com/articles/Janes-Radar-and-Electronic-Warfare-Systems/Multirole-Electronically-Scanned-Array-MESA-radar-United-States.html |title=Defense & Security Intelligence & Analysis: IHS Jane's - IHS |work=janes.com |accessdate=7 March 2016 |archive-url=https://web.archive.org/web/20120429073901/http://articles.janes.com/articles/Janes-Radar-and-Electronic-Warfare-Systems/Multirole-Electronically-Scanned-Array-MESA-radar-United-States.html |archive-date=29 April 2012 |url-status=live}}
The 10.8 m long by 3.4 m high antenna assembly incorporates 7.3 m long by 2.7 m high Side-Emitting Electronic Manifold array, with the top hat supporting array providing 120° coverage on port and starboard side, while the top hat array itself provides 60° fore and aft, thus providing a complete 360° coverage. The radar's beam can be set for a 2° to 8° width, while scan duration can be set from 3 s to 40 s. Radar signal processing equipment and central computer are installed directly below the antenna array.{{cite web |url=http://articles.janes.com/articles/Janes-Electronic-Mission-Aircraft/Multirole-Electronically-Scanned-Array-MESA-radar-United-States.html |title=Defense & Security Intelligence & Analysis: IHS Jane's - IHS |work=janes.com |accessdate=7 March 2016 |archive-url=https://web.archive.org/web/20120429094617/http://articles.janes.com/articles/Janes-Electronic-Mission-Aircraft/Multirole-Electronically-Scanned-Array-MESA-radar-United-States.html |archive-date=29 April 2012 |url-status=live}}
The cabin features eight operator consoles with sufficient space for four more; the Australian fleet will operate ten consoles with space for two more (four on starboard side and six on the port side).{{cite web |url=http://articles.janes.com/articles/Janes-All-the-Worlds-Aircraft/Boeing-737-AEW-C-United-States.html |title=Defense & Security Intelligence & Analysis: IHS Jane's - IHS |work=janes.com |accessdate=7 March 2016 |archive-url=https://archive.today/20130216082341/http://articles.janes.com/articles/Janes-All-the-Worlds-Aircraft/Boeing-737-AEW-C-United-States.html |archive-date=16 February 2013 |url-status=live}}
Applications
See also
References
{{Reflist}}
External links
- [https://www.northropgrumman.com/what-we-do/air/multi-role-electronically-scanned-array-mesa-surveillance-radar Northrop Grumman Multi-role Electronically Scanned Array (MESA) Surveillance Radar page]
{{Northrop Grumman}}
Category:Military radars of the United States