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((Short description|Type of aircraft radar system))
((For|the similar [[ASARS-1]] system|SR-71 Blackbird))
((Refimprove|article|date=November 2012))
The Advanced [[Synthetic Aperture Radar]] System-2 ('''ASARS-2''') is the radar system mounted on some variants of the [[Lockheed U-2]] reconnaissance aircraft.

The ASARS-2 radar was originally developed in the early 1980s by [[Hughes Aircraft]], which was acquired by [[Raytheon]] in the late 1990s. It is capable of detecting and accurately locating both stationary and moving ground targets; target information is transmitted via a [[wideband]] [[data link]] to a ground station. The radar is capable of producing extremely [[image resolution|high resolution]] images at long range.

ASARS-2 was used extensively during [[Operation Desert Storm]] for target location and battle damage assessment. It has also been used to survey damage after various domestic disasters, including [[flood]]s along the [[Mississippi River]] and the [[1994 Northridge earthquake]].

In the late 1990s, the ASARS Improvement Program (AIP) incorporated several performance and supportability enhancements into the system. Making extensive use of [[commercial off-the-shelf]] technology, the AIP redesign increased on-board processing capability and upgraded the data link. The first of these '''ASARS-2A''' radars was delivered in 2001.<ref>((Cite web |url=http://www.aiaa.org/aerospace/Article.cfm?issuetocid=251&ArchiveIssueID=30 |title=AIAA - Aerospace America Online - EYE ON ELECTRONICS - SARs will remain budget stars |access-date=2006-03-21 |archive-url=https://web.archive.org/web/20060402025435/http://www.aiaa.org/aerospace/Article.cfm?issuetocid=251&ArchiveIssueID=30 |archive-date=2006-04-02 |url-status=dead ))</ref>

Some features and technologies from the ASARS-2A system have been incorporated into the [[Raytheon Sentinel]] developed as the [[Royal Air Force|RAF]]'s Airborne STand-Off Radar (ASTOR) aircraft.

== References ==
((Reflist))
* [https://web.archive.org/web/20071027015119/http://www.raytheon.com/products/asars_2/ ASARS-2 product information on the Raytheon website]
* [http://www.fas.org/irp/program/collect/asars-2.htm ASARS-2 on the Federation of American Scientists website]
((Raytheon))

[[Category:Aircraft radars]]
[[Category:Hughes Aircraft Company]]
[[Category:Raytheon Company products]]
[[Category:Synthetic aperture radar]]

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