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- APQ-181 abstract "The AN/APQ-181 is an all-weather, low probability of intercept (LPI) radar system designed by Hughes Aircraft (now Raytheon) for the U.S. Air Force B-2A Spirit bomber aircraft. The system was developed in the mid-1980s and entered service in 1993. The APQ-181 provides a number of precision targeting modes, and also supports terrain-following radar and terrain avoidance. The radar operates in the Ku band (a subset of the J band). The original design uses a TWT-based transmitter with a 2-dimensional passive electronically scanned array (PESA) antenna.In 1991, the B-2 Industrial Team (including Hughes as a major subcontractor) was awarded the Collier Trophy in recognition of the "design, development, production, and flight testing of the B-2 aircraft, which has contributed significantly to America's enduring leadership in aerospace and the country's future national security."In 2002, Raytheon was awarded a contract to develop a new, active electronically scanned array (AESA) version of the APQ-181. This upgrade will improve system reliability, and will also eliminate potential conflicts in frequency usage between the B-2 and commercial satellite systems that also use the J band. In 2008 the Federal Communications Commission accidentally sold the APQ-181 frequency to a commercial user resulting in the need for installing new radar arrays at a cost of over $1 billion. All B-2 aircraft are expected to have the upgraded radar by 2010.[1]".
- APQ-181 thumbnail B-2_radar.jpg?width=300.
- APQ-181 wikiPageExternalLink b2.
- APQ-181 wikiPageExternalLink 0,15240,187202,00.html.
- APQ-181 wikiPageExternalLink apq181.
- APQ-181 wikiPageExternalLink plane-b2-03a.html.
- APQ-181 wikiPageID "2993098".
- APQ-181 wikiPageLength "2338".
- APQ-181 wikiPageOutDegree "24".
- APQ-181 wikiPageRevisionID "645957955".
- APQ-181 wikiPageWikiLink Active_electronically_scanned_array.
- APQ-181 wikiPageWikiLink Antenna_(radio).
- APQ-181 wikiPageWikiLink Category:Aircraft_radars.
- APQ-181 wikiPageWikiLink Category:Equipment_of_the_United_States_Air_Force.
- APQ-181 wikiPageWikiLink Category:Military_radars_of_the_United_States.
- APQ-181 wikiPageWikiLink Category:Raytheon_products.
- APQ-181 wikiPageWikiLink Collier_Trophy.
- APQ-181 wikiPageWikiLink Federal_Communications_Commission.
- APQ-181 wikiPageWikiLink Hughes_Aircraft.
- APQ-181 wikiPageWikiLink Hughes_Aircraft_Company.
- APQ-181 wikiPageWikiLink J_band.
- APQ-181 wikiPageWikiLink Joint_Electronics_Type_Designation_System.
- APQ-181 wikiPageWikiLink Ku_band.
- APQ-181 wikiPageWikiLink List_of_radars.
- APQ-181 wikiPageWikiLink Low_probability_of_intercept.
- APQ-181 wikiPageWikiLink Low_probability_of_intercept_radar.
- APQ-181 wikiPageWikiLink Northrop_Grumman_B-2_Spirit.
- APQ-181 wikiPageWikiLink Passive_electronically_scanned_array.
- APQ-181 wikiPageWikiLink Radar.
- APQ-181 wikiPageWikiLink Raytheon.
- APQ-181 wikiPageWikiLink Terrain-following_radar.
- APQ-181 wikiPageWikiLink Terrain_avoidance.
- APQ-181 wikiPageWikiLink Transmitter.
- APQ-181 wikiPageWikiLink Traveling-wave_tube.
- APQ-181 wikiPageWikiLink U.S._Air_Force.
- APQ-181 wikiPageWikiLink United_States_Air_Force.
- APQ-181 wikiPageWikiLink File:B-2_radar.jpg.
- APQ-181 wikiPageWikiLinkText "AN/APQ-181".
- APQ-181 hasPhotoCollection APQ-181.
- APQ-181 wikiPageUsesTemplate Template:Portal.
- APQ-181 subject Category:Aircraft_radars.
- APQ-181 subject Category:Equipment_of_the_United_States_Air_Force.
- APQ-181 subject Category:Military_radars_of_the_United_States.
- APQ-181 subject Category:Raytheon_products.
- APQ-181 hypernym Probability.
- APQ-181 comment "The AN/APQ-181 is an all-weather, low probability of intercept (LPI) radar system designed by Hughes Aircraft (now Raytheon) for the U.S. Air Force B-2A Spirit bomber aircraft. The system was developed in the mid-1980s and entered service in 1993. The APQ-181 provides a number of precision targeting modes, and also supports terrain-following radar and terrain avoidance. The radar operates in the Ku band (a subset of the J band).".
- APQ-181 label "AN/APQ-181".
- APQ-181 sameAs APQ-181_radar.
- APQ-181 sameAs m.08j8tw.
- APQ-181 sameAs Q4653390.
- APQ-181 sameAs Q4653390.
- APQ-181 wasDerivedFrom APQ-181?oldid=645957955.
- APQ-181 depiction B-2_radar.jpg.
- APQ-181 isPrimaryTopicOf APQ-181.