. "1103222295"^^ . . . . . . . . . . "AN/APQ-181 adalah sebuah sistem radar segala cuaca, probabilitas rendah intercept (LPI) yang dirancang oleh Hughes Aircraft (sekarang Raytheon) untuk pesawat bomber Angkatan Udara AS B-2A Spirit. Sistem ini dikembangkan di pertengahan 1980-an dan mulai beroperasi pada tahun 1993. APQ-181 menyediakan sejumlah mode presisi penargetan, dan juga mendukung medan berikut dan menghindari medan. Radar beroperasi di band Ku (subset dari J band). Desain asli menggunakan pemancar TWT berbasis dengan 2-dimensi array yang antena pasif elektronik dipindai (PESA)."@in . . . . "AN/APQ-181\uC740 \uBBF8\uAD6D \uC2A4\uD154\uC2A4 \uD3ED\uACA9\uAE30 B-2 \uC2A4\uD53C\uB9BF\uC5D0 \uD0D1\uC7AC\uB418\uB294 AESA \uB808\uC774\uB354\uB2E4."@ko . . . "AN/APQ-181\uC740 \uBBF8\uAD6D \uC2A4\uD154\uC2A4 \uD3ED\uACA9\uAE30 B-2 \uC2A4\uD53C\uB9BF\uC5D0 \uD0D1\uC7AC\uB418\uB294 AESA \uB808\uC774\uB354\uB2E4."@ko . . "The AN/APQ-181 is an all-weather, low probability of intercept (LPI) phased array 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."@en . . . . "AN/APQ-181 adalah sebuah sistem radar segala cuaca, probabilitas rendah intercept (LPI) yang dirancang oleh Hughes Aircraft (sekarang Raytheon) untuk pesawat bomber Angkatan Udara AS B-2A Spirit. Sistem ini dikembangkan di pertengahan 1980-an dan mulai beroperasi pada tahun 1993. APQ-181 menyediakan sejumlah mode presisi penargetan, dan juga mendukung medan berikut dan menghindari medan. Radar beroperasi di band Ku (subset dari J band). Desain asli menggunakan pemancar TWT berbasis dengan 2-dimensi array yang antena pasif elektronik dipindai (PESA)."@in . . . . . "AN/APQ-181"@en . . . "2650"^^ . . . . . . "AN/APQ-181"@ko . . "Le radar AN/APQ-181 est un radar \u00E0 synth\u00E8se d'ouverture qualifi\u00E9 \u00E0 (en) \u00E9quipant le bombardier strat\u00E9gique furtif Northrop B-2 Spirit de l'United States Air Force construit \u00E0 21 exemplaires."@fr . . . . . . . . . . . . . . . "AN/APQ-181"@fr . . . . "2993098"^^ . . . . . . . . . . . "Le radar AN/APQ-181 est un radar \u00E0 synth\u00E8se d'ouverture qualifi\u00E9 \u00E0 (en) \u00E9quipant le bombardier strat\u00E9gique furtif Northrop B-2 Spirit de l'United States Air Force construit \u00E0 21 exemplaires."@fr . "APQ-181 radar"@in . . . . "The AN/APQ-181 is an all-weather, low probability of intercept (LPI) phased array 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."@en .