417:. Increased jamming resistance, improved weather penetration, better guidance in turn flight, and better power management function in semi-covert mission. The radar can operate in terrain-clearance, terrain-avoidance, air-to-air ranging and cross-scan modes, the latter combining ground-mapping or terrain-avoidance with terrain-following. A terrain storage facility permits the radar to have a reduced duty cycle, thereby reducing the probability of detection by enemy ESM equipment. There's also the incorporation of built-in test (BITE) provides a high degree of fault isolation and detection.
215:. AN/APQ-122 has a slotted planar array antenna with a separate X-band receiver used to generate MRI video, with a search cone of 7.5 degrees wide, spanning from +8 degrees above to -17 degrees below to the boresight of the aircraft. For AN/APQ-122(V)B, the stabilization reference could either be manually or automatically switched to MD-1 gyro if the LN-15J inertial navigational system become unreliable or inoperable, thus terrain following operation can still continue, where in earlier system such as AN/APQ-115, if the Doppler fails, the terrain following operation would be discontinued.
168:. AN/APQ-115 has a single contoured, spoiled parabola antenna, with a search cone of 5 degrees wide, spanning from +7 degrees above to -18 degrees below to the boresight of the aircraft. AN/APQ-115 suffered from inaccurate references (poor stabilization and Doppler inputs), which directly lead to the development of more advanced system such as AN/APQ-122.
42:
This is the first terrain-following radar for use on crewed aircraft, designed by Bert
Bechtel, a former Navy engineer, who had designed a radar scan template control technique that permitted safe aircraft descent in adverse weather. The concept was the basis of winning a $ 750,000 US Army contract
183:
aircraft. AN/APQ-116 was basically the integration of previously independent AN/APQ-115 TFR into the ILAAS digital navigation system. The radar also fed a digital weapons computer which made possible accurate delivery of bombs from a greater stand-off distance, greatly improving survivability
43:
to develop a radar system to automatically guide a drone aircraft. The US Army did not pursue the project to production, but the US Air Force became interested and believed that
Bechtel's innovation would protect the low-flying planes.
78:
Developed by TI as a multi-modes radar, in addition to terrain avoidance and terrain-following modes, and AN/APQ-99 can also be used for ground mapping. Smaller in size then the
Westinghouse AN/APQ-72 and fitted in the nose of for
26:(TFRs) produced in the world, and with over 500 units built, it was a member of a family of TFRs consisted of nearly two dozen models, all of which are based on the same general design principle. First developed by
440:, developed by Texas Instruments in the mid- eighties with the objective of replacing the four different TFR models used across the USAF F-111 fleet with a single type. While the old TFR had an
745:
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helicopter and PAVE LOW III requirement. Designed to perform terrain following mode/function in high clutter area such as in cities.
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126:
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Development of AN/APQ-99 for RF-4C, incorporating experience gained from AN/APQ-116 and other radars in the family.
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248:. This is primarily AN/APQ-116/122 incorporating improved maritime capability. Specifications:
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by Tandy Penn, College of
Engineering atTexas Tech University, Oct 15, 2005"
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The
Praetorian STARShip : the untold story of the Combat Talon
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for pilots to familiarize TFR operation on other combat aircraft.
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Improvement of AN/APQ-126 with 15 line replaceable units for the
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around 20 hours, MBTF for the AN/APQ-171 is better than 50 hrs.
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specially designed for night interdiction missions in
Vietnam.
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591:
34:
when the latter purchased the radar business of the former.
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compared with faster platforms such as the F-4 Phantom II.
87:. AN/APQ-99 is also supplied to Germany, Iran and Japan.
452:
Improved AN/APQ-162 TFR (Terrain-Following Radar) for
355:TFR (Terrain-Following Radar) for initial batch of
258:Maritime surface search (vs. small contacts): 51NM
716:List of military electronics of the United States
125:. It replaced the side-looking mapping radar by
252:Maritime surface search: (high altitude): 150NM
255:Maritime surface search: (low altitude): 106NM
95:Terrain-following radar by Texas Instruments.
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51:Terrain-following/ground-mapping radar by
746:Military electronics of the United States
261:Land surface search (med altitude): 34NM
66:TFR (Terrain-Following Radar) tested on
528:
16:Radar model series by Texas Instruments
629:. DIANE Publishing. 2001. p. 40.
741:Radars of the United States Air Force
7:
736:Military radars of the United States
574:A History of Terrain-Following Radar
599:"Terrain-following radar developed"
175:I-band AN/APQ-116 is a TFR used in
14:
127:Goodyear Tire and Rubber Company
1:
22:is one of the most numerous
762:
290:to replace AN/APQ-110 for
30:, and later produced by
24:terrain-following radars
509:terrain-following radar
430:terrain-following radar
371:terrain-following radar
337:terrain-following radar
284:terrain-following radar
267:Terrain following: 19NM
231:terrain-following radar
146:terrain-following radar
111:terrain-following radar
661:AN/APQ-126 performance
158:General Dynamics F-111
119:General Dynamics F-111
672:AN/APQ-147 on MH-60K
409:Multi-mode radar by
309:multi-mode radar by
223:60 kW improved
195:multi-mode radar by
415:HH-60D & MH-60K
246:CH-53 Sea Stallion
636:978-1-4289-9043-2
513:Texas Instruments
434:Texas Instruments
411:Texas Instruments
375:Texas Instruments
341:Texas Instruments
311:Texas Instruments
288:Texas Instruments
235:Texas Instruments
197:Texas Instruments
173:Texas Instruments
150:Texas Instruments
115:Texas Instruments
53:Texas Instruments
28:Texas Instruments
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686:. Archived from
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650:AN/APQ-126 photo
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601:. Archived from
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264:Air search: 20NM
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731:Aircraft radars
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711:List of radars
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391:MH-53 Pave Low
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292:F-111A/FB-111A
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201:C-130 Hercules
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181:C-130 Hercules
177:A-7 Corsair II
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690:on 2008-09-07
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605:on 2010-03-31
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205:Boeing RC-135
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692:. Retrieved
688:the original
684:"AN/APQ-186"
678:
667:
656:
645:
625:
619:
607:. Retrieved
603:the original
579:. Retrieved
573:
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500:
483:
481:
474:helicopters
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19:
18:
209:Boeing T-43
68:T-2 Buckeye
57:OV-1 Mohawk
725:Categories
694:2013-03-20
581:2011-10-09
524:References
497:AN/APN-237
484:AN/APQ-174
478:AN/APQ-186
461:AN/APQ-174
448:AN/APQ-172
427:AN/APG-146
421:AN/APQ-171
405:AN/APQ-168
397:AN/APQ-162
385:AN/APQ-158
368:AN/APQ-141
362:AN/APQ-154
351:AN/APQ-147
327:AN/APQ-134
321:AN/APQ-146
298:AN/APQ-139
272:AN/APQ-134
225:AN/APQ-116
219:AN/APQ-126
213:Boeing E-4
188:AN/APQ-122
143:AN/APQ-110
137:AN/APQ-115
99:AN/APQ-110
91:AN/APQ-101
47:AN/APN-165
38:AN/APN-149
20:AN/APQ-116
518:AN/AAQ-13
482:Improved
425:Improved
366:Improved
325:Improved
141:Improved
74:AN/APQ-99
62:AN/APQ-89
705:See also
609:20 March
515:part of
488:Raytheon
466:For the
438:F-111C/F
345:F-111C/F
152:for the
32:Raytheon
85:RF-4B/C
633:
472:MH-47E
468:MH-60K
357:MH-60K
242:AC-130
239:A-7D/E
228:J band
193:X band
166:C-130E
164:, and
121:A and
492:CV-22
454:RF-4C
379:HH-53
315:B-57G
162:RF-4C
131:RF-4C
123:RF-4C
631:ISBN
611:2013
506:band
490:for
470:and
442:MTBF
436:for
413:for
377:for
343:for
334:band
313:for
307:band
281:band
244:and
237:for
211:and
199:for
179:and
171:The
154:A-7A
117:for
108:band
81:A-7A
55:for
511:by
486:by
432:by
373:by
339:by
286:by
233:by
160:,
156:,
148:by
129:on
113:by
727::
590:^
531:^
456:.
381:.
347:.
294:.
207:,
203:,
133:.
83:,
697:.
639:.
613:.
584:.
572:"
504:u
502:K
332:u
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303:K
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104:K
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