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Topic: Active radar homing

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In the News (Fri 17 Feb 12)

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	[No title]
		Whitehead A 244; anti-submarine; active/passive homing to 7 km (3.8 nm) at 33 kts; warhead 34 kg.
		Honeywell Mk 46; anti-submarine; active/passive homing to 11 km (5.9 nm) at 40 kts; warhead 44 kg.
		Honeywell Mk 44 Mod 1; active homing to 5.5 km (3 nm) at 30 kts; warhead 34 kg.
	www.textfiles.com /fun/armstech.txt (16148 words)

	R-27 (AA-10) Medium-Range Air-to-Air Missile \| Air Power \| SinoDefence.com
		It is not clear whether the missiles received by the PLAAF are standard R-27R and T models, or their downgraded export variants are known as R-27R1 and R-27T1.
		In its final stage of flight, the missile switches to semi-active radar-homing mode, or active infrared-homing mode depending on the type of the seeker.
		It is also capable of going around a plume of passive jamming, of being moved out of the main lobe of the platform's radar, and approaching a low-flying target from above at a given angle.
	www.sinodefence.com /airforce/weapon/r27.asp (623 words)

	BAe Active Skyflash and AIM-120 AMRAAM
		Using its frequency agile radar and infra-red search and track sensor it may not be detected by a less sophisticated opponent, who would then be up against an effectively silent, invisible adversary firing missiles which announce their presence only in the terminal homing phase.
		The Active Skyflash seeker is a derivative of the Matra MICA active radar seeker.
		Certainly were the requirement for an active missile to develop, say as the result of regional acquisition of the Fulcrum or Flanker, the AMRAAM and Active Skyflash would have to come under consideration.
	ausairpower.net /skyflash-slammer.html (4691 words)

	Russian Air Force 3.8
		Radar's ARGS-35 is the homing head of the active anti-ship missile, Kh-35 ASM.
		The semi-active radar homing missile and infrared missile are R-27ER (Alamo-C) and R-27ET (Alamo-D), respectively.
		The guidance is semi-active in the initial stage and semi-active radar homing in the final stage.
	www.sci.fi /~fta/ruaf-3-8.htm (2792 words)

	The Ultimate Semi-active radar homing Dog Breeds Information Guide and Reference
		Semi-active radar homing, or SARH, is a common type of missile guidance system, perhaps the most common type for longer range air-to-air and ground-to-air missile systems.
		In addition, the resolution of a radar is strongly related to the physical size of the antenna, in the small nose cone of a missile there isn't enough room to provide the sort of accuracy needed for guidance.
		Contrast this with beam riding systems, in which the radar is pointed at the target and the missile keeps itself centered in the beam by listening to the signal at the rear of the missile body.
	www.dogluvers.com /dog_breeds/SARH (616 words)

	Air Force Technology - Su-27 Sukhoi Flanker - Front Line Fighter Aircraft
		The aircraft is equipped with a 30mm GSh-301 gun with 150 rounds of ammunition and a range of missiles, rockets and bombs mounted externally on ten hardpoints.
		The Su-27SK is equipped with a Phazotron N001 Zhuk coherent pulse Doppler radar with track-while-scan and look-down/shoot-down capability.
		The range of the radar against 3-square-metre targets is over 100km in the forward hemisphere and 40km in the rear hemisphere.
	www.airforce-technology.com /projects/su27 (895 words)

	Air Power Analysis: AIM-120 AMRAAM
		Although the AMRAAM's active radar-homing seeker does feature this capability, its ability to guide itself in this manner is limited by the distance between itself and the target.
		Simply put, the small radar located in the missile is not powerful enough to detect and track a target over the ranges at which missile launch typically occurs.
		Should the target attempt to protect itself with active jamming, the radar is capable of utilizing its medium-PRF mode to provide a "home-on-jam" function.
	www.jolly-rogers.com /airpower/aim-120/avionics.html (782 words)

	AirToAirCombat.Com: Boeing F/A-18 Armament (Site not responding. Last check: 2007-11-02)
		The Sparrow uses semi-active radar homing and is compatible with either constant-wave or pulse-Doppler radar illumination.
		Since this seeker uses its own active radar, it does not require that the launch aircraft illuminate or track the target during the terminal approach.
		It can also be configured to carry two AGM-84 Harpoon anti-shipping missiles, which uses active radar homing during the terminal stages of the flight to the target.
	www.airtoaircombat.com /background.asp?id=12&bg=76 (2154 words)

	Air-to-Air missile (AAM)
		For this purpose, the MRM uses a radar homing system with a greater detection range and better all-weather properties than the infrared guidance system.
		Particularly, in an active radar homing system, the transmitter radiating radar waves should be incorporated in a guidance control block.
		To overcome this drawback and allow the launching aircraft to retreat after launching the missile, the need for an active radar homing system using radar waves transmitted from the missile itself has been recognized and studied by many countries.
	www.fas.org /man/dod-101/sys/missile/row/aam.htm (587 words)

	Defence Talk Forum - Does Pakistan have Missile Subs? (Site not responding. Last check: 2007-11-02)
		The six YJ-1 missiles have active radar homing to 40 km (22nm) at 0.9 mach sea-skimming and has a 165kg war head.
		Inertial cruise, active radar homing to 40 km at 0.9 Mach, 165 kg warhead, sea skimmer
		The Agosta 90B submarines are equipped with the Thales DR-3000U radar warning receiver, operating in D to K bands.
	www.defencetalk.com /forums/printthread.php?t=3424 (1832 words)

	Soviet Air-to-Surface Missiles
		The passive radar homing missiles have the PGP passive radar seeker with a range of 380 to 350 kilometers.
		The passive radar seeker for the Kh-31P was designed by NPO Avtomatika and the ARGS-31 active radar seeker for the Kh-31A by NPO Leninets.
		Its ARGS-59 active radar seeker has a maximum detection range of 25 km against a 5,000 m2 RCS targets and 15 km against a 300 m2 RCS targets.
	personal.inet.fi /cool/foxfour/sovmis/sovmis-as.html (3699 words)

	Asian Aerospace 2004: Radar plays large role in RSAF buy (Site not responding. Last check: 2007-11-02)
		The Thales radar is close to being available for deployment, so depending on delivery schedules, Thales could deliver an AESA set on the second batch of aircraft to be delivered under the proposed contract schedule, and then the initial batch could be retrofitted to the AESA configuration.
		For its part, Thales officials stress that to step up from the passive to the active model as they propose for the Rafale is much less complicated than what Raytheon proposes for the F-15.
		The Singapore competition is really a look into the future in that the AESA radar is now the new cost of admission for a fighter trying to succeed in most export markets.
	www.ainonline.com /Publications/asian/asian_04/d3_radarp20.html (890 words)

	[No title]
		Because they home on radar energy reflected from their targets, semi-active radar homing (SARH) missiles like Sparrow or SkyFlash required that their targets should be constantly ‘illuminated’ by the launch aircraft’s continuous wave (or later pulse Doppler) radar.
		In an effort to overcome the inherent limitations of semi-active radar homing missiles, there have been a number of attempts to produce long range missiles which can operate with greater autonomy, and with less support from the launch aircraft.
		This meant that the missile used a small on-board radar to home onto the target in the final stages of flight.
	www.ukdf.org.uk /millibrief/M45.doc (1776 words)

	SA-6 Gainful / SA-N-3 GOBLET
		This radar can also be linked to the launch vehicles by either a radio data link or a 10m long cable for direct data input to the launcher's systems.
		The lower parabolic antenna is the G-band medium altitude target acquisition and early warning radar with a 55-75km range, with the lower feed for medium to high altitude coverage and the upper feed for low altitude coverage.
		If the radar vehicle is already active then the time taken for the sequence is reduced to between 15 to 30 seconds.
	www.fas.org /man/dod-101/sys/missile/row/sa-6.htm (1281 words)

	Equipment Matchups: Surface-to-Surface Weaponry (Site not responding. Last check: 2007-11-02)
		Mid-course guidance is inertial, with active radar during the terminal phase.
		The Harpoon's active radar guidance, warhead design, and low-level, sea-skimming cruise trajectory assure high survivability and effectiveness.
		Utilizing radar guided mid-course correction and semi-active terminal homing, it proved to be a highly accurate and reliable missile after years of improvements.
	www.emeraldesigns.com /matchup/ssm.htm (935 words)

	Chinese Military Aviation (Site not responding. Last check: 2007-11-02)
		The PL-11 medium-range semi-active radar homing AAM is believed to be Chinese copy of Italian Aspide AAM (several dozen were imported back in the late 80s).
		PL-11 is expected to be replaced by the new SD-10 active radar homing AAM.
		Similar to YJ-8K, YJ-82K uses a monopulse active radar seeker and possesses a sea-skimming capability.
	www.stormpages.com /jetfight/missile.htm (1480 words)

	Chinese Defence Today - 9M317/Shtil (SA-N-12) Ship-to-Air Missile
		The 9M317 missile is almost identical to the 9M38 in appearance, apart from a smaller wing span and chord.
		During the initial stage of the flight, the missile relies on the command from the target acquisition radar until it is close to the target.
		In a severe jamming environment the missile could also be guided by the electro-optical director, which would overwhelm the normal semi-active radar homing system.
	www.sinodefence.com /navy/navalmissile/9m317.asp (619 words)

	Naval Technology - Halifax Class - Frigates
		The Harpoon missile uses active radar homing to deliver a 227kg warhead to a range in excess of 130km.
		The Sea Sparrow vertical launch surface-to-air missile uses semi-active radar homing to deliver a 39kg warhead at speed Mach 1.6 to a range of 15km.
		Two Thales Nederland (formerly Signaal) SPG-503 (STIR 1.8) fire control radars are installed one on the roof of the bridge and one on the raised radar platform immediately forward of the helicopter hangar.
	www.naval-technology.com /projects/halifax/index.html (935 words)

	CHINASPECS
		active radar homing to 22 nm at 0.9 Mach
		active/passive homing to 8.1 nm at 40 kts ; passive wake homing to 10.3 nm at 45 kts
		2 - SS-N-2c Styx active radar or IR homing to 46 nm at 0.9 Mach
	members.tripod.com /tazolia/chinaspe.htm (1644 words)

	Military Aviation Terms and Definitions (Site not responding. Last check: 2007-11-02)
		Radar that uses a fixed array of transmitter/receiver elements to quickly scan the sky with electronic beams.
		Radar works by transmitting electromagnetic energy in the radio frequency (RF) portion of the spectrum and processing that portion of it which is reflected back to determine position and range.
		Radar Cross Section; a measure of an aircraft's visibility to radar.
	www.danshistory.com /glossary.shtml (8841 words)

	Key Publishing Ltd Aviation Forums - The WS-10 debate (Site not responding. Last check: 2007-11-02)
		The Kvant radar is a pure search radar only and lacks fire control and missile guidance functions seen in the radar of the 052C.
		China has been familiar with the active radar homing principle which was first developed for antiship use since the seventies.
		The radar may be a developed version of that first seen on the 970 weapons test ship, and could either be S-Band or Russian-style X-Band.
	forum.keypublishing.co.uk /showthread.php?t=45534 (5699 words)

	McDonnell F-4F/ICE Phantom II
		Under the ICE program, the simplified AN/APQ-120 radar of the F-4F was to be replaced with the highly-capable Hughes APG-65 digital multimode radar.
		This radar was originally intended for the F/A-18 Hornet, and had Doppler velocity tracking capability for moving target indication.
		The AIM-120 relies on semi-active radar homing for the initial flight to the target, but has autonomous midcourse inertial guidance and a radar transmitter in the nose to provide active terminal radar homing for the final approach to the target.
	home.att.net /~jbaugher1/f4_18.html (820 words)

	Naval Technology - Artigliere Class - Frigates
		This consists of one eight-cell launcher for the Aspide missile, which has a range of 15km and uses semi-active radar homing to deliver a 33kg fragmentation warhead.
		The ship's surface search radar is the Selex RAN 11 L/X and the navigation radar is the Selex SPN-703, both operating at I band.
		Two I and J band Selex SPG-70 fire control radars are long-range (40km) systems for use with the NA 21 fire control system for the missiles and main gun.
	www.naval-technology.com /projects/lupo/index.html (791 words)

	[No title] (Site not responding. Last check: 2007-11-02)
		Semi-active, continuous wave, homing radar, and hydraulically-operated control surfaces direct and stabilize the missile on a proportional navigational course to the target.
		An active RF fuze detonates the warhead when the missile is within lethal range of the target.
		Detonation is triggered by a fuze pulse from the active RF fuzing circuit in the guidance section at the nearest point of intercept or by an impact switch located in the control section.
	skunkworks.free.fr /aim7.DOC (2777 words)

	[No title]
		The problem with active radar homing missiles is that they generally don't work too well close to shore.
		Also active homers are limited by small radar sizes and have limited ranges requiring SARH or intertial or midcourse update to get the missile close enough to the target.
		An active homing missile such as Harpoon has a range of around 150 km and would be fired at a point where the radar seeker will switch on and look for targets, the so called 'over the horizon' capability.
	www.ludd.luth.se /~antenna/ml/99/9999.txt (5366 words)

	Patrick Robinson (Site not responding. Last check: 2007-11-02)
		SSM: GDC Tomahawk; anti-ship active radar; Homing to 250 n miles at 0.7 Mach; Warhead 454 kg; McDonnell Douglas Harpoon; active radar homing to 70 n miles at 0.9 Mach; warhead 227 kg
		24, model 2; wire-guided; active/passive homing to 13 kilometers at 35 knots active; 20 kilometers at 24 knots passive.
		Surface-to-Air Missiles: 6 to 8 SA-N-5/8, homing from 600 to 6,000 meters.
	www.patrickrobinson.com /subs.html (762 words)

	Missile Guidance
		Infra-Red homing is used mainly by missiles designed to destroy aircraft, the target aircraft’s exhaust shining like a beacon to the infra-red sensor in the nose of the missile.
		The integral radar searches for the size of target it was programmed to reach.
		This system uses a radar to illuminate the target for the sensor in the nose of the missile.
	www.rafmuseum.org.uk /cosford/collections/missiles/guidance_2.cfm (263 words)

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