
	Where results make sense

Topic: Passive radar

Related Topics

Radar

Types and uses of radar

History of radar

3D radar

Millimetre cloud radar

Doppler radar

Synthetic aperture radar

Radar gun

Secondary surveillance radar

Active Electronically Scanned Array

Sonar

NEXRAD

Transponder

Phased array

Minehunter

In the News (Wed 25 Nov 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Spartanburg SC \| GoUpstate.com \| Spartanburg Herald-Journal
		Passive radar systems (also referred to a passive coherent location and passive covert radar) encompass a class of radar systems that detect and track objects by processing reflections from non-cooperative sources of illumination in the environment, such as commercial broadcast and communications signals.
		Passive radar accuracy is a strong function of the deployment geometry and the number of receivers and transmitters being used.
		Most passive radars are two-dimensional, but height measurements are possible when the deployment is such there is significant variation in the altitudes of the transmitters, receiver and target, reducing the effects of geometrical dilution of precision (GDOP).
	www.goupstate.com /apps/pbcs.dll/section?category=NEWS&template=wiki&text=passive_radar (2711 words)

	Radar Detector Legal - Radar Detector Law
		Radar Detectors - The Operation of a radar detector and or laser detector is legal in every state with the exception of Virginia and Washington DC.
		It is illegal to use a radar detector and or laser detector while on a military base or in a commercial vehicle weighing over 10,000 pounds.
		A: Active jammers send a signal to jam radar and or laser guns while passive jammers claim they simply scramble the incoming signal that is attempting to obtain your speed before it is sent back to the radar and or laser gun attempting to read your speed.
	www.007radardetectors.com /legal.htm (294 words)

	Bistatic radar - Wikipedia, the free encyclopedia
		Bistatic radar is the name given to a radar system which comprises a transmitter and receiver which are separated by a distance that is comparable to the expected target distance.
		Conversely, a radar in which the transmitter and receiver are collocated is called a monostatic radar.
		For example, some very long range HF radar systems may have a transmitter and receiver which are separated by a few tens of kilometres for reasons for electrical isolation, but as the expected target range is of the order 1000-3500km, they are not considered to be truly bistatic and are referred to as pseudo-monostatic.
	en.wikipedia.org /wiki/Multistatic_radar (507 words)

	Possible Application of Passive Radar for Tornadoe Detection (Site not responding. Last check: )
		Doppler Radar has the source and receiver located on the same platform (monostatic condition) or on two different platforms (bistatic condition) and measures the speed of the wind rotating in the funnel of a tornado, as well as the speed of its propagation.
		The same passive radar array could likely be used to map the approach and passage of a tornado, although signal intensity may be more important than the signal time of reception as data from which a tornado detection algorithm would be created.
		However, passive radar may not be able to tell the difference between funnel clouds in the air from those that have touched the ground, a constraint shared by Doppler radar.
	www.dnr.state.oh.us /OhioSeis/research/vincent1.htm (1918 words)

	Passive radar - Wikipedia, the free encyclopedia
		Passive radar systems (also referred to a passive coherent location and passive covert radar) encompass a class of radar systems that detect and track objects by processing reflections from non-cooperative sources of illumination in the environment, such as commercial broadcast and communications signals.
		Passive radar accuracy is a strong function of the deployment geometry and the number of receivers and transmitters being used.
		Most passive radars are two-dimensional, but height measurements are possible when the deployment is such there is significant variation in the altitudes of the transmitters, receiver and target, reducing the effects of geometrical dilution of precision (GDOP).
	en.wikipedia.org /wiki/Passive_radar (2692 words)

	Radar system - Patent 6952179
		A dual mode seeker according to claim 1, wherein said active radar comprises transmitting and receiving circuitry and said antenna is connected to said transmitting and receiving circuitry by an axial feed extending through an antenna of said passive radar.
		A dual mode seeker according to claim 1, wherein the portions of said radome employed by the respective radars are constructed according to the frequency of operation and the physical and aerodynamic requirements of the respective locations on the radome.
		The portions of the radome employed by the respective radars may be constructed according to the frequency of operation and the physical and aerodynamic requirements of the respective locations on the radome.
	www.freepatentsonline.com /6952179.html (1433 words)

	RX12874 Passive Detection ECCM system
		The air defence requirement in UK in the early 1950's was for a system alongside the main conventional radars which would be able to detect and locate individual 'jamming' targets in a mass raid, the majority of which were also jamming, with the same discrimination in range, bearing and height as the 'active' radar.
		The controller could then reduce the radar gain on his display to suppress the jamming signal and vector a fighter on to the jammer using IFF paints and the symbol representing the jammer.
		Each of the radar sites fed their signals into the Air Defence Data Centre at West Drayton where there was not only equipment to control all (but one) baselines simultaneously but also the mechanism to disseminate the detected jammers to the CRCs or CRPs as tracks.
	www.radarpages.co.uk /mob/linesman/pd.htm (1704 words)

	Ukraine Radar/Stealth Detection Systems Sold To Iran
		The relatively cheap Ukrainian Kolchuga radar station, which is able to detect and identify practically all known active radio devices mounted on ground, airborne, or marine objects, actually cancels out all those billions of dollars spent on stealth-based armaments.
		And when the newly independent Ukraine that had only just survived a severe economic crisis, developed an advanced passive radiolocation complex, it was a severe blow to the Americans, who were so sure of their domination in the air thanks to their stealth planes.
		Besides, an attacking object detected by a passive radar is never aware of its detection and so has no reasons to activate its own defenses.
	www.rense.com /general73/detect.htm (2614 words)

	Get the Facts on Radar Detectors
		Rocky Mountain Radar produces what is called a “passive radar scrambler”, but they call it a radar jammer, because the phrase “radar jammer” has for a long time implied a very effective device.
		When radar is triggered from a radar gun, it travels down the highway as an invisible wave and is referred to as the RF signal.
		When the RF signal strikes the car/truck, it also strikes the passive scrambler and the reflection is now called the Doppler Signal, since it changes frequency somewhat as a result of the reflection.
	www.radarjammertechnology.com /support/dont-buy-passive/index.php (489 words)

	GLOSSARY P
		RADAR CROSS SECTION by designing the target surface so that the reflected radar signal from a part of the target cancels the reflected radar signal from another part of the target.
		The polarization signature of a target is proportional to the radar scattering cross section of the target as a function of the angles of polarization of the illuminating and reflected radiation.
		PRIMARY RADAR - A radar in which the return signals are the echoes obtained by reflection from the target.
	www.sew-lexicon.com /gloss_p.htm (6416 words)

	New radar could defeat stealth technology [Free Republic]
		The passive radar listens to low-frequency radio waves and utilizes high-speed computers to distinguish signals that are bouncing off moving objects in the air, ABC reported.
		Passive radar is in use daily around the world and has existed for a very long time.
		A passive radar can indeed determine range and direction; that is exactly what the radar detector on the dash of one's car does; albeit some much better than others and in a relatively crude fashion.
	www.freerepublic.com /forum/a3b29f6c505a3.htm (2165 words)

	Radar Jammer Test from Automobile Magazine - Escort Inc.
		In contrast, a passive jammer transmits nothing but is somehow expected to jam a sophisticated radar with a minuscule amount of reflected energy.
		From Advanced Radar Components in San Diego, the Interceptor (now called the Evader) is a complex unit that depends on two oscillators (one each for X- and K-band), a sixteen-bit microprocessor, and two large and efficient-looking cast waveguide antennas.
		Radar detectors and other Escort products purchased from unauthorized resellers are subject to these unauthorized reseller risks.
	www.escortradar.com /jammer.htm (2760 words)

	Technic - German Naval Radar - Part 3, Radar Designation
		When the family of German radar sets began to grow this was found to be insufficient, and arabic numbers were introduced, 100 to 199 being reserved for naval tactical sets working on a wavelength of 80cm.
		Even a simplified listing of radar type designations, with their technical particulars, would require a intensive research in German and foreign archives, and the interviewing of surviving witnesses by a researcher export in both radio technology and naval history.
		Among them was, presumably, a report on radar (possibly including drawings and photographs of the sets in surviving German naval units), copies of which are probably buried somewhere in the US and British archives.
	www.navweaps.com /Weapons/WRGER_03.htm (909 words)

	Matt Simerson - Rocky Mountain Radar Scam
		An active radar jammer continually scans for police radar; once it detects a signal, it returns a low-power, variable signal that effectively "blanks" the police radar.
		Passive jammers are suppose to re-radiate the radar signal after distorting it (adding noise and/or rapidly shifting frequency) in such a way the true target reflection is masked by the distorted signal.
		On 4 December 1997 the FCC ruled passive jammers violate federal regulations because the jammers radiate RF (Radio Frequency) energy that (or is intended to) adversely affect the ability of law enforcement officials to protect public safety on the highways.
	matt.simerson.net /reference/radar-scam.shtml (1230 words)

	RadarTest.com — Best radar detector reviews from the world’s most respected authority.
		A better idea is to educate yourself on how radar is used in the city.
		Passive radar jammers claim to jam radar by receiving the inbound microwave beam, mixing with it some white noise, then reflecting the altered signal back to the radar, so confusing it that no speed is displayed.
		Passive jammers were invented by Mike Churchman, proprietor of Rocky Mountain Radar.
	www.radartest.com /article.asp?articleid=6000 (1827 words)

	Active and passive radar laser jamming devices
		Passive jammers are legal in all states except OK. MN.
		Active Radar Jammers are illegal to use in the USA therefore Phantom RCD users are responsible for the Phantom RCD operation.
		Radar detectors are some defense against police radar because they can pick up a radar signal well in advance of your being within the radars range of operation.
	www.jammersstore.com /faq.htm (458 words)

	COAST TO COAST AM WITH GEORGE NOORY: SHOWS
		Davenport went on to suggest that passive radar technology could be used to detect any object that reflects radio waves, including UFOs.
		Passive radar "listens" for signals (from television, radio, and cell phone transmissions) that have been reflected off of something in the atmosphere.
		Traditional radar works by sending out radio signals, listening for those signals to bounce off an object (such as a plane) and using the time taken for the round trip to calculate the object's distance.
	www.coasttocoastam.com /shows/2004/07/25.html (429 words)

	Abstracts
		The range and velocity resolution achieved by this radar is substantially superior to that of other comparable coherent scatter radars, and the time resolution is similar.
		After presenting the technical basis for such a radar, we describe an instrument that we are building at the University of Washington to study high-latitude plasma irregularities in the E region.
		Further understanding of auroral electrojet irregularities is impeded by precision limitations of existing instruments, by radar data which may seem incompatible, by the usually poor knowledge of the ambient conditions during these experiments, and by some confusion in the nomenclature (e.g.
	rrsl.ee.washington.edu /abstracts.html (3187 words)

	PHAZER II Radar Jammer
		Today, Rocky Mountain Radar offers drivers like you a perfect solution, the Phazer II Combining a passive radar jammer with an active laser jammer, the Phazer makes your automobile electronically "invisible" to police speed-detecting equipment.
		The radar component works by mixing an X, K or Ka radar signal with an FM "chirp" and bouncing it back at the squad car by way of a wave-guide antenna, effectively confusing the computer inside the radar gun.
		Radar Jammer work by mixing a portion of the radar signal with background clutter, then reflecting it back to the squad car with a special antenna.
	www.radarjammers.tv /phazer_ii_radar_jammer.htm (498 words)

	BW Online \| October 20, 2003 \| Super-Radar, Done Dirt Cheap
		One big plus to the military: passive radar systems are invisible to anti-radar weapons because they don't have their own transmitters.
		Also in late October, radar researchers from around the world will gather in Seattle to discuss recent advances, including passive systems that use FM radio or TV broadcasts instead of cell-phone signals.
		Still, classified research is under way in Europe to create a hybrid surveillance system, using both passive radar and images from the TV cameras that now monitor many urban intersections and streets, airports, and other public places.
	www.businessweek.com /magazine/content/03_42/b3854113.htm (1637 words)

	Passive radar detector for dualizing missile seeker capability page
		Applicants' Passive Radar Detector for Dualizing Missile Seeker Capability incorporates passive RF detectors into a standard active MMW seeker missile with a minimum requirement for hardware modifications.
		Il rivelatore passivo del radar dei candidati per possibilità del cercatore del missile di Dualizing incorpora i rivelatori passivi di rf in un missile attivo standard del cercatore di MMW con un requisito minimo delle modifiche dei fissaggi.
		Le antenne aggiunte intercettano i segnali dell'emissione del radar della difesa di aria e gli elementi di conversione convertono i segnali intercettati in frequenza intermedia (SE) utilizzabile dal radar di MMW.
	www.patentalert.com /docs/001/z00138515.shtml (283 words)

	REMOTE SYSTEMS Escort Passport 4500R 4600R 5000R remote mount radar laser detector ecm 5446 active jammer jamming
		Past radar jammer tests from various national automotive magazines have tested the ECM 5446 against all current past and present (1984 thru 1996) crop of radar jammers currently available.
		Radar Jammer Truths and Myths: Since 1993 (maybe even before) all the "PASSIVE" type radar jammers that have been marketed by various manufacturers (some were just relabeled under a different name) have been proven ineffective by many national magazines and qualified engineers.
		Very dubious indeed since the reason for buying a radar jammer is to protect your car in a radar ambush not a tuning fork on somebody's test bench.
	www.remotesystems.com /company.htm (852 words)

	Cellphone 'radar' tracks traffic flow - 27 October 2003 - New Scientist
		Conventional radar works by transmitting a signal, listening for the reflection and using the time taken for the round trip to work out the object's distance.
		Instead of broadcasting its own signal, a passive radar system listens in to the cacophony of radio signals in the environment and monitors the way moving objects change them.
		Another advantage of passive systems is their ability to spot "stealthy" aircraft and ships, which are designed to fool conventional radar systems by absorbing signals or reflecting them away from the source.
	www.newscientist.com /article.ns?id=dn4299 (690 words)

	Kolchuga Passive Early Warning Radar
		The new-generation strategic long-range passive radar complex "Kolchuga" meets the most stringent moral-ethical and environmental standards as absolutely harmless to people or the environment.
		A complex consisting of three Kolchuga radar stations makes it possible to spot ground and surface targets and trace their movement within a radius of 600 km (air targets at the 10 km altitude - up to 800 km), which makes an effective early warning air defense system.
		The relatively cheap Ukrainian Kolchuga radar station, which is able to detect and identify practically all known active radio devices mounted on ground, airborne, or marine objects, actually cancels out all those billions of dollars spent on stealth-based armaments.
	www.globalsecurity.org /military/world/ukraine/kolchuga.htm (757 words)

	Buyer Beware: Passive Radar Doesn't Work! - RadarBusters.com
		Passive devices are designed on the theory of reflecting back the signal of a police radar/laser gun.
		If you been searching the web for a radar jammer, chances are that you have seen a number of these passive devices advertised that promise to make your car invisible to police radar/laser and that they are so confident that they will pay your ticket.
		Radar Roy has become so frustrated at these false marketing claims that have defrauded the public that he has developed another website: RadarJammer.com.
	www.radarbusters.com /passiveradartestsarticle.cfm (292 words)

Try your search on: Qwika (all wikis)