DWL-002 Passive Detection Radar System Able to Detect Stealth Aircrafts

[The SC]

DWL-002 passive detection radar. by monitoring electromagnetic
signals including military radar, microwave communications,
electromagnetic signal reflections, determine CMM positional
parameters of signal reflection

DWL-002 to locate, identify and track electronic intelligence detection
system, used as a passive 3D air defense radar range to 500 km

Anti-Stealth Radar

DWL-002 passive radar detection system using multi-station layout, the base station will capture the signal, the signal to reach the station by calculating the time difference, you can calculate the radiation source and the distance difference between each station, and then find the coordinates of the target in the air.
Western military experts in the eyes of Chinese-made radar system is its large number of weapons systems from the world's advanced level in the latest weapons and equipment. China has successfully developed in many anti-stealth fighter radars in, DWL-002 passive detection radar system is an outstanding representative. Held in 2011, in the Fifth World Radar Fair, Southwest of China Electronics Technology Group Institute for electronic equipment, its first time to display DWL002 passive real photos, despite being placed in less prominent position, but soon as he appeared on the trigger. The great interest of foreign media. Which the radar is called the U.S. military's most advanced stealth fighter F-22 killer. So, what specific functions which the radar, its appearance will air on the future and what impact it?
According to some Chinese media reports of military authority, DWL002 passive detection radar system is a can of air, ground and sea targets to locate, identify and track electronic intelligence detection systems, as the passive use of three-dimensional radar, range up to about 500 km.
Reportedly, the Chinese used to test DWL002 of enemy stealth target detection capability of the simulated target, the recent appearance of the radar cross section just less than 0.01 square meters of "Dark Sword" unmanned stealth testing machine. Based on the data, this detection system can accurately identify and determine the location of the target air stealth features, which can meet China's air defense forces to use air defense field. The system not only has excellent anti-stealth performance, but not because of their own to any electromagnetic radiation, it can be against enemy electronic jamming and anti-radiation missiles to destroy, survive are strong.
So, this is how the radar detection of stealth fighters do?
This is the first stealth fighters need to understand the working principle. As we all know, in recent years, stealth technology has almost become a modern and advanced ships and aircraft of the standard, it is the most advanced machine of a key indicator of the Five Generations, the principle is effectively absorb or reflect enemy radar signals to achieve stealth conventional, traditional difficult to deal with this type of active radar stealth air targets.
However, the stealth fighters are also significant weaknesses. In order to maintain a strong enemy detection capabilities, so that before the enemy attacks, are equipped with more powerful features and power of airborne phased array radar; Five Generations machines in order to achieve the necessary The "supersonic cruise" capability, stealth aircraft are equipped with a larger engine thrust. This leads to the enemy radar absorbing stealth fighter, while he has had a more prominent signal of radar and infrared radiation, like a dressed in black, face painted flashlight in the dark ink has the room to steal the Robber .
DWL002 passive detection radar system is the use of stealth fighter technology, the inevitable weaknesses of its own stealth fighter by monitoring the electromagnetic signals, including military radar, microwave communications, civilian radio, television transmission civilian, civilian microwave communications, the class mobile base station signal disturbance hand, receive and analyze the faint reflection of electromagnetic signals to determine the source of the coordinate location signal reflection parameters, and then through the data link these parameters to one's own ground air defense missile units, which in most within the right time to attack enemy targets hidden opportunities.
Western military experts in the eyes of the Chinese radar technology is close to the area of the world's advanced level of armaments, and many military experts believe, DWL002 passive detection radar system in a given period, the Chinese anti-stealth radar technology is a world leader position. Because any country, to develop advanced performance and proven anti-stealth technology, the most important pre requisite is that you must first have a grasp or a more advanced stealth technology. The world mainly in the three countries with the ability to Russia.
Although Russia has successfully developed and ability to have some T-50 stealth fifth-generation fighter demonstrator, and is expected within the next few years in service, but Russia still much to be desired, mainly because Russia's economic growth is a serious imbalance so microscopic in the short term benefits do not want the equipment to invest in areas.
For the United States, although it has equipped the most advanced F-22 "Raptor" fighters, F-35 projects in full swing, but two fighters in the development and use of frequent problems, the U.S. spent a lot of budget, together with the United States has to build on the improvement of detection systems during the Cold War, so did not invest heavily in anti-stealth radar.
In contrast, China is not only stealth fighters from other countries facing a serious threat, and the choice is low developed stealth fighter, the simultaneous development of anti-stealth technology, air force development, but also from the practical needs of the economy and the combined strengths, the latest Chinese-made passive radar detection system DWL002 undoubtedly superior to other similar equipment.

Epoch-making impact of the anti-stealth radar
United States, "Strategy Page", the UK, "Flight International" Web site has disclosed an "anti-stealth wars." Allegedly, Andrews Air Force Base in 2009 at a public exhibition, it was surprised to find that an EA-18G "Growler" electronic aircraft (the F-18 "Hornet" aircraft carrier improved from) machine body coated with a F-22 design. According to Air Force practice, the fighter pilots scored victories in combat, the EVA in the driver's seat of the body spray pattern and number of enemy aircraft shot down. According to the aircraft pilot revealed that EA-18G aircraft had traveled to Nellis Air Force Base, U.S. Air Force to participate in joint military exercises, the exercises were made during "shot down the F-22 victories." "Strategy Page" website in the evaluation of the results have held that the EA-18G may be equipped with electronic jamming equipment to help its "shoot down" the F-22. The article also stressed that regardless of this result is not true, a powerful electronic jamming system does have the ability to suppress the stealth fighter.
Recently, it was rumored on the Internet, the Russian air defense forces rely on "armor" to a radar tracking F-22 "Raptor" stealth fighter to say. Can be seen in stealth technology continues to mature, the military power has been striving to find counter measures.
China's anti-stealth radar outside of concerns, one important reason is to analyze the air and the whole of the development of five generations of machines may have a significant impact. Although the United States and Russia had in the development of anti-stealth radar to invest less, but as China's debut anti-stealth radar, as well as accelerate the development of J-20 fighter, believe in war "absolute advantage" in the United States, will accelerate this type of radar system development, even with strong technical strength may overtake China. Marks the advent of anti-stealth radar, the future of air combat this trend will change, from simple fighters are increasingly turning against the military-related systems as a whole confrontation.
So, in the anti-stealth radar appearance of cases, countries are also necessary to continue to develop the Five Generations machine? For China, even if China is to develop future aircraft J-20 as the main fighters, but its greater significance lies as a high-tech weapons technology verification platform, the development process of the continuous generation of advanced technology has been continuously applied to the improvement of aircraft upgrades on active duty. These new technologies to upgrade the aircraft after retirement, when really, it is precisely the date of maturity of these technologies. For the United States, "Raptor" and "Joint Strike Fighter," the lessons of cost overruns has told the U.S. military, in the absence of low-cost new technology before the development of new technology can cause to believe the cost soar and long-term can not create actual combat the terrible situation. Slow the development of new aircraft, while using advanced technology to improve existing weapons and equipment, the development of many countries may be selected.
Not long ago, Boeing was introduced in the context of the F-15SE "Silent Eagle" fighter.
In addition, the definition of Five Generations machines may also be this correction. Five Generations machines in the United States under the "5S" standard, the supersonic cruise capability is a worthy, better ability to detect and combat aircraft is the future direction of development. But it may no longer stealth performance to demanding, so because of the excessive pursuit of stealth technology to affect the overall aircraft performance. After redefining the fifth-generation fighter, in fact, very similar to today's "fourth generation semi-" fighter, but when combined with a number of fifth-generation fighter technology, the more powerful it just all aspects of performance.
With the latest model of DWL002 passive detection radar system, the Chinese have the ability to capture and make use of the signal, so that to enter the Chinese air defense identification of U.S. stealth fighters circle no hide.


DWL002 "Anti-Stealth" Radar to Tested Dark Sword UCAV

Dark Sword


Stealth technology has changed the method of air combat, in particular, stealth aircraft and precision guided weapons, the combination of greatly improved operational efficiency, changing the offensive and defensive strategic balance. The development of anti-stealth technology and weapons systems have become an important and urgent task, and anti-stealth research or the development of stealth technology and the driving force of a stimulus, but also check to verify the performance of their indispensable weapons and stealth means.
DWL002 passive detection radar system is a can of air, ground and sea targets to locate, identify and track the electronic intelligence detection system, which can be used as a passive three-dimensional radar, range up to 500 km. It is a strategic and tactical electronic intelligence and passive surveillance systems. Itself does not radiate electromagnetic signals, but the use of external non-cooperative (ie radiation and radar, "do not take the world", there is no direct relationship between coordinated operations) of the radiation source to detect and locate. Difficult to deal with active radar stealth air targets, while the ears of the system are sharp-eyed soul, able to detect the target even if it is issued by weak or electromagnetic transient electromagnetic signal reflected signals, immediately to targets on the radar screen visible. The layout of the system is usually composed by the four sub-stations: the main station as an electronic warfare center, the analysis and processing center, generally located in the central area, the other three signal receiving stations are located in the surrounding areas, round or curved layout to the main station the layout of the center circle, the system started after deployment, the distance between station and station 50 km. Located in front of the terminal to capture electromagnetic signals to the target immediately after the signal sent to the Electronic Warfare Center, station, central station using multi-directional cross-cutting and other methods to detect the location of targets, the target height of the signal captured by the receiving station to determine, to coordinate the target location.
When the system is deployed in place, according to the command center of the command, simultaneously on land, sea and air search for the passive early warning and reconnaissance. Invisible to the radar target detection, for example, when the target appears, it will certainly be passing through the airspace of the various types of electromagnetic waves, including military radar, microwave communications, civilian radio broadcasting, television transmission of civil, civil microwave communications, the Mobile phone base stations and other class a certain perturbation signal, which is like the calm water in the flying swallow the water after grazing will have a slight ripple, will cause some signal reflection. DWL002 is able to receive and analyze the master of weak electromagnetic signal reflection and analysis of immediate settlement through the center of the computer calculated the corresponding data, thereby to determine the source of the coordinate of the location of signal reflection parameters, and then, through the data link or other information transmission channel, these parameters are passed to one's own anti-aircraft missile units on the ground or air forces, resulting in the most appropriate time to get the opportunity to attack the enemy's stealth targets.
Allegedly, the Chinese used to test DWL002 target the enemy capability to detect stealth simulation goal is to just show up in recent years, cross-section of radar reflectivity is less than 0.01 square meters of "Dark Sword" stealth unmanned test machine. Based on the data, this detection system can accurately identify and determine the location of the air properties stealth targets, and high positioning accuracy, which can be with my air field air defense forces to use.
In addition to the battlefield as a general early warning and reconnaissance tasks, all of the other effect is the passive radar for air defense surveillance radar main, reduced exposure to the electromagnetic characteristics of other radar and location opportunities for each other in this area of electronic surveillance without power and return, this role is very great significance! United StatesAir ForceIn recent years, the war, why can often play a large exchange ratio of air superiority? It's tactical stealth aircraft are often the first to use pre-ground surveillance radar system a good clean out, so that the other types of radar in the absence of early warning aircraft and air in the case of the blind can not command a decent state of air combat, the aircraft can take off only by virtue of their capability to detect conflicts, often only were bashing, it is impossible to obtain any record!
The system not only has excellent performance of anti-stealth, and not because of its own to any electromagnetic radiation, it can be against enemy electronic jamming and anti-radiation missiles to destroy the survival ability. Passive radar system eliminates the need for expensive high-power transmitter, transceiver switches and related electronic equipment, making the system significantly reduced manufacturing and maintenance costs, lower life cycle cost, and time-domain all-weather and all work effectively.
Currently, there are many countries interested in the application of passive detection technology. • Lockheed Martin is the first one of the companies involved in the field, allegedly relying on television and radio transmitters, the passive detection range of the system to 220 km.
U.S. Department of Defense and the Defense Research Projects Agency in advance the University of Washington, Georgia Tech University and other universities and companies such as Raytheon, have carried out research in this field. In Europe, France also carried out the corresponding technical studies, demonstrated a prototype system of Italy, the UK is studying the passive coherent radar and "cellular" radar (Celldar), Russia and Ukraine developed the "armor" radar, the Czech Republic has developed a well-known The "Villa"-E Passive Radar and export many countries.
Stealth aircraft in the face of a direct threat to the United States and, therefore, special attention to anti-stealth technology research. With the exception of Southwest Research Institute developed DWL002 electronic devices, but China has also successfully developed the YLC-20 measured bistatic passive radar system, to and positioning, both of the radar function is almost, but DWL002 something more advanced. Same resonant radar detecting stealth targets are also built in 2001, up to 2,000 km from its role, in addition, said China has also developed a dedicated to detecting stealth aircraft, JY-27 solid-state VHF Radar, to detect not only more effective stealth target, and to anti-radiation missile attack.
As the saying goes, there must be a spear, shield, the development of stealth technology in today's world also gave birth to more anti-stealth technology. Now or in development initiatives and other means of anti-stealth technology also includes the long-wave or millimeter wave radar, carrier-free ultra-wide band radar, laser radar and infrared detection systems, passive radio frequency detection technology, Earth's magnetic field variability detection technology.
To fight against stealth aircraft, they must take various measures and means comprehensive. Reliable anti-stealth detection / attack system, the key is to form a different principle and the complexity of the work of different wavelengths on the sensor network. An important part of this network includes not only the sensor itself, but also on the different sources of data collection, processing, correlation and display process.
In addition, in order to achieve the required high detection probability of interception system to provide precise target data, the location of the sensor (not only to the territory along the border and deployed in depth, including air, space guard) is also critical. Therefore, the future of the anti-stealth detection system, is likely to be land, sea, air, space an integrated system, the development of radar, passive detection, perhaps the key point.
DWL002 passive detection radar system is the world's most advanced anti-stealth aircraft's radar system, its main performance is better than similar foreign radar, therefore, expected that the system will be a lot of the same stealth aircraft threats facing the country of choice.

http://errymath.blogspot.com/2014/05/dwl-002-passive-detection-radar-system.html

 

[Naif al Hilali]

@gambit
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[gambit]

This passive detection method using opportunistic sources, such as TV and cellular communication signals sources, have been discussed before.

So here it is...

The foundation of the passive detection method, aka 'passive radar', rests upon the physical separation of the transmitter and receiver parts of the total radar detection process. In other words, instead of one antenna station doing the transmission and reception duties, have two antenna stations where one does the transmission and the other does the reception.

This is called the bi-static radar configuration...

The relationship between the transmitter, target, and receiver is called the bi-static triangle.

But here lies the weakness...

Destroy the transmitter and there will be no radar detection process.

If the transmitter is a cellular and/or TV stations, then remove power from them by way of attacking the city's infrastructure. I do not care how many receiver stations are out there. I only care about the one or the few transmission sources. Destroy one or more will create gaps in the radar detection net. That is all I need.