Posted on 10/07/2014 2:39:45 PM PDT by SeekAndFind
China's DWL002 passive-detection system is capable of directing Chinese air defense systems against enemy stealth fighters, Vassily Kashin, a senior research fellow from the Moscow-based Center for Analysis of Strategies and Technologies, told the Voice of Russia on Oct. 1.
China has devoted huge resources to develop radar systems with the capability to intercept aircraft like the US F-22 and F-35 stealth fighters. The DWL002 was revealed to the public for the first time at the Ninth China International Defence Electronics Exhibition in Beijing in May. The system has a range of 500 kilometers and can detect, locate and track air, sea and ground radiation.
The Global Times, a tabloid published under the auspices of the Communist Party mouthpiece People's Daily reported that the DWL002 will be used for air defense and coastal surveillance in complex electromagnetic environments. The passive radar can track all types of aircraft through low-frequency radio waves without pilots knowing they are being observed or targeted. Kashin said moreover that the DWL002 may have been deployed to frontline units already.
The United States and other Western countries discontinued the development of passive-detection radar systems considering them too large and with questionable accuracy. Russia and China however are among the nations to persevere with the technology. The DWL002 system is designed with technology China acquired from Ukraine.
No it can’t...
Look an F-22 BOOM
I hope it can tell difference between friendly and ‘for’.
And 777s.
And inexact science at best and one which is especially challenged with determining altitude.
Not to mention a PIECE OF CAKE to spoof and make it look like hundred or even thousands of object swirling from all directions:)
This is NOTHING to fret over.
‘Foe’
Dam spillchikker
or should I say , Rook F-22 ,everyone out BOOM
Even the old SLQ-32 would make short work of this.
I gather, from the brief description (low frequency radio), that this "passive" system doesn't rely on reflected energy. I picture some sort of monitored array where disruptions can be detected, and the "timing" of the disruptions across the array can be used to triangulate position.
Obviously they’re disclosing this because they want to help the West to avoid wasting large sums of money on a useless technology. Their altruism is touching. In fact, you’d have to be touched to take their statements at face value.
“First, there’s no such thing as “Passive RADAR”. “
Yes there is. The earliest RADAR was passive. If they had computers like we have today, they would have been infinitely more sensitive.
The Battle of Britain was fought using passive RADAR
It's how they were able to detect out F-117 "stealth" fighters over Serbia some years ago. Passive radar may not be able to get a precise location fix, but it can get a "good enough" location to vector fighters in close enough to get visual, or close enough that the fighters' radars can pick up the "stealth" fighter (it's not completely invisible to radar).
And for the people who say "The F-22 will detect the MiG and shoot it down before it gets close" -- within a few years the Russians and Chinese will have stealth too.
The Battle of Britain was fought with an early version of radar that transmitted radio waves that bounced off objects. It was not passive.
Unlike modern radars, CH aerials did not rotate. A broad beam of radio pulses was transmitted, ‘floodlighting’ a vast area. Chain Home stations were mounted on cliffs and high ground to increase the detection range, which could be up to 320km (200 miles).
The photograph shows the installation at Poling, Sussex. On the left are three in-line 110m (360ft) steel transmitter towers with transmitting aerials suspended between and on the right are four 73m (240ft) wooden receiver towers placed in a square.
Low flying aircraft could escape detection so Chain Home Low (CHL) was developed in 1939 to cope with this problem. CHL’s rotating aerial transmitted a narrow beam, rather like a ‘radio searchlight’.
It could not measure height but could detect aircraft flying at 152m (500ft) at ranges up to 177km (110 miles). The traces were displayed on a circular screen much like modern radar displays. Some CHL stations were set up on cliff tops, but in low-lying coastal areas the aerial was mounted on a 61m (200ft) high tower.
They wish.
RADAR = RAdio Detection And Ranging
In Today’s terminology, Radar is not passive. Radio waves are sent out and the signal that is returned is timed to give the distance (range).
You are thinking of Radio Triangulation. That is easily achievable.... if the object you are tracking is emitting radio waves.
coincidental this pro-piece gets put out there the day after a piece explaining how this radar really isn’t as good as it’s claimed to be, and probably won’t do nearly as well as it’s been feared it will.
they were saying if this would find them, it would likely be because of their datalink systems. maybe they are banking on a lot more data contact between plane and whatever to track those signals.
Additionally, I’m one of the first to complain about what we reveal to the enemy. But does anyone else get the sense that it’s often second generation stuff, even though it may be new to Boris, Fang, Jing and Li? And muzzles? Fugeddaboudit. They’re still in the 7th Century. I hope.
You are correct. Can use the field of cellular and FM radio as the energy field. I’d guess out in the sticks it might get quiet though, but near most targets there ought to be plenty of energy?
The Chinese are, indeed, using RADIO to detect aircraft.
Triangulation is how the Brits used early RAdio Detection And Ranging. This system does the same thing. The run of the mill system today relies on bounced signals, but it can be done in other ways.
Expect a combination of old and new techniques any time changes like low reflectivity (stealth) come to pass.
Any electronic transmissions also announces the plane’s presence, but these new systems are not counting on that.
IR detection has a greater range than aircraft based RADAR, so there is another signature that the Stealth folks work on.
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