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Originally Posted by StainlessSteelCynic
Was re-reading this thread and remembered that I wanted to mention something about this comment.
If Australia has the technology to detect the B-2, what makes you think the Russians don't?
Yes the B-2 has radar-absorbent materials and a shape that make it almost invisible to conventional radar but it is not totally invisible, it has a much smaller Radar Cross Section and has the radar appearance of something like a small flock of birds rather than as an aircraft. Most radar operators would dismiss it as a false return.
But the real kicker is that you don't look for the aircraft, you look for the wake it leaves in the air, something which can be detected by weather radar. The turbulence caused by a large aircraft cannot be made "stealth" and will be detected if people know what to look for.
This capability is also possessed by Over-The-Horizon Backscatter military radar and has been known about since the late 1980s.
Newer developments in radar are making use of this concept to detect distortions in not just the airflow but in other forms of radiation such as television and radio broadcasts. The use of longer wavelengths rather than the standard radar wavelenghts has also proven successful in detecting stealth aircraft, this is how the Sertbians detected and shot down the F-117 in 1999.
Also, because all aircraft create friction with the surrounding air, it is conjectured that high sensitivity IR systems could detect the passage of stealth aircraft by the heated air caused by this friction.
The Stealth Bomber can be detected and if Australia can do it, then the Russians certainly have the ability to do it.
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Well I think with the JORN network the Americans helped the Australians a little bit to develop it as Lockheed-Martin had a role in its development, but certainly a lot of the technology was developed by Australia. Project Dundee which tested its sensor capabilities was conducted with the US.
The Soviets/Russians have been tinkering with OTH radars as early as the 1950's. They had two early systems operating from the mid-to-late 1970's; one near Chernobyl covering the US East Coast and Europe, and another in Siberia covering the US West Coast and Alaska. How effective they were in comparison to American OTH systems is open to speculation but they were decommissioned in 1989. The Russians claim that they have an operational OTH system operating in the Russian enclave of Kaliningrad (formerly German East Prussia) located between Lithuania and Poland that has a detection range of 6,000 kilometres ,which covers all of Europe and can monitor airspace between the North Pole and North Africa. They also claim to have two other similar systems in the Krasnodar region near the Black Sea and near Irkutsk in Siberia. Similar may mean less capable.
Russia also claims they have a new system called Container that has a range of 3000 kilometres. China and Iran also claim to have OTH systems, the Iranian system also has an alleged range of 3,000 kilometres and both countries almost certainly use Russian technology, probably less capable than what the Russians have themselves.
As far as I can see the implication of this is that outside of Western allied installations Russia may possibly have some capability to detect a USAF B-2 approaching Russian territory from the traditional route over Europe and the Arctic, but beyond that I doubt they could detect one or could China or Iran.