Strategies to detect stealth aircraft using passive radar technology.

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    Aircraft Radar
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Discussion Overview

The discussion focuses on strategies to detect stealth aircraft using passive radar technology, exploring the principles of stealth technology, its limitations, and various detection methods including infrared and radar systems. Participants examine the complexities of stealth design and the challenges in countering it.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • Some participants explain that stealth technology relies on absorption and deflection of radar waves, achieved through specific shapes and materials.
  • Others discuss the role of infrared detection, noting that stealth aircraft employ measures to suppress infrared signatures, such as mixing exhaust with outside air and flying at subsonic speeds.
  • A participant mentions a coating with a gradient in intrinsic impedance to reduce radar reflection.
  • There is a discussion on radar cross section (RCS) being influenced by aircraft shape and materials, with techniques like faceting and smooth curvature being highlighted.
  • Some argue that stealth aircraft lose their stealthiness when deploying munitions due to the opening of weapon bay doors, which creates larger radar reflections.
  • Concerns are raised about the effectiveness of infrared detection, with some stating that atmospheric conditions heavily influence its reliability.
  • Participants mention that modern IR systems have improved capabilities, allowing for detection through haze and dust, and that IR missiles can have significant ranges.
  • There is a suggestion that parasite radiation could be a detection method, although it may be countered by electromagnetic jamming.
  • Some participants clarify the distinction between detection and tracking, emphasizing the importance of early detection at long ranges.
  • One participant introduces the idea that stealth aircraft might reduce vulnerability by deploying weapons from the top of the plane.

Areas of Agreement / Disagreement

Participants express multiple competing views on the effectiveness of various detection methods and the implications of stealth technology. The discussion remains unresolved, with no consensus on the best strategies for detecting stealth aircraft.

Contextual Notes

Limitations include the dependence of detection methods on environmental conditions, the complexity of stealth technology, and the evolving nature of radar and infrared systems.

  • #31
Originally posted by S = k log w
Doesn't 'one million' bombs beat ten stealth fighters?

Unless the stealth fighter has a bomb with a nuclear warhead. Or is capable of carrying one. The value of a stealth fighter transcends its actual utility, it is like nuclear submarines. There could be one just outside the capital of a hostile country ready to reduce it to radioactive cinders.
 
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  • #32
Originally posted by russ_watters
The bbc still isn't the source there. It says that right in the title: "Serbs say..." Without REALLY good evidence, there is no reason to believe that just as there was no reason to believe Bagdhad Bob when he said there were no American tanks in Bagdhad. The picture shown doesn't suffice for me (though a military expert could probably identify the markings). Also, it says they captured two crew members. An F-117 has a crew of ONE.

It is not really my job to speculate on the competence of a news agency or its sources. I might add, neither is it yours. I respect your opinion, and your right to present it. So you think that the Serbs were exaggerating. That is OK - I respect that. Keep in mind that there are political reasons why the DoD might not want to admit its prized stealth aircraft got downed by hostile fire. But it also did admit to losing one plane during the conflict (possibly more later, because the report is dated).



In wartime especially (or a report from a combatant in a war), it is essential to step back and consider the credibility of the sources - and the sources sources. I wasn't trying to be coy there. What I meant was it is stealthy enough at all aspects to evade radar. And that should be obvious: if it weren't, it would be of little use in an environment where a threat can come from any direction. One of the other errors in the article about the Australian radar for example was the part about detecting the stealth fighter from above by looking at the cockpit, engine intakes, etc. Thats false - those things are most certainly stealthy. Again, if they weren't the plane would be of limited utility. Those two things did however present major engineering problems - engine intakes are covered with grilles because otherwise you'd be able to see the engine itself. And the cockpit glass is coated because otherwise radar would be able to see the pilot's head. Use radar to "see" the wake left by a plane for example. Yeah ok, S, I've heard of that. But that's not "passive." And decoupling the transmitter and reciever is also not "passive." "Passive" means no transmistter at all, a la infrared.

Of course, I am fully aware that truth is the first casualty of war. But don't forget it works both ways. I'm not saying the F-117 is crap, all I am saying is that it has its vulnerabilities.

As for "passive", I wish to draw your attention to the underlined & bold part of my post regarding the matter:

Originally posted by Tyro:
As for the suggestion on "passive radar", that is, partly, the idea behind one of the types of detection I mentioned, where you have a separate transmitter and receiver (in the developed case it was actually supposed to use mobile phone transmitters! Which, as you know, are scattered nicely across a country). Unexpected and unexplained changes in the 'background' signal suggest the presence of stealth aircraft.
 

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