Stealth Detection, page 1
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Topic started on 9-11-2004 @ 04:03 PM by J Rock
Very interesting read

Radar Detected

By Tomas Kellner

Rule number one for defense contractors: Don't tick off the U.S. government. A small Czech tech firm called Era developed and last year started selling a $10 million radar that can detect stealth jets, those heretofore invisible aircraft.

It lined up as possible buyers such countries as China, Pakistan and Vietnam.

This didn't please the U.S., which this fiscal year plans to spend $4.7 billion on 24 F-22 stealth striker jets and millions more to upgrade its two other stealth aircraft, the B-2 bomber and the F-117 Nighthawk.

So the U.S. bought one of the Czech radars, called Vera-E, to test its "effectiveness and technical aspects," according to Deputy Secretary of State Richard Armitage. Vera apparently works, or at least well enough that the U.S. State Department suggested the Czech government reconsider foreign sales of it. China had ordered six of the machines. A U.S. ally and NATOmember since 1999, the Czech Republic scuttled the sale. "We discussed the issue with them, but the decision was theirs," said State Department spokesman Richard Boucher.

Vera works by listening for signals emitted by the planes it follows. It consists of three antennas and one central module, which triangulate and track as many as 200 targets at once from as far as 280 miles away. The mobile antennas fit on a truck; since they do not send out any signals, Vera is extremely hard to find and destroy.

At the moment the 140-employee Era has a nice product--but it has sold only two so far. Chief Executive Miroslav Sotona declined comment.


-J~Rock

Edit: Please post a link to your information, article, etc. Common ATS practice/standard. Avoid total copy-n-paste jobs also.
Here is the link to the above article:
Radar Detected
When applicable, ALWAYS give proper credit to your source(s)


[edit on 17-11-2004 by Seekerof]


reply posted on 17-11-2004 @ 01:58 PM by J Rock
Take a look at the last paragraph here

It says "The system uses techniques that allow it to process signals emitted by airborne...secondary surveillance radar/'identification friend or foe transponders..." and so forth.

The point I wanted to bring up is that it can detect secondary surveillance radar and IFF signals. All aircraft emit an IFF signal. The F-117 also utilizes a FLIR for targeting, which I conclude to be a secondary surveillance radar.
The point being that Steath Aircraft, although "invisible" to radar, do seem to have other vulnerabilities.


reply posted on 18-11-2004 @ 01:08 PM by longbow
Originally posted by J Rock
Take a look at the last paragraph here

It says "The system uses techniques that allow it to process signals emitted by airborne...secondary surveillance radar/'identification friend or foe transponders..." and so forth.

The point I wanted to bring up is that it can detect secondary surveillance radar and IFF signals. All aircraft emit an IFF signal. The F-117 also utilizes a FLIR for targeting, which I conclude to be a secondary surveillance radar.
The point being that Steath Aircraft, although "invisible" to radar, do seem to have other vulnerabilities.



Just because aircrafts now emits IFF signales doesn't mean they need to do it always, especially during single stealth attack mision.

FLIR is NOT RADAR. It is passive forward looking IR system and sends no EM waves.


reply posted on 25-11-2004 @ 08:03 PM by J Rock
I stumbled upon this article on fas



Another limitation of stealth aircraft is their vulnerability to detection by bi-static radars. The contouring of a stealth aircraft is designed to avoid reflecting a radar signal directly back in the direction of the radar transmitter. But the transmitter and receiver of a bi-static radar are in separate locations -- indeed, a single transmitter may be used by radar receivers scattered over a wide area. This greatly increases the odds that at least one of these receivers will pickup a reflected signal. The prospects for detection of stealth aircraft by bi-static radar are further improved if the radar transmitter is space-based, and thus viewing the aircraft from above, the direction of its largest radar cross section.


I looks like they are more vulnerable than we are being led to believe


reply posted on 16-12-2004 @ 09:30 AM by J Rock
Here is a new angle that we can take on this. Stealth detection is not limited to Aircraft. Here is an article on LO Cruise Missile detection. So is it suffice to say that if we can detect a stealthy cruise missle, we should be able to detect any LO aircraft?



In this project, we have developed computationally efficient algorithms and adaptive architecture with optimized overall performance (statistical and computational) for real-time reliable detection and tracking of low-observable targets in IRST systems. Despite the fact that we focus on an IRST against cruise missiles over land and sea cluttered backgrounds, the results are equally applicable to other sensors (e.g., Radar, Lidar) and other kinds of targets (e.g. ballistic missiles).

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