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Not to sound like an F-22 cheerleader but I thought this was interesting. . .



 
 
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  #1  
Old May 18th 04, 04:54 PM
Denyav
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The F-15s, with very good
radars, were not able to pick up and understand where the F/A-22s
were, and the F/A-22 was looking at the F-15s all the time.”


As I said numerous times no old fashioned backscatterer radar,no matter how
good they are,no matter if they are airborne or ground based, wont be able to
see f22 frontally,until its too late.
Thats the reason why air force develops an "airborne" multistatic system using
UCAVs.
Secretary of course forgat to mention that.
  #3  
Old May 18th 04, 06:15 PM
Denyav
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He also forgot to mention all the countries using such a system. Oh
yeah. There aren't any.


He should demonstrate f22(or any other stealth plane) capabilities aganist
silent sentry not aganist 5 or 50 F15s.Or he should have mentioned something
about air forces own UCAV based multi static detection system development
program.
BTW as far as I can remember I used the word "develops" not "uses" in my post.
Ground based silent sentry is in use but UCAV based system is still in
development.
  #5  
Old May 19th 04, 01:57 AM
phil hunt
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On 18 May 2004 16:15:08 GMT, Denyav wrote:
He also forgot to mention all the countries using such a system. Oh
yeah. There aren't any.


He should demonstrate f22(or any other stealth plane) capabilities aganist
silent sentry


What is "silent sentry"?

--
"It's easier to find people online who openly support the KKK than
people who openly support the RIAA" -- comment on Wikipedia
(Email: zen19725 at zen dot co dot uk)


  #6  
Old May 19th 04, 02:20 AM
Yeff
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On Wed, 19 May 2004 00:57:56 +0100, phil hunt wrote:

What is "silent sentry"?


From http://www.dtic.mil/ndia/jaws/sentry.pdf

The heart of Silent Sentry is its innovative Passive Coherent Location
(PCL) technology developed by Lockheed Martin Mission Systems, which uses
everyday broadcast signals, such as those for television and radio, to
illuminate, detect and track objects. A passive detection system for U.S.
government civil agency and military purposes, Silent Sentry transmits no
radio frequency (RF) energy as conventional radar does and has no RF
"signature" to alert enemy threats. Instead, it can use the energy that
already exists in airspace for detection purposes, and does not adversely
affect or harm the environment.

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-Jeff B.
yeff at erols dot com
  #7  
Old May 19th 04, 07:23 AM
John Cook
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On Tue, 18 May 2004 20:20:21 -0400, Yeff wrote:

On Wed, 19 May 2004 00:57:56 +0100, phil hunt wrote:

What is "silent sentry"?


From http://www.dtic.mil/ndia/jaws/sentry.pdf

The heart of Silent Sentry is its innovative Passive Coherent Location
(PCL) technology developed by Lockheed Martin Mission Systems, which uses
everyday broadcast signals, such as those for television and radio, to
illuminate, detect and track objects.


Just like the celldar system from Roke Manor then...

cheers

A passive detection system for U.S.
government civil agency and military purposes, Silent Sentry transmits no
radio frequency (RF) energy as conventional radar does and has no RF
"signature" to alert enemy threats. Instead, it can use the energy that
already exists in airspace for detection purposes, and does not adversely
affect or harm the environment.


  #8  
Old May 19th 04, 06:13 PM
Denyav
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Just like the celldar system from Roke Manor ...

Which is a subsidiary of German electronics giant Siemens.
  #9  
Old May 19th 04, 06:21 PM
Denyav
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The heart of Silent Sentry is its innovative Passive Coherent Location
(PCL) technology developed by Lockheed Martin Mission Systems, which uses
everyday broadcast signals, such as those for television and radio, to
illuminate, detect and track objects.


BTW (West) Germans were first to devolop a multi static detection and tracking
system in 70s .Even before Firefly!.

  #10  
Old May 19th 04, 06:27 PM
Denyav
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Just like the celldar system from Roke Manor then...


Roke Manor (Siemens) system is optimized aganist stealth aircreaft at medium
altitudes,whereas Silent Sentry is also very effective aganist next generation
stealthy cruise missiles that employ terrain masking in addition to stealth.
 




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