Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!swrinde!zaphod.mps.ohio-state.edu!rphroy!cfctech!joel
From: joel@cfctech.cfc.com (Joel Lessenberry)
Newsgroups: sci.electronics
Subject: Re: R.A.M. (was Re: Police Radar Frequency Info)
Message-ID: <1991Jun21.195857.13956@cfctech.cfc.com>
Date: 21 Jun 91 19:58:57 GMT
References: <1991Jun18.005130.28440@cs.mcgill.ca> <2017@ole.UUCP> <7372@celery15.UUCP>
Sender: Joel Lessenberry
Organization: Chrysler Financial Corp., Southfield, MI
Lines: 32

In article <7372@celery15.UUCP> skeffing@motcid.UUCP (John F. Skeffington) writes:
>In article <2017@ole.UUCP> ssave@ole.UUCP (Shailendra Save) writes:
>>In article <1991Jun18.005130.28440@cs.mcgill.ca>, mingmar@cs.mcgill.ca (Ming MAR) writes:
>>  If RAM worked 100%, like you contend they do, how come
>>  Czechoslovakia has come out with a detection method which can detect
>>  the Stealth aircraft at 250 miles?
>
>Where have you heard about this new detection method?  I do not recall
>any knowledgable person on stealth technology claiming the aircraft was
>invisiable to radar, rather it was difficult to detect.  The implication
>of being able to detect a stealth aircraft at 250 miles woufd be that
>it could detect a "normal" aircraft at several times that distance.  I 
>find this very interesting and would like to know more about it. 
>
   The radars which can detect the stealth fighter are in fact mostly 	
   older, long wavelength systems.

   Some of these systems are classed as Over The Horizen systems, because	   they give some coverage past line of site. The long wavelengh, low
   frequency can be bounced by the upper atmosphere. 

   However, the spatial accuracy of a radar coorespondes to frequency.
   The higher the freq. the greater the accuracy.

   I have heard that while detectable, you only know that the aircraft
   is ... over that away....

                          joel

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