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From: ralphw@ius3.ius.cs.cmu.edu (Ralph Hyre)
Newsgroups: sci.electronics
Subject: Re: "Spybuster" AD COPY
Message-ID: <5972@pt.cs.cmu.edu>
Date: 24 Aug 89 19:07:39 GMT
References: <17100002@inmet> <647@anasaz.UUCP> <4022@vice.ICO.TEK.COM>
Organization: Carnegie-Mellon University, CS/RI
Lines: 22

In article <4022@vice.ICO.TEK.COM> georgep@vice.ICO.TEK.COM (George Pell) writes:
>As for using the skybuster as an anti-collision alert detector, It
>would respond to my transponder located in my airplane, and would
>ALWAYS be issuing a warning.  In order to be effective, you would
>have to turn off your transponder, which is not especially a good
>idea in high traffic density areas where you could use a collision
>alert.
'Easy' fix: 
Spybuster turns off your xponder for a short time when it's 'listening'
(unless you're in a TCA, where controllers are presumably watching you, maybe
you could put in a hack to infer TCA (or radar-controlled area) from the
amount of time between interrogations,signal strength, and such.)

[this would be the hard part to work out.]
Cost would rise to >1K, since it's 'avionics' and probably has to be certified
and such.

-- 
					- Ralph W. Hyre, Jr.
Internet: ralphw@{ius{3,2,1}.,}cs.cmu.edu    Phone:(412) CMU-BUGS
Amateur Packet Radio: N3FGW@W2XO, or c/o W3VC, CMU Radio Club, Pittsburgh, PA
"You can do what you want with my computer, but leave me alone!8-)"