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From: rsd@sei.cmu.edu (Richard S D'Ippolito)
Newsgroups: sci.electronics
Subject: Re: POLICE hand-held RADAR units
Message-ID: <12257@as0c.sei.cmu.edu>
Date: 12 Feb 91 17:46:34 GMT
References: <1991Feb12.035201.16098@nntp-server.caltech.edu>
Reply-To: rsd@sei.cmu.edu (Richard S D'Ippolito)
Organization: Software Engineering Institute, Pittsburgh, PA
Lines: 23

In article <1991Feb12.035201.16098@nntp-server.caltech.edu> Fernando J.
Selman writes:


 >Yes, I did get a ticket. It was a 71 on 55 mph freeway. Because that
 >extra 1 mph is so painfull I would like to know how reliable it is.
 >Somewhere in the ticket it is written "Speeding. K-15". So I assume
 >it was a K-band gunn. Because these devices actually compare the speed
 >of the car with the speed of light, it would imply an accuracy of
 >1 part in a billion to be able to measure that extra 1 mph. Because
 >of temperature, and humidity effects I would doubt such a reading (it
 >was made in Honolulu). Anyone with advice? References? Should I contend
 >this ticket? Thanks,
 >			- Fernando


Maybe, but not on the basis of your technical knowledge of radar operation!
I suggest "Introduction to Airborne Radar" by Stimson, published by Hughes
Aircraft Company, Radar Systems Group, as a primer on radar.

Cheers,

Rich