[FedCom] Re: Advanced Tracking Techniques

[Michael W. Scheel]

Sounds right. I heard that cellfone gps does that. Which explains why when I am working they get the position wrong if I am inside for more than a few minutes. (Nextel w/built-in gps. The yellow handset type). 

Michael W. Scheel N0NGL
Davenport, Iowa USA
WWW.QuadCitiesScan.Com  

-----Original Message-----
From: JETorres <torres.jet at gmail.com>
Date: Sun, 8 Oct 2006 21:06:00 
To:Discussion of Federal Government Communications <fedcom at mailman.qth.net>
Subject: Re: [FedCom] Re: Advanced Tracking Techniques

Maybe they're using a combination of cellphone triangulation,  
'spotty' GPS coverage and dead-reckoning......


On Oct 8, 2006, at 6:42 PM, gary wrote:

> Just how does a GPS work without a clear view of the sky?
>
> Blaine Brooks wrote:
>> Found out that the device the feds use is called
>> Tracker and is made by a company called Orion.
>> The software uses cell modems to transmit and
>> receive data. The tracking transmitter calls into
>> and plots the location of a suspect vehicle by
>> using a secondary program such as DeLorme
>> Street Guide. The transmitter is attached to the
>> suspects vehicle, and can use GPS and cellular
>> technology. The agency involved can remotely
>> program the transmitter to call the district or
>> field office whenever the suspects vehicle is
>> on the move. It's live up-to-the-second data that
>> is extremely accurate, and can be used for
>> great distances and multi-jurisdictional ops
>> (not just local).
>> For those that had had the opportunity to listen
>> to the feds use this over the air, it's definitely a
>> fun listen!

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