[FedCom] Re: Advanced Tracking Techniques

[JETorres]

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!