My understanding is that the cell phone has a GPS receiver in it that works
out its coords on the planet from the satellites - just like your GPS
receiver. Those coords are then transmitted over the cell phone network to
the nearest cell phone tower. Your cell phone provider can then pass on
those coords to the 911 system when needed.

If triangulation was used then there would be no need for the GPS system.

Look forward in the future to walking past a restuarant and getting a coupon
code for that resturant immediately sent to your cell phone....sigh...

Andy


-----Original Message-----
From: az-geocaching-bounces@listserv.azgeocaching.com
[mailto:az-geocaching-bounces@listserv.azgeocaching.com]On Behalf Of
Robert & Linda Smith
Sent: Monday, December 27, 2004 12:10 PM
To: listserv@azgeocaching.com
Subject: Re: [Az-Geocaching] GPS cell phones


OK.  I see what you mean.  I think it would be hard for a cell site to
get a fix on your phone.  I believe you would need a couple of signals
and I don't think the cells overlap to the point where you could use
their receivers.  If a cell phone was transmitting ID information to the
cell site, I don't see how another cell site could, also receive it to
begin the job of figuring out the coordinates.  By the same token, I
don't think any 2 or 3 cell sites could send data to the cell phone
where it could figure out "Where am I"  I would like to know more about
how the 911 system will pin point your cell phone.  I understand how the
cell site provider could say you are transmitting from your phone in
such and such an area based on the signal received by the cell site from
you phone.  But that is about all I can come up with right now.  Course,
it took me 2 years to understand how the GPS works,,,, so what do I know....
Bob Smith, Team Petite Elite

Roping The Wind wrote:

>>
>> Rand,
>> A couple of months ago we got the Motorola V60s on Verizon.  I
>> quizzed the kid about the GPS part of the system and he was so vague
>> even when I described our GPS and caching to him.  I don't see where
>> they can have anything in the cell phones that look at all like what
>> we are using for caching.
>> Bob Smith, Team Petite Elite
>
> I dont think that is what the GPS cell phones are about. They arent
> for using as a GPS unit. They have some kind of GPS capabilities built
> into it. I was told it is for 911 situations.. so they know exactly
> where you are. Brian/TeamAI might be able to explain more about this?
>
> Of course, THEY know exactly where you are anytime of day and anyplace
> as long as the phone is on.. the way I see it. ??? I dont like it.
> Just another attempt by our wonderful government to control our lives
> and track us every step of the way, every day.
>
> Scott
> Team RTW
>

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