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Whats the Smallest GPS Transmitter?

 
 
Audi
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      05-17-2004, 03:08 PM
I am looking for something as close as possible to what you see in the
James Bond movies. Something that can be adhered or at the very least
placed into a vehicle, wireless, battery operated, that transmits its
location. I assume a service would be involved, and preferrably some
sort of internet map tracking available with that service.

The smallest I have found thus far for $399 plus $25 a month service
fee is the child tracking watch here:

http://www.safetyandsecuritycenter.c...chillocwa.html

Fully charged it lasts 60 hours (a little over 2 days) and it
transmits up to 40 "locates" during that time.

So its not real time and what I am looking for does not have to be
real time. I assume battery life would eliminate that possibility.

There must be something like this out there, that isn't shaped like a
little kids watch. Can anyone direct me to all the ones they're aware
of? A friend of mine *claims* there is something you can magnetically
attach to metal and it transmits. I've looked and found nothing of
the sort.

Thanks.
 
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Sam Wormley
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      05-17-2004, 04:54 PM
Audi wrote:
>
> I am looking for something as close as possible to what you see in the
> James Bond movies. Something that can be adhered or at the very least
> placed into a vehicle, wireless, battery operated, that transmits its
> location. I assume a service would be involved, and preferrably some
> sort of internet map tracking available with that service.
>


The satellites are the transmitters.... or are you referring to a
transmission from another vehicle. The James Bond thing would have
required an unwilling transmission from the "bad guy's" vehicle or
some real time aerial surveillance system in the region... or radar on
the "good guy's" vehicle.
 
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Vincent van der Laan
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      05-17-2004, 05:14 PM
On 17-05-2004 17:08, in article
http://www.gps-forums.net/(E-Mail Removed), "Audi"
<(E-Mail Removed)> wrote:

> I am looking for something as close as possible to what you see in the
> James Bond movies. Something that can be adhered or at the very least
> placed into a vehicle, wireless, battery operated, that transmits its
> location. I assume a service would be involved, and preferrably some
> sort of internet map tracking available with that service.
>
> The smallest I have found thus far for $399 plus $25 a month service
> fee is the child tracking watch here:
>
> http://www.safetyandsecuritycenter.c...chillocwa.html
>
> Fully charged it lasts 60 hours (a little over 2 days) and it
> transmits up to 40 "locates" during that time.
>
> So its not real time and what I am looking for does not have to be
> real time. I assume battery life would eliminate that possibility.
>
> There must be something like this out there, that isn't shaped like a
> little kids watch. Can anyone direct me to all the ones they're aware
> of? A friend of mine *claims* there is something you can magnetically
> attach to metal and it transmits. I've looked and found nothing of
> the sort.
>
> Thanks.


You wouldn't be able to stick it under a car: no GPS signal available there
(metal blocks the signal).
So you would have to stick it on the roof, where it would be found
immediately of course. Now you could hide one in the roof of a convertible
of course...

Vincent

 
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Peter
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      05-17-2004, 05:37 PM
Vincent van der Laan wrote:
>>I am looking for something as close as possible to what you see in the
>>James Bond movies. Something that can be adhered or at the very least
>>placed into a vehicle, wireless, battery operated, that transmits its
>>location. I assume a service would be involved, and preferrably some
>>sort of internet map tracking available with that service.


> You wouldn't be able to stick it under a car: no GPS signal available there
> (metal blocks the signal).
> So you would have to stick it on the roof, where it would be found
> immediately of course. Now you could hide one in the roof of a convertible
> of course...
>

Lots of other reasonable hiding places where you'd get reasonable
reception, albeit not optimal. For example, our car bumpers have good
hidden spots for a GPS antenna where it would only be covered with
plastic (i.e. transparent to 1.5 GHz) and would have a good skyview.
If you have access to the interior of the car then there are more
possibilities - under cutouts in the rear package shelf, under plastic
portions of the dash, behind rear-view mirrors (many have plastic
enclosures large enough for a hidden antenna), etc.

 
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Andreas van Hooijdonk
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      05-17-2004, 05:37 PM
It is maybe too big for you, but this is a nice one
http://www.trimble.com/trimtrac.html

You could also look for a Personal Locator here
http://www.gps-practice-and-fun.com/...-tracking.html

No thanks

--
Andreas van Hooijdonk
http://www.gps-practice-and-fun.com



"Audi" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) om...
> I am looking for something as close as possible to what you see in the
> James Bond movies. Something that can be adhered or at the very least
> placed into a vehicle, wireless, battery operated, that transmits its
> location. I assume a service would be involved, and preferrably some
> sort of internet map tracking available with that service.
>
> The smallest I have found thus far for $399 plus $25 a month service
> fee is the child tracking watch here:
>
> http://www.safetyandsecuritycenter.c...chillocwa.html
>
> Fully charged it lasts 60 hours (a little over 2 days) and it
> transmits up to 40 "locates" during that time.
>
> So its not real time and what I am looking for does not have to be
> real time. I assume battery life would eliminate that possibility.
>
> There must be something like this out there, that isn't shaped like a
> little kids watch. Can anyone direct me to all the ones they're aware
> of? A friend of mine *claims* there is something you can magnetically
> attach to metal and it transmits. I've looked and found nothing of
> the sort.
>
> Thanks.



 
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Karl Juul
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      05-17-2004, 10:27 PM

"Vincent van der Laan" <(E-Mail Removed)> wrote

> You wouldn't be able to stick it under a car: no GPS signal available

there
> (metal blocks the signal).


This may be changing...
One commercial product claims a patent-pending antenna which receives from
under the vehicle:

"Exclusive GPS-StealthT Antenna (Patent Pending). All other GPS antennas
require visible installation or time consuming installation. The GPS-WebT
simply hides under the vehicle magnetically, in seconds. The GPS-StealthT
Antenna does not require direct line of sight or conspicuous and erratic
performing "edge-of-vehicle" mounting in order to communicate with GPS
satellites. Only the Patent Pending GPS-StealthT Antenna system utilizes an
adaptive learning algorithm which allows the GPS antenna to be hidden up to
28" underneath the vehicle while achieving over 90% of the efficiency of a
traditional roof mounted GPS antenna."

I use vehicle tracking equipment by another vendor which requires a small
remote patch antenna which is often able to be concealed under a plastic
bumper cover where it is essentially out of sight, but this "Stealth"
antenna would sure cut down installation time, if it works, that is.

Karl


 
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John Tserkezis
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      05-17-2004, 11:13 PM
Karl Juul wrote:

> This may be changing...
> One commercial product claims a patent-pending antenna which receives from
> under the vehicle:


(snip)

>... The GPS-StealthT Antenna does not require direct line of sight ...


Do you have a URL for this? I can smell the farm animals from here.

--
Linux Registered User # 302622 <http://counter.li.org>
 
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Karl Juul
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      05-17-2004, 11:45 PM

"John Tserkezis" <(E-Mail Removed)> wrote

> > This may be changing...
> > One commercial product claims a patent-pending antenna which receives

from
> > under the vehicle:

>
> (snip)
>
> >... The GPS-StealthT Antenna does not require direct line of sight ...

>
> Do you have a URL for this? I can smell the farm animals from here.


http://www.covert-gps-vehicle-tracking-systems.com/

BTW, this is a $2400 unit, cheap compared to what I'm using...

Karl


 
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Audi
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      05-18-2004, 05:35 AM
Vincent van der Laan <(E-Mail Removed)> wrote in message

> You wouldn't be able to stick it under a car: no GPS signal available there
> (metal blocks the signal).


So what is the point of the childs watch? Unless he is outside in
plain sight, wouldn't it be pretty much useless? If he were inside a
building of any kind, or even in a car, it wouldn't transmit.

I didn't realize we were still this incredibly behind in our GPS
technology capabilities. I have a feeling the millitary bypassed this
silly obstacle years ago. We're probably just seeing the very first
versions of GPS technology in the consumer realm.

Question 2: If you were to toss the watch into someone's car under
the seat, or in the glove compartment, it would not transmit
consistently?
 
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Tony Clark
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      05-18-2004, 05:55 AM

"Audi" <(E-Mail Removed)> wrote in message
news:(E-Mail Removed) m...
> Vincent van der Laan <(E-Mail Removed)> wrote in message
>
> > You wouldn't be able to stick it under a car: no GPS signal available

there
> > (metal blocks the signal).

>
> So what is the point of the childs watch? Unless he is outside in
> plain sight, wouldn't it be pretty much useless? If he were inside a
> building of any kind, or even in a car, it wouldn't transmit.
>
> I didn't realize we were still this incredibly behind in our GPS
> technology capabilities. I have a feeling the millitary bypassed this
> silly obstacle years ago. We're probably just seeing the very first
> versions of GPS technology in the consumer realm.
>
> Question 2: If you were to toss the watch into someone's car under
> the seat, or in the glove compartment, it would not transmit
> consistently?


I think there is a misconception here. It's my understanding that the kid
locator watch uses the cellular phone system to send and receive signals
which are used with GPS receivers at the cellular towers to determine
location. So as long as you can send/receive cell phone calls you can
calculate where the child is located. No sky view is required, at least
that's the way I undetstand it works. I could be wrong about this as I
couldn't get specific information from the web sites as to how the GPS
location is actually derived.

TC


 
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