Re: GPS Cellphone Tracking - Track Anyone Anytime Anywhere

In article <leciD9FGzJtGFAPe@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>, Bernard Hill <Bernard@xxxxxxxxxxxxxx> writes
In article <d8a9a60b4f.mrc7offline@xxxxxxxxxxxxxxxxxxxxxxxxx>, Mike Clark <mrc7@xxxxxxxxxxxxxxxx> writes
In message <+NvU3pAP9LsGFAkq@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>
Bernard Hill <Bernard@xxxxxxxxxxxxxx> wrote:

In article <1185386098.948254.250220@xxxxxxxxxxxxxxxxxxxxxxxxxxx>,
GpsSpying.Com <battlefield@xxxxxxxxxxx> writes
>GSM mobile phone tracking system via the GPS-TRACK satellite network.
>Based on repeater triangulation, the system tracks mobile phones using
>GPS and GSM technology. Track anyone, anyutime, anywhere using their
>cellphone number.
>
>http://www.GpsSpying.Com/
>

I am presuming that the phone constantly sends via GSM its GPS location.
So I presume it relies on the approval of the owner of the phone?


"Based on repeater triangulation" indicates that GPS is not necessary
for the service to work.

Hm. Bear in mind that a GPS received does not send any information (or am I wrong there?). So how does that work?

Some phones do have some GPS functionality built in but use the communication with the network to actually calculate the position of the handset. This is known as Assisted GPS and can lead to faster initial position fixes and better performance in poor GPS reception conditions. However it doesn't work at all when out of mobile coverage and the network provider may charge a fee for every position calculated or for the data volume to do so.

Seems to me that when the web site says "uses GSM" then it's sending *something*.


Certainly the police have used this method to track the path taken by
criminals and terrorists without requiring the approval of the criminal.

Making them wear a device where the sending of information cannot be turned off.

That is a form of tagging but mobile phone records (which base stations can 'see' the phone at any one time) can be used to work out roughly where the phone is. If a suspect has a phone when they are apprehended the police may apply to the phone networks for this data and it may be enough to confirm an alibi or to place the suspect (or their phone) in the vicinity of the crime at the time it was committed. Not strong enough evidence for a conviction but enough to add to a case.

--

Dominic Sexton
.

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