Thread: GPS In Emergency Even If GPS Is Disabled?
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rambo is offline rambo
2010-03-25 , 07:29
Posts: 540 | Thanked: 288 times | Joined on Sep 2009
#20
Originally Posted by Renkon View Post
This area will be bigger with only two BS (not necessary, but likely).
However, this whole thing seems strange to me, as you may be in a parking lot, with bad network connection at all, and the BS triangulation will yield to false values?
They will definitely have approximate direction (the antennas are organized in such way that channels should not overlap between towers), but it's not the signal strength used for triangulation but clock delta (==signal travel time == distance).

Probably with a bit of planning it's possible that the antennas are organized in such way that for most cases there is only one possible location that is in correct approx direction and exact distances from both towers.

Again, this is basically only available to the network operators (and other parties that have the ability to inject arbitary requests into the network [think law-enforcement tap points]).