For Liars and Loafers, Cellphones Offer an Alibi


Tue Dec 10 11:45:29 PST 2019


Hi,
Major Variola (ret) (mv at cdc.gov) wrote on 2004-06-27:
> At 11:53 PM 6/26/04 -0500, J.A. Terranson wrote:
> >not to overpower the wanted signals on something like this.  Even if this
> >is doable, it is out of reach of Jane Citizen.
> 
> Any signal you put out is trackable to you geographically, whether its
> a cell or GPS frequency.

A GPS receiver doesn't broadcast its location. GPS works purely by
analyzing the signals received from satellites. This is probably a design
goal for military use, as well as a consequence of power requirements.

There is no such thing as a GPS frequency. It seems that for CDMA or
WCDMA phones the location service is defined in terms of messages on the
normal network layer, see a Google search for "position determination service
order".
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