Originally Posted by
Loren Pechtel
It won't work. You're much too far away from the transmitters.
Someday someone will make one that uses the GPS signals rather than the clock broadcasts but I haven't seen one like that and it would almost certainly have to be a plug-in clock, not battery operated. GPS also has the problem that it doesn't penetrate buildings very well.
Usually the GPS signals are too weak for indoor use.
There are network time server (devices) that can sync time with the
GPS signals, but they need direct line of sight with the satellites.
Most of these units have roof top mounted antennas to make this
work right.