London Banter - View Single Post - Public internet access on the london underground

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On Mon, 12 Sep 2011 13:30:09 +0100
Roland Perry wrote:
In message , at 11:35:18 on Mon, 12 Sep
2011, d remarked:
to be UK and the other to be France. Similar issues apply to Microcells
on an aircraft, how high off the runway does it have to be in order to
start charging at roaming rates, rather than UK?)

Presumably the ones in aircraft communicate to ground via satellite so
how do they keep the dish aligned when in flight?

Fairly straightforward servo system. It works on trains with satellite
wifi.

Not that straightforward I wouldn't have thought. Trains don't suffer
turbulence or bank at 20 degrees. Keeping a lock on must be an interesting
problem.

B2003