View Single Post
  #34   Report Post  
Old September 12th 11, 12:30 PM posted to uk.transport.london,uk.telecom,uk.comp.mobile
Roland Perry Roland Perry is offline
external usenet poster
 
First recorded activity at LondonBanter: Aug 2003
Posts: 10,125
Default Public internet access on the london underground

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.
--
Roland Perry