On Tue, 2013-04-16 at 09:56 +0200, Max Kellermann wrote: > On 2013/04/16 09:23, Hannu Niemi <hnpi...@phnet.fi> wrote: > > And in some countries (like Finland) it is forbidden to use GSM on air :( > > The FAI sporting code disallows GSM networking, too. > Probably just as well too, since in flat areas the telcos prefer to use as flat a radiation pattern from their towers as they can manage. Doing it that way reduces the transmitter power needed because they only need good signal strength at ground level: power used to provide coverage over the rest of the hemisphere is just wasted power.
Finland evidently gets better vertical coverage over towns than we do in the UK: I've been at 3000ft (920m) smack over the middle of Huntington and had no mobile signal at all. IMO it would be a very silly move for the IGC to authorise the use of a tracking system that can't operate up to the highest cloud base thats likely over competition areas anywhere in the world. As Max says, satellite tracking is the way to go. Martin ------------------------------------------------------------------------------ Precog is a next-generation analytics platform capable of advanced analytics on semi-structured data. The platform includes APIs for building apps and a phenomenal toolset for data science. Developers can use our toolset for easy data analysis & visualization. Get a free account! http://www2.precog.com/precogplatform/slashdotnewsletter _______________________________________________ Xcsoar-user mailing list Xcsoar-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/xcsoar-user
