GPRS data service will not work over most of the UK at elevations above
about 2000' due to ground station antenna restrictions. I spent some time
talking to Virgin about using GPRS service whilst airborne and they had no
objections but using the phone still remained illegal. I have tested
reception of signal on 7 different phones in the air using sim cards from
different providers. Results vary widely. The best was with an old Nokia
6110 handset and BT / O2 simcard. I could make telephone calls from just
about anywhere. The latest phones are all but useless in the air most of the
time.

You'd be better off with a Ham packet radio solution ( APRS ) system.
http://www.ew.usna.edu/~bruninga/aprs.html
http://www.aprs.net/
http://www.aprs.co.uk/

Ian



"cernauta" wrote in message
...
"Mal" wrote:

Anyone seen this run or using it ?

http://www.vpos.no/demo.htm

Yes, seen in Elverum (WGC Club Class).
I believe that for the first time we have a real possibility to get
interest in a competition, while sitting on the ground.

The main differences compared to what I have seen till then a
. buffering the data in the transmitter, together with some delay in
the public display, allows for really continuos tracking
. mating the tracked data with a flight simulator alloes a really
impressive presentatio, as you will have seen in the sample movies on
the website.

bye

Aldo Cernezzi