Hi Bill,For the airport data:ICAO,Latitude,Longitude,Altitude in feet.For the weather station data:ICAO,Latitude,Longitude,Altitude in meters,magnetic declinationHope this helps,JimActiveSky Sales and Supporthttp://www.hifisim.com/images/asv_dev_team.jpg http://www.hifisim.com/images/asv_proud_supporter.jpg

Thanks Kyprianos. It seems that an entry of both LGAV and LGAT does the trick. I've tried the weather 4-5 times now and it's looking good!