spacer satellite images metars and tafs ideal weather sea breezes "overdevelopment" webcam demo soundings general wave -Bradbury rule DIY s'dings NOAA f'cst soundings Ready spacer useful links More Advice HG & PG Pilots' websites spacforecasting hints (Haby)er PG comps Chiltern Flyers Phil Swallowr task calculator HG comps Mike Rubin Steve Kirkby glider handicaps HG league Guy Roberts spacer