----- Original Message ----- From: Anthony Farr Subject: Re: Aerial photography question
> Watch the weather reports for mountains in your area. The temperature at > altitude will be closer to mountain temps than ground temps. I recall > turning up to a job at a town at 1000m ALT where the temperature was > pleasantly warm. However snow was forecast for 1500m and above, so I > carried my ski parka with me, to the mirth of my associates. Ten minutes > later I could have sold that parka for almost any sum I could name, but then > I'd be freezing my own arse off :-) Good advice. Chris lives on the praries, but temperature drops off at altitude here too. Part of balloon training is what is called terminal decents. What we do is go to about 10,000 MSL and shut the burner down. The balloon will drop, pretty much like a stone. Anyway, when we did ours, it was 14�C at ground level (here, that is 1900MSL), but at 10,000 it was about -10�. We were not dressed for it. William Robb
