On Fri, Jan 29, 2010 at 1:36 PM, <pethier@comcast.net> wrote:
> ----- "Elton E. (Tony) Clark" <eltonclark@gmail.com> wrote:
>
> > *I have a little IR temperature meter which I use around the shop
> > checking
> > AC in and out temps, motor temps, etc . . one day I was outside
> > checking the
> > wall temp to see how my insulation was working, it was about 50
> > degrees
> > ambient and . . . I aimed the meter at the clear blue sky: It read
> > minus 15
> > degrees!!!!!! Is it really measuring something? Is that a
> > default?
> > HELP!!!!!*
> >
> > *Tony*
>
> What temperature do you think it is way up there?
>
>
Clear sky is cold! People have died of exposure from radiative cooling when
the air temperature is in the 60s. (Stupid people who think sleeping on a
hilltop would be a good idea, but still.)
that's why it gets *cold* in the winter when the night is clear.
--
David Scheidt
dmscheidt@gmail.com
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