Guys, thanks for the suggestions. I might try the metal plate thing using an IR
temperature gun, and I'll pay close attention to the humidity on
Clear-Sky-Charts.
Paul
----- Original Message -----
From: Bernard Miller <bgmiller011@xxxxxxx>
To: az-observing@xxxxxxxxxxxxx
Sent: Wed, 18 Jan 2017 19:23:32 -0500 (EST)
Subject: [AZ-Observing] Re: Predicting Dew
Content-Type: text/plain;
charset="UTF-8"
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Paul,
=20
Clear-Sky-Chart includes a humidity row. Orange and red beware. Not a =
guarantee, but better safe than sorry.
=20
=20
Bernard
=20
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx =
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of Paul Lind
Sent: Wednesday, January 18, 2017 1:31 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Predicting Dew
=20
This morning I noticed large amount of dew on things in my yard, =
reminding me of observing sessions that were ruined by severe dew. I'm =
talking about puddles of water on my observing table and water dripping =
off my scope.
=20
So, my question is this: Is there a way to predict dewing from the =
Clear-Sky-Charts and other data, say, by comparing transparency, =
humidity, and temperature? The air-temperature/dewpoint relationship is =
not a good indicator of dewing because radiative cooling from a clear =
sky can cool objects well below both the air temperature and dewpoint. =
It's a good predictor of fog.
=20
Paul Lind
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