per request
-------- Forwarded Message --------
Subject: Re: [weewx-user] Fog detection?
Date: Tue, 31 Aug 2021 15:26:46 -0500
From: VE4PER / Andy <[email protected]>
To: Greg Troxel <[email protected]>
I think the sensor is referred to as transmissometer; usually in pro
unattended observer stations that is used and also a similar ceilometer
for cloud heights
On 2021-08-31 3:19 p.m., Greg Troxel wrote:
František Slimařík <[email protected]> writes:
I got question for hardcore meteorologists here. Is it possible to detect
fog based on classic meassured values like temperature, humidity,
preasure,
etc?
Logically I would say fog appears when dew point equals current
temeperature but I guess it will not be so easy. Fogs didn't appear here
this year in my locality so I am waiting for autumn to start with
observations.
Good question, but my impression is that it is really difficult to
measure humidity above 95%. I more or less have the impression that
fog happens when temp/dewpoint are about the same and the temperature
falls.
I think you need a fog sensor that actually measures impaired light
transmission. Surely there is a norm for measuring that already. I
need one too, right after I build a seismograph.
--
You received this message because you are subscribed to the Google Groups
"weewx-user" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to [email protected].
To view this discussion on the web visit
https://groups.google.com/d/msgid/weewx-user/20fd4e10-0950-238c-5319-a488123f7618%40gmail.com.
