Wrong Skystate and cloud cover

[Franck RONDOT]

Hello,

All work fine, but skystate always say "CLOUDY" and Cloud cover "100%"

What is the possible cause of this ?

Regards,
Franck

[brownrb]

I see ambient temp around 18 degrees
I see IR ambient at around 24 degrees
and I see IR red temperature at around 22 degrees
I see sqm around 5.8

So a stab in the dark quess - this was done during the day right?
Please the cloud model beginning page 209 of latest pdf.

The cloud model is for NIGHT-TIME - it is NOT calibrated for day usage. Here is a portion of Pauls guide to the Cloud model pg 209.

Start with slightly cloudy night sky. Just play around with them, see what the results are, and eventually you get there. I usually use multiples of 12 or 16 for the K values. K1 can also be negative. Best do it on a partly cloudy night, so you can get a match for the cloud percentage corresponding with the overcast.

READING MATERIAL
https://indiduino.wordpress.com/2013/02/02/meteostation/
http://lunatico.es/aagcw/TechInfo/SkyTemperatureModel.pdf
http://lunatico.es/aagcw/enhelp/

Cheers
Robert

[Franck RONDOT]

Hi Robert,
Thanks for your quick response !

Yes it's a daylight screenshot but this night i have a wrong result, but it's maybe a sensor glass probleme.
I will read the pdf cloud model !

Have a nice day,
Franck

[Franck RONDOT]

Hi Rovert,

After reading the document, I realize that I placed a glass in front of the IR sensor to protect the sensor from rain in a SQM+ 24/7 but it doesn't work!
I am working on another solution for the IR sensor.

Regards,
Franck