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Negative and positive values of Solar radiation during night

asked 2016-01-06 11:57:49 -0500

Durr gravatar image

updated 2016-01-15 09:47:22 -0500

I have some actual weather data that contains global solar radiation values. I have noticed that it has positive and negative values at night time, please see below. Should it be zero during night time or I am missing something?

P.S: The unit is wrong for global solar radiation.

Weather_filw

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answered 2016-01-07 09:26:55 -0500

Archmage gravatar image

It probably should be zero but it is normal to have some small (depending on what the units really are) noise in the sensor reading. If this data were used in EnergyPlus it would be ignored when the sun's calculated position is not actually above the horizon.

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Asked: 2016-01-06 11:57:49 -0500

Seen: 909 times

Last updated: Jan 07 '16