Which result data should I compare with pyranometer?

[Rafał]

Hello,
I need support in indicating which irradiance value is correct for comparison with the value read by pyranometers.
I have doubts between GlobInc, GlobShd and GlobEff.
Pyranometers are installed as in the photo.

Please suggest and help.

Thanks

Rafał

Edited May 13 by Rafał

[dtarin]

GlobInc. You might have reflections at low sun angles with that installation. For a fixed tilt system, these can be installed on a weather station free from shading and reflection. 

Edited May 13 by dtarin

[Rafał]

Hi dtarin,

Thanks for your answer.

If I assume the GlobInc parameter, will the comparison be underestimated due to the fact that the pyranometers are installed in the central part of the farm? I shouldn't include shading, i.e. GlobShd or GlobEff?

Rafał

Edited May 14 by Rafał