Kippzonen BSRN Scientific Solar Monitoring System Manuel d'utilisateur télécharger pdf (Page 140)

128

Pyranometer Radius of shading

disk/sphere

Arm length

to fit to HF

Arm length

to fit to CH-1

Arm length

to fit to NIP

CM 11 or 21 25.4 630 603 505

EPPLEY PSP 25.4 635 605 510

EPPLEY 8-48 30 726 703 574

SCHENK Star 34 840 815 668

Table C 3.6. Optimal geometric parameters (mm) of diffusometer for the considered

pyranometer- pyrheliometer pairs.

C 3.3 References

Major, G. 1992: Estimation of the Error Caused by the Circumsolar Radiation when Measuring Global

Radiation as a sum of Direct and Diffuse Radiation. Solar Energy, 48.

Major, G. 1994: Circumsolar Correction for Pyrheliometers and Diffusometers. WMO/TD-No. 635

Major, G. 1995: The role of geometry in the comparison of standard Pyrheliometers. Idojaras, 99, No. 2.

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Kippzonen BSRN Scientific Solar Monitoring System Manuel d'utilisateur Page 140