Kippzonen BSRN Scientific Solar Monitoring System Manuel d'utilisateur télécharger pdf (Page 49)

Pyranometer Radius of

shading

disk/sphere

Arm length

required for

Eppley HF

Arm length

required for

Eppley NIP

Arm length

required for

Kipp and

Zonen CH1

Eppley PSP 25.4 635 605 510

Eppley 8-48 30 726 703 574

Kipp and Zonen

CM11 or CM21

25.4 630 603 505

Schenk Star 34 840 815 668

Table 4.1. Optimized shade geometry for common instruments. The optimization considers solar

aureole conditions, solar elevation and instrument characteristics (courtesy of G. Major and M.

Putsay)

Figure 4.5. Australian active tracker used for both diffuse

and direct beam measurements. This tracker is shading

a single pyranometer, and pointing two normal incidence

pyrheliometers and a GAW PFR sunphotometer on one

side of the tracker and another pyrheliometer on the far

side of the tracker. An active-eye is also situated on the

far side of the tracker. (Courtesy Bureau of Meteorology,

Australia)

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Kippzonen BSRN Scientific Solar Monitoring System Manuel d'utilisateur Page 49