Kippzonen BSRN Scientific Solar Monitoring System Manuel d'utilisateur télécharger pdf (Page 151)

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Figure D 1.4. The contribution of the circumsolar sky to the irradiance of

pyrheliometric sensors. The upper 3 curves belong to the case of continental

background aerosol and 20 degrees solar elevation, the lower 3 curves belong to

the case of mountain aerosol and 60 degrees solar elevation. In both group of

curves the instruments are from the top to down: NIP, KIPP and ABS.

Figure D 1.3. Same as Fig. D 1.2 except the case is for continental background

aerosol and 20 degrees solar elevation.

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Kippzonen BSRN Scientific Solar Monitoring System Manuel d'utilisateur Page 151