Kippzonen CM 121 B/C Shadow Ring Bedienungsanleitung PDF herunterladen (Seite 22)

5. MEASUREMENT OF THE DIFFUSE SKY RADIATION

Instruction manual CM 121

5.3 Diffuse sky radiation on a tilted plane

The correction factors are only valid for a pyranometer in the horizontal position.

However, for a pyranometer tilted T degrees to the south and on latitude B, the configuration of ring

and pyranometer is the same as for a horizontal pyranometer at latitude (B - T) degrees.

You can derive a list of correction factors for a tilted pyranometer from table 1 in 5.2, taking into

account that only part of the hemisphere is 'seen' by the pyranometer. However, this correction

does not take the effect of ground-reflected radiation into account. The correction for this is very

much dependant on local conditions and might vary throughout the day as a function of the solar

position, and throughout the year as a function of ground properties. Therefore this is the responsi-

bility of the customer.

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Kippzonen CM 121 B/C Shadow Ring Bedienungsanleitung Seite 22