Kippzonen BSRN Scientific Solar Monitoring System Instrukcja Użytkownika Pobierz pdf (Strona 135)

123

(4) Using the empirical formulae mentioned in (1) and (2) the diffuse radiation measured by a diffusometer

could be corrected to standard geometry.

(5) Since the circumsolar sky radiation has high variability and it is almost independent from other

radiation parameters, only the monthly (or at least several days) mean corrected diffuse radiation

values could be expected as reliable.

C 2.6 Acknowledgements

Thanks are due to those colleagues who provided the basic geom etrical data of their equipm ent, namely:

Klaus Dehne, John Hickey, Bruce Forgan, Ells Dutton and Ernst W essely.

C 2.7 References

Deirmendjian, D.: Theory of solar aureole. Annales de Geophysique. Part I: tom e 13,1997; Part II:

Tome 15, 1959.

Frohlich, C and Quenzel, H.: Influence of the sun’s aureole on the determination of turbidity. Special

Environmental Report No. 3, WMO-No. 368, 1974.

Major, G.: Estimation of the error caused by the circumsolar radiation when measuring global radiation

as a sum of direct and diffuse radiation. Solar Energy, 48, No.4, 1992.

Major G.: Circumsolar correction for pyrheliometers and diffusometers. WCRP, WMO/TD-No.635,

1994.

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

Noring, J.E., Grether, D.F. and Hunt, A.J.: Circumsolar radiation data: The Lawrence Berkeley Laboratory

Reduced Data Base, NREL/TP-262-4429, 1991.

Putsay, M.: Circumsolar radiation calculated for various aerosol models. Idojaras, 99, No.2, 1995.

Thomalla, E., Kopke, P., Muller, H. and Quenzel, H.: Circumsolar radiation calculated for various

atmospheric conditions. Solar Energy 30, 575-587, 1983.

1 2 ... 130 131 132 133 134 135 136 137 138 139 140 ... 187 188

Kippzonen BSRN Scientific Solar Monitoring System Instrukcja Użytkownika Strona 135