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Last updated - Dernière modification 21/11/08 Mines ParisTech - Armines |
Assessment of the Uncertainty of the HelioClim-3 Database of Solar Radiation
The accuracy has been assessed by comparisons with measurements performed in several stations in Europe. The natural variability of the radiation should be removed from the values below (approx. 10-15 %) to evaluate the accuracy of the database. See articles.
BETA VERSION - List of stations used:
Number of samples:
| Mean value of ground data | Bias (HC - ground) | RMSE (root mean square error) | |
|---|---|---|---|
Hourly
Values |
297 Wh/m2 1069 kJ/m2 297 W/m2 |
-0.6 Wh/m2 (0.2 %) -2.2 kJ/m2 (0.2 %) -0.6 W/m2 (0.2 %) |
93 Wh/m2 (31 %) 335 kJ/m2 (31 %) 93 W/m2 (31 %) |
Daily
Values |
3792 Wh/m2 13649 kJ/m2 158 W/m2 |
22 Wh/m2 (0.6 %) 78 kJ/m2 (0.6 %) 0.9 W/m2 (0.6 %) |
552 Wh/m2 (15 %) 1987 kJ/m2 (15 %) 23 W/m2 (15 %) |
Examples of comparison: hourly values at Carpentras (France), a site in Greece, including comparison with HelioClim-2
| Carpentras (Meteo-France) Mean Value for Ground: 426.7 W/m2 Mean Value for HC-3: 427.7 W/m2 Bias: 1.0 W/m2 (0.2 %) RMS: 98.6 W/m2 (23 %) Correlation Coefficient: 0.9375 |
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