HelioClim-3 Similarity Forecast - Validation results

Last update: June 2018

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Validation results for the Global Horizontal Irradiation values and for different time steps (monthly, daily, hourly and 15 min data). To produce these results, the HelioClim-3 version 4 Solar Similarity Forecast data at D+1 have been compared to the BSRN stations

More information on the BSRN stations.
More information about the validation protocol and the quality check procedure.

Quality assessment results of GHI values

HelioClim-3 v4 Solar Similarity Forecast service -- GHI Quality assessment results vs. the BSRN stations
MONTHLY SUM OF 15 MIN IRRADIATION
Station Number of values Mean
- BSRN -
(kWh/m2)
Bias HC3v4
(kWh/m2)
(relative in %
)
Bias Forecast
(kWh/m2)
(relative in %
)
RMSE HC3v4
(kWh/m2)
(relative in %
)
RMSE Forecast
(kWh/m2)
(relative in %
)
Correl. coeff.
HC3v4
Correl. coeff.
Forecast
Toravere 50 86.9 -2.8 (-3.2%) -2.4 (-2.8%) 8.3 (9.6%) 11.1 (12.8%) 0.987 0.974
Cabauw 65 88.2 -3.1 (-3.5%) -3.7 (-4.2%) 7.3 (8.3%) 12.0 (13.6%) 0.994 0.980
Palaiseau 54 103.7 3.5 (3.4%) 2.6 (2.5%) 6.0 (5.8%) 11.9 (11.5%) 0.998 0.981
Payerne 29 107.8 -8.5 (-7.8%) -11.0 (-10.2%) 10.1 (9.4%) 16.2 (15.0%) 0.996 0.985
Carpentras 61 130.0 1.3 (1.0%) -0.4 (-0.3%) 3.8 (2.9%) 9.2 (7.1%) 0.999 0.990
Sede Boqer 44 166.9 -11.7 (-7.0%) -12.9 (-7.8%) 13.9 (8.3%) 14.2 (8.5%) 0.992 0.995
Tamanrasset 65 159.9 0.1 (0.1%) 0.2 (0.1%) 8.1 (5.1%) 10.6 (6.6%) 0.973 0.953
Brasilia 27 144.8 5.7 (4.0%) 8.5 (5.8%) 7.7 (5.3%) 12.6 (8.7%) 0.989 0.958
Sao Martinho da Serra 32 141.2 -1.9 (-1.3%) -3.5 (-2.5%) 4.2 (3.0%) 10.9 (7.8%) 0.997 0.978

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HelioClim-3 v4 Solar Similarity Forecast service -- GHI Quality assessment results vs. the BSRN stations
DAILY SUM OF 15 MIN IRRADIATION
Station Number of values Mean
- BSRN -
(Wh/m2)
Bias HC3v4
(Wh/m2)
(relative in %
)
Bias Forecast
(Wh/m2)
(relative in %
)
RMSE HC3v4
(Wh/m2)
(relative in %
)
RMSE Forecast
(Wh/m2)
(relative in %
)
Correl. coeff.
HC3v4
Correl. coeff.
Forecast
Toravere 1481 2795.3 -82.1 (-2.9%) -56.4 (-2.0%) 445.3 (15.9%) 1140.4 (40.8%) 0.978 0.843
Cabauw 1946 2940.1 -103.6 (-3.5%) -123.1 (-4.2%) 378.1 (12.9%) 1106.9 (37.6%) 0.987 0.868
Palaiseau 1639 3412.4 114.2 (3.3%) 101.1 (3.0%) 332.4 (9.7%) 1144.7 (33.5%) 0.991 0.867
Payerne 877 3558.8 -278.9 (-7.8%) -360.5 (-10.1%) 467.7 (13.1%) 1263.8 (35.5%) 0.987 0.862
Carpentras 1824 4359.2 43.5 (1.0%) -14.4 (-0.3%) 319.3 (7.3%) 1168.1 (26.8%) 0.992 0.881
Sede Boqer 1287 5647.8 -398.2 (-7.1%) -418.3 (-7.4%) 553.4 (9.8%) 741.6 (13.1%) 0.981 0.949
Tamanrasset 1723 5624.6 6.3 (0.1%) 25.3 (0.4%) 566.3 (10.1%) 902.5 (16.0%) 0.908 0.762
Brasilia 761 5073.7 194.7 (3.8%) 306.4 (6.0%) 583.5 (11.5%) 1046.0 (20.6%) 0.911 0.662
Sao Martinho da Serra 970 4721.2 -67.2 (-1.4%) -148.5 (-3.1%) 405.3 (8.6%) 1742.7 (36.9%) 0.986 0.672

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HelioClim-3 v4 Solar Similarity Forecast service -- GHI Quality assessment results vs. the BSRN stations
HOURLY SUM OF 15 MIN IRRADIATION
Station Number of values Mean
- BSRN -
(Wh/m2)
Bias HC3v4
(Wh/m2)
(relative in %
)
Bias Forecast
(Wh/m2)
(relative in %
)
RMSE HC3v4
(Wh/m2)
(relative in %
)
RMSE Forecast
(Wh/m2)
(relative in %
)
Correl. coeff.
HC3v4
Correl. coeff.
Forecast
Toravere 18095 221.9 -6.0 (-2.7%) -3.3 (-1.5%) 60.3 (27.2%) 126.5 (57.0%) 0.958 0.800
Cabauw 22886 249.6 -9.0 (-3.6%) -10.8 (-4.3%) 56.7 (22.7%) 126.9 (50.8%) 0.968 0.821
Palaiseau 19680 285.1 9.3 (3.3%) 6.6 (2.3%) 51.4 (18.0%) 134.1 (47.1%) 0.978 0.830
Payerne 10167 306.7 -24.3 (-7.9%) -31.6 (-10.3%) 67.3 (22.0%) 144.3 (47.1%) 0.970 0.839
Carpentras 21959 362.3 3.5 (1.0%) -1.9 (-0.5%) 47.2 (13.0%) 133.7 (36.9%) 0.986 0.878
Sede Boqer 14417 505.6 -35.3 (-7.0%) -39.0 (-7.7%) 69.2 (13.7%) 98.0 (19.4%) 0.982 0.957
Tamanrasset 20996 479.2 0.7 (0.1%) 0.4 (0.1%) 71.7 (15.0%) 120.6 (25.2%) 0.974 0.926
Brasilia 9428 417.1 16.4 (3.9%) 24.2 (5.8%) 110.4 (26.5%) 154.2 (37.0%) 0.933 0.860
Sao Martinho da Serra 11567 396.3 -5.8 (-1.5%) -13.0 (-3.3%) 73.3 (18.5%) 190.6 (48.1%) 0.971 0.787

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HelioClim-3 v4 Solar Similarity Forecast service -- GHI Quality assessment results vs. the BSRN stations
15 MIN IRRADIATION
Station Number of values Mean
- BSRN -
(Wh/m2)
Bias HC3v4
(Wh/m2)
(relative in %
)
Bias Forecast
(Wh/m2)
(relative in %
)
RMSE HC3v4
(Wh/m2)
(relative in %
)
RMSE Forecast
(Wh/m2)
(relative in %
)
Correl. coeff.
HC3v4
Correl. coeff.
Forecast
Toravere 71550 61.6 -2.0 (-3.2%) -1.7 (-2.8%) 20.4 (33.2%) 36.0 (58.5%) 0.935 0.779
Cabauw 88643 64.7 -2.3 (-3.5%) -2.7 (-4.2%) 19.0 (29.4%) 35.3 (54.6%) 0.944 0.787
Palaiseau 76660 73.4 2.4 (3.3%) 1.8 (2.5%) 18.1 (24.7%) 37.5 (51.1%) 0.957 0.795
Payerne 39758 78.6 -6.2 (-7.8%) -8.0 (-10.2%) 21.3 (27.1%) 39.2 (49.9%) 0.951 0.814
Carpentras 84383 94.4 1.0 (1.0%) -0.4 (-0.4%) 15.6 (16.5%) 36.2 (38.3%) 0.975 0.856
Sede Boqer 56695 130.7 -9.2 (-7.0%) -10.1 (-7.7%) 20.7 (15.8%) 27.2 (20.8%) 0.970 0.943
Tamanrasset 80956 128.4 0.1 (0.1%) 0.1 (0.1%) 23.0 (17.9%) 34.8 (27.1%) 0.958 0.903
Brasilia 36273 110.2 4.6 (4.2%) 6.7 (6.0%) 37.1 (33.7%) 45.7 (41.5%) 0.881 0.807
Sao Martinho da Serra 44186 104.3 -1.4 (-1.4%) -3.2 (-3.1%) 24.7 (23.7%) 51.9 (49.8%) 0.949 0.749

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