Previous Validation CAMS Radiation Service - EnerMENA

Validation CAMS Radiation Service - EnerMENA stations

 

Statistics of previous version 3.2

Validation of CAMS Radiation
​​​​​​​(2015 - 2018) against the measurements of 10 EnerMENA stations

 

Date of the validation: May 2019
CAMS Radiation version: 3.2 (obsolete)
Network: EnerMENA. More info about EnerMENA project.
Number of stations: 10 (see Table 1), located in North of Africa and Middle East.
Original time step and radiation components: 1 min GHI and DNI
Author: Laurent Saboret, TRANSVALOR
Publication: about the EnerMENA stations Schüler et al. 2016

Illustration: list of the EnerMENA stations used for the validation =>

         

EnerMENA stations used in this validation

Table 1: in decreasing latitudes. "TS" stands for Thermal Sensors and "RSI" for Rotating Shadowband Irradiometer sensors.

Station Country Station Type Latitude (°) Longitude (°) Altitude (m) Period Climate
Oujda Morocco TS 34.650 -1.900 617 2015-01-06 to 2018-10-02 Mediterranean
Tataouine Tunisia TS 32.974 10.485 210 2014-12-31 to 2017-09-15 Desertic
Missour Morocco TS 32.860 -4.107 1107 2015-01-01 to 2018-09-20 Desertic - Montaneous
Ghardaia Algeria TS 32.386 3.780 463 2014-12-31 to 2016-04-01 Desertic
Erfoud Morocco RSI 31.491 -4.218 859 2015-01-24 to 2018-10-02 Desertic
Zagora Morocco RSI 30.272 -5.852 783 2015-01-01 to 2018-10-01 Desertic
Ma'an Jordan TS 30.172 35.818 1012 2014-12-31 to 2018-01-22 Desertic
Cairo Egypt TS 30.036 31.009 104 2014-12-31 to 2018-09-14 Desertic - Mediterranean
Tan-Tan Morocco TS 28.498 -11.322 75 2015-01-01 to 2016-12-02 Desertic - Oceanic
Adrar Algeria TS 27.878 -0.270 262 2014-12-31 to 2018-03-29 Desertic

 

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Interpretation of results

Most sites are located in desertic areas, in which an underestimation of the radiation is observed. The exception is the site of Tan-Tan, located close to the sea shore.

GHI and DNI CAMS Radiation validation results - monthly, daily, hourly and 15 min sampling rates

(Click on the following link to show the corresponding statistics)

Monthly GHI

CAMS-Radiation -- GHI Quality assessment results vs. the stations
MONTHLY IRRADIATION
Station Number of values Mean
station
(kWh/m2)		 Bias
(kWh/m2)
(relative in %)		 STDEV
(kWh/m2)
(relative in %)		 RMSE
(kWh/m2)
(relative in %)		 Correl. coeff.
Tataouine 31 168.58 -11.01 (-6.53%) 5.19 (3.08%) 12.17 (7.22%) 0.996
Ma'an 30 181.51 -8.86 (-4.88%) 3.00 (1.65%) 9.35 (5.15%) 0.999
Oujda 44 157.01 -3.32 (-2.12%) 5.40 (3.44%) 6.34 (4.04%) 0.996
Cairo 44 162.03 -4.37 (-2.70%) 5.30 (3.27%) 6.87 (4.24%) 0.995
Adrar 24 182.23 -17.69 (-9.71%) 7.73 (4.24%) 19.30 (10.59%) 0.989
Ghardaia 15 156.03 -15.78 (-10.11%) 7.95 (5.09%) 17.66 (11.32%) 0.991
Missour 33 150.51 -11.54 (-7.66%) 4.17 (2.77%) 12.27 (8.15%) 0.998
Erfoud 44 168.33 -4.73 (-2.81%) 4.82 (2.86%) 6.75 (4.01%) 0.996
Zagora 44 182.99 -9.99 (-5.46%) 6.76 (3.69%) 12.06 (6.59%) 0.989
Tan-Tan 16 137.43 1.52 (1.10%) 7.44 (5.42%) 7.60 (5.53%) 0.974

Daily GHI

CAMS-Radiation -- GHI Quality assessment results vs. the stations
DAILY IRRADIATION
Station Number of values Mean
station
(Wh/m2)		 Bias
(Wh/m2)
(relative in %)		 STDEV
(Wh/m2)
(relative in %)		 RMSE
(Wh/m2)
(relative in %)		 Correl. coeff.
Tataouine 906 5729.94 -371.21 (-6.48%) 437.11 (7.63%) 573.46 (10.01%) 0.977
Ma'an 886 6287.53 -308.08 (-4.90%) 302.13 (4.81%) 431.50 (6.86%) 0.988
Oujda 1294 5312.51 -111.74 (-2.10%) 427.74 (8.05%) 442.09 (8.32%) 0.981
Cairo 1245 5755.98 -151.89 (-2.64%) 390.03 (6.78%) 418.57 (7.27%) 0.979
Adrar 725 6169.53 -590.06 (-9.56%) 500.96 (8.12%) 774.03 (12.55%) 0.953
Ghardaia 410 5653.91 -572.80 (-10.13%) 492.50 (8.71%) 755.42 (13.36%) 0.964
Missour 938 5523.54 -422.32 (-7.65%) 458.96 (8.31%) 623.70 (11.29%) 0.973
Erfoud 1266 5836.64 -162.18 (-2.78%) 377.40 (6.47%) 410.77 (7.04%) 0.973
Zagora 1295 6220.66 -338.06 (-5.43%) 432.84 (6.96%) 549.21 (8.83%) 0.966
Tan-Tan 477 5050.15 102.69 (2.03%) 736.16 (14.58%) 743.29 (14.72%) 0.894

Hourly GHI

CAMS-Radiation -- GHI Quality assessment results vs. the stations
HOURLY IRRADIATION
Station Number of values Mean
station
(Wh/m2)		 Bias
(Wh/m2)
(relative in %)		 STDEV
(Wh/m2)
(relative in %)		 RMSE
(Wh/m2)
(relative in %)		 Correl. coeff.
Tataouine 11372 459.94 -29.94 (-6.51%) 61.22 (13.31%) 68.15 (14.82%) 0.980
Ma'an 11207 502.38 -24.79 (-4.93%) 45.55 (9.07%) 51.86 (10.32%) 0.990
Oujda 15765 438.48 -9.47 (-2.16%) 64.90 (14.80%) 65.59 (14.96%) 0.977
Cairo 14647 487.84 -12.77 (-2.62%) 53.26 (10.92%) 54.77 (11.23%) 0.985
Adrar 8986 497.73 -47.60 (-9.56%) 59.93 (12.04%) 76.54 (15.38%) 0.983
Ghardaia 4941 471.00 -47.64 (-10.12%) 62.97 (13.37%) 78.96 (16.76%) 0.979
Missour 11349 462.26 -35.48 (-7.67%) 79.52 (17.20%) 87.08 (18.84%) 0.968
Erfoud 15126 487.66 -13.62 (-2.79%) 58.71 (12.04%) 60.27 (12.36%) 0.981
Zagora 16410 492.77 -26.89 (-5.46%) 59.88 (12.15%) 65.64 (13.32%) 0.982
Tan-Tan 5815 425.26 8.87 (2.08%) 88.50 (20.81%) 88.94 (20.91%) 0.954

15 min GHI

CAMS-Radiation -- GHI Quality assessment results vs. the stations
15 MIN IRRADIATION
Station Number of values Mean
station
(Wh/m2)		 Bias
(Wh/m2)
(relative in %)		 STDEV
(Wh/m2)
(relative in %)		 RMSE
(Wh/m2)
(relative in %)		 Correl. coeff.
Tataouine 43044 121.74 -7.93 (-6.51%) 19.00 (15.61%) 20.59 (16.91%) 0.968
Ma'an 42289 133.62 -6.60 (-4.94%) 14.53 (10.87%) 15.96 (11.94%) 0.983
Oujda 60704 114.16 -2.42 (-2.12%) 20.96 (18.36%) 21.10 (18.49%) 0.961
Cairo 56939 126.68 -3.34 (-2.64%) 17.07 (13.48%) 17.39 (13.73%) 0.975
Adrar 34175 131.42 -12.58 (-9.57%) 17.48 (13.30%) 21.54 (16.39%) 0.974
Ghardaia 18907 123.78 -12.52 (-10.11%) 18.55 (14.99%) 22.38 (18.08%) 0.969
Missour 43427 121.58 -9.32 (-7.67%) 24.98 (20.54%) 26.66 (21.93%) 0.949
Erfoud 58195 127.27 -3.57 (-2.81%) 19.16 (15.05%) 19.49 (15.31%) 0.966
Zagora 61751 131.14 -7.15 (-5.46%) 19.55 (14.91%) 20.82 (15.88%) 0.968
Tan-Tan 22437 110.79 2.36 (2.13%) 25.52 (23.03%) 25.62 (23.13%) 0.939

Monthly DNI

CAMS-Radiation -- DNI Quality assessment results vs. the stations
MONTHLY IRRADIATION
Station Number of values Mean
station
(kWh/m2)		 Bias
(kWh/m2)
(relative in %)		 STDEV
(kWh/m2)
(relative in %)		 RMSE
(kWh/m2)
(relative in %)		 Correl. coeff.
Tataouine 31 179.29 -23.65 (-13.19%) 19.08 (10.64%) 30.39 (16.95%) 0.921
Ma'an 30 216.77 -24.06 (-11.10%) 10.34 (4.77%) 26.19 (12.08%) 0.980
Oujda 44 170.84 -7.09 (-4.15%) 8.23 (4.82%) 10.86 (6.36%) 0.974
Cairo 43 158.01 5.15 (3.26%) 14.28 (9.04%) 15.18 (9.61%) 0.954
Adrar 21 180.19 -27.48 (-15.25%) 16.73 (9.28%) 32.17 (17.86%) 0.855
Ghardaia 15 177.40 -35.52 (-20.02%) 16.51 (9.30%) 39.17 (22.08%) 0.927
Missour 31 175.14 -23.92 (-13.66%) 15.00 (8.57%) 28.24 (16.12%) 0.900
Erfoud 33 195.66 -11.32 (-5.78%) 14.51 (7.41%) 18.40 (9.40%) 0.901
Zagora 44 204.45 -18.06 (-8.83%) 18.45 (9.02%) 25.82 (12.63%) 0.913
Tan-Tan 11 134.95 7.25 (5.37%) 14.50 (10.75%) 16.21 (12.01%) 0.873

Daily DNI

CAMS-Radiation -- DNI Quality assessment results vs. the stations
DAILY IRRADIATION
Station Number of values Mean
station
(Wh/m2)		 Bias
(Wh/m2)
(relative in %)		 STDEV
(Wh/m2)
(relative in %)		 RMSE
(Wh/m2)
(relative in %)		 Correl. coeff.
Tataouine 826 6607.35 -880.29 (-13.32%) 1224.20 (18.53%) 1507.84 (22.82%) 0.866
Ma'an 850 7764.08 -852.41 (-10.98%) 834.10 (10.74%) 1192.61 (15.36%) 0.936
Oujda 1099 6602.19 -292.59 (-4.43%) 844.85 (12.80%) 894.09 (13.54%) 0.931
Cairo 1184 5777.61 188.16 (3.26%) 1061.29 (18.37%) 1077.84 (18.66%) 0.860
Adrar 585 6411.86 -988.40 (-15.42%) 1452.48 (22.65%) 1756.88 (27.40%) 0.791
Ghardaia 382 6787.80 -1346.93 (-19.84%) 1143.75 (16.85%) 1767.03 (26.03%) 0.853
Missour 808 6991.37 -970.92 (-13.89%) 1069.33 (15.29%) 1444.35 (20.66%) 0.881
Erfoud 1199 6755.98 -366.71 (-5.43%) 1012.70 (14.99%) 1077.05 (15.94%) 0.892
Zagora 1237 7241.83 -649.44 (-8.97%) 1202.67 (16.61%) 1366.81 (18.87%) 0.879
Tan-Tan 322 5657.47 356.40 (6.30%) 1257.35 (22.22%) 1306.88 (23.10%) 0.799

Hourly DNI

CAMS-Radiation -- DNI Quality assessment results vs. the stations
HOURLY IRRADIATION
Station Number of values Mean
station
(Wh/m2)		 Bias
(Wh/m2)
(relative in %)		 STDEV
(Wh/m2)
(relative in %)		 RMSE
(Wh/m2)
(relative in %)		 Correl. coeff.
Tataouine 10079 550.30 -74.00 (-13.45%) 159.00 (28.89%) 175.38 (31.87%) 0.854
Ma'an 10724 625.91 -69.56 (-11.11%) 113.78 (18.18%) 133.36 (21.31%) 0.932
Oujda 13396 558.13 -24.90 (-4.46%) 125.34 (22.46%) 127.79 (22.90%) 0.909
Cairo 13417 509.93 15.61 (3.06%) 137.80 (27.02%) 138.68 (27.20%) 0.869
Adrar 7021 536.94 -82.33 (-15.33%) 162.11 (30.19%) 181.82 (33.86%) 0.840
Ghardaia 4526 582.65 -117.22 (-20.12%) 164.77 (28.28%) 202.22 (34.71%) 0.843
Missour 9641 612.52 -87.10 (-14.22%) 167.38 (27.33%) 188.69 (30.80%) 0.857
Erfoud 13737 591.91 -32.27 (-5.45%) 128.96 (21.79%) 132.93 (22.46%) 0.903
Zagora 14863 608.20 -55.27 (-9.09%) 142.57 (23.44%) 152.91 (25.14%) 0.895
Tan-Tan 4092 489.23 54.74 (11.19%) 193.15 (39.48%) 200.76 (41.04%) 0.797

15 min DNI

CAMS-Radiation -- DNI Quality assessment results vs. the stations
15 MIN IRRADIATION
Station Number of values Mean
station
(Wh/m2)		 Bias
(Wh/m2)
(relative in %)		 STDEV
(Wh/m2)
(relative in %)		 RMSE
(Wh/m2)
(relative in %)		 Correl. coeff.
Tataouine 38936 142.99 -18.83 (-13.17%) 45.94 (32.13%) 49.65 (34.72%) 0.801
Ma'an 40821 165.14 -18.33 (-11.10%) 34.04 (20.61%) 38.66 (23.41%) 0.892
Oujda 52723 142.89 -5.87 (-4.11%) 39.16 (27.41%) 39.60 (27.72%) 0.859
Cairo 53227 130.38 4.16 (3.19%) 39.81 (30.54%) 40.03 (30.70%) 0.829
Adrar 27463 137.79 -20.90 (-15.17%) 44.11 (32.01%) 48.81 (35.43%) 0.809
Ghardaia 17641 150.84 -30.20 (-20.02%) 46.24 (30.65%) 55.23 (36.61%) 0.800
Missour 37902 157.79 -22.17 (-14.05%) 50.50 (32.00%) 55.15 (34.95%) 0.795
Erfoud 53920 152.24 -8.18 (-5.37%) 38.81 (25.49%) 39.66 (26.05%) 0.856
Zagora 57388 158.24 -14.13 (-8.93%) 41.64 (26.32%) 43.98 (27.79%) 0.849
Tan-Tan 16367 123.62 16.02 (12.96%) 56.45 (45.67%) 58.68 (47.47%) 0.738

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