Validation of the surface downwelling solar irradiance estimates of the HelioClim-3 database in Egypt - Mines Paris Accéder directement au contenu
Article Dans Une Revue Remote Sensing Année : 2015

Validation of the surface downwelling solar irradiance estimates of the HelioClim-3 database in Egypt

Résumé

HelioClim-3 (HC3) is a database providing time series of the surface downwelling solar irradiance that are computed from images of the Meteosat satellites. This paper presents the validation results of the hourly global horizontal irradiance (GHI) and direct normal irradiance (DNI), i.e., beam irradiance at normal incidence, of versions four and five of HC3 at seven Egyptian sites. The validation is performed for all-sky conditions, as well as cloud-free conditions. Both versions of HC3 provide similar OPEN ACCESS Remote Sens. 2015, 7 9270 performances whatever the conditions. Another comparison is made with the estimates provided by the McClear database that is restricted to cloud-free conditions. All databases capture well the temporal variability of the GHI in all conditions, McClear being superior for cloud-free cases. In cloud-free conditions for the GHI, the relative root mean square error (RMSE) are fairly similar, ranging from 6% to 15%; both HC3 databases exhibit a smaller bias than McClear. McClear offers an overall better performance for the cloud-free DNI estimates. For all-sky conditions, the relative RMSE for GHI ranges from 10% to 22%, except one station, while, for the DNI, the results are not so good for the two stations with DNI measurements.
Fichier principal
Vignette du fichier
2015_rem_sen_hc3_egypt_eissa.pdf (748.93 Ko) Télécharger le fichier
Origine : Publication financée par une institution
Loading...

Dates et versions

hal-01180379 , version 1 (26-07-2015)

Identifiants

Citer

Yehia Eissa, Mohamed Korany, Youva Aoun, Mohamed Boraiy, Magdy Abdel Wahab, et al.. Validation of the surface downwelling solar irradiance estimates of the HelioClim-3 database in Egypt. Remote Sensing, 2015, 7, pp.9269-9291. ⟨10.3390/rs70709269⟩. ⟨hal-01180379⟩
373 Consultations
345 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More