@article{fdi:010064811,
  title = {{O}ptimizing the {H}eliosat-{II} method for surface solar irradiation estimation with {GOES} {I}mages},
  author = {{A}lbarelo, {T}. and {M}arie-{J}oseph, {I}. and {P}rimerose, {A}. and {S}eyler, {F}r{\'e}d{\'e}rique and {W}ald, {L}. and {L}inguet, {L}.},
  editor = {},
  language = {{ENG}},
  abstract = {{A}bstract. {T}he {H}eliosat-{II} method was developed to process {M}eteosat satellite images in order to assess the solar irradiation at surface. {I}t is modified for its use with {GOES} satellite images in order to estimate the solar irradiation over {F}rench {G}uiana. {M}odifications include a change in the calibration formula, in the calculation of the cloud albedo, and in the values of the {L}inke turbidity factor. {T}hese modifications allow the improvement of the performances of the {H}eliosat-{II} model in {I}ntertropical zones in {F}rench {G}uiana. {T}he outcomes were compared to coincident measurements of hourly irradiation performed by ground stations. {T}he results show that the use of the maximum apparent albedo as the cloud albedo (rho c(max)), along with a fixed value of the {L}inke turbidity factor produces the best results; the bias was less than 23.61 {W}h/m(2) (5% of the mean value of the measurements) overall, and the {RMSE} was less than 109.39{W}/m(2) (24%) overall when using hourly values. {I}n the case of daily means, the {RMSE} drops to less than 10.08{W}/m(2) (10%) overall, whereas the overall bias remains unchanged, as expected. {T}he model performs better in clear skies than in cloudy skies. {T}he results suggest that the {L}inke turbidity factor used in the {H}eliosat-{II} method does not reproduce well the attenuation of the solar radiation in {F}rench {G}uiana. {T}he results were compared to those obtained from {H}eliosat {II} method and {M}eteosat images ({H}elio{C}lim-3 database) and we found a better accuracy for {GOES} satellite data, which exhibits smaller viewing angle. {T}he use of the {H}eliosat {II} method with {GOES} images allows assessment of the {SSI} with a good accuracy and high temporal and spatial resolutions. {R}esume. {L}a methode {H}eliosat-{II} a ete developpee pour traiter des images du satellite {M}eteosat de facon a estimer l'irradiation solaire en surface. {E}lle a ete modifiee pour etre employee avec des images du satellite {GOES} de facon a estimer l'irradiation solaire au-dessus de la {G}uyane {F}rancaise. {L}es modifications incluent un changement dans la formule d'etalonnage, dans le calcul de l'albedo des nuages et dans les valeurs de {T}rouble de {L}inke. {C}es modifications permettent l'amelioration des performances du modele {H}eliosat-{II} en zone intertropicale, notamment en {G}uyane {F}rancaise. {L}es resultats ont ete compares a des mesures horaires coincidentes d'irradiation horaire realisees par des stations de mesure au sol. {L}es resultats montrent que l'utilisation de l'albedo apparent maximal en tant qu'albedo des nuages (rho c(max)), ainsi qu'une valeur fixe de {T}rouble de {L}inke produit les meilleures estimations; le biais est inferieur a 23,61 {W}h/m(2) (5% de la valeur moyenne des mesures) dans l'ensemble et le {RMSE} est inferieur a 109,39 {W}h/m(2) (24%) dans l'ensemble en utilisant des valeurs horaires. {D}ans le cas de moyennes journalieres, le {RMSE} vaut moins de 10,08{W}/m(2) (10%) alors que le biais a demeure inchange comme attendu. {L}e modele fonctionne mieux en ciel clair qu'en ciel couvert. {L}es resultats suggerent que le {T}rouble de {L}inke utilise dans la methode {H}eliosat-{II} ne reproduit pas correctement l'attenuation du rayonnement solaire en {G}uyane {F}rancaise. {L}es resultats ont ete compares a ceux obtenus par la methode {H}eliosat {II} avec les images {M}eteosat ({H}elio{C}lim 3) et nous avons obtenu une meilleure precision pour les donnees issues du satellite {GOES}, qui presente un plus faible angle de visee. {L}'utilisation de la methode {H}eliosat {II} avec des images {GOES} permet l'estimation de l'irradiation solaire de surface avec une bonne precision et a des resolutions temporelles et spatiales elevees},
  keywords = {},
  booktitle = {},
  journal = {{C}anadian {J}ournal of {R}emote {S}ensing},
  volume = {41},
  numero = {2},
  pages = {86--100},
  ISSN = {0703-8992},
  year = {2015},
  DOI = {10.1080/07038992.2015.1040876},
  URL = {https://www.documentation.ird.fr/hor/fdi:010064811},
}