Estimating surface solar irradiance from geostationary Himawari-8 over Australia: A physics-based method with calibration

摘要: Abstract Surface Solar Irradiance (SSI) is required for solar energy planning and adoption, a fundamental parameter in modelling weather, climate, ecosystem agricultural activities. Herein time series based radiative transfer model was developed to simultaneously retrieve properties of clouds, aerosols surface albedo, which were turn used calculate the components SSI: i.e., global, direct diffuse irradiance. The calculated results calibrated across Australian continent against in-situ measurements account minor factors (e.g., water vapor) not considered by physics-based method. Detailed validation SSI performed three years at 11 sites Australia, range scales (i.e., instantaneous, hourly, daily monthly) under both all-sky cloudy-sky conditions. main advantage present method reliable separation with consistently low biases (~4 W/m2) all four scales, while still maintaining relatively RMSE (root-mean-square-error) MAE (mean-absolute-error). Once calibration has been does require any ancillary data when implemented operationally: that only requires geostationary satellite data. This may be globe using widely available next generation handful ground-data calibration.