SR-NT_25_2.0.0 Data sources Level 1 Satellite Imagery Systematic Terrain Correction Imagery Ephemeris Data Maximum Satellite View Angle Earth rotational angular velocity Earth-sun Distance Spectral Filter Solar Irradiance MODIS BRDF Shape Function BRDF Database SRTM DSM/DEM data Aerosol Optical Depth Monthly Ozone Imagery Total Water Vapour CO2 Concentration MODTRAN Seasons USGS Ground Control Points (GCP) Major algorithms Surface Reflectance (Li, 2010) Processing steps Extract metadata from data sources Calculate sun and sensor angles per pixel (Vincenty, 1975; Edberg and Oliver, 2013) Determine values for six base atmospheric parameters across each image scene Derive normalised surface reflectance for sun angle of 45° Ortho-processing using DSM Schema/Spatial Extent DEA Albers Raster Schema Services GSKY WMS