The Global LAnd Surface Satellite Products System（GLASS） albedo product provides a gap-filled shortwave albedo map with high temporal resolution through which the occurrence of snow and rain and the variation of vegetation status can be d etected.The GLASS albedo is retrieved with the Angular Bin（AB） algorithm

which can estimate the shortwave albedo from a single observation of reflectance. To assess the accuracy of this albedo product

FLUXNET observations were used to calculate the actual surface albedo as the true value to validate the high-spatial resolution albedo derived from Landsat Thematic Mapper（TM） imagery at30 m by the AB algorithm. The Landsat TM albedo was then aggregated to 1 km resolution and was compared with the GLASS albedo at 1 km. The absolute error of the GLASS albedo is less than 0. 0163

which demonstrates itsreliabilityfor most a pplication requirements.