1. many of these products span over 35 years -- from 1981 to the present, especially valuable for long-term environmental change studies;

2. the radiation products have the spatial resolution of 5km, much finer than the commonly used products (e.g., CERES, GEWEX);

3. all products are spatially and temporally continuous with no gaps and missing values;

4. The broadband longwave emissivity product is the first product of this kind in the world at 8-day temporal resolution and 1km spatial resolution;

5. the GLASS products have been demonstrated to have high quality and accuracies. They have been widely used ;