How can I get ASTER or SRTM DEM for years like 2016, 2020,... in Google Earth Engine? I can't filter date for SRTM DEM in GEE. It seems that SRTM DEM doesn't have multi-year data, it was captured only in 2000 and available in GEeGEE. So what about ASTER DEM? Can I get it for the year like 2020? How can I filter date for it in GEE? (I can filter ImageCollection like Landsat but for images like DEM I can't filter date.)