ACE
ACE2 (Altimeter Corrected Elevations) DEM is a global DEM at 3" (approx 90m at the equator), 9", 30' (approx 1km at the equator) and 5' resolution.This dataset has been created by fusing the high frequency content of the SRTM dataset with heights from multi-mission Satellite Radar Altimetry
For additional information and data products please see the following web sites