UPDATES OF ‘AW3D30’ ALOS GLOBAL DIGITAL SURFACE MODEL IN ANTARCTICA WITH OTHER OPEN ACCESS DATASETS

Abstract. In 2016, the first processing of semi-global digital surface models (DSMs) utilizing all archives stereo imageries derived from Panchromatic Remote sensing Instrument for Stereo Mapping (PRISM) onboard Advanced Land Observing Satellite (ALOS) was successfully completed. The dataset freely released to public in 30 m grid spacing as ‘ALOS World 3D - 30m (AW3D30)’, which generated its original version processed 5 or 2.5 spacing. has been updated since then improve absolute/relative height accuracies with additional calibrations. However, most significant update that should be applied improving data usability is filling void areas, correspond approx. 10% semiglobal coverage, mostly due cloud covers. 2020, we completed process by using other open-access elevation (DEMs) such Shuttle Radar Topography Mission (SRTM) DEM, Spaceborne Thermal Emission and Reflection Radiometer Global DEM (ASTER GDEM), ArcticDEM, etc., except Antarctica. this paper, report on remaining voids Antarctica DEMs Reference Elevation Model (REMA) DSM, TerraSAR-X add-on Digital Measurement (TanDEM-X, TDX) 90m ASTER GDEM complete void-free AW3D30 datasets.