This tutorial showing how to download the latest 1arc-second version of digital elevation model (NASADEM)
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NASA released the free global digital elevation model NASADEM on February 2020. NASADEM is a near-global elevation model that is being produced primarily by completely reprocessing the Shuttle Radar Topography Mission (SRTM) radar data and then merging it with refined ASTER GDEM elevations.
The new and improved SRTM elevations in NASADEM result from better vertical control of each SRTM data swath via reference to ICESat elevations and from SRTM void reductions using advanced interferometric unwrapping algorithms. Remnant voids will be filled primarily by GDEM3, but with reduction of GDEM glitches (mostly related to clouds) and therefore with only minor need for secondary sources of fill.
Read More: https://blog.arabnubia.com/2020/04/updated-version-of-global-elevation-data-nasadem/
Download Tunisia DEM applied in this tutorial from here: https://blog.arabnubia.com/2020/05/tunisia-nasadem-digital-elevation-model-1-arc-second/
Downlaod Egypt DEM from here: https://blog.arabnubia.com/2020/05/egypt-nasadem-digital-elevation-model-1-arc-second/
Official NASADEM site: https://lpdaac.usgs.gov/news/release-nasadem-data-products/
Find data on NASA Earthdata Search: https://search.earthdata.nasa.gov/search?q=C1546314043-LPDAAC_ECS