Landsat Image Mosaic of Antarctica (LIMA) (opens in a new tab)
USGS, British Antarctic Survey and NASA
Cost Free Licence Not open- Satellite imagery
Restricted National orthophotography exists but is not openly licensed: it is sold, view-only without reuse rights, or limited to government use.
Sub-metre Vantor satellite imagery of Antarctica is available through the Polar Geospatial Center only to NSF-funded and U.S. Government polar researchers; the PGC also distributes historical U.S. Navy trimetrogon aerial photographs (1946–2000), and the Landsat Image Mosaic of Antarctica (LIMA) is free to download.
Free is not the same as open. Cost is what you pay to get the data; the licence says what you may do with it. How cost and licence are defined
USGS, British Antarctic Survey and NASA
Cost Free Licence Not openPolar Geospatial Center / USGS EROS
Cost Free Licence Not openPolar Geospatial Center, University of Minnesota
Cost Free with registration Licence Not open