Resource at https://ecco.jpl.nasa.gov/
https://ecco.jpl.nasa.gov/drive/files/Version4/Release3

Resource at https://psmsl.org/
https://psmsl.org/data/obtaining/

Resource at https://resources.marine.copernicus.eu/
https://resources.marine.copernicus.eu/product-detail/SEALEVEL_GLO_PHY_L4_MY_008_047/INFORMATION