NASA will soon be changing the file transfer protocol, a system for browsing and retrieving data, now in use on the NASA Sea Level Portal. The agency is retiring the current FTP service, available on PO.DAAC, on June 3, 2019, and is recommending that users switch to authenticated HTTPS. This will require creating a NASA Earthdata login profile. For help with HTTPS: https://podaac-tools.jpl.nasa.gov/drive/