Welcome to the Earthdata Forum! Here, the scientific user community and subject matter experts from NASA Distributed Active Archive Centers (DAACs), and other contributors, discuss research needs, data, and data applications.
I am the user representative for this data set at NSIDC. I just wanted to add that version 3 of the NOAA/NSIDC Climate Data Record of Passive Microwave Sea Ice Concentration data set will soon no longer be available. Public access to version 3 will no longer be available after 18 February 2022. There are a lot of differences between version 3 and version 4, so in general we recommend using the latest version of the data, version 4: https://nsidc.org/data/g02202/versions/4.