The MODIS Version 6 (Collection 6) Snow Cover and Sea Ice data sets, accessible through the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) will be retired in August of 2023. After this date, access to the data will no longer be available, but documentation will remain available for future reference. NSIDC encourages users to switch to the newer MODIS Version 6.1 (Collection 6.1) data.
The NSIDC DAAC provides access to the MODIS data and documentation at the following location: NSIDC DAAC MODIS Data Collection.