Access to ICESat-2 Derived Canopy Height Model, Version 1 data set (IS2CHM) in the legacy, on-premises archive at the NASA National Snow and Ice Data Center Distributed Active Archive Center (NSIDC DAAC) has been retired. The NASA Earthdata Cloud is now the primary data archive for ICESat-2 data.
The NSIDC DAAC User Services Office provides support for direct data download from Earthdata Cloud HTTPS and access to our AWS Simple Storage Service (S3) buckets. For more details on these access options, please see:
https://nsidc.org/data/user-resources/help-center/nasa-earthdata-cloud-data-access-guide