The NASA Reverb data search and order tool now has services to subset NASA GLAS HDF5 data both spatially and temporally. For further information, see How to subset GLAS HDF5 data.
The NSIDC Web site and data services are currently having intermittent problems and may be unavailable. We are working to restore these services as soon as possible and apologize for any inconvenience this may cause. Please contact NSIDC User Services for assistance.