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A version of NCSA's Hierarchical Data Format (HDF)—a package of software, libraries, and tools for analyzing, visualizing, and converting scientific data—is already in use with data being gathered by NASA's Terra satellite, one of the Earth Observing Systems (EOS) launched to collect data for the Global Change Research Program. Terra, which was launched in December 1999 and officially began transmitting data last April, uses HDF4.
Another EOS satellite, called Aqua, is expected to launch in late 2001 and will also utilize HDF4. Aura, the third EOS satellite, is expected to launch in 2002 and will rely on a newer version of HDF called HDF5.
Managing
terabytes for Terra (an article from NCSA)
HDF-EOS
4 Tools and Softaware (from USGS EROS Data Center)
NASA
Uses NCSA Hierarchical Data Format for Data Storage and Management (NCSA
Article on NASA's use of HDF-EOS 4)