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NASA's Earth Observing System (EOS) comprises a series of satellites, a science component and a data system which is called the Earth Observing System Data and Information System (EOSDIS). EOSDIS distributes thousands of Earth system science data products and associated services for interdisciplinary studies. Almost all data in EOSDIS are held on-line and accessed via ftp.

There are several ways to search for Earth system science data of interest:

Data Tool/Service/CenterDescription
Global Change Master Directory (GCMD)Directory level dataset catalog
ReverbInventory level cross-Data Center dataset and service search & access client
EOSDIS Data CentersThe data centers have individual online systems that allow them to provide unique services for users of a particular type of data
EOSDIS Data Service DirectoryEOSDIS search, visualization and analysis tool directory
Earth Observing System (EOS) Clearing House (ECHO)Application Program Interfaces (APIs) for inventory level cross-Data Center dataset and service search & access