NASA's EOSDIS stands for Earth Observing System Data and Information System. For this system, NASA's Distributed Active Archive Centers (DAACs) are scattered all around the USA. These centers work on processing, archiving, documenting, and distributing of the Earth Observation Data with the prime objecitve of the acessibility of the data in easiest possible way.
There are 12 DAACs each specializing in their unique functions.
~ Alaska Satellite Facility (ASF) DAAC: works on SAR Data,
~ Atmospheric Science Data Centre (ASDC): data relates to earth and the atomsphere,
~ Crustal Dynamics Data Information System (CDDIS): data relates with geodesy such as GNSS,
~ Global Hydrometerology Resource Center (GHRC) DAAC: focus on lightning, tropical cyclones, storm induced hazards,
~ Goddard Earth Sciences Data and Information Services Center (GES DISC): data relates with global climate such as atmospheric composition, precipitation,
~ Land Processes DAAC (LP DAAC): data relates with the land processes,
~ Level 1 and Atmosphere Archive and Distribution System (LAADS) DAAC: data related to MODIS products,
~ National Snow and Ice Data Center (NSIDC) DAAC: data relates with snow and ice processes,
~ Oak Ridge National Laboratory (ORNL) DAAC: data relates with the biogeochemistry, ecology and environmental processes,
~ Ocean Biology DAAC (OB.DAAC): satellite bases ocean biology data,
~ Physical Oceanography DAAC (PO.DAAC): oceanographic and hydrological data,
~ Socioeconomic Data and Applications Center (SEDAC): Earth science and socioeconomic data,