The Langley DAAC (Distributed Active Archive Center) archives and distributes NASA science data in the areas of radiation budget, clouds, aerosols, and tropospheric chemistry. The Langley DAAC will archive some of the datasets which result from the Earth Observing System (EOS) program and other elements of Mission to Planet Earth. This page provides information on Projects Supported, Future Data Products, Accessing Data, Documentation, User and Data Services, DAAC Frequently Asked Questions, and other DAACs.