The purpose of NASA's Earth science program is to develop a scientific understanding of Earth's system and its response to natural or human-induced changes, and to improve prediction of climate, weather, and natural hazards. This homepage of NASA's Earth Science Data program provides links to the Earth Observing System Data and Information System (EOSDIS), CloudSat Data Processing Center, Laboratory for Atmospheric and Space Physics (LASP) Interactive Solar Irradiance Data Center and the Precipitation Processing System (PPS).