EOS Aqua (PM-1)
The Earth Observing System Aqua (formerly EOS PM) will help to provide environmental answers. Flying in an orbit that covers the globe every 16 days, EOS Aqua will provide a six year chronology of the planet and its processes. Comprehensive measurements taken by its onboard instruments will allow scientists to assess long-term change, identify its human and natural causes and advance the development of models for long-term forecasting. Aqua launched on May 4, 2002.