Two NASA aircraft equipped with scientific instruments will fly over the Houston area throughout September of 2013 as part of a multi-year airborne science mission to help scientists better understand how to measure and forecast air quality from space.The aircraft are part of NASA's five-year DISCOVER-AQ study, which stands for Deriving Information on Surface conditions from Column and Vertically Resolved Observations Relevant to Air Quality.This two-engine B200 King Air aircraft, shown on the tarmac at NASA Langley Research Center in Hampton, Va., will collect data for the DISCOVER-AQ study looking downward from an altitude of 26,000 feet. The plane's instruments will look down at the Earth's surface, much like a satellite, and measure particulate and gaseous air pollution.> Read MoreImage Credit: NASA

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