NASA researcher Joaquin Chaves calls it "ground truthing," even though land is nowhere in sight. This spring, Chaves boarded the Atlantic Meridional Transect (AMT) research cruise for six weeks of sampling water and taking measurements as the ship traversed the Atlantic Ocean. His team, based at NASA's Goddard Space Flight Center in Greenbelt, Maryland, uses …
Six Weeks at Sea: NASA Scientists Double-Check Satellite Ocean Color Data
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