The CRS-10 mission includes an Earth observation instrument called SAGE III. The 2,200-pound instrument is stored inside the trunk of the Dragon. Short for Stratospheric Aerosol and Gas Experiment, the SAGE III is the latest observatory for the program that flew the first SAGE in 1979. The instrument examines levels of ozone and other gases in the upper atmosphere of Earth. For more about SAGE III, take a look at the press kit here.