Landsat 3 is the third satellite of the Landsat program. It was launched on March 5, 1978, with the primary goal of providing a global archive of satellite imagery (satellite data are called images and not photos because they are not just reflected light exposure, but recordings of radiative electromagnetic energy fluxes of surface materials). Unlike later Landsats, Landsat 3 was managed solely by NASA. Landsat 3 is no longer in operation, having been decommissioned on September 7, 1983, far beyond its designed life expectancy of one year.
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