Diverse Holdings
nDeclassification 1960-1980   900,000*
nLandsat MSS 1972-1992   650,000
nLandsat TM 1982-Today   500,000
nAVHRR 1988-Today   275,000
nSPOT 1986-1998   800,000
nLandsat ETM+ 1999-Today   300,000
nAerial Photography 1937-Today          8,200,000*
n
n* Film-Based