Landsat 1: 1972–1978 Landsat 2: 1975–1982 Landsat 3: 1978–1983 Landsat 4: 1982–2001* data downlink capability failed in 1993 Landsat 5: 1984– Landsat 6: failed launch, 1993 Landsat 7: 1999– LDCM: Scheduled to launch in 2011
