LANDSAT
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LANDSAT Document Transcript

  • 1. LANDSAT 1, 2, 3, 4, 5, 6, 7 Satellites and Their Specification The Landsat celebrating Successful 40 Years.The Landsat program is the longest running enterprise for acquisition of satelliteimagery of Earth. On July 23, 1972 the Earth Resources Technology Satellite was launched.This was eventually renamed to Landsat. The most recent, Landsat 7, was launched onApril 15, 1999. The instruments on the Landsat satellites have acquired millions of images.The images, archived in the United States and at Landsat receiving stations around theworld, are a unique resource for global change research and applicationsin agriculture, cartography, geology, forestry, regional planning, surveillance, educationand national security. Landsat 7 data has eight spectral bands with spatialresolutions ranging from 15 to 60 meters; the temporal resolution is 16 days.
  • 2. General Features LANDSAT 1 LANDSAT 2 LANDSAT 3 LANDSAT 4 LANDSAT 5 LANDSAT 6 LANDSAT 7Launch Date July 23, 1972 January 22, March 5, July 16 , 1982 March 1, 1984 October 5, April 15, 1999 1975 1978 1993 Status Expired, Expired, Expired, Decommissioned, TM still lost at Operational despite January 6, February 5, March 31, June 15, 2001 operational! MSS launch Scan Line Corrector 1978 1982 1983 instrument (SLC) failure May 31, decommissioned 2003 Sensors RBV, MSS RBV, MSS RBV, MSS TM, MSS TM, MSS ETM ETM+ Altitude 900 km 900 km 900 km 705 km 705 km 705 km Inclination 99.2° 99.2° 99.2° 98.2° 98.2° 98.2° Orbit polar, sun- polar, sun- polar, sun- polar, sun- polar, sun- polar, sun- synchronous synchronous synchronous synchronous synchronous synchronous Equatorial nominally 9:42 AM mean 9:42 AM nominally 9:45 AM 9:45 AM (± 15 10 AM (± 15 min.)Crossing Time 9:42 AM local time mean local (± 15 min.) local min.) local time local time mean local (descending time time (descending (descending (descending node) time node) (descending node) node) (descending node) node) Period of 103 minutes; 103 minutes; 103 minutes; 99 minutes; ~14.5 99 minutes; ~14.5 99 minutes; ~14.5 Revolution ~14 ~14 ~14 orbits/day orbits/day orbits/day orbits/day orbits/day orbits/day Repeat 18 days 18 days 18 days 16 days 16 days 16 days Coverage