Key Facts - Landsat 4/5

• The Landsat Program is one of the longest running programmes for image acquisition from space, first launched in 1972 the program is managed between the U.S. Geological Survey and NASA.
• Seven satellites have so far been launched, the most recent being Landsat 7, on April 15, 1999.
• Landsat satellite imagery offers a unique resource for global change research and applications in agriculture, geology, forestry, regional planning, education, and national security.
• The FAQ section of the Landsat Program website is a useful place to find out general information, global data coverage, image processing etc.