The Landsat programme is a joint USGS and NASA-led enterprise for Earth Observation that represents the world's longest running system of satellites for moderate-resolution optical remote sensing for land, coastal areas and shallow waters.
The first Landsat mission was launched in 1972, and was the first Earth observation satellite with the goal to monitor the world's land. It was soon followed by successors, and the series continues to this day.
|Landsat 1||Landsat 2||Landsat 3|
|Operators||NASA (National Aeronautics and Space Administration)||NASA (National Aeronautics and Space Administration)||NASA (National Aeronautics and Space Administration)|
|Launch Dates||23 July 1972||22 January 1975||5 March 1978|
|End of Service||6 January 1978||Removed from operations on 25 February 1982. Decommissioned on 27 July 1983.||Placed in standby mode on 31 March 1983 and decommissioned on 7 September 1983.|
|Orbit Height||907 km||908 km||917 km|
|Orbit Type||Sun-synchronous near-polar||Sun-synchronous near-polar||Sun-synchronous near-polar|
|Repeat Cycle||18 days||18 days||18 days|
|Equatorial Crossing Time||9:30 a.m.||9:45 a.m.||9:30 a.m.|
|Onboard sensors provided under TPM||Multispectral Scanner (MSS)||Multispectral Scanner (MSS)||Multispectral Scanner (MSS)|
Landsat 1 to 3 are part of ESA's Third Party Missions Programme, in which ESA has an agreement to distribute data products from the missions.