The Landsat program 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.
Landsat 7 was launched in 1999 and remains operational. The Scan Line Corrector failed in 2003, however, causing data acquisitions to be degraded.
|Launch Date||15 April 1999|
|Orbit Height||705 km|
|Orbit Type||Sun-synchronous polar|
|Repeat Cycle||16 days|
|End of Service||Still operational|
|Orbit Period||99 min|
|Equatorial Crossing time||10:00 a.m|
|Onboard sensors provided under TPM||Enhanced Thematic Mapper Plus (ETM+)|
Landsat 7 is part of ESA's Third Party Missions Programme, in which ESA has an agreement to distribute data products from the missions.