Landsat 4 to 5
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Landsat 4 to 5 were the second-generation of Earth observation satellites operated by NASA and the USGS. They were built using the Multimission Modular Spacecraft (MMS) bus, which were originally intended with Shuttle servicing missions in mind. Both satellites were launched in 1982 and 1984, remaining in active service until 2001 and 2013 respectively.
| Landsat Program (1972–Present) |
||
|---|---|---|
| Mission | Start | End |
| Landsat 4 | 1982-Jul-16 | 2001-Jun-15 |
| Landsat 4's original mission ended in December 1993. Reentered the Earth's atmosphere on October 2025. | ||
| Landsat 5 | 1984-Mar-1 | 2013-Jun-5 |
| Previously in active service for 29 years, currently recognized as the longest Earth-observing mission in history. Expected to reenter by 2034. | ||
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