Back لاند سات 7 Arabic Landsat 7 Byelorussian Landsat 7 Catalan Landsat 7 Czech Landsat 7 Danish Landsat 7 German Landsat 7 Esperanto Landsat 7 Spanish Landsat 7 Basque لندست ۷ Persian
 Landsat 7 before launch | |
| Mission type | Satellite imagery |
|---|---|
| Operator | NASA / USGS |
| COSPAR ID | 1999-020A |
| SATCAT no. | 25682 |
| Mission duration | 5 years (planned) 25 years, 7 months (in progress) |
| Spacecraft properties | |
| Bus | TIROS-N |
| Manufacturer | Lockheed Martin Space Systems |
| Launch mass | 1973 kg |
| Dimensions | 4.04 metre long 2.74 metre diameter |
| Power | 1550 watts |
| Start of mission | |
| Launch date | 15 April 1999, 18:32:00 UTC |
| Rocket | Delta II 7920 |
| Launch site | Vandenberg, SLC-2W |
| Contractor | Boeing |
| Entered service | 1999 |
| Orbital parameters | |
| Reference system | Geocentric orbit[1] |
| Regime | Sun-synchronous orbit |
| Altitude | 705 km |
| Inclination | 98.21° |
| Period | 98.83 minutes |
| Repeat interval | 16 days |
| |
Landsat 7 is the seventh satellite of the Landsat program. Launched on 15 April 1999, Landsat 7's primary goal is to refresh the global archive of satellite photos, providing up-to-date and cloud-free images. The Landsat program is managed and operated by the United States Geological Survey, and data from Landsat 7 is collected and distributed by the USGS. The NASA WorldWind project allows 3D images from Landsat 7 and other sources to be freely navigated and viewed from any angle. The satellite's companion, Earth Observing-1, trailed by one minute and followed the same orbital characteristics, but in 2011 its fuel was depleted and EO-1's orbit began to degrade.[2] Landsat 7 was built by Lockheed Martin Space Systems.
In 2016, NASA announced it planned to attempt the first ever refueling of a live satellite by refueling Landsat 7 in 2020 with the OSAM-1 mission;[3][4][5][6] however after multiple delays, NASA announced the cancellation of OSAM-1 in March 2024.[7]
- ^ "LANDSAT 7 Satellite details 1999-020A NORAD 25682". N2YO. 25 January 2015. Retrieved 25 January 2015.
- ^ EO-1 Phase F Report
This article incorporates text from this source, which is in the public domain.
- ^ Kleiner, Kurt (24 February 2022). "Orbiting robots could help fix and fuel satellites in space". Knowable Magazine. doi:10.1146/knowable-022422-1. Retrieved 10 March 2022.
- ^ Henshaw, Carl Glen; Glassner, Samantha; Naasz, Bo; Roberts, Brian (3 May 2022). "Grappling Spacecraft". Annual Review of Control, Robotics, and Autonomous Systems. 5: 137–159. doi:10.1146/annurev-control-042920-011106. ISSN 2573-5144. S2CID 242628083. Retrieved 10 March 2022.
- ^ "OSAM-1: Robotic Servicing Mission | NASA's Exploration & In-space Services". NASA NExIS. 3 July 2020. Archived from the original on 3 July 2020. Retrieved 3 July 2020. This article incorporates text from this source, which is in the public domain.
- ^ "NASA's Restore-L Mission to Refuel Landsat 7, Demonstrate Crosscutting Technologies". 23 June 2016. Retrieved 21 December 2017. This article incorporates text from this source, which is in the public domain.
- ^ Foust, Jeff (1 March 2024). "NASA cancels OSAM-1 satellite servicing technology mission". SpaceNews. Retrieved 2 March 2024.
