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Results tagged with station-keeping
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Operations done to keep a spacecraft in a particular orbit. Generally done by by thruster burns. In LEO this must be done to counteract the momentum loss to atmospheric drag. In other orbits it may be needed to maintain a planned relative position over a long period of time.
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What propulsion methods does the ISS use for station-keeping?
Biprop attitude control thrusters using UDMH and N2O4 in a docked Progress vehicle are used to reboost ISS using about four Progress vehicles a year.
More recently, ESA's ATVs have also been doing re …
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6
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Xenon vs Hydrazine, "Should I Stay or Should I go?" Dawn mission decisions
There is one wheel still operable (at least it was operable the last time they operated it), but Dawn no longer uses it. The third wheel failure was in April of this year (2017 for those reading this …
- 58.4k