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8 votes
1 answer
836 views

How much time does it take to circularize a GTO orbit using ion propulsion?

SpaceX launched two GEO comsats, and is about to launch two more, that use all-electric ion propulsion. Now, I'm wondering, how much time would it take to actually make a satellite like that ...
radex's user avatar
  • 1,652
4 votes
1 answer
1k views

How did SES-9 reach geostationary orbit from inclined transfer orbit (from F9 2nd stage)

The Spaceflight Now article Flight timeline for Falcon 9’s launch of SES 9 says near the end that the Falcon 9 2nd stage will leave SES-9 in an elliptical, inclined transfer orbit. And Falcon 9 rocket ...
uhoh's user avatar
  • 149k
8 votes
2 answers
1k views

What will be "unique" about upcoming SES-9 GTO transfer profile by SpaceX?

In the SES-9 mission press kit, SpaceX mentions: "Given this mission’s unique GTO profile, a successful landing is not expected." What is considered "unique" about this transfer orbit's profile? ...
uhoh's user avatar
  • 149k