I'm just wondering how long it takes satellites from launch to orbiting in MEO.
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It will vary quite a bit with the exact MEO orbit and launcher used, but typically it would be something like:
- 10-15 minutes launch from surface to a MEO transfer orbit
- Coasting to apogee, anywhere from half an hour to several hours
- Circularization burn taking a few minutes
That gets the satellite into the desired orbit, but the satellite's mission may require it to be in a particular position in that orbit as well; depending on the satellite's capabilities, the phasing maneuvers could take days or even weeks (for ion thruster-powered sats, e.g.) to carry out.
Here's a typical example of a launch to 20,000km circular orbit inclined at 55º:
- ~4 minutes ascent on the first stage
- ~13 minutes on the second stage
- 3 hour coast to apogee
- about 1.5 minute circularization burn