Timeline for ISS observation and orbit plane
Current License: CC BY-SA 3.0
10 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 9, 2016 at 13:20 | vote | accept | culebrón | ||
| Feb 9, 2016 at 0:03 | answer | added | PearsonArtPhoto♦ | timeline score: 5 | |
| Feb 8, 2016 at 23:06 | comment | added | TildalWave | Sorry, I didn't mean to suggest that you don't, I was just having problems understanding your question. I guess a similar plot than the solar beta angle one could be done for ISS' longitude of the ascending node / synodic period in STK. I currently don't have access to it, but I'm sure someone has. | |
| Feb 8, 2016 at 22:45 | comment | added | culebrón | @TidalWave yes, I'm aware of orbital mechanics and that ISS passes nearby at different sides. I'm more interested in a more theoretical question: at what time does one Earth meridian cross the ascending node. I supposed orbit plane were stable like distant stars and behave accordingly. If orbital plane precesses to the west, then I guess it should be earlier and earlier every day. (Opposite of what I thought.) | |
| Feb 8, 2016 at 22:34 | comment | added | TildalWave | Yes. See e.g. How often does the ISS orbit align with the day/night terminator? Mind that the ISS isn't in a sun-synchronous orbit, so what you observe is partially also due to its orbital period of roughly 92 minutes, making over 15 orbits per day. You would see it cross nearly the same path at similar solar time over your local horizon about once ever 2 months, but you might also see its pass in two consecutive orbits. See here for more info on ground observations. | |
| Feb 8, 2016 at 22:27 | comment | added | culebrón | I was asking about orbital node. In my case not ascending/descending node but the "middle" between them. I read about this precession, so this means the orbit rotates a bit together with Earth? | |
| Feb 8, 2016 at 22:18 | comment | added | TildalWave | I'm not entirely sure what you're asking, but if you're asking about ISS' orbital node, then no, it is changing because of nodal precession. Mind that the station's altitude isn't constant, which also slightly changes its precession rate. If you're asking about the north-most boundary of its ground track, then yes, those are at nearly exact latitude to its orbital inclination, and those are stable (inclination of 51.65°). | |
| Feb 8, 2016 at 22:16 | history | edited | culebrón | CC BY-SA 3.0 |
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| Feb 8, 2016 at 22:05 | history | edited | culebrón | CC BY-SA 3.0 |
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| Feb 8, 2016 at 22:00 | history | asked | culebrón | CC BY-SA 3.0 |