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#140
by
Targeteer
on 22 Mar, 2024 00:35
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About 1730 eastern the crew called down to get the location of the second stage because the deorbit burn was upcoming and they were in the cupola hoping to see it. CAPCOM checked and the answer was that both Dragon and the stage were directly below them, then corrected to below and slightly starboard. The crew response was "we will be directing a Cygnus departure", apparently it was blocking their view. My question, if Dragon and ISS were that close together shortly after launch, why a 2 day approach?
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#141
by
jcm
on 22 Mar, 2024 00:44
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About 1730 eastern the crew called down to get the location of the second stage because the deorbit burn was upcoming and they were in the cupola hoping to see it. CAPCOM checked and the answer was that both Dragon and the stage were directly below them, then corrected to below and slightly starboard. The crew response was "we will be directing a Cygnus departure", apparently it was blocking their view. My question, if Dragon and ISS were that close together shortly after launch, why a 2 day approach?
Still a long way below them, with a significantly shorter orbital period. In any rendezvous with ISS the
visiting vehicle will pass directly below ISS once an orbit.
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#142
by
launchwatcher
on 22 Mar, 2024 12:57
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Still a long way below them, with a significantly shorter orbital period. In any rendezvous with ISS the
visiting vehicle will pass directly below ISS once an orbit.
Not once an orbit - less often than that if the orbits are close.
If, hypothetically, the VV stayed in an orbit where it did 10 orbits around the Earth in the time the ISS did 9, it would pass the ISS only once every 10 if its orbits (and once every 9 of the ISS's orbits). Numbers picked at random; for a two day rendezvous to the ISS in a 90-minute orbits it might well be more like 33 and 32 orbits.
In reality, over that time period the VV would do a series of phasing burns, tweaking its orbit to that it would arrive in the vicinity of the ISS while moving at nearly the same velocity as the ISS so only a relatively gentle burn would be required at arrival to match speeds and line up to dock.
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#143
by
Vettedrmr
on 22 Mar, 2024 13:55
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And people get irate when I tell them I have low confidence in the MSM.
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#144
by
DanClemmensen
on 22 Mar, 2024 14:48
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#145
by
joek
on 22 Mar, 2024 15:25
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And people get irate when I tell them I have low confidence in the MSM.
This is not MSM, it is a fringe media-aggregator, which in turn gets sucked in by other aggregators, etc. There are a zillion other such stupid-incorrect stories out there. We could spend endless cycles ridiculing them.
Not worthy of notice or discussion on these threads.
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#146
by
Targeteer
on 23 Mar, 2024 07:52
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No audio activity on the ISS Youtube feed. Someone needs to reset a button at MCC-H, I think. I heard Rob Navias, briefly, a while ago. Probably a comms check.
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#147
by
sdsds
on 23 Mar, 2024 08:26
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Media channel coverage coming soon.
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#148
by
Targeteer
on 23 Mar, 2024 08:31
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NASA TV coverage started, Rob Navias as I said.
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#149
by
Targeteer
on 23 Mar, 2024 08:32
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Dragon visible on station cameras
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#150
by
centaurinasa
on 23 Mar, 2024 08:34
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#151
by
FutureSpaceTourist
on 23 Mar, 2024 08:35
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#152
by
FutureSpaceTourist
on 23 Mar, 2024 08:36
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#153
by
centaurinasa
on 23 Mar, 2024 08:40
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Approach Initiation burn complete.
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#154
by
centaurinasa
on 23 Mar, 2024 08:43
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Meanwhile, Soyuz MS-25 launch in about 3 hours...
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#155
by
sdsds
on 23 Mar, 2024 08:44
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Heading for Harmony zenith so waypoint 1 is on the +R bar.
Images of SpaceX and ISS control rooms.
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#156
by
Targeteer
on 23 Mar, 2024 08:46
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I'll ask this question for maybe the tenth time. Why are the approach ellipsoid and keep out sphere never mentioned during Russian spacecraft operations?
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#157
by
Targeteer
on 23 Mar, 2024 08:56
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NASA can't toggle between two video feeds? Showing photos from Baikonour...
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#158
by
centaurinasa
on 23 Mar, 2024 08:59
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Mi-course burn soon...
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#159
by
Targeteer
on 23 Mar, 2024 09:04
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Lots of empty chairs at MCC-H during a "brief gap in satellite coverage". No TDRS-Z coverage/priority for the arrival of a US vehicle, again.