LM has SSB.
Quote from: jdon759 on 02/27/2022 07:41 pmIs the ICM still around?If it actually becomes necessary to replace the ROS, could that do it? It is almost exactly what it was designed for.Yea it exists but was returned to the DoD as no longer needed. Last I heard several years ago it was slated for modifications for permanent display and transfer to a museum or face scrapping. The surplus hardware inventory is gradually being cleared out over time to cut down on mothballed and clean room storage costs.
Is the ICM still around?If it actually becomes necessary to replace the ROS, could that do it? It is almost exactly what it was designed for.
Quote from: Jorge on 02/27/2022 07:41 pmQuote from: Jim on 02/27/2022 07:23 pmQuote from: alugobi on 02/27/2022 06:57 pmThere's definitely a lot of that.But the solution is simple.No, it isn'tMost of these guys are fixated on reboost and that isn't even the hardest problem (though it is plenty hard). CMG desat is. It's harder because it has to be more tightly integrated into ISS GNC.Thanks for answering my previous question, Jorge. I have another.How often do desats typically have to happen or is that heavily dependent on atmosphere and orientation?
Quote from: Jim on 02/27/2022 07:23 pmQuote from: alugobi on 02/27/2022 06:57 pmThere's definitely a lot of that.But the solution is simple.No, it isn'tMost of these guys are fixated on reboost and that isn't even the hardest problem (though it is plenty hard). CMG desat is. It's harder because it has to be more tightly integrated into ISS GNC.
Quote from: alugobi on 02/27/2022 06:57 pmThere's definitely a lot of that.But the solution is simple.No, it isn't
There's definitely a lot of that.But the solution is simple.
Quote from: Baldr on 02/27/2022 10:14 pmQuote from: Jeff Lerner on 02/27/2022 09:07 pmThings seem to moving at breakneck speed…all the proposed solutions here seem to require weeks, months, etc…what happens if Putin decides within days to shut the RUssian segments of ISS down ?I know the Astronauts and cosmonauts and support centres are all consummate professionals but does anyone have any idea what the current state of ISS Crew relations are ?..must be very difficult to float by a crew member without saying something about what’s going on ..Yesterday, I suggested to use the Artemis 1 spacecraft (Orion capsule and service module) to replace, at least, the attitude control and desaturation maneuvers (CMG) of the Russian Segment. What's important would be to get the Artemis 1 docked to the ISS ASAP. What is valuable is the Service Module and not the Orion capsule.https://forum.nasaspaceflight.com/index.php?topic=55882.0 No, the Service module doesn’t [have] the thrusters to do Desat
Quote from: Jeff Lerner on 02/27/2022 09:07 pmThings seem to moving at breakneck speed…all the proposed solutions here seem to require weeks, months, etc…what happens if Putin decides within days to shut the RUssian segments of ISS down ?I know the Astronauts and cosmonauts and support centres are all consummate professionals but does anyone have any idea what the current state of ISS Crew relations are ?..must be very difficult to float by a crew member without saying something about what’s going on ..Yesterday, I suggested to use the Artemis 1 spacecraft (Orion capsule and service module) to replace, at least, the attitude control and desaturation maneuvers (CMG) of the Russian Segment. What's important would be to get the Artemis 1 docked to the ISS ASAP. What is valuable is the Service Module and not the Orion capsule.https://forum.nasaspaceflight.com/index.php?topic=55882.0
Things seem to moving at breakneck speed…all the proposed solutions here seem to require weeks, months, etc…what happens if Putin decides within days to shut the RUssian segments of ISS down ?I know the Astronauts and cosmonauts and support centres are all consummate professionals but does anyone have any idea what the current state of ISS Crew relations are ?..must be very difficult to float by a crew member without saying something about what’s going on ..
Quote from: Brovane on 02/27/2022 11:26 pmQuote from: Jim on 02/27/2022 08:54 pmQuote from: AllenB on 02/27/2022 08:14 pmRight now, in 2022, is there any organization with the right combination of assets (human and machine) more qualified to tackle this than SpaceX? I can't think of one.Yes, NG, Maxar, or LM. Not going to say Boeing.NG has Cygnus and MEV. Maxar has its electric buses. LM has SSB.I think in this instance the interests of all the parties involved would be best served by SpaceX just being the launch provider. Not true either.
Quote from: Jim on 02/27/2022 08:54 pmQuote from: AllenB on 02/27/2022 08:14 pmRight now, in 2022, is there any organization with the right combination of assets (human and machine) more qualified to tackle this than SpaceX? I can't think of one.Yes, NG, Maxar, or LM. Not going to say Boeing.NG has Cygnus and MEV. Maxar has its electric buses. LM has SSB.I think in this instance the interests of all the parties involved would be best served by SpaceX just being the launch provider.
Quote from: AllenB on 02/27/2022 08:14 pmRight now, in 2022, is there any organization with the right combination of assets (human and machine) more qualified to tackle this than SpaceX? I can't think of one.Yes, NG, Maxar, or LM. Not going to say Boeing.NG has Cygnus and MEV. Maxar has its electric buses. LM has SSB.
Right now, in 2022, is there any organization with the right combination of assets (human and machine) more qualified to tackle this than SpaceX? I can't think of one.
Quote from: butters on 02/28/2022 01:24 amQuote from: Jim on 02/28/2022 01:00 amAtlas is available if needed.I should hope Bezos would be so accommodating as to trade one of Kuiper's Atlases for a Vulcan if it's necessary to keep the ISS in orbit. It would be a real heel turn if he made a fuss about that.My hypothesis: There is contract language allowing ULA to re-purpose launch vehicle(s) in case of an emergency.Experts, what say you?
Quote from: Jim on 02/28/2022 01:00 amAtlas is available if needed.I should hope Bezos would be so accommodating as to trade one of Kuiper's Atlases for a Vulcan if it's necessary to keep the ISS in orbit. It would be a real heel turn if he made a fuss about that.
Atlas is available if needed.
What specific need in this scenario is the Atlas-V filling that the F9 cannot? The only thing I can think of is VI and it isn't a SpaceX LV. Is there something else?
Cygnus or MEV type would make a better system.
all the Atlas Vs are spoken for,
Quote from: Jorge on 02/27/2022 07:41 pmQuote from: Jim on 02/27/2022 07:23 pmQuote from: alugobi on 02/27/2022 06:57 pmThere's definitely a lot of that.But the solution is simple.No, it isn'tMost of these guys are fixated on reboost and that isn't even the hardest problem (though it is plenty hard). CMG desat is. It's harder because it has to be more tightly integrated into ISS GNC.ISS is many months away from decaying to the "no-return" altitude. But at any given time, if the CMGs saturate and there are no thrusters to desat, ISS loses attitude control and from that point its power/thermal lifetime is measured in days, if not hours.I believe that atmo drag (maybe light pressure, whichever) can be used to achieve CMG desat, cunning orientation of the station is required. Cygnus can then be used for reboot. That should give time for someone to build something.
Quote from: Jim on 02/27/2022 07:23 pmQuote from: alugobi on 02/27/2022 06:57 pmThere's definitely a lot of that.But the solution is simple.No, it isn'tMost of these guys are fixated on reboost and that isn't even the hardest problem (though it is plenty hard). CMG desat is. It's harder because it has to be more tightly integrated into ISS GNC.ISS is many months away from decaying to the "no-return" altitude. But at any given time, if the CMGs saturate and there are no thrusters to desat, ISS loses attitude control and from that point its power/thermal lifetime is measured in days, if not hours.
Quote from: Brovane on 02/28/2022 11:47 amWhat specific need in this scenario is the Atlas-V filling that the F9 cannot? The only thing I can think of is VI and it isn't a SpaceX LV. Is there something else? cygnus has already launched on atlas. would be faster than qualifying it for falcon.
Because the cables and controllers that are gone were Russian made.
So, the options are:A) Purchase new cables and controllers from the Russians (even if they are no longer in production, I'm quite sure the blueprints are available somewhere -- for the right amount of $$$, of course).B) Reverse engineer the cables and controllers.
A) Purchase new cables and controllers from the Russians (even if they are no longer in production, I'm quite sure the blueprints are available somewhere -- for the right amount of $$$, of course).B) Reverse engineer the cables and controllers.
Quote from: Baldr on 02/28/2022 02:04 pmA) Purchase new cables and controllers from the Russians (even if they are no longer in production, I'm quite sure the blueprints are available somewhere -- for the right amount of $$$, of course).B) Reverse engineer the cables and controllers.A is not going to happen. That is why we are this situation. If they nice enough to help us, we don't need to do the separation. b. We don't know enough to do that.
