Author Topic: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)  (Read 63294 times)

Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #240 on: 11/09/2022 11:53 am »
in RTL "Ready To Latch" position.
To boldly go where no human has gone before !

Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #241 on: 11/09/2022 11:53 am »
1st stage capture: 4 latches closed "soft capture"
To boldly go where no human has gone before !

Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #242 on: 11/09/2022 11:54 am »
SSRMS in "limp mode" (no constraint on Cygnus by SSRMS)
To boldly go where no human has gone before !

Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #243 on: 11/09/2022 11:55 am »
GO for 2nd stage capture.
To boldly go where no human has gone before !

Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #244 on: 11/09/2022 11:56 am »
16 bolds drived
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Online FutureSpaceTourist

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #245 on: 11/09/2022 12:01 pm »
https://twitter.com/nasa_johnson/status/1590328549353091073

Quote
After launching on Nov. 7, #Cygnus was captured this morning at 5:20am ET by @AstroDuke and @astro_josh. Controls of the @Space_stationís robotic arm were then transferred to this team in Mission Control Houston, who are installing the spacecraft to the Unity module.

Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #246 on: 11/09/2022 12:05 pm »
Installation complete at 13.03 UTC.
Welcome "SS Sally Ride" !
« Last Edit: 11/09/2022 12:07 pm by centaurinasa »
To boldly go where no human has gone before !

Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #247 on: 11/09/2022 12:09 pm »
Next, Vestibule leak check performed by Francisco Rubio.
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Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #248 on: 11/09/2022 12:15 pm »
ISS configuration updated.
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Offline centaurinasa

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #249 on: 11/09/2022 12:17 pm »
Quote
Ground Controllers Install Cygnus on Station
Mark Garcia
Posted on November 9, 2022

Northrop Grummanís Cygnus spacecraft installation on the International Space Station is now complete. Cygnus, carrying over 8,200 pounds of cargo and science experiments, launched atop an Antares rocket at 5:32 a.m. EST Monday, Nov. 7 from NASAís Wallops Flight Facility in Virginia. At 5:20 a.m., NASA astronaut Nicole Mann, along with NASA astronaut Josh Cassada as backup, captured Cygnus using the Canadarm2 robotic arm.

Cygnus also is delivering a new mounting bracket that astronauts will attach to the starboard side of the stationís truss assembly during a spacewalk planned for Nov. 15. The mounting bracket will enable the installation of one of the next pair of new solar arrays.

Cygnus will remain at the space station until late January before it departs for a destructive re-entry into Earthís atmosphere.

https://blogs.nasa.gov/spacestation/2022/11/09/ground-controllers-install-cygnus-on-station/
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Offline woods170

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #250 on: 11/09/2022 01:28 pm »
Not the same failure mode as the Lucy Megaflex arrays: that was a tangled deployment lanyard partway through gore deployment, but here the Ultraflex array has swung out, but not rotated to final attitude, and the gores remain fully stowed (i.e. issue occurred before lanyard drive would have even started).

Your conclusion is premature. The only thing that has been determined is that there was negligible risk of sudden deploy of the array during approach, capture and berthing. Everything else, including the cause of the failure, is still being looked into.
« Last Edit: 11/10/2022 10:59 am by woods170 »

Offline edzieba

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #251 on: 11/09/2022 02:29 pm »
Not the same failure mode as the Lucy Megaflex arrays: that was a tangled deployment lanyard partway through gore deployment, but here the Ultraflex array has swung out, but not rotated to final attitude, and the gores remain fully stowed (i.e. issue occurred before lanyard drive would have even started).

Your conclusion is premature. The only thing that has been determined is that there was negligent risk of sudden deploy of the array during approach, capture and berthing. Everything else, including the cause of the failure, is still being looked into.
We know from the Lucy failure that unfurling of the gores partially completed before the deployment motor stalled (and we know from subsequent analyses that the stalling was due to the deployment tether slipping the hub and wrapping the shaft). We also know from the photos of Cygnus upthread that the gores have not started deployment at all, and that the array is not in the correct angle to begin unfurling: look at the deployed array, the two clasped plates at its 'base' perpendicular to the solar cells are the same orientation that the undeployed array would need to move to before it can begin unfurling the gores (as the orientation motion is perpendicular to those hard plates).

The failure that occurred with Lucy's array deployment was in a stage of the deployment sequence that the Cygnus array has not yet reached.
« Last Edit: 11/09/2022 02:29 pm by edzieba »

Online FutureSpaceTourist

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #252 on: 11/09/2022 02:46 pm »

Offline punder

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #253 on: 11/09/2022 05:41 pm »
Strange that no one seems interested in the wild attitude change we all saw in the launch animation--something on the order of 140 degrees pointing change. Nothing to see here, move along?   :o   ;D

Offline Sesquipedalian

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #254 on: 11/09/2022 05:41 pm »
Your conclusion is premature. The only thing that has been determined is that there was negligent risk of sudden deploy of the array during approach, capture and berthing. Everything else, including the cause of the failure, is still being looked into.

You mean, a negligible risk?  A negligent risk rather changes the meaning...

Offline eeergo

Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #255 on: 11/09/2022 05:47 pm »
Strange that no one seems interested in the wild attitude change we all saw in the launch animation--something on the order of 140 degrees pointing change. Nothing to see here, move along?   :o   ;D

We discussed it at length upthread. I also noticed a large spike in the X velocity chart (clearly a glitch, as it was going to orbital velocities briefly!) which seemed to coincide with the maneuver. We just don't have more information for now to do speculate further.
-DaviD-

Online FutureSpaceTourist

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #256 on: 11/09/2022 09:29 pm »
https://twitter.com/stephenclark1/status/1590455363840933889

Quote
In a press release, Northrop Grumman says the Cygnus spacecraftís solar array deployment failure on NG-18 stemmed from a problem during a stage separation event on launch.

An acoustic blanket from the Antares rocket lodged in one of the Cygnus solar array mechanisms.

Quote
"During a rocket stage separation event, debris from an Antares acoustic blanket became lodged in one of the Cygnus solar array mechanisms, preventing it from opening," said Cyrus Dhalla, vice president and general manager, Tactical Space Systems, Northrop Grumman. "Successful berthing was achieved thanks to Cygnus's robust design and the resilience and ingenuity of the NASA and Northrop Grumman teams."
« Last Edit: 11/09/2022 09:30 pm by FutureSpaceTourist »

Online FutureSpaceTourist

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #257 on: 11/09/2022 09:32 pm »
As discussed on this thread:

https://twitter.com/planet4589/status/1590455996891254788

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But why did the blanket separate? Was there a deeper anomaly in the stage separation (like the attitude error some have suggested from watching the webcast) ??

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #258 on: 11/09/2022 10:02 pm »
https://twitter.com/nasa_wallops/status/1590477832253329409

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Cargo resupply to the @Space_Station? ✅

Check out more photos from the Monday, Nov. 7, @northropgrumman #CRS18 launch carrying the Cygnus spacecraft full of supplies to the station. go.nasa.gov/3G6L3b5

Offline AS_501

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Re: Antares : Cygnus NG-18 : 7 Nov 2022 (10:32 UTC)
« Reply #259 on: 11/09/2022 10:17 pm »
Is Cygnus powered down during it's stay at the ISS, with power drawn from the station?
Launches attended:  Apollo 11, ASTP (@KSC, not Baikonur!), STS-41G, STS-125, EFT-1, Starlink G4-24, Artemis 1
Notable Spacecraft Observed:  Echo 1, Skylab/S-II, Salyuts 6&7, Mir Core/Complete, HST, ISS Zarya/Present, Columbia, Challenger, Discovery, Atlantis, Dragon Demo-2, Starlink G4-14 (8 hrs. post-launch), Tiangong

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