Dragon Launches Successfully, But Suffers Anomaly After Reaching Orbit
Screenshot from NASA TV of the launch of the Falcon 9 rocket carrying the Dragon capsule for a resupply mission to the International Space Station.
Just after 10 am Eastern time, the SpaceX successfully launched Dragon capsule on a second resupply mission to the International Space Station. The launch, rocket stage and spacecraft separations went perfectly, but the Dragon experienced an anomaly at about the time the solar arrays should have deployed. The SpaceX webcast announced that the spacecraft experienced a problem and then ended the webcast. NASA TV has not offered information either. We’ll provide more information as soon it becomes available.
Update: (10:44 EST) Elon Musk, SpaceX CEO just tweeted: “Issue with Dragon thruster pods. System inhibiting 3 of 4 from initializing. About to inhibit override.” Then minutes later he added, “Holding on solar array deployment until at least two thruster pods are active.”
Dragon carries 18 Draco thrusters for attitude control and maneuvering, so there may be an issue with those. Dragon’s thruster problem may be preventing the spacecraft from going into array deploy attitude, thus preventing array deploy.
Only time will tell if this is a software or hardware problem. The SpaceX press kit describes what needs to happen for solar array deploy:
Dragon separates from Falcon 9’s second stage, and seconds later, Dragon will reach its preliminary orbit. It then deploys its solar arrays and begins a carefully choreographed series of Draco thruster firings to reach the space station.
If Dragon can’t make it to the ISS, then it would need to be decided if and how it can return back to Earth on a good trajectory with limited thruster control.
The SpaceX controllers are obviously working to try and resolve the problem.
Update: 11:10 EST An update from NASA TV at about 11:10 am, said saying that part of response to problem with Dragon may be reorganizing the burn sequences in order for the spacecraft to be able to approach to the ISS. Musk just tweeted: “About to pass over Australia ground station and command inhibit override.”
Update: 11:25 EST: A statement from SpaceX says that “One thruster pod is running. Two are preferred to take the next step which is to deploy the solar arrays. We are working to bring up the other two in order to plan the next series of burns to get to station.”
Here’s the launch video from launch to separation (note, the separation video is spectacular!):
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© nancy for Universe Today, 2013. |
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Post tags: Commercial Space, Dragon, Falcon 9, SpaceX
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