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Liftoff! Falcon at T-9
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#12
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Liftoff! Falcon at T-9
Jeff Findley writes:
The ground has commanded a "retreat" of Dragon from rendezvous with ISS. Not sure if it was planned (as a test?) or if something is wrong. Since I just "tuned in", I'm a bit clueless right now. ;-) It seems there was some discrepance between the LIDAR and thermal imager ranging going on for some time, leading to a bit of (previously unplanned) stop and go and analysing data earlier. Dragon stopped now at 72 meters. Decent live coverage going on at http://forum.nasaspaceflight.com/ind...opic=28970.300 Jochem -- "A designer knows he has arrived at perfection not when there is no longer anything to add, but when there is no longer anything to take away." - Antoine de Saint-Exupery |
#14
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Liftoff! Falcon at T-9
Jeff Findley writes:
The live audio says that the LIDAR picked up a "stray" return from a reflector on the JEM module. The reflector in question is not one which Dragon is supposed to be "looking at". Sounds like a classic "integration problem" which cropped up unexpectedly. Someone should go out and put some black tape over the bloody thing ;-) Jochem -- "A designer knows he has arrived at perfection not when there is no longer anything to add, but when there is no longer anything to take away." - Antoine de Saint-Exupery |
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Liftoff! Falcon at T-9
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#16
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Liftoff! Falcon at T-9
In article ,
says... In article , says... Jeff Findley writes: The live audio says that the LIDAR picked up a "stray" return from a reflector on the JEM module. The reflector in question is not one which Dragon is supposed to be "looking at". Sounds like a classic "integration problem" which cropped up unexpectedly. Someone should go out and put some black tape over the bloody thing ;-) That would be a good hardware solution, but a software solution should be faster to implement. ;-) SpaceX is going to "narrow the view" of their LIDAR, which should take the next 5 to 10 minutes. In other words, it's going to squint a bit and ignore the stray reflection. SpaceX is getting ready to command Dragon to resume its approach of ISS. Jeff -- " Ares 1 is a prime example of the fact that NASA just can't get it up anymore... and when they can, it doesn't stay up long. " - tinker |
#17
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Liftoff! Falcon at T-9
Jeff Findley writes:
SpaceX is going to "narrow the view" of their LIDAR, which should take the next 5 to 10 minutes. In other words, it's going to squint a bit and ignore the stray reflection. Well, it's called a test and demo flight for a reason. BTW, if you look at the data overlay on the ISS stream you can see the primary and secondary range on the bottom right (one is from LIDAR, the other from the thermal imager, don't know which is which). They're differing quite a few meters. Jochem -- "A designer knows he has arrived at perfection not when there is no longer anything to add, but when there is no longer anything to take away." - Antoine de Saint-Exupery |
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Liftoff! Falcon at T-9
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Liftoff! Falcon at T-9
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#20
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Liftoff! Falcon at T-9
In article ,
says... In article , says... Anyway, they're now holding at 30 meters below ISS. The purpose of the hold is to time rendezvous so that SSRMS capture can be made during a daylight pass. Cool stuff. Sounds like SpaceX is double checking the LIDAR settings for the approach to the 10 meter hold position, which is where SSRMS would capture Dragon. Dragon Capture! 9:56 a.m. EST. Lots of clapping and congratulations in mission control, Houston. Jeff -- " Ares 1 is a prime example of the fact that NASA just can't get it up anymore... and when they can, it doesn't stay up long. " - tinker |
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