26-March-2008, 09:50 PM
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Senior Member
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Join Date: Mar 2004
Posts: 10,374
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CBS News Space Place
Quote:
Update: Shuttle landing delayed one orbit
Florida's hard-to-predict weather surprised NASA forecasters today, forcing flight director Richard Jones to delay the shuttle Endeavour's re-entry by one orbit because of low clouds over the Kennedy Space Center. Shuttle commander Dominic Gorie and pilot Gregory Johnson are now setting up for a deorbit rocket firing at 7:33 p.m., which would result in a landing at 8:39 p.m.
[...]
"The forecast for the second opportunity is scattered (clouds) at 5,000," Dutton said. "So we're looking for some improvement."
There are no technical problems of any significance and the weather remains the only concern. If Gorie and his crewmates cannot get down on their second opportunity, the mission will be extended 24 hours and they will try again Thursday.
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Revised timeline:
Quote:
Rev. 249 descent to KSC runway 15
07:13:14 PM...Mission control 'go' for deorbit burn
07:19:14 PM...MS seat ingress
07:28:14 PM...Single APU start
07:33:14 PM...Deorbit ignition (alt: 216 sm; vel: 17,251 mph; dV: 206 mph; dT: 2:48)
07:36:02 PM...Deorbit burn complete
08:07:23 PM...Entry interface (alt: 75.6 sm; vel: 16,979 mph; range: 5,055 sm)
08:12:18 PM...1st roll command to right
08:21:14 PM...1st right-to-left roll reversal
08:26:00 PM...C-band radar acquisition
08:32:34 PM...Velocity less than mach 2.5 (alt: 83,900 feet; vel: 1,704 mph)
08:34:46 PM...Velocity less than mach 1 (alt: 50,700 feet; vel: 613 mph)
08:35:32 PM...Shuttle on the heading alignment cylinder
08:39:06 PM...Landing
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New landing target:
March 26 1739 PDT
March 26 2039 EDT
March 27 0039 UTC
2 hours 49 minutes to landing
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