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The Mission




Orbiter: Discovery
Mission: STS-116
Launch: Dec. 9, 2006
Time: 8:47 p.m. EST
Site: Pad 39B, Kennedy Space Center, Florida
Landing: Dec. 22 @ 5:32 p.m. EST
Site: Shuttle Landing Facility, KSC

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Shuttle countdown on track
BY WILLIAM HARWOOD
STORY WRITTEN FOR CBS NEWS "SPACE PLACE" & USED WITH PERMISSION
Posted: December 5, 2006

The shuttle Discovery's countdown is proceeding smoothly toward blastoff Thursday, engineers said today. Forecasters now predict a 70 percent chance of good weather for NASA's first night launching since the 2003 Columbia disaster.

The countdown began at 11 p.m. Monday and engineers are gearing up to fill the shuttle's internal tanks with liquid oxygen and hydrogen this evening to power the ship's three electricity producing fuel cells.

"Our systems currently are in great shape, the countdown is progressing and we have no issues of consequence," said NASA Test Director Steve Payne. "The teams are ready and we're looking forward to an incredible mission of space shuttle Discovery and a safe and successful landing."

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Video coverage for subscribers only:
VIDEO: THIS MORNING'S COUNTDOWN STATUS REPORT PLAY
VIDEO: LAUNCH COUNTDOWN BEGINS TICKING PLAY
MORE: STS-116 VIDEO COVERAGE
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Discovery is scheduled for liftoff at 9:35:47 p.m. EST Thursday on a complex three-spacewalk mission to re-wire the international space station. The only question mark as of this writing is the weather, with forecasters calling for a 30 percent chance of low clouds behind a front that might block an on-time liftoff.

The odds worsen to 60 percent no-go for launch attempts Friday and Saturday, primarily due to low clouds and high winds. Shuttle weather officer Kathy Winters said the long-range outlook beyond Saturday is generally favorable, although winds will remain a concern next week.

The weather at emergency runways in California and New Mexico is expected to be favorable Thursday, Friday and Saturday and at least one emergency runway will be available all three days in Spain and France.

"Overall, the first day is the best day weather wise and the TAL sites look good all three days," Winters said. "So our main concern will just be the ceilings on launch day and then the winds the following two days."

This will be NASA's third flight this year and its first night launch since 2002. Payne said the launch team is eager to resume more normal launch operations after three years of recovery.

"We're getting more comfortable with being able to do this on a more regular basis," he said. "We came here to launch, this is what we do for a living, this is what we like to do. So getting to do it more often is exciting for most of us. It's a lot more fun doing launches than doing the in-between parts. So we're very happy to be here and we're eager to be here on Thursday night and get this launch in the air."

NASA managers are reviewing the status of Discovery's launch processing and will brief reporters later today.

Spaceflight Now Plus
Video coverage for subscribers only:
VIDEO: POST-ARRIVAL COMMENTS FROM THE CREW PLAY
VIDEO: ASTRONAUTS ARRIVE IN WAVE OF T-38 JETS PLAY
VIDEO: BIOGRAPHIES OF THE DISCOVERY ASTRONAUTS PLAY
VIDEO: NARRATED STS-116 MISSION PREVIEW MOVIE PLAY

VIDEO: WEDNESDAY'S SHUTTLE BRIEFING IN ITS ENTIRETY PLAY

BRIEFING SOUNDBITES:
VIDEO: THE ISSUES DISCUSSED AT FRR PLAY
VIDEO: NOT YOUR FATHER'S FRR PLAY
VIDEO: READY TO RESUME NIGHT LAUNCHES PLAY
VIDEO: LAUNCH PREPS PROCEEDING WELL PLAY
VIDEO: YEAR-END ROLLOVER CONCERNS PLAY
VIDEO: REASSESSING TANK FOAM RISK PLAY
VIDEO: STATION SOLAR ARRAY DRIVE SYSTEM PROBLEM PLAY
VIDEO: PRESSURIZATION PRECAUTIONS AT THE PAD PLAY

VIDEO: OVERVIEW OF STS-116 MISSION PLAY
VIDEO: SHUTTLE/ISS PROGRAM PERSPECTIVE PLAY
VIDEO: PREVIEW OF MISSION'S SPACEWALKS PLAY
VIDEO: ASTRONAUTS' PRE-FLIGHT NEWS BRIEFING PLAY

VIDEO: COVERAGE OF PRACTICE COUNTDOWN ACTIVITIES PLAY

VIDEO: DISCOVERY ROLLS TO THE PAD PLAY
VIDEO: DISCOVERY MATED TO TANK AND BOOSTERS PLAY
VIDEO: SHUTTLE HOISTED VERTICALLY INSIDE VAB PLAY
VIDEO: DISCOVERY HAULED FROM HANGAR TO VAB PLAY
VIDEO: PORT 5 TRUSS PAYLOAD PACKED UP PLAY
VIDEO: CREW VISITS KENNEDY SPACE CENTER PLAY
VIDEO: EXTERNAL FUEL TANK MATED TO BOOSTERS PLAY
MORE: STS-116 VIDEO COVERAGE
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