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Discovery heads for predawn touchdown in Florida
BY WILLIAM HARWOOD
STORY WRITTEN FOR CBS NEWS "SPACE PLACE" & USED WITH PERMISSION
Posted: August 7, 2005; Updated with quotes from entry flight director

Shuttle commander Eileen Collins and pilot James Kelly tested Discovery's re-entry systems today while their crewmates packed up for landing Monday at the Kennedy Space Center. With forecasters predicting good weather, entry flight director LeRoy Cain said his team is psyched up and ready for NASA's first shuttle re-entry since Columbia disintegrated over Texas two-and-a-half years ago.

"It's great to be here. We've looked forward to this for a long time, we've looked forward to this mission for a long time, we've had a great test flight, we've learned a lot about the vehicle and as you know, in the past couple of years we've learned a lot about ourselves," Cain told reporters early today.

"There's been a lot of good change. We're looking forward, we're not looking back. The team is in great spirits, we're all very excited and anxious. We will come in and we'll do the job tomorrow just like we'd do on any entry and landing day."

Aboard Discovery, Collins and Kelly fired up one of the shuttle's hydraulic power units early this morning, moved the ship's big rudder, checked the operation of cockpit displays and test-fired 38 maneuvering jets to make sure all of the shuttle's critical re-entry systems are operational.

A few hours later, flying into sunlight 220 miles above the still-dark Florida landing site, Discovery and the international space station put on a spectacular pre-dawn show, passing close by brilliant Mars with the shuttle leading the brighter lab complex by about 20 degrees, or the width of two fists held at arm's length.

Cain said Discovery's systems checked out normally and that he weather appeared ideal with scattered clouds, light winds and only a slight chance of off-shore rain.

Assuming the forecast holds up, Collins plans to fire Discovery's twin orbital maneuvering system braking rockets for three minutes and 12 seconds starting at 3:39:43 a.m. Monday, slowing the ship by 220 mph and dropping the far side of its orbit deep into the atmosphere over Florida's East Coast.

Flying along a southwest-to-northeast trajectory, Discovery will pass above Central America, the Gulf of Mexico and the west coast of Florida near Tampa as it glides toward touchdown at the Kennedy Space Center. Landing is expected around 4:46:44 a.m. Monday, closing out a 13-day voyage spanning 5.3 million miles and 201 complete orbits since blastoff July 26.

Cain served as ascent-and-entry flight director for Columbia's final voyage. He was asked today whether he might be nervous during Monday's descent.

"Butterflies? If I came in to do an entry and landing on this flight or any flight and I didn't' have butterflies in my stomach, I'd probably turn around and go back outside and find somebody else to do the job, quite frankly," he said. "I consider that to be part of my own personal preparation process. There are a lot of things to think about, a lot of things to worry about and that's what I get paid to do, is to worry. And I do it a lot. So quite honestly, if I didn't feel that way I'd be concerned that I wasn't in the right frame of mind."

Asked if his flight control team might be distracted by memories of Columbia, Cain said "we're ready."

"We've practiced this hundreds of times, literally hundreds of times, and this is one of the most capable teams I've been associated with personally in my 17 years of flight control," he said. "I will let them know I have complete confidence in them to do the job and that we're ready to execute and we will be very focused, I can guarantee that."

Because the forecast for California's Edwards Air Force Base is good for several days, Cain does not plan to activate the backup landing site Monday and will focus instead on getting Discovery back on the ground in Florida.

Along with costing about $5 million in added work, a landing in California would eliminate any chance of launching the next shuttle mission in late September even if NASA solves its external tank foam problem. The shuttle Atlantis only has a four-day launch window and if Discovery is diverted to California, workers likely would not have enough time to prepare that shuttle for launch on a possible rescue mission.

In any case, Collins and company have two Florida landing opportunities Monday, one at 4:47 a.m. and the other one orbit later at 6:22 a.m.

"We're just calling up KSC for tomorrow," astronaut Ken Ham radioed Discovery from mission control early today. "So barring any unforeseen failures, that's all we're looking at for tomorrow. The weather at the Cape, the official forecast is few (clouds) at 2,500 (feet), few at 10,000, scattered at 25,000 with good visibility. The winds are light and pretty much variable, mostly out of the west-northwest. There is a call out for a slight chance of rain showers within 30 (nautical miles) and those are mostly out over the Gulf stream and fairly light.

"The weather for tomorrow should be fairly similar to what we saw today and the day prior. If you were to have come home today, you would have been go for the deorbit burn. So we're looking like a pretty favorable condition for the Cape tomorrow. Additionally, for weather out west, Edwards looks good for now and for the foreseeable future, for the next few days anyway, looks fairly good in case we need to go that direction for Tuesday."

"We can't think of any questions," Collins replied. "Sounds like really great weather."

"Yeah, we're looking forward to it."

If the weather or some other problem blocks both Monday opportunities, Cain will keep Discovery in orbit an extra day, activate the backup landing site at Edwards and bring the ship down on one coast or the other Tuesday.

Cain said today many shuttle commanders prefer night landings over day entries because of the visibility of the brightly illuminated runway at Kennedy. He said it didn't matter one way or the other to Collins, who he described as "one of the most skilled and capable pilots that I've been associated with."

"She is very conscientious, she and I have sat down and talked a great deal about this entry and landing and so I am keenly aware of what her capabilities are as well as the other members of my team who are responsible in part for helping me figure out the best opportunities to present to the team from a deorbit and landing standpoint.

"I have complete confidence in Eileen's capability," he said. "Quite frankly, she's capable of landing the shuttle in conditions that are way beyond what I'm willing to put her in."

Here are all possible landing times for Monday through Wednesday, including targets for White Sands, N.M. (in EDT)



ORBIT...DEORBIT......LANDING...SITE

Monday, Aug. 8

201.....03:40 AM.....04:47 AM...Kennedy Space Center
202.....05:15 AM.....06:22 AM...Kennedy Space Center

Tuesday, Aug. 9

217.....04:05 AM.....05:08 AM...Kennedy Space Center
218.....05:37 AM.....06:39 AM...White Sands, NM
218.....05:41 AM.....06:43 AM...Kennedy Space Center
219.....07:11 AM.....08:13 AM...Edwards AFB, CA
219.....07:13 AM.....08:14 AM...White Sands, NM
220.....08:47 AM.....09:48 AM...Edwards AFB, CA

Wednesday, Aug. 10

232.....02:50 AM.....03:53 AM...Kennedy Space Center
233.....04:25 AM.....05:28 AM...Kennedy Space Center
234.....05:55 AM.....06:58 AM...Edwards AFB, CA
234.....05:57 AM.....06:59 AM...White Sands, NM
235.....07:31 AM.....08:32 AM...Edwards AFB, CA
235.....07:33 AM.....08:34 AM...White Sands, NM

Here is a detailed landing timeline for the first opportunity into Kennedy. Major milestones from Columbia's last re-entry are provided as a reference for readers who might not recall the timing of major events. Columbia entry data is keyed to minutes and seconds after entry interface, the moment the shuttle reaches the discernible atmosphere at an altitude of 400,000 feet. These data are provided for reference only.


EDT...........EVENT

11:39 PM......Begin deorbit timeline
11:54 PM......Payload bay radiator stow
12:04 AM......Mission specialists seat installation
12:10 AM......Computers set for deorbit prep
12:14 AM......Hydraulic system configuration
12:39 AM......Flash evaporator cooling system checkout
12:45 AM......Final payload deactivation
12:59 AM......Payload bay doors closed
01:09 AM......Mission control 'go' for OPS-3 software transition
01:19 AM......OPS-3 entry software loaded
01:44 AM......Entry switchlist verification
01:54 AM......Deorbit maneuver update
01:59 AM......Crew entry review
02:14 AM......Collins and Kelly don pressure suits
02:31 AM......Inertial measurement unit alignment
02:39 AM......Collins and Kelly strap in; crewmates don pressure suits
02:56 AM......Shuttle steering check
02:59 AM......APU hydraulic power unit prestart
03:06 AM......Toilet deactivation
03:14 AM......Vent doors closed for entry
03:19 AM......Mission control 'go' for deorbit burn
03:25 AM......All other crew members strap in
03:35 AM......TDRS-West comsat acquisition of signal
03:34 AM......Single APU start
	
03:39:43 AM...Deorbit ignition (burn duration: 3:12; velocity change: 220
mph)
03:42:55 AM...Deorbit burn complete

04:15:07 AM...Entry interface (shuttle in discernible atmosphere)

04:19:37 AM...STS-107: EI+04:30 - 1st unusual data recorded
04:19:57 AM...STS-107: EI+04:50 - 1st unusual heating noted

04:20:07 AM...1st roll command to left

04:21:51 AM...STS-107: EI+06:44 - Start of peak heating
04:31:03 AM...STS-107: EI+15:56 - Last valid data
04:31:51 AM...STS-107: EI+16:44 - End of peak heating

04:33:26 AM...1st left-to-right roll reversal
04:40:22 AM...Velocity less than Mach 2.5
04:42:32 AM...Velocity less than Mach 1
04:43:26 AM...Shuttle banks and turns to line up on runway
04:46:44 AM...Landing

Earlier today, Collins and her crewmates fielded questions from reporters on Earth in a final round of media interviews.

Wendy Lawrence, who operated the space station's robot arm during three spacewalks and who helped orchestrate the station's resupply, told CBS News the mission was "the busiest flight I've ever been on."

"I think this crew has done extremely well in that regard. And of course, there are thousands of people on the ground who made this mission successful. Thanks to them and their great planning, we've been able to pull off a very, very heavy workload. I've had some email from friends who said 'you all have made it look so easy.' But that has not been the case. It's been a challenging mission, a difficult one, and the real tribute is to the folks on the ground who helped us be very, very successful on orbit."

Said Charles Camarda, "I think as a test flight it was very successful. We evaluated several different (heat-shield damage detection) sensor systems, we've even done a repair, I think we far exceeded what we would have expected for this flight. We collected a lot of data, there's a lot more to be done and when we get back to the ground, I'm sure people will continue to work until we have (certified heat-shield) repair techniques and we feel comfortable that we've completely fixed the (foam on the external fuel) tank."

Discovery's flight took on a "Perils of Pauline" sort of tone with concern about foam debris shedding during launch, the potential threat posed by gap fillers extending from the shuttle's belly and last-minute worries about a damaged insulation blanket just below commander Eileen Collins' left window.

With every possible problem being subjected to detailed analysis and debate, some observers have suggested NASA may be faced with "analysis paralysis" and that the post-Columbia safety pendulum may have swung too far. But Kelly disagreed, saying "I think just the fact that we're here means we don't have paralysis by analysis."

"I think the folks on the ground have done an absolutely great job trying to take care of everything they possibly can take care (of) without flying the flight," he told CBS News. "The fact that we're up here now talking to you (shows that) did not happen and hopefully, that won't happen after this flight. We've got a lot of data we need to reduce and take care of and figure out and some change will have to be made before we fly STS-121 (the next shuttle flight). But I think we're on our way there."

Astronaut Andrew Thomas agreed.

"I hope the legacy will be that we've shown we've been able to return the vehicle back to safe, operational flight," he said. "I think we've also shown that we don't have a full, complete understanding of the aerothermal dynamics of what happens around the tank during the launch phase and it's shown us that we need to do that."

Japanese astronaut Soichi Noguchi told his family, "See you tomorrow. It's been a great trip and we'll come back with lots of good stories."

Spaceflight Now Plus
Additional coverage for subscribers:
VIDEO: SATURDAY MISSION STATUS DIAL-UP | BROADBAND 1 & 2
AUDIO: LISTEN TO THE STATUS BRIEFING MP3 FILE

VIDEO: FAREWELL CEREMONY BETWEEN SHUTTLE AND ISS CREWS PLAY
VIDEO: DISCOVERY UNDOCKS FROM STATION AS SEEN LIVE PLAY
VIDEO: SHUTTLE FLIES ABOVE STATION DURING FLYAROUND PLAY
VIDEO: STUNNING VIEW OF STATION WITH EARTH'S LIMB PLAY

VIDEO: FRIDAY MISSION STATUS BRIEFING DIAL-UP | BROADBAND
VIDEO: CONGRESSIONAL LEADERS CALL ASTRONAUTS PLAY
VIDEO: CARGO MODULE RETURNED TO DISCOVERY PAYLOAD BAY PLAY

VIDEO: COMBO MISSION STATUS/MANAGEMENT BRIEFING DIAL-UP |
   BROADBAND PART 1 & 2

VIDEO: WED. MANAGEMENT NEWS BRIEFING DIAL-UP | BROADBAND 1 & 2
VIDEO: WEDNESDAY'S MISSION STATUS DIAL-UP | BROADBAND 1 & 2
VIDEO: SPACEWALKER REMOVES FIRST TILE GAP FILLER PLAY
VIDEO: SECOND GAP FILLER PULLED OUT AS SEEN VIA HELMETCAM PLAY
VIDEO: LONGER-LENGTH MOVIE OF SECOND GAP FILLER REMOVAL PLAY

VIDEO: BEHIND THE SCENES INSIDE MISSION CONTROL PLAY

VIDEO: SPACEWALKER FLOATS OUT OF AIRLOCK TO BEGIN EVA PLAY
VIDEO: STOWAGE PLATFORM MOUNTED TO STATION EXTERIOR PLAY
VIDEO: HELMETCAM VIEW OF EXPERIMENT INSTALLATION PLAY
VIDEO: NOGUCHI DEPLOYS THE EXPERIMENT PACKAGE PLAY
VIDEO: STUNNING HELMETCAM VIEW FROM ATOP THE STATION PLAY
VIDEO: SPACEWALKERS RETURN TO AIRLOCK AT EVA'S END PLAY

VIDEO: PRESIDENTIAL PHONE CALL PLAY
VIDEO: ASTRONAUT DAVE WOLF EXPLAINS GAP FILLER REMOVAL PLAY
VIDEO: TUESDAY'S CREW NEWS CONFERENCE DIAL-UP | BROADBAND
VIDEO: JAPANESE MEDIA EVENT (WITH TRANSLATION) PLAY
VIDEO: RUSSIAN MEDIA EVENT (WITH TRANSLATION) PLAY
VIDEO: TUESDAY'S STATUS BRIEFING DIAL-UP | BROADBAND 1 & 2

VIDEO: DECISION ANNOUNCED AT BRIEFING DIAL-UP | BROADBAND 1 & 2
VIDEO: GROUND TESTS ON PULLING, CUTTING GAP FILLERS PLAY

VIDEO: ASTRONAUTS PREPARE FOR THE SPACEWALK PLAY
VIDEO: FAILED GYRO IS REMOVED FROM THE STATION PLAY
VIDEO: THE NEW GYRO IS INSTALLED PLAY
VIDEO: SPACEWALKERS POSE FOR PICTURES PLAY
VIDEO: MONDAY'S STATUS BRIEFING DIAL-UP | BROADBAND 1 & 2
VIDEO: BEHIND THE SCENES IN MISSION CONTROL DURING EVA PLAY

VIDEO: MANAGEMENT TEAM UPDATE DIAL-UP | BROADBAND 1 & 2
VIDEO: SUNDAY'S MISSION STATUS DIAL-UP | BROADBAND
AUDIO: LISTEN TO THE STATUS BRIEFING MP3 FILE
VIDEO: LEFT-HAND BOOSTER SEPARATION FROM TANK PLAY
VIDEO: LEFT-HAND BOOSTER CHUTE DEPLOY AND SPLASHDOWN PLAY
VIDEO: FULL CLIP FROM LEFT-HAND BOOSTER PLAY
VIDEO: RIGHT-HAND BOOSTER SEPARATION FROM TANK PLAY
VIDEO: RIGHT-HAND BOOSTER SPLASHDOWN PLAY
VIDEO: FULL CLIP FROM RIGHT-HAND BOOSTER PLAY
VIDEO: MANAGEMENT TEAM UPDATE DIAL-UP | BROADBAND
VIDEO: FRIDAY'S MISSION STATUS DIAL-UP | BROADBAND PART 1
AUDIO: LISTEN TO THE STATUS BRIEFING MP3 FILE
VIDEO: DAMAGE ASSESSMENTS BRIEFING DIAL-UP | BROADBAND 1 & 2
VIDEO: THURSDAY MISSION STATUS BRIEFING PLAY
  BROADBAND VERSION: PART 1 & PART 2
AUDIO: LISTEN TO THE MISSION STATUS BRIEFING MP3 FILE
VIDEO: BEHIND THE SCENES IN MISSION CONTROL FOR DOCKING PLAY
VIDEO: SHUTTLE CREW WELCOMED ABOARD THE STATION PLAY
VIDEO: COMMANDER COLLINS GUIDES DISCOVERY TO DOCKING PLAY
VIDEO: DISCOVERY'S BACKFLIP AS SEEN FROM STATION PLAY
VIDEO: STATION CAMERAS SEE SHUTTLE'S APPROACH FROM BELOW PLAY
VIDEO: SHUTTLE PULLS IN FRONT OF STATION FOR DOCKING PLAY

VIDEO: CREW'S CAMCORDER VIDEO OF JETTISONED FUEL TANK PLAY

VIDEO: NASA GROUNDS SHUTTLE PROGRAM DIALUP
  BROADBAND VERSION: PART 1 & PART 2
AUDIO: LISTEN TO PROGRAM NEWS CONFERENCE FOR IPOD
VIDEO: WEDNESDAY MISSION STATUS BRIEFING DIAL-UP | BROADBAND
VIDEO: SHUTTLE FUEL TANK HITS BIRD AT LIFTOFF PLAY

VIDEO: AMAZING WB-57 AERIAL LAUNCH VIDEO NORTH | SOUTH PLANE
VIDEO: BEHIND THE SCENES IN MISSION CONTROL AT LAUNCH PLAY
VIDEO: OFFICIALS DESCRIBE DEBRIS EVENTS DIAL-UP | BROADBAND
AUDIO: LISTEN TO THE DEBRIS DESCRIPTION FOR IPOD

VIDEO: LAUNCH OF DISCOVERY! SHORTER | LONGER
VIDEO: FOOTAGE OF OBJECT BREAKING FREE FROM TANK PLAY
VIDEO: TANK-MOUNTED CAMERA SHOWS ENTIRE LAUNCH SMALL | LARGE
VIDEO: ONBOARD CAMERA VIEW OF TANK SEPARATION PLAY
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