Aero 版 (精华区)
发信人: cajn (cajn), 信区: Aero
标 题: (哥伦比亚)Mission Control Center Status Report #2
发信站: 哈工大紫丁香 (Tue Feb 4 15:25:03 2003) , 转信
Mission Control Center Status Report #21
STS-107 Accident Response
Monday, Feb. 3, 2003-8:00 pm CST
NASA engineers continued to review data and recover debris from the Space Shut
tle Columbia today as the analysis of what caused the orbiter to break up Satu
rday en route to landing continued.
Space Shuttle Program Manager Ron Dittemore told an afternoon briefing that se
veral teams of engineers are making progress in their study of data and video
from Columbia's launch and entry, but cautioned that it is a "massive job" req
uiring round-the-clock efforts to piece together the events that led to a loss
of communications with the Shuttle over north central Texas 16 minutes prior
to touchdown.
Still, Dittemore said NASA would pause Tuesday for a memorial ceremony at the
Johnson Space Center at 1:00 p.m. EST to honor the lives and the memory of Col
umbia's astronauts, Rick Husband, William McCool, Dave Brown, Kalpana Chawla,
Mike Anderson, Laurel Clark and Ilan Ramon. President and Mrs. Bush will join
NASA Administrator Sean O'Keefe at JSC for the memorial which is closed to the
public, but which will be broadcast on NASA Television.
Dittemore said the memorial represents an opportunity to take time to remember
the sacrifice of the astronauts, to mourn them and to "remember our friends."
Dittemore offered additional and refined information regarding the timeline of
events that led to Columbia's breakup on Saturday (all times CST):
At 7:52 a.m. CST, three-left main gear brake line temperature sensors showed a
n unusual rise in the left wheel well area.
At 7:53 a.m., a fourth left brake line strut actuator temperature sensor showe
d a 30-40 degree rise in temperature over a five-minute period, slightly highe
r than reported yesterday.
At 7:55 a.m., A fifth left brake line main gear sensor showed a sharp rise in
temperature.
At 7:57 a.m., left wing temperature sensors failed "off-scale low", meaning no
further data was being received on the ground.
And at 7:59 a.m., just before communications was lost with Columbia, there was
evidence of drag on the aerosurfaces of the left wing, causing two out of fou
r yaw steering jets in that area of the Shuttle to fire for 1.5 seconds to cou
nteract the increased drag.
Dittemore said more time will be needed to retrieve an additional 32 seconds o
f data acquired by ground computers after communications was lost with Columbi
a to see if it is useful to the inquiry. He said engineers would go directly t
o the Tracking and Data Relay Satellite System ground station hub in White San
ds, New Mexico to collect and analyze that data in its pristine form.
Although the investigative teams have a "high interest" in the left hand wheel
well area of Columbia, Dittemore cautioned that a temperature increase there
does not indicate that a structural problem occurred as a factor in the vehicl
e's breakup. In fact, Dittemore said the data suggests that "something else" m
ay have been happening at the time, not indicative of a structural breach.
Responding to inquiries regarding a piece of foam insulation which fell off Co
lumbia's external fuel tank about 80 seconds after launch that struck the left
wing of the Shuttle, Dittemore said imagery analysis showed that the foam mea
sured about 20 inches by 16 inches by 6 inches and weighed about 2.67 pounds.
He reiterated that engineering analysis conducted during the flight concluded
for NASA managers that although the foam might have caused some structural dam
age to the wing area, it would not have been sufficient to cause a catastrophi
c event.
"There is some other missing link contributing to this event," Dittemore said.
We are extremely interested in seeing any debris that may have fallen upstrea
m of the main impact area," referring to any additional debris which might be
recovered in an area to the west of Texas.
Earlier today, former President George H.W. Bush and Mrs. Barbara Bush visited
the International Space Station flight control room at the Johnson Space Cent
er, Houston, TX to pay their respects to the flight controllers and to the Exp
edition 6 crew aboard the orbital complex.
The former president told Expedition 6 Commander Ken Bowersox, Flight Engineer
Nikolai Budarin and NASA ISS Science Officer Don Pettit that President Bush r
elayed his "full confidence in the space program" in a conversation with the e
lder Bush Sunday. The former president told the crew the men and women of NASA
were showing "great courage" in the wake of the accident.
Bowersox, Budarin and Pettit spent the day preparing for the docking of a Russ
ian Progress resupply vehicle to the ISS Tuesday at 9:50 a.m. EST. The new car
go ship, which contains a ton of food, fuel and supplies for the crew, was suc
cessfully launched Sunday from the Baikonur Cosmodrome in Kazakhstan. NASA TV
coverage of the Progress docking to the ISS begins at 9 a.m. CST Tuesday.
The next STS-107 Accident Response briefing will be held on Tuesday, Feb. 4 at
NASA Headquarters in Washington at 4:30 p.m. EST. Status reports will be issu
ed as developments warrant.
NASA TV is on AMC-2, Transponder 9C, vertical polarization at 85 degrees west
longitude, 3880 MHz, with audio at 6.8 MHz.
--
※ 来源:.哈工大紫丁香 http://bbs.hit.edu.cn [FROM: 202.118.228.93]
Powered by KBS BBS 2.0 (http://dev.kcn.cn)
页面执行时间:3.695毫秒