CAPE
CANAVERAL, Fla. — NASA's space shuttle Atlantis is ready for a Thursday space shot
attempt, mission managers said today.
Atlantis is
slated to launch the seven-astronaut crew of the STS-122 mission into space from
Kennedy Space Center (KSC) on Thursday. Doug Lyons, launch director for
the mission, said he's hopeful for an attempt at 2:45 p.m. EST (1945 GMT) — fickle
Florida coast weather permitting,
of course.
"We're
all thinking that Thursday's the day, regardless of what the weather guy might
tell you," Lyons said. "We're
ready to make [the launch] happen."
LeRoy Cain,
chair of NASA's mission management team here at KSC, said he's confident problems are now
resolved with two fuel gauge-like sensors in the bottom of the shuttle's 15-story external fuel tank as
well as a kinked radiator hose in the payload bay of Atlantis. Engineers tracked the sensor glitch to a bad electrical connector and replaced it.
"We're
not working any issues," Cain said. "We're hoping it will stay that
way, of course, and we have some confidence that it will."
Cases
closed
Lyons said technicians will constantly test
the fuel gauge sensors, known as engine cutoff (ECO)
sensors, during fueling of the external fuel tank early Thursday morning.
"We'll
be keeping a close eye on our ECO sensors," Lyons said, noting that launch
should commence even if one of the four devices fails during testing.
The sensors
are designed to stop the three main engines of Atlantis before its 500,000 gallons
(1.9 million liters) of fuel runs dry. Because the cryogenic fuel runs through the
orbiter's engine cones and cools them as it is expelled and burned, running out
of fuel could cause catastrophic damage to the spacecraft, mission managers have said.
Cain said Atlantis' kinked
hose is now tucked back into it's intended place, but engineers are still
determining whether or not it could leak after the payload bay doors are opened
and again closed — a maneuver that could again cause it to bend outwards in a
stressed position.
"We're
a long ways from having a leak develop in this particular hose we have on
Atlantis," Cain said. But in the unlikely event of a leak, he explained,
the orbiter's computers would shut down the redundant radiator system before
Freon could leak out.
Anxious
for orbit
Navy
captain Stephen Frick will head the 11-day mission, the prime objective of
which is to deliver the European Space Agency's (ESA) bus-sized Columbus
laboratory to the International Space Station (ISS).
Alan
Thirkettle, space station program manager for the ESA, said he's pleased with
the work done by NASA to get Atlantis into orbit.
"From
an ESA point of view that we're very confident and very comfortable with the
design fixes ... since December," Thirkettle said. "It seems very, very
solid."
As mission
managers wait to see if the weather will shape up for a safe launch on
Thursday, Lyons said the astronauts are waiting in good spirits.
"They're
very anxious to get to launch day, get in orbit, and start their mission,"
Lyons said.
NASA
will broadcast Atlantis' STS-122 mission live on NASA TV. Click here for SPACE.com's
STS-122 mission coverage and NASA TV feed.
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