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"930420.DFC" (27518 bytes) was created on 04-20-93
20-Apr-93 Daily File Collection
These files were added or updated between 19-Apr-93 at 21:00:00 {Central}
and 20-Apr-93 at 21:00:15.
=--=--=START=--=--= NASA Spacelink File Name:930420.REL
4/20/93: NASA SR-71 NOW A FLYING OBSERVATORY
Drucella Andersen
Headquarters, Washington, D.C. April 20, 1993
Don Nolan
Ames-Dryden Flight Research Facility, Edwards, Calif.
RELEASE: 93-071
NASA has modified a former Air Force reconnaissance aircraft
to conduct high- altitude astronomy studies at three times the
speed of sound.
The SR-71A "Blackbird," based at NASA's Ames-Dryden Flight
Research Facility, Edwards, Calif., made its first science flight
on March 9. In the plane's nose bay was an ultraviolet video
camera that studied stars and comets. Future flights will carry a
variety of instruments, including a fiber optics device and an
ultraviolet spectrometer.
"This really is a case of turning swords into plowshares,"
said Jacklyn Green, Project Scientist for the SR-71 science
research platform project at NASA's Jet Propulsion Laboratory
(JPL), Pasadena, Calif., which developed the experiments. "We are
taking what was once a spy plane and transforming it into a
useful, cost-effective science platform. This opens up a new
ultraviolet window for research."
During its first mission, the SR-71 climbed to just above
83,000 feet (25.3 kilometers), where scientists can observe stars
and planets at ultraviolet wavelengths that are blocked to ground-
based astronomers.
The SR-71 could perform several other experiments now in the
planning stage, such as infrared studies of the Aurora Borealis by
the University of California, Los Angeles Physics Department and
atmospheric science studies of specific pollutants in the
stratosphere.
"It's significant to the SR-71 program that the unique
capabilities of the aircraft are being viewed by the science
community as a platform for gathering data at high speeds and
altitudes. The SR-71 is the only aircraft that can meet their
needs," said Dave Lux, SR-71 Project Manager at Dryden.
NASA's three Blackbirds also may serve as platforms for
aeronautics studies in NASA's High-Speed Research Program.
"Boeing is investigating the possibility of using the SR-71 for
inlet testing with a subscale engine and supersonic riblet
testing, and McDonnell Douglas is interested in conducting sonic
boom studies," said Neil Matheny, Dryden point of contact for the
program.
The High Speed Research program is researching and developing
technology for a future environmentally friendly, economically
feasible high-speed civil transport. The program is a joint NASA-
industry effort led by NASA's Langley Research Center, Hampton,
Va.
- end -
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:930420.SHU
KSC SHUTTLE STATUS REPORT 4/20/93
KENNEDY SPACE CENTER SPACE SHUTTLE STATUS REPORT
Tuesday, April 20, 1993
KSC Contact: Bruce Buckingham
Mission: STS-55/SL-D2 Orbital Altitude: 184 miles
Vehicle: Columbia/OV-102 Inclination: 28.45 degrees
Location: Launch Pad 39-A Crew Size: 7
Mission Duration: 8 days/22 hours KSC Landing: May 3
Target Launch Date: April 24
Launch Window: 10:52 a.m. - 1:22 p.m.
IN WORK TODAY:
* Launch countdown preparations
* Aft engine compartment closeouts
* Spacelab trace contaminant purge
* Hypergolic stabilization
WORK SCHEDULED:
* Crew arrives at KSC 9:15 a.m. Wednesday
* Countdown begins 4:00 p.m. Wednesday
* Aft confidence test and closeouts (Wednesday)
WORK COMPLETED:
* Fuel cell storage tank purges
* Hydraulic systems tests
* Spacelab closeouts and final servicing of experiments
-----------------------------------------------------------------
Mission: STS-57/Spacehab/EURECA-Retrieval Orbital Alt.: 287 miles
Vehicle: Endeavour/OV-105 Inclination: 28 degrees
Location: Vehicle Assembly Building Crew Size: 6
Mission Duration: 7days/23 hours Target KSC Landing: May 27
Target Launch Date: May 19
IN WORK TODAY:
* Installation of main engines
* Orbiter hydraulic operations
WORK SCHEDULED:
* Heat shield installation
* Aft securing for rollout
* Rollout to pad 39-B targeted for Monday, April 26
WORK COMPLETED:
* Hydraulic fluid circulation and sample tests
-----------------------------------------------------------------
Up Mission: STS-51/ACTS/TOS
Down Mission: STS-56/ATLAS-2/SSBUV
Vehicle: Discovery/OV-103
Location: OPF bay 3
IN WORK TODAY:
* Orbiter hydraulic operations
* Access to aft engine compartment
* Install main engine locks
* Aft thruster inspections
WORK SCHEDULED:
* Open payload bay doors (Thursday)
* Payload bay door latch and functional tests (Thursday)
* Remove forward reaction and control system access panels
(Thursday)
* Remove SUVE payload (Friday)
* Remove Atlas and Spartan payloads (Monday)
WORK COMPLETED:
* Roll to OPF following landing at KSC on Saturday April 17
* Installation of payload bay door strongback
* Thruster inspections
# # # #
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:930420.SKD
Daily News/TV Sked 4/20/93
Daily News
Tuesday, April 20, 1993 Two Independence Square, Washington, D.C.
Audio Service: 202/358-3014
% Technicians continue to prepare Columbia;
% NASA SR-71...A Flying Observatory;
% Space Shuttle Endeavour Status;
Work continues at the Kennedy Space Center
to prepare Columbia for its upcoming STS-55
mission. The launch is targeted for April 24 at
10:52 a.m. EDT.
The nine day mission will carry 7 crew
members and the Spacelab D-2 payload.
Technicians are scheduled to complete the aft
engine compartment closeouts and continue
launch countdown preparations today.
The crew is scheduled to arrive at the Kennedy
Space Center Wednesday. Managers will begin
the countdown Wednesday as well.
* * * * * * * * * * * * * * * *
NASA is using a former Air Force
reconnaissance aircraft to perform high-
altitude astronomy studies at three times the
speed of sound. The SR-71A "Blackbird" based
at the Ames-Dryden Flight Research Facility in
the future will carry a variety of instruments,
including a fiber optic device and an
ultraviolet spectrometer.
During its first mission, the SR-71 climbed to
just above 83,000 feet (25.3 kilometers), which
allowed scientists to observe stars and planets
at ultraviolet wavelengths that were usually
unaccessible. The science community will be
able to gather data at high speeds and
altitudes. The SR-71 is the only aircraft that
will enable scientists to receive information in
this manner.
The SR-71 aircraft could also serve as a
platform for aeronautics studies in NASA's
High-Speed Research Program. The High-
Speed Research program is currently
researching and developing technology for
future environmentally friendly, economically
feasible high-speed civil transport.
* * * * * * * * * * * * * * * *
In preparation for Endeavour's upcoming STS-
57 mission, workers plan to install the main
engines and complete orbiter hydraulic
operations. Technicians plan to install the
heat shield and secure the aft for rollout.
Rollout is targeted for Monday, April 26.
* * * * * * * * * * * * * * * *
Here's the broadcast schedule for Public Affairs events on NASA
TV. Note that all events and times may change without notice and
that all times listed are Eastern. Live indicates a program is
transmitted live.
Tuesday, April 20, 1993
Noon NASA Today News
12:15 pm Aeronautics & Space Report
12:30 pm From Gondola to Space Flight
1:00 pm "Houston We Have a Satellite"
1:30 pm Jupiter Odyssey
1:00 pm NOVA: Earthquake
2:00 pm Possible Futures in Space
3:00 pm TQM: Bill A. Jackson
Wednesday, April 21, 1993
Noon NASA Today News
12:15 pm Aeronautics & Space Report
12:30 pm Progress in Aeronautics
1:00 pm Building Towards New Heights
1:30 pm Jupiter:A Clearer Picture
2:00 pm Kids in Space Science: The Shuttle
2:30 pm Life into Space
3:00 pm TQM: Milam Waters
NASA TV is carried on GE Satcom F2R, transponder 13,
C-Band, 72 degrees West Longitude, transponder frequency is 3960
MHz, audio subcarrier is 6.8 MHz, polarization is vertical.
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:930420A.REL
4/20/93: NASA TO HOLD ASTRONOMY, OZONE-RESULTS BRIEFINGS
Paula Cleggett-Haleim
Headquarters, Washington, D.C. April 20, 1993
Brian Dunbar
Headquarters, Washington, D.C.
Randee Exler
Goddard Space Flight Center, Greenbelt, Md.
EDITORS NOTE: N93-20
NASA will hold two press briefings on Thursday, April 22, to highlight
findings from the Compton Gamma Ray Observatory and the Mission to Planet Earth
Program.
The first press conference, scheduled for 11:30 a.m. EDT at the
Visitor's Center of the Goddard Space Flight Center (GSFC), Greenbelt, Md.,
will discuss record low global ozone levels observed in 1992. Information
presented in this briefing is embargoed until 6 p.m. Thursday, April 22.
Dr. James Gleason of Universities Space Research Association (USRA)
will discuss the results, scheduled to appear in the journal Science on Friday,
April 23. Also on the panel will be Dr. Rich McPeters, Nimbus-7 Project
Scientist, of GSFC; Dr. Richard Stolarski of GSFC; and Dr. Jim Miller of the
National Oceanic and Atmospheric Administration.
The second press conference, at 1 p.m. in the NASA Headquarters
Auditorium, Washington, D.C., will highlight new findings from NASA's Compton
Gamma Ray Observatory. The new findings, including the highest energy
gamma-rays ever recorded from a burst, challenge long-standing theories about
these bewildering bursts and question their origins.
Presenting the discoveries will be Dr. Brenda Dingus, USRA, Greenbelt,
Md., and Dr. Chryssa Kouveliotou, USRA, Huntsville, Ala. Commenting on the
significance of these discoveries will be Dr. Stan Woosley, Lick Observatory,
Santa Cruz, Calif.; Dr. Bruce Margon, University of Washington, Seattle, and
Dr. Steve Maran, GSFC.
This event will be carried live on NASA Select television, Satcom F-2R,
Transponder 13, located at 72 degrees West Longitude, frequency 3960.0 MHz,
audio 6.8 MHz. Questions will be taken from other NASA centers.
- end -
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:4_3_6_3.TXT
4/20/93: NASA SR-71 NOW A FLYING OBSERVATORY
Drucella Andersen
Headquarters, Washington, D.C. April 20, 1993
Don Nolan
Ames-Dryden Flight Research Facility, Edwards, Calif.
RELEASE: 93-071
NASA has modified a former Air Force reconnaissance aircraft
to conduct high- altitude astronomy studies at three times the
speed of sound.
The SR-71A "Blackbird," based at NASA's Ames-Dryden Flight
Research Facility, Edwards, Calif., made its first science flight
on March 9. In the plane's nose bay was an ultraviolet video
camera that studied stars and comets. Future flights will carry a
variety of instruments, including a fiber optics device and an
ultraviolet spectrometer.
"This really is a case of turning swords into plowshares,"
said Jacklyn Green, Project Scientist for the SR-71 science
research platform project at NASA's Jet Propulsion Laboratory
(JPL), Pasadena, Calif., which developed the experiments. "We are
taking what was once a spy plane and transforming it into a
useful, cost-effective science platform. This opens up a new
ultraviolet window for research."
During its first mission, the SR-71 climbed to just above
83,000 feet (25.3 kilometers), where scientists can observe stars
and planets at ultraviolet wavelengths that are blocked to ground-
based astronomers.
The SR-71 could perform several other experiments now in the
planning stage, such as infrared studies of the Aurora Borealis by
the University of California, Los Angeles Physics Department and
atmospheric science studies of specific pollutants in the
stratosphere.
"It's significant to the SR-71 program that the unique
capabilities of the aircraft are being viewed by the science
community as a platform for gathering data at high speeds and
altitudes. The SR-71 is the only aircraft that can meet their
needs," said Dave Lux, SR-71 Project Manager at Dryden.
NASA's three Blackbirds also may serve as platforms for
aeronautics studies in NASA's High-Speed Research Program.
"Boeing is investigating the possibility of using the SR-71 for
inlet testing with a subscale engine and supersonic riblet
testing, and McDonnell Douglas is interested in conducting sonic
boom studies," said Neil Matheny, Dryden point of contact for the
program.
The High Speed Research program is researching and developing
technology for a future environmentally friendly, economically
feasible high-speed civil transport. The program is a joint NASA-
industry effort led by NASA's Langley Research Center, Hampton,
Va.
- end -
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_18_5.TXT
NOTE: This file is too large {29679 bytes} for inclusion in this collection.
The first line of the file:
- Current Two-Line Element Sets #177 -
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_43_11.TXT
STS-55 LAUNCH WEATHER FORECAST 4/20/93
L-4 DAY WEATHER OUTLOOK FOR STS-55
George H. Diller
Kennedy Space Center
407/867-2468
At the opening of the launch window at 10:52 a.m. on Saturday
conditions are forecast to be:
Clouds: scattered low level and scattered high level
Visibility: 7 or miles or greater
Wind - Pad 39A: ESE/10-15
Temperature: 73 degrees
Dewpoint: 62 degrees
Humidity: 68%
Precipitation: very slight chance of showers
Other weather concerns: slight chance of ceilings below 8,000'
Probability of launch weather criteria violation: 10%
tanking criteria violation: 0%
Probability of launch weather violation on Sunday: 10%
tanking violation on Sunday: 0%
Probability of launch weather violation on Monday: 20%
tanking violation on Monday: 0%
Cape Canaveral Forecast Facility
4/20/93
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=--=START=--=--= NASA Spacelink File Name:6_2_2_43_9.TXT
STS-55 COUNTDOWN EVENTS SUMMARY
SPACELINK NOTE: The launch has been postponed until Saturday, April 24, 1993.
Mitch Varnes March 18, 1993
Kennedy Space Center
KSC Release No. 27-93
STS-55 LAUNCH COUNTDOWN TO BEGIN AT 4 P.M. EST TODAY
The countdown clock for the STS-55 flight of the Space Shuttle Columbia is
scheduled to begin at 4 p.m. (EST) today at the T-43 hour mark. The countdown
includes 24 hours and 52 minutes of built-in hold time leading up to the
opening of the launch window at 9:52 a.m. (EST) on Sunday, March 21.
At the start of the countdown, the launch team in firing room 1 of the Launch
Control Center will verify that the Shuttle vehicle is powered up and that the
data processing system and backup flight control system are operating. Flight
software stored in the orbiter's twin memory banks will be reviewed, computer
controlled display systems will be activated, and the backup flight system
general purpose computer will be loaded.
Preparations also start at the liquid oxygen and liquid hydrogen storage farms
for loading the external tank with super cold, or cryogenic, propellants.
Orbiter navigation aids are turned on and tested, and the inertial measurement
units are activated.
In parallel with these activities, the launch team prepares for loading
Columbia's onboard fuel cell storage tanks with liquid oxygen and liquid
hydrogen reactants. Also performed at the start of the countdown is the final
stowage, microbial sampling and water level adjustment of the crew waste
management system.
At T-27 hours, the countdown will enter its first built-in hold. This 4-hour
hold extends from 8 a.m. until noon on Friday, March 19. When the countdown
resumes, the launch pad will be cleared of all personnel in preparation for
loading the onboard fuel cell storage tanks.
Servicing of the liquid oxygen and liquid hydrogen fuel cell supply tanks is
scheduled to start at the T-25 hour mark. Servicing activities take
approximately five hours.
When servicing of the fuel cell tanks has been completed, the pad will be
reopened for normal work. Shortly thereafter, the countdown will enter the
second planned hold. During this fourhour hold at the T-19 hour mark, the
orbiter mid-body umbilical unit used to load the super cold fuel cell reactants
into the orbiter will be demated. This hold will extend from 8 p.m. until
midnight on Friday, March 19.
When the countdown resumes, technicians will complete final vehicle and
facility closeouts and begin activating the orbiter's communications systems
and configuring Columbia's cockpit for flight. The main propulsion system and
shuttle main engines will also be readied for cryogenic loading.
The orbiter's flight control system navigation aids and communications systems
will be activated and switches in the cockpit will be configured for loading of
the external tank. The stowable mission specialist seats will be installed in
the flight deck and along the middeck.
The countdown will enter the next built-in hold at T-11 hours at 8 a.m. on
Saturday, March 20. During this hold, time critical equipment will be
installed in the orbiter's cockpit and the inertial measurement units will be
activated and warmed up. At about 11 a.m., the rotating service structure will
be moved away from the vehicle to the launch position. This hold is scheduled
to last 11 hours and 32 minutes, or until 7:32 p.m. on Saturday.
At T-9 hours, the onboard fuel cells will be activated and the launch team will
begin evacuating the blast danger area at T-8 hours, or about 8:32 p.m. on
Saturday. At this time, final stowage of items into the crew module will occur
and the joint heaters on the solid rocket boosters will be activated. At T-7
hours, 30 minutes, the flow of conditioned air through the orbiter's payload
bay will be switched to gaseous nitrogen in preparation for loading the
external tank with super-cold liquid propellants.
The inertial measurement units will transition from the warm up stage to the
operate/attitude determination mode at T-6 hours and 45 minutes. At T-6 hours,
a steering check of the orbital maneuvering system engines will be performed.
The countdown will enter another planned built-in hold at the T-6 hour mark at
approximately 12:32 a.m. on Sunday. During this one-hour hold, final
preparations for loading the external tank will be completed and a pre-tanking
weather briefing will be conducted.
Chilldown of the main propulsion system and loading of cryogenic propellants
into the external tank will commence at the T-6 hour and counting mark at 1:32
a.m. Sunday. This fueling operation will be concluded by 4:32 a.m., at the
start of the T-3 hour hold.
The T-3 hour hold is two hours in duration. During this time, the ice
inspection team will perform a survey of the tank's outer insulation and the
closeout crew will begin configuring the crew module and white room for the
flight crew's arrival. Liquid oxygen and liquid hydrogen will be in a stable
replenish mode during this time to replace the propellant that "boils" off.
The astronauts are scheduled to be awakened at 4:42 a.m. on Sunday. Their
pre-flight meal is scheduled at 5:12 a.m.
After completing their meals, the crew will receive a briefing on weather
conditions at the Kennedy Space Center and at the contingency Shuttle landing
sites.
The astronauts will be outfitted in their partial pressure suits before leaving
the Operations and Checkout Building at about 6:37 a.m. They will arrive at
Launch Pad 39-A's white room at about 7:07 a.m. At the launch pad, closeout
personnel will assist the crew with their entry into Columbia.
Just prior to the T-1 hour mark, the test team and the flight crew will get
another weather update, including observations from astronaut Hoot Gibson, who
will be at KSC and flying in a Shuttle Training Aircraft.
The last two built-in holds will be 10 minutes in duration and will occur at
the T-20 minute mark or at 9:12 a.m. and at the T-9 minute mark or at 9:33 a.m.
During the final hold, readiness polls are taken by the NASA test director, the
Shuttle launch director and the Mission Management Team chairman. A final "go
for launch" will be given upon the successful completion of these pre-launch
polls.
Milestones after the T-9 minute mark include start of the ground launch
sequencer at T-9 minutes and counting; retraction of the orbiter access arm at
T-7 minutes, 30 seconds; start of the orbiter's auxiliary power units at T-5
minutes; pressurization of the liquid oxygen tank at T-2 minutes, 55 seconds;
pressurization of the liquid hydrogen tank at T-1 minute, 57 seconds; and the
electronic "go" to Columbia's onboard computers to start their own terminal
countdown sequence at T-31 seconds. A "go for main engine start" will be given
at about T-10 seconds, and Columbia's three main engines will start at T-6.6
seconds. Solid rocket ignition and lift-off occurs at T-0.
COUNTDOWN MILESTONES
Launch - 3 Days (Thursday, March 18)
Perform the call-to-stations at T-43 hours. Begin check out of the backup
flight system and review flight software stored in mass memory units and
display sytems. Load backup flight system software into the orbiter's fifth
general purpose computer.
Begin stowage of flight crew equipment. Inspect the orbiter's mid and
flight decks and remove crew module platforms. Start external tank loading
preparations.
Launch - 2 Days (Friday, March 19)
Enter first planned built-in hold at T-27 hours for a duration of 4
hours. Activate orbiter's navigation system.
Resume countdown. Start preparations for servicing fuel cell storage
tanks and begin final vehicle and facility closeouts for launch.
Clear launch pad of all personnel and load liquid oxygen and liquid
hydrogen reactants into the orbiter's fuel cell storage tanks.
Enter second planned built-in hold at T-19 hours for four hours.
After the loading operation, the pad will be reopened for normal work
and orbiter and ground support equipment closeouts will resume.
Demate orbiter mid-body umbilical unit used during fuel cell loading.
Resume countdown. Activate orbiter communications systems and prepare Shuttle
main engines for propellant tanking and flight.
Launch - 1 Day (Saturday, March 20)
Install mission specialist seats in crew cabin. The tail service masts
on the mobile launcher platform will be closed out for launch.
Enter planned hold at T-11 hours (5 a.m.) for a duration of 13 hours and
32 minutes.
During this hold, the orbiter's inertial measurement units will be
activated and kept in the "warm up" mode and film will be installed in the
numerous cameras on the launch pad. In addition, safety personnel will conduct
a debris walkdown and the pad sound suppression system water tank will be
filled.
The rotating service structure will be moved to the park position during
this hold at 11 a.m. Perform orbiter ascent switch list in crew cabin.
Resume countdown at 6:32 p.m. Install time critical flight crew
equipment and perform the pre-ingress switch list. Start fuel cell
flow-through purge.
Activate orbiter fuel cells. Configure communications at Mission Control
in Houston for launch. Clear the blast danger area of all non-essential
personnel and switch orbiter purge air to gaseous nitrogen.
Enter one-hour planned built-in hold at T-6 hours (11:32 p.m.).
Launch Day (Sunday, March 21)
Resume countdown. Launch team verifies there are no viola- tions of
launch commit criteria prior to cryogenic loading of the external tank. Start
loading the external tank with cryogenic propellants.
Complete filling the external tank with its flight load of liquid hydrogen
and liquid oxygen propellants. Perform open loop test with range safety and
conduct gimbal profile checks of orbi- tal maneuvering system engines.
Perform inertial measurement unit preflight calibration and align Merritt
Island Launch Area (MILA) tracking antennas.
Enter two hour hold at T-3 hours. Closeout crew and ice in- spection team
proceeds to launch pad.
Resume countdown at T-3 hours (5:32 a.m.) Complete closeout preparations
in the white room and cockpit switch configurations. Crew departs astronaut
quarters at Operations and Checkout Build- ing for the pad.
Flight crew enters orbiter. Astronauts perform air-to-ground voice checks
with Mission Control in Houston. Close orbiter crew hatch. Begin range safety
final network open loop command check, perform hatch seal and cabin leak
checks, begin the inertial measurement unit preflight alignment and range
safety closed loop test. The white room is closed out and the closeout crew
moves to fallback area. Primary ascent guidance data is transferred to the
backup flight system.
Enter planned 10-minute hold at T-20 minutes.
Resume countdown. Transition orbiter onboard computers to launch
configuration and start fuel cell thermal conditioning. Close orbiter cabin
vent valves. Backup flight system transitions to launch configuration.
Enter planned 10 minute hold at T-9 minutes.
Resume countdown.
Start automatic ground launch sequencer (T-9 minutes).
Retract orbiter crew access arm (T-7:30).
Start mission recorders (T-5:30).
Start APU's. Arm SRB and ET range safety safe/arm devices (T-5).
Start liquid oxygen drainback (T-4:55).
Start orbiter aerosurface profile test (T-3:55).
Orbiter transfers to internal power (T-3:30).
Start MPS gimbal profile test (T-3:30).
Pressurize liquid oxygen (LO2) tank (T-2:55)
Retract gaseous oxygen vent arm (T-2:55).
Fuel cells to internal reactants (T-2:35).
Pressurize liquid hydrogen (LH2) tank (T-1:57).
Deactivate SRB joint heaters (T-1:00).
LPS go for start of orbiter automatic sequence (T-0:31 seconds).
Start SRB gimbal profile test (T-0:6.6).
SRB ignition and liftoff (T-0).
Source:NASA Spacelink Modem:205-895-0028 Internet:192.149.89.61
=--=--=-END-=--=--=
=--=END OF COLLECTION---COLLECTED 8 FILES---COMPLETED 21:06:09=--=