Manned Flight nr: 137
Earth orbit Flight nr: 134
USA manned Flight nr: 69
Launch, orbit & landing data:
|1||Brand||Vance DeVoe||CDR||8d 23h 05m|
|2||Gardner||Guy Spence||PLT||8d 23h 05m|
|3||Hoffman||Jeffrey Alan||MSP||8d 23h 05m|
|4||Lounge||John Michael||MSP||8d 23h 05m|
|5||Parker||Robert Alan Ridley||MSP||8d 23h 05m|
|6||Durrance||Samuel Thornton||PSP||8d 23h 05m|
|7||Parise||Ronald Anthony||PSP||8d 23h 05m|
Orbits of Earth : 142. Distance traveled: 6,000,657 km. Orbiter Liftoff Mass: 121,286 kg. Orbiter Mass at Landing: 102,458 kg. Payload to Orbit: 11,943 kg. Payload Returned: 11,943 kg. Landed at: Concrete runway 22 at Edwards Air Force Base, Cali. Landing Speed: 374 kph. Touchdown miss distance: 609 m. Landing Rollout: 3,303 m.
Mission Name: STS-35 (38)
Pad 39-B (16)
38th Shuttle mission
10th Flight OV-102
4th and 6th Rollback
Pad Switch (1)
6th Night Launch
4th Night landing
Vance D. Brand (3), Commander
Guy S. Gardner (2), Pilot
Jeffrey A. Hoffman (2), Mission Specialist 1
John M. Lounge (3), Mission Specialist 2
Robert A. Parker (2), Mission Specialist 3
Samuel T. Durrance (1), Payload Specialist 1
Ronald A. Parise (1), Payload Specialist 2
December 2, 1990, 1:49:01 a.m. EST. Launch first scheduled for May 16, 1990. Following Flight Readiness Review (FRR), announcement of firm launch date delayed to change out a faulty freon coolant loop proportional valve in orbiter's coolant system. At subsequent Delta FRR, date set for May 30. Launch on May 30 scrubbed during tanking due to minor hydrogen leak in tail service mast on mobile launcher platform and major leak in external tank/ orbiter 17-inch quick disconnect assembly. Hydrogen also detected in orbiter's aft compartment believed associated with leak involving 17-inch umbilical assembly.
Leakage at 17-inch umbilical confirmed by mini-tanking test June 6. Could not repair at pad and orbiter returned to VAB June 12, demated and transferred to OPF. Changeout of orbiter- side 17-inch umbilical assembly made with one borrowed from orbiter Endeavour; external tank fitted with new umbilical hardware. ASTRO-1 payload reserviced regularly and remained in COLUMBIA's cargo bay during orbiter repairs and reprocessing.
COLUMBIA rolled out to Pad A for second time Aug. 9 to support a Sept. 1 launch date. Two days before launch, avionics box on BBXRT portion of ASTRO-1 payload malfunctioned and had to be changed out and retested. Launch rescheduled for Sept. 6. During tanking, high concentrations of hydrogen detected in orbiter's aft compartment, forcing another postponement. NASA managers concluded that COLUMBIA had experienced separate hydrogen leaks from beginning: one of umbilical assembly (now replaced) and one or more in aft compartment which had resurfaced. Suspicion focused on package of three hydrogen recirculation pumps in aft compartment. These were replaced and retested. Damaged teflon cover seal in main engine number three hydrogen prevalve replaced. Launch rescheduled for Sept. 18. Fuel leak in aft compartment resurfaced during tanking and mission scrubbed again. STS-35 mission put on hold until problem resolved by special tiger team assigned by Space Shuttle director.
COLUMBIA transferred to Pad B Oct. 8 to make room for Atlantis on Mission STS-36. Tropical storm Klaus forced rollback to VAB Oct. 9. Vehicle transferred to Pad B again Oct. 14. Mini-tanking test conducted Oct. 30, using special sensors and video cameras and employing a see-through plexiglass aft compartment door. No excessive hydrogen leakage detected. Liftoff Dec. 2 delayed 21 minutes to allow Air Force range time to observe low-level clouds that might impede tracking of Shuttle ascent. Launch Weight: 256,385 lbs.
Altitude: 190 nm
Inclination: 28.45 degrees
Duration: 8 days, 23 hours, 5 minutes, 8 seconds.
Distance: 3,728,636 miles
ET : 35/LWT-28
MLP : 3
December 10, 1990, 9:54:08 p.m. PST, Runway 22, Edwards Air Force Base, Calif. Rollout Distance: 10,447 feet. Rollout Time:58 seconds. Orbiter returned to KSC on Dec. 20. Landing Weight: 225,329 lbs.
Primary objectives were round-the-clock observations of celestial sphere in ultraviolet and X-ray astronomy with ASTRO-1 observatory consisting of four telescopes: Hopkins Ultraviolet Telescope (HUT); Wisconsin Ultraviolet Photo-Polarimeter Experiment (WUPPE); Ultraviolet Imaging Telescope (UIT); and Broad Band X-Ray Telescope (BBXRT). Ultraviolet telescopes mounted on Spacelab elements in cargo bay were to be operated in shifts by flight crew. Loss of both data display units (used for pointing telescopes and operating experiments) during mission impacted crew-aiming procedures and forced ground teams at Marshall Space Flight Center to aim ultraviolet telescopes with fine-tuning by flight crew. BBXRT, also mounted in cargo bay, was directed from outset by ground-based operators at Goddard Space Flight Center and not affected. Other experiments: Shuttle Amateur Radio Experiment-2 (SAREX-2); ground-based experiment to calibrate electro-optical sensors at Air Force Maui Optical Site (AMOS) in Hawaii; and crew conducted Space Classroom Program: Assignment: The Stars, to spark student interest in science, math and technology. Crew experienced trouble dumping waste water due to clogged drain, but managed using spare containers. Mission cut short one day due to impending bad weather at primary landing site, Edwards Air Force Base, Calif. Science teams at Marshall and Goddard Space Flight Centers estimated 70 percent of planned science data achieved.
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