STS-55

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STS-55
STS-55 Spacelab.jpg
Spacelab Module LM1 in Columbia's payload bay, serving as the Spacelab D-2 laboratory.
Names Space Transportation System-55
Spacelab D-2
Mission type Microgravity research
Operator NASA and DLR
COSPAR ID 1993-027A OOjs UI icon edit-ltr-progressive.svg
SATCAT no. 22640 OOjs UI icon edit-ltr-progressive.svg
Mission duration9 days, 23 hours, 39 minutes, 59 seconds
Distance travelled6,701,603 km (4,164,183 mi)
Orbits completed160
Spacecraft properties
Spacecraft Space Shuttle Columbia
Landing mass103,191 kg (227,497 lb)
Payload mass11,539 kg (25,439 lb)
Crew
Crew size7
Members
Start of mission
Launch dateApril 26, 1993, 14:50:00 (April 26, 1993, 14:50:00)  UTC (10:50 am  EDT)
Launch site Kennedy, LC-39A
Contractor Rockwell International
End of mission
Landing dateMay 6, 1993, 14:29:59 (May 6, 1993, 14:29:59) UTC (7:29:59 am  PDT)
Landing site Edwards, Runway 22
Orbital parameters
Reference system Geocentric orbit
Regime Low Earth orbit
Perigee altitude 304 km (189 mi)
Apogee altitude 312 km (194 mi)
Inclination 28.45°
Period 90.70 minutes
Sts-55-patch.png
STS-55 mission patch
Sts-55 crew.jpg
Standing: Harris, Schlegel, Ross, Walter
Seated: Henricks, Nagel, Precourt
  STS-56 (54)
STS-57 (56) 

STS-55, or Deutschland 2 (D-2), was the 55th overall flight of the NASA Space Shuttle and the 14th flight of Shuttle Columbia . This flight was a multinational Spacelab flight involving 88 experiments from eleven different nations. The experiments ranged from biology sciences to simple Earth observations.

Contents

Crew

Position Astronaut
Commander Flag of the United States.svg Steven R. Nagel Solid blue.svg
Fourth and last spaceflight
Pilot Flag of the United States.svg Terence T. Henricks Solid blue.svg
Second spaceflight
Mission Specialist 1 Flag of the United States.svg Jerry L. Ross Solid blue.svg
Fourth spaceflight
Mission Specialist 2
Flight Engineer
Flag of the United States.svg Charles J. Precourt Solid red.svg
First spaceflight
Mission Specialist 3 Flag of the United States.svg Bernard A. Harris Jr. Solid red.svg
First spaceflight
Payload Specialist 1 Flag of Germany.svg Ulrich Walter, DLR Solid blue.svg
Only spaceflight
Payload Specialist 2 Flag of Germany.svg Hans Schlegel, DLR Solid red.svg
First spaceflight
Solid blue.svg Member of Blue Team
Solid red.svg Member of Red Team
Backup crew
Position Astronaut
Payload Specialist 1 Flag of Germany.svg Gerhard Thiele, DLR
Payload Specialist 2 Flag of Germany.svg Renate Brümmer, DLR

Crew seat assignments

Seat [1] LaunchLanding Space Shuttle seating plan.svg
Seats 1–4 are on the flight deck.
Seats 5–7 are on the mid-deck.
1Nagel
2Henricks
3RossHarris
4Precourt
5HarrisRoss
6Walter
7Schlegel

Launch

Columbia was initially scheduled to launch in late February 1993. However, this date slipped to early March 1993 due to concerns with the tip-seal retainers in the main engines' oxidizer turbopumps. All three turbopumps were replaced at the pad but later inspection revealed the retainers to be in good condition. Further delays were caused by the burst of a hydraulic flex hose in the aft compartment during the Flight Readiness Test (FRT). The lines were removed and inspected and three replacements were installed.

AttemptPlannedResultTurnaroundReasonDecision pointWeather go (%)Notes
122 Mar 1993, 7:30:00 pmScrubbedTechnical22 Mar 1993, 7:29 pm (T-0:03)Pad abort: oxidizer purge valve jammed on a chunk of O-ring, all 3 main engines changed. [2]
224 Apr 1993, 12:00:00 amScrubbed32 days 4 hours 30 minutesTechnicalPossible faulty reading with one of the inertial measurement units. [3]
326 Apr 1993, 2:50:00 pmSuccess2 days 14 hours 50 minutesLaunched

Mission highlights

Columbia carried to orbit the second reusable German Spacelab D-2 and demonstrated the shuttle's ability for international cooperation, exploration, and scientific research in space. The Spacelab module and an exterior experiment support structure contained in Columbia's payload bay comprised the Spacelab D-2 payload. The first German Spacelab flight, D-1, flew Shuttle mission STS-61-A in October 1985. The United States and Germany gained valuable experience for future space station operations.

The D-2 mission, as it was commonly called, augmented the German microgravity research program started by the D-1 mission. The German Aerospace Center (DLR) had been tasked by the German Space Agency (DARA – Deutsche Agentur für Raumfahrtangelegenheiten) to conduct the second mission. DLR, NASA, the European Space Agency (ESA), and agencies in France and Japan contributed to D-2's scientific program. Eleven nations participated in the experiments. Of the 88 experiments conducted on the D-2 mission, four were sponsored by NASA.

The crew worked in two shifts around-the-clock to complete investigations into the areas of fluid physics, materials sciences, life sciences, biological sciences, technology, Earth observations, atmospheric physics, and astronomy. Many of the experiments advanced the research of the D-1 mission by conducting similar tests, using upgraded processing hardware, or implementing methods that took full advantage of the technical advancements since 1985. The D-2 mission also contained several new experiments which were not previously flown on the D-1 mission.

The mission surpassed the 365th day in space for the Space Shuttle fleet and the 100th day of flight time in space for Columbia, the fleet's oldest Space Shuttle orbiter, on its fourteenth flight.

D-2 marked the first telerobotic capture of a free floating object by flight controllers in Germany. The crew conducted the first intravenous saline solution injection in space as part of an experiment to study the human body's response to direct fluid replacement as a countermeasure for amounts lost during space flight. They also successfully completed an in-flight maintenance procedure for collection of orbiter waste water, which allowed the mission to continue.

STS-55 crew members participated in two amateur radio experiments, SAREX II from the United States and the German SAFEX. These experiments allowed students and amateur radio operators from around the world to talk directly with the Space Shuttle in orbit and participated in a SpaceMedicine conference with the Mayo Clinic.

See also

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References

  1. "STS-55". Spacefacts. Retrieved July 29, 2024.
  2. "Former NASA Astronaut Steven Nagel Dies at 67". Space.com. August 22, 2014. Archived from the original on December 2, 2019. Retrieved March 15, 2020.
  3. "NASA – STS-55". NASA. Archived from the original on July 5, 2015. Retrieved February 12, 2022.PD-icon.svg This article incorporates text from this source, which is in the public domain.