Names | Space Transportation System-20 |
---|---|
Mission type | Satellites deployment Satellite repair |
Operator | NASA |
COSPAR ID | 1985-076A |
SATCAT no. | 15992 |
Mission duration | 7 days, 2 hours, 17 minutes, 42 seconds |
Distance travelled | 4,698,602 km (2,919,576 mi) |
Orbits completed | 112 |
Spacecraft properties | |
Spacecraft | Space Shuttle Discovery |
Launch mass | 118,981 kg (262,308 lb) |
Landing mass | 89,210 kg (196,670 lb) |
Payload mass | 17,540 kg (38,670 lb) [1] |
Crew | |
Crew size | 5 |
Members | |
EVAs | 2 |
EVA duration |
|
Start of mission | |
Launch date | August 27, 1985, 10:58:01 UTC (6:58:01 am EDT) |
Launch site | Kennedy, LC-39A |
Contractor | Rockwell International |
End of mission | |
Landing date | September 3, 1985, 13:15:43 UTC (6:15:43 am PDT) |
Landing site | Edwards, Runway 23 |
Orbital parameters | |
Reference system | Geocentric orbit |
Regime | Low Earth orbit |
Perigee altitude | 350 km (220 mi) |
Apogee altitude | 465 km (289 mi) |
Inclination | 28.45° |
Period | 92.00 minutes |
Instruments | |
Physical Vapor Transport Organic Solid Experiment (PVTOS) | |
STS-51-I mission patch Back row: James D. A. van Hoften, John M. Lounge, William F. Fisher Front row: Joe H. Engle, Richard O. Covey |
STS-51-I was the 20th mission of NASA's Space Shuttle program and the sixth flight of Space Shuttle Discovery. During the mission, Discovery deployed three communications satellites into orbit. The mission launched from Kennedy Space Center, Florida, on August 27, 1985, and landed at Edwards Air Force Base, California, on September 3, 1985.
Position | Astronaut | |
---|---|---|
Commander | Joe H. Engle Second and last spaceflight | |
Pilot | Richard O. Covey First spaceflight | |
Mission Specialist 1 | James D. A. van Hoften Second and last spaceflight | |
Mission Specialist 2 Flight Engineer | John M. Lounge First spaceflight | |
Mission Specialist 3 | William F. Fisher Only spaceflight |
Seat [2] | Launch | Landing | Seats 1–4 are on the flight deck. Seats 5–7 are on the mid-deck. |
---|---|---|---|
1 | Engle | ||
2 | Covey | ||
3 | van Hoften | Fisher | |
4 | Lounge | ||
5 | Fisher | van Hoften | |
6 | Unused | ||
7 | Unused |
Attempt | Planned | Result | Turnaround | Reason | Decision point | Weather go (%) | Notes |
---|---|---|---|---|---|---|---|
1 | 24 Aug 1985, 8:38:00 am | Scrubbed | — | Weather | 24 Aug 1985, 9:06 am (T−00:05:00) | Thunderstorms in the KSC area and a ship entering the SRB recovery area | |
2 | 25 Aug 1985, 7:57:00 am | Scrubbed | 0 days 23 hours 19 minutes | Technical | 25 Aug 1985, 8:11 am (T−00:09:00 hold) | Computer failure | |
3 | 27 Aug 1985, 6:58:01 am | Success | 1 day 23 hours 1 minute | Launch delayed 3 minutes, 1 second for weather and ship in entering SRB recovery area. |
Discovery launched at 6:58 a.m. EDT on August 27, 1985. Two earlier launch attempts, one on August 24 and another on August 25, were scrubbed – the first because of poor weather, [3] and the second because the backup orbiter computer failed and had to be replaced. [4] The successful launch on August 27, 1985, took place just as an approaching storm front reached the launch pad area.
The five-man STS-51-I crew included Joe H. Engle, commander; Richard O. Covey, pilot; and James D. A. van Hoften, John M. Lounge, and William F. Fisher, mission specialists. Their primary mission was to deploy three commercial communications satellites and retrieve and repair the Syncom IV-3 (Leasat-3) satellite, which had been deployed during the STS-51-D mission in April 1985, but had malfunctioned. In addition, a mid-deck materials processing experiment, the Physical Vapor Transport Organic Solid Experiment (PVTOS), was flown aboard Discovery.
The three communications satellites were Aussat-1, a multi-purpose spacecraft owned by Australia; ASC-1, owned and operated by the American Satellite Corporation (ASC); and Syncom IV-4 (Leasat-4), leased to the Department of Defense (DoD) by its builder, Hughes Space and Communications. Both Aussat-1 and ASC-1 were deployed on the day of the launch, August 27, 1985. Syncom IV-4 (Leasat-4) was deployed two days later. All three achieved their planned geosynchronous orbits and became operational.
On the fifth day of the mission, astronauts Fisher and van Hoften began repair efforts on the malfunctioning Syncom IV-3, following a successful rendezvous maneuver by Discovery. The effort was slowed by a problem with the Remote Manipulator System (Canadarm) elbow joint. After a second EVA by Fisher and van Hoften, the satellite's control lever was repaired, permitting commands from the ground to activate the spacecraft's systems and eventually send it into its proper geosynchronous orbit. The two EVAs lasted a total of 11 hours and 46 minutes.
Discovery landed on Runway 23 at Edwards Air Force Base at 6:16 a.m. PDT on September 3, 1985. The flight lasted a total of 7 days, 2 hours, 18 minutes and 42 seconds, during which the shuttle completed 112 orbits of the Earth.
The insignia depicts an American bald eagle, trailing red and white stripes, and pushing a boundary layer forward. The 19 stars, along with the eagle, are references to the 20th shuttle mission (with the eagle representing the orbiter and thus being the 20th "star"). Lining the patch are the surnames of the crew members.
NASA began a tradition of playing music to astronauts during the Project Gemini, and first used music to wake up a flight crew during Apollo 15. Each track is specially chosen, often by the astronauts' families, and usually has a special meaning to an individual member of the crew, or is applicable to their daily activities. [5]
Flight Day | Song | Artist/Composer |
---|---|---|
Day 2 | "Waltzing Matilda" [6] | Banjo Paterson |
Day 3 | "Over the Rainbow" | Judy Garland |
Day 4 | "I Saw the Light" | Willie Nelson |
Day 5 | "I Get Around" | Beach Boys |
Day 6 | "Lucky Old Sun" | Willie Nelson |
Day 7 | "Stormy Weather" [7] | Willie Nelson |
Day 8 | "Living in the USA" | Linda Ronstadt |
Syncom started as a 1961 NASA program for active geosynchronous communication satellites, all of which were developed and manufactured by the Space and Communications division of Hughes Aircraft Company. Syncom 2, launched in 1963, was the world's first geosynchronous communications satellite. Syncom 3, launched in 1964, was the world's first geostationary satellite.
STS-41-C was NASA's eleventh Space Shuttle mission, and the fifth mission of Space Shuttle Challenger. The launch, which took place on April 6, 1984, marked the first direct ascent trajectory for a Space Shuttle mission. During the mission, Challenger's crew captured and repaired the malfunctioning Solar Maximum Mission satellite, and deployed the Long Duration Exposure Facility (LDEF) experimental apparatus. STS-41-C was extended one day due to problems capturing the Solar Max satellite, and the landing on April 13, 1984, took place at Edwards Air Force Base, instead of at Kennedy Space Center as had been planned. The flight was originally numbered STS-13.
STS-32 was the 33rd mission of NASA's Space Shuttle program, and the ninth launch of Space ShuttleColumbia. Launched on January 9, 1990, it marked the first use of Kennedy Space Center Launch Complex 39A since 1986; it also marked the first use of Mobile Launcher Platform-3 (MLP-3) in the Space Shuttle program. STS-32 was, at the time, the longest shuttle mission yet conducted, with a duration of nearly 11 days. Before STS-32, the only mission of the same duration had been STS-9 in 1983. On January 20, 1990, STS-32 executed the third night landing of the shuttle program. STS-32 was also the first Shuttle mission of the 1990s.
Jerry Lynn Ross is a retired United States Air Force officer, engineer, and a former NASA astronaut. Ross is a veteran of 7 Space Shuttle missions, making him the joint record holder for most spaceflights.
STS-41-D was the 12th flight of NASA's Space Shuttle program, and the first mission of Space Shuttle Discovery. It was launched from Kennedy Space Center, Florida, on August 30, 1984, and landed at Edwards Air Force Base, California, on September 5, 1984. Three commercial communications satellites were deployed into orbit during the six-day mission, and a number of scientific experiments were conducted, including a prototype extendable solar array that would eventually form the basis of the main solar arrays on the International Space Station (ISS).
STS-51-A was the 14th flight of NASA's Space Shuttle program, and the second flight of Space Shuttle Discovery. The mission launched from Kennedy Space Center on November 8, 1984, and landed just under eight days later on November 16, 1984.
STS-51-C was the 15th flight of NASA's Space Shuttle program, and the third flight of Space Shuttle Discovery. It launched on January 24, 1985, and made the fourth shuttle landing at the Shuttle Landing Facility at the Kennedy Space Center in Florida on January 27, 1985. STS-51-C was the first shuttle mission dedicated to the United States Department of Defense (DoD), and consequently many details remain classified. NASA reported that a satellite (USA-8) was deployed during the mission using an Inertial Upper Stage booster was deployed and met mission objectives. At just over three days, the mission was shorter in duration than most civilian missions and was the shortest of Discovery's career.
STS-51-D was the 16th flight of NASA's Space Shuttle program, and the fourth flight of Space Shuttle Discovery. The launch of STS-51-D from Kennedy Space Center (KSC), Florida, on April 12, 1985, was delayed by 55 minutes, after a boat strayed into the restricted Solid Rocket Booster (SRB) recovery zone. STS-51-D was the third shuttle mission to be extended.
STS-61-B was the 23rd NASA Space Shuttle mission, and its second using Space Shuttle Atlantis. The shuttle was launched from Kennedy Space Center, Florida, on November 26, 1985. During STS-61-B, the shuttle crew deployed three communications satellites, and tested techniques of constructing structures in orbit. Atlantis landed at Edwards Air Force Base, California, at 16:33:49 EST on December 3, 1985, after 6 days, 21 hours, 4 minutes, and 49 seconds in orbit.
STS-49 was NASA's maiden flight of the Space Shuttle Endeavour, which launched on May 7, 1992. The primary goal of its nine-day mission was to retrieve an Intelsat VI satellite, Intelsat 603, which failed to leave Low Earth orbit two years before, attach it to a new upper stage, and relaunch it to its intended geosynchronous orbit. After several attempts, the capture was completed with the only three-person extravehicular activity (EVA) in space flight history. It would also stand until STS-102 in 2001 as the longest EVA ever undertaken.
Joseph Percival "Joe" Allen IV is an American former NASA astronaut. He logged more than 3,000 hours flying time in jet aircraft.
Dale Allan Gardner was a NASA astronaut, and naval flight officer who flew two Space Shuttle missions during the mid 1980s.
Donald Edward Williams was an American naval officer and aviator, test pilot, mechanical engineer and NASA astronaut. He logged a total of 287 hours and 35 minutes in space.
STS-51 was a NASA Space Shuttle Discovery mission that launched the Advanced Communications Technology Satellite (ACTS) in September 1993. Discovery's 17th flight also featured the deployment and retrieval of the SPAS-ORFEUS satellite and its IMAX camera, which captured spectacular footage of Discovery in space. A spacewalk was also performed during the mission to evaluate tools and techniques for the STS-61 Hubble Space Telescope (HST) servicing mission later that year. STS-51 was the first shuttle mission to fly a Global Positioning System (GPS) receiver, a Trimble TANS Quadrex. It was mounted in an overhead window where limited field of view (FoV) and signal attenuation from the glass severely impacted receiver performance. Full triple-redundant 3-string GPS would not happen until 14 years later with STS-118 in 2007.
Richard Oswalt Covey is a retired United States Air Force officer, former NASA astronaut, and a member of the United States Astronaut Hall of Fame.
Daniel Charles Brandenstein is the Executive Vice President and Chief Operating Officer of United Space Alliance. He is a former Naval Aviator, test pilot and NASA astronaut, who flew four Space Shuttle missions. He also served as Chief of the Astronaut Office from 1987 to 1992.
James Dougal Adrianus "Ox" van Hoften is an American civil and hydraulic engineer, retired U.S. Navy officer and aviator, and a former astronaut for NASA.
David Mathieson Walker, , was an American naval officer and aviator, fighter pilot, test pilot, and a former NASA astronaut. He flew aboard four Space Shuttle missions in the 1980s and 1990s.
John Michael "Mike" Lounge was an American engineer, a United States Navy officer, a Vietnam War veteran, and a NASA astronaut. A veteran of three Space Shuttle flights, Lounge logged over 482 hours in space. He was a mission specialist on STS-51-I (1985) and STS-26 (1988) and was the flight engineer on STS-35 (1990).
William Frederick Fisher is an American physician and a former NASA astronaut. Fisher went into space in 1985 on board the Space Shuttle. He retired from NASA in 1992 and returned to the full-time practice of medicine. His time at NASA coincided with that of his former wife and fellow astronaut Anna Lee Fisher. He is also the great grandson of Pony Express rider William Frederick Fisher