STS-33 was a

NASA The National Aeronautics and Space Administration (NASA ) is an independent agencies of the United States government, independent agency of the federal government of the United States, US federal government responsible for the United States ...

Space Shuttle The Space Shuttle is a retired, partially reusable launch system, reusable low Earth orbital spacecraft system operated from 1981 to 2011 by the U.S. National Aeronautics and Space Administration (NASA) as part of the Space Shuttle program. ...

mission and the 9th flight of Discovery, during which Space Shuttle ''Discovery'' deployed a payload for the

United States Department of Defense The United States Department of Defense (DoD, USDOD, or DOD) is an United States federal executive departments, executive department of the federal government of the United States, U.S. federal government charged with coordinating and superv ...

(DoD). It was the 32nd shuttle mission overall, the ninth flight of ''Discovery'', the fifth shuttle mission in support of the DoD, the seventh post-

Space Shuttle Challenger disaster On January 28, 1986, the Space Shuttle Challenger, Space Shuttle ''Challenger'' broke apart 73 seconds into its flight, killing all seven crew members aboard. The spacecraft disintegrated above the Atlantic Ocean, off the coast of Cape Can ...

mission and the last Shuttle mission of the 1980s. Due to the nature of the mission, specific details remain classified. ''Discovery'' lifted off from

Launch Complex 39B Launch Complex 39B (LC-39B) is the second of Launch Complex 39's three launch pads, located at NASA's Kennedy Space Center in Merritt Island, Florida. The pad, along with Launch Complex 39A, was first designed for the Saturn V launch vehicle, ...

Kennedy Space Center The John F. Kennedy Space Center (KSC, originally known as the NASA Launch Operations Center), located on Merritt Island, Florida, is one of the NASA, National Aeronautics and Space Administration's (NASA) ten NASA facilities#List of field c ...

(KSC),

Florida Florida ( ; ) is a U.S. state, state in the Southeastern United States, Southeastern region of the United States. It borders the Gulf of Mexico to the west, Alabama to the northwest, Georgia (U.S. state), Georgia to the north, the Atlantic ...

, on November 22, 1989, at 7:23:30 p.m. EST; it landed at

Edwards Air Force Base Edwards Air Force Base (AFB) is a United States Air Force installation in California. Most of the base sits in Kern County, California, Kern County, but its eastern end is in San Bernardino County, California, San Bernardino County and a souther ...

California California () is a U.S. state, state in the Western United States that lies on the West Coast of the United States, Pacific Coast. It borders Oregon to the north, Nevada and Arizona to the east, and shares Mexico–United States border, an ...

, on November 27, 1989, at 7:30:16 p.m. EST. The mission was officially designated STS-33R as the original STS-33 designator belonged to the ill-fated Challenger

STS-51-L STS-51-L was the disastrous 25th mission of NASA's Space Shuttle program and the final flight of Space Shuttle ''Challenger''. It was planned as the first Teacher in Space Project flight in addition to observing Halley's Comet for six day ...

, the 25th Space Shuttle mission. Official documentation for that mission contained the designator STS-33 throughout. As

was designated STS-33, future flights with the

STS-26 STS-26 was the 26th NASA Space Shuttle mission and the seventh flight of the orbiter ''Discovery''. The mission launched from Kennedy Space Center, Florida, on September 29, 1988, and landed four days later on October 3, 1988. STS-26 was decla ...

through STS-33 designators would require the R in their documentation to avoid conflicts in tracking data from one mission to another.

Crew

Crew seat assignments

Mission background

STS-33 was the original designation for the mission that became STS-51-L, the ''Challenger'' disaster. After ''Challenger''s destruction, NASA recycled the mission numbering system back to

, which was the 26th shuttle mission and the first to fly after the disaster. S. David Griggs, a veteran of

STS-51-D 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 st ...

, was to have been the pilot of this mission. He was killed in the crash of a vintage World War II aircraft in June 1989 while training to serve as pilot on STS-33, and is commemorated on the mission insignia with a single gold star on the blue field. He was replaced by John Blaha. Sonny Carter, a mission specialist on this flight, was killed in a commercial

plane crash An aviation accident is an event during aircraft operation that results serious injury, death, or significant destruction. An aviation incident is any operating event that compromises safety but does not escalate into an aviation accident. Pre ...

on April 5, 1991 while training to fly on

STS-42 STS-42 was a NASA Space Shuttle Space Shuttle Discovery, ''Discovery'' mission with the Spacelab module. Liftoff was originally scheduled for 8:45 Eastern Time Zone, EST (13:45 Coordinated Universal Time, UTC) on January 22, 1992, but the launc ...

Mission summary

STS-33 was originally scheduled to launch on November 20, 1989, but was delayed because of problems with the integrated electronics assemblies which controlled the ignition and separation of the shuttle's

solid rocket booster A solid rocket booster (SRB) is a solid propellant motor used to provide thrust in spacecraft launches from initial launch through the first ascent. Many launch vehicles, including the Atlas V, SLS and Space Shuttle, have used SRBs to give laun ...

s (SRBs). STS-33 was the third night launch of the Space Shuttle program, and the first since shuttle flights resumed in 1988 following the ''Challenger'' disaster of 1986. During the mission, ''Discovery'' deployed a single satellite, USA-48 (1989-090B). Experts believe that this was a secret Magnum

ELINT Signals intelligence (SIGINT) is the act and field of intelligence-gathering by interception of ''signals'', whether communications between people (communications intelligence—abbreviated to COMINT) or from electronic signals not directly u ...

(ELectronic INTelligence) satellite headed for

geosynchronous orbit A geosynchronous orbit (sometimes abbreviated GSO) is an Earth-centered orbit with an orbital period that matches Earth's rotation on its axis, 23 hours, 56 minutes, and 4 seconds (one sidereal day). The synchronization of rotation and orbital ...

, similar to that launched by

STS-51-C STS-51-C (formerly STS-10) 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 Ke ...

in 1985, making this mission essentially a duplicate of that earlier mission. According to Jim Slade of

ABC News ABC News most commonly refers to: * ABC News (Australia), a national news service of the Australian Broadcasting Corporation * ABC News (United States), a news-gathering and broadcasting division of the American Broadcasting Company ABC News may a ...

, USA-48 was intended to eavesdrop on military and diplomatic communications from the

Soviet Union The Union of Soviet Socialist Republics. (USSR), commonly known as the Soviet Union, was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 until Dissolution of the Soviet ...

, China, and other

communist state A communist state, also known as a Marxist–Leninist state, is a one-party state in which the totality of the power belongs to a party adhering to some form of Marxism–Leninism, a branch of the communist ideology. Marxism–Leninism was ...

s. The satellite deployed by STS-33 was a replacement for the one launched by STS-51-C, which was running out of the maneuvering fuel required for keeping its station over the

Indian Ocean The Indian Ocean is the third-largest of the world's five oceanic divisions, covering or approximately 20% of the water area of Earth#Surface, Earth's surface. It is bounded by Asia to the north, Africa to the west and Australia (continent), ...

. However, astronaut Gary E. Payton stated in 2009 that STS-51-C's payload is "still up there, and still operating". ''Aviation Week'' claimed that during STS-33, the shuttle initially entered an x orbit at an

inclination Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a reference plane and the orbital plane or axis of direction of the orbiting object. For a satellite orbiting the Eart ...

of 28.45° to the

equator The equator is the circle of latitude that divides Earth into the Northern Hemisphere, Northern and Southern Hemisphere, Southern Hemispheres of Earth, hemispheres. It is an imaginary line located at 0 degrees latitude, about in circumferen ...

. It then executed three

Orbital Maneuvering System In spaceflight, an orbital maneuver (otherwise known as a burn) is the use of propulsion systems to change the orbit of a spacecraft. For spacecraft far from Earth, an orbital maneuver is called a ''deep-space maneuver (DSM)''. When a spacec ...

(OMS) burns, the last on its fourth orbit. The first burn was to circularize the orbit at . The satellite was deployed on the seventh orbit, and ignited its

Inertial Upper Stage The Inertial Upper Stage (IUS), originally designated the Interim Upper Stage, was a Multistage rocket, two-stage, Solid-propellant rocket, solid-fueled space launch system developed by Boeing for the United States Air Force beginning in 1976 for ...

(IUS) booster at the ascending node of the eighth orbit, successfully placing it in a

geostationary transfer orbit In space mission design, a geostationary transfer orbit (GTO) or geosynchronous transfer orbit is a highly elliptical type of geocentric orbit, usually with a perigee as low as low Earth orbit (LEO) and an apogee as high as geostationary orbit ...

(GTO). This was the eighth IUS launched aboard the shuttle, and the seventh successfully deployed. STS-33 suffered a cabin leak in the

Waste Collection System A space toilet or zero-gravity toilet is a toilet that can be used in a weightless environment. In the absence of weight, the collection and retention of liquid and solid waste is directed by use of airflow. Since the air used to direct the wa ...

. STS-33 was observed by the telescope of the

U.S. Air Force The United States Air Force (USAF) is the air service branch of the United States Department of Defense. It is one of the six United States Armed Forces and one of the eight uniformed services of the United States. Tracing its origins to 1 ...

Air Force Maui Optical and Supercomputing observatory The Maui Space Surveillance Complex (MSSC) is a U.S. Space Force operating location for the 15th Space Surveillance Squadron and the Air Force Research Laboratory (AFRL) at Haleakala Observatory on Maui, Hawaii, with a twofold mission (). Fir ...

(AMOS) during five passes over

Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

. Spectrographic and infrared images of the shuttle obtained with the Enhanced Longwave Spectral Imager (ELSI) were aimed at studying the interactions between gases released by the shuttle's primary

reaction control system A reaction control system (RCS) is a spacecraft system that uses Thrusters (spacecraft), thrusters to provide Spacecraft attitude control, attitude control and translation (physics), translation. Alternatively, reaction wheels can be used for at ...

(RCS) and residual atmospheric

oxygen Oxygen is a chemical element; it has chemical symbol, symbol O and atomic number 8. It is a member of the chalcogen group (periodic table), group in the periodic table, a highly reactivity (chemistry), reactive nonmetal (chemistry), non ...

and

nitrogen Nitrogen is a chemical element; it has Symbol (chemistry), symbol N and atomic number 7. Nitrogen is a Nonmetal (chemistry), nonmetal and the lightest member of pnictogen, group 15 of the periodic table, often called the Pnictogen, pnictogens. ...

species in orbit. The landing was initially scheduled for November 26, 1989, but was postponed for a day because of strong winds at the landing site. ''Discovery'' landed at Edwards Air Force Base, California, on November 27, 1989, at 7:30:16 p.m. EST, after a mission duration of 5 days, 0 hour, 6 minutes, and 46 seconds.

References

External links