physics

STS-6

STS-6 is a physics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand STS-6 rather than just read about it. In short: STS-6 was the sixth NASA Space Shuttle mission and the maiden flight of the Space Shuttle Challenger. Launched from Kennedy Space Center on April 4, 1983, the mission deployed the first Tracking and Data Relay Satellite, TDRS-1, into orbit, before landing at Edwards Air Force Base on April 9, 1983.

Key takeaways

STS-6 belongs to physics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect STS-6 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of STS-6 from memory before moving on to harder problems.

Reference excerpt

STS-6 was the sixth NASA Space Shuttle mission and the maiden flight of the Space Shuttle Challenger. Launched from Kennedy Space Center on April 4, 1983, the mission deployed the first Tracking and Data Relay Satellite, TDRS-1, into orbit, before landing at Edwards Air Force Base on April 9, 1983. STS-6 was the first Space Shuttle mission during which a Extravehicular activity was conducted, and hence was the first in which the Extravehicular Mobility Unit (EMU) was used.

Crew

Commander Paul Weitz had previously served as Pilot on the first Skylab crewed mission (Skylab-2), where he lived and worked in Skylab for nearly a month from May to June 1973. After Skylab, Weitz became the Deputy Chief of the Astronaut Office under Chief Astronaut John Young. Bobko originally became an astronaut for the Air Force's Manned Orbiting Laboratory (MOL) program but later joined NASA in 1969 after the MOL program's cancellation. Prior to STS-6 he participated in the Skylab Medical Experiment Altitude Test (SMEAT) and worked as a member of the support crew for the Apollo-Soyuz Test Project (ASTP). Peterson was also a transfer from the MOL program, and was a member of the support crew for Apollo 16. Musgrave joined NASA in 1967 as part of the second scientist-astronaut group, and was the backup Science Pilot for the first Skylab mission. He also participated in the design of the equipment that he and Peterson used during their EVA on the STS-6 mission.

Support crew Roy D. Bridges Jr. (entry CAPCOM) Mary L. Cleave Richard O. Covey (ascent CAPCOM) Guy Gardner Jon McBride Bryan D. O'Connor

Spacewalk Personnel: Musgrave and Peterson Date: April 7–8, 1983 (21:03–01:20 UTC) Duration: 4 hours, 17 minutes

Crew seat assignments

Mission background

The new orbiter was rolled out to LC-39A in December 8, 1982. On December 18, 1982, Challenger was given a PFRF (Pre Flight Readiness Firing) to verify the operation of the main engines. The PFRF lasted for 16 seconds. Although engine operation was generally satisfactory, telemetry data indicated significant leakage of liquid hydrogen in the thrust section. However, it was not possible to determine the location of the leak with certainty, so program directors decided on a second PFRF with added telemetry probes. It was known that during the test run on December 18, 1982, that recirculated exhaust gases and vibration leaked into the thrust section and this was considered a potential cause of the leak. Therefore, the original planned launch in late January 1983 had to be postponed. On January 25, 1983, a second PFRF was conducted which lasted 23 seconds and exhibited more hydrogen leaks. Eventually, it was found that low pressure ducting in the No. 1 engine was cracked. The engine was replaced by a spare, which was found to also have leaks. A third engine had to be ordered from Rocketdyne, and after thorough testing, turned out to be in proper operating condition. The No. 2 and No. 3 engines turned out to have leaks as well, and were taken out of the orbiter for repairs. By mid-March, the engine problems had been completely resolved. While the engine repairs were underway on February 28, 1983, a severe storm caused contamination of the mission's primary cargo, the first Tracking and Data Relay Satellite-A (TDRS-1), while it was in the Payload Changeout Room on the Rotating Service Structure at the launch pad. Consequently, the satellite had to be taken back to its checkout facility, where it was cleaned and rechecked. The Payload Changeout Room and the payload bay also had to be cleaned. All of these events pushed the launch back from March 26, 1983, to early April 1983.

Mission summary On April 4, 1983, STS-6, the first mission of the orbiter Challenger, lifted off from Launch Complex 39A at the Kennedy Space Center at 18:30:00 UTC (1:30 pm EST, local time at the launch site). It marked the first use of a new lightweight external tank and lightweight Space Shuttle Solid Rocket Booster (SRB) casings, first use of the head-up display, and first extravehicular activity (EVA) in the Space Shuttle program.

STS-6 carried a crew of four – Commander Paul J. Weitz, Pilot Karol J. Bobko, Mission Specialist F. Story Musgrave and Mission Specialist Donald H. Peterson. Using new spacesuits designed specifically for the Space Shuttle program, Musgrave and Peterson successfully accomplished the program's first extravehicular activity (EVA) on April 7–8, 1983, performing various tests in the orbiter's payload bay. Their spacewalk lasted 4 hours and 17 minutes and was the first American EVA since the last of Skylab 4's four EVAs nearly a decade prior. Although the 2,300 kg (5,100 lb) TDRS-A satellite was successfully deployed from Challenger, its two-stage booster rocket, the Inertial Upper Stage (IUS), tumbled out of control, placing the satellite into a low elliptical orbit. However, the satellite contained extra propellant beyond what was needed for its attitude control thrusters, and during the next several months, its thrusters were fired at carefully planned intervals, gradually moving TDRS-1 into its geosynchronous operating orbit, thus saving the US$100-million satellite. Other STS-6 payloads included three Getaway Special (GAS) canisters and the continuation of the Mono-disperse Latex Reactor and Continuous Flow Electrophoresis experiments. Challenger returned to Earth on April 9, 1983, coming to a stop on Runway 22 at Edwards Air Force Base at 18:53:42 UTC (10:53:42 a.m. PST, local time at the landing site). During the mission, it completed 81 orbits, traveling 3,200,000 km (2,000,000 mi; 1,700,000 nmi) in 5 days, 23 minutes, and 42 seconds. It was flown back to KSC on April 16, 1983.

Mission insignia The six white stars in the upper blue field of the mission patch, and its hexagonal shape, indicate the flight's numerical designation in the Space Transportation System's mission sequence.

Wake-up calls 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.

Gallery

Illustrations

Worked examples

Example 1 — a first encounter with STS-6

Start with the simplest possible case. Write down what STS-6 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to STS-6 before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about STS-6 ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of STS-6

In research: STS-6 appears in physics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses STS-6 in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: STS-6 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1983 in science, 1983 in spaceflight, 1983 in the United States, so understanding it makes those chapters shorter.
In everyday life: Look for STS-6 outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study STS-6 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what STS-6 means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain STS-6 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is STS-6 in simple terms?

Why does STS-6 matter?

Because it connects several physics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study STS-6?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on STS-6.