science

Mir Environmental Effects Payload

Mir Environmental Effects Payload is a science 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 Mir Environmental Effects Payload rather than just read about it. In short: The Mir Environmental Effects Payload (MEEP) was a set of four experiments installed on the Russian space station Mir from March 1996 to October 1997 to study the effects of space debris impacts and exposure to the space environment on a variety of materials. The materials used in the experiments were being considered for use on the International Space Station, and by exposing them at a similar orbital altitude to t…

Key takeaways

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

Reference excerpt

The Mir Environmental Effects Payload (MEEP) was a set of four experiments installed on the Russian space station Mir from March 1996 to October 1997 to study the effects of space debris impacts and exposure to the space environment on a variety of materials. The materials used in the experiments were being considered for use on the International Space Station, and by exposing them at a similar orbital altitude to that flown by the ISS, the experiments provided an assessment of the performance of those materials in a similar space environment. MEEP also fulfilled the need to examine the occurrence and effects of man-made debris and natural micrometeoroids through capture and impact studies. The experiments were installed on the Mir docking module during STS-76, and retrieved during STS-86.

Components

MEEP consisted of four separate experiments mounted in four separate Passive Experiment Carriers (PEC) installed on Mir's docking module. Each PEC consisted of three components; the experiment carrier, which contained the experiment itself, the sidewall carrier, which kept the PEC secure in the payload bay of the space shuttle during launch and return, and the handrail clamp, which was used to attach the PEC to the docking module. The first experiment, Polished Plate Micrometeoroid and Debris (PPMD), consisted of gold, aluminium, and zinc plates and studied how often space debris hit the station, the sizes and sources of the debris, and the damage the debris might do on hitting a space station. The second, the Orbital Debris Collector (ODC), captured orbital debris in aerogel cells for return to Earth to determine the possible origins and components of that debris. The last two experiments, Passive Optical Sample Assemblies I (POSA I) and II (POSA II), tested various materials intended for use on the International Space Station including paint samples, glass coatings, multilayer insulation, and a variety of metallic samples.

History

MEEP was designed to assess the magnitude of molecular contamination in ISS critical exterior surfaces in the space environment and to quantify the performance and degradation rate of candidate and selected ISS exterior surface materials. NASA's Langley Research Center had overall responsibility for MEEP as well as the development of the Passive Equipment Carriers as well as the PPMD experiment. Johnson Space Center was responsible for the ODC, Marshall Space Flight Center for POSA I and Boeing's Defence and Space Group for POSA II. The MEEP experiment hardware was launched to Mir aboard Space Shuttle Atlantis on STS-76. The four experiments installed on the docking module during the only EVA of the mission, carried out by Michael Clifford and Linda Godwin on flight day six, 27 March 1996. MEEP remained attached to Mir for 18 months until 1 October 1997, when, during flight day seven of STS-86, the experiments were retrieved in an EVA by Vladimir Titov and Scott Parazynski. In addition to the MEEP experiments, a solar array which had been exposed to the space environment for more than ten years was removed from the core module of Mir in November 1997, and returned to Earth in January 1998 on STS-89. The experiments were then inspected and studied by teams of space environmental effects investigators for micrometeoroid and space debris effects, space exposure effects on materials, and electrical performance. Also MEEPS can trace their inception to the Passive Optical Sample Array (POSA) sample trays flown on STS-1 and STS-2, and their successor Effects of Oxygen Interaction with Materials (EOIM) on STS-3 and STS-5.

See also Long Duration Exposure Facility, NASA 1984-1990 European Retrievable Carrier, 1992-1993 Materials International Space Station Experiment, (1-8) from 2001

References Mir Environmental Effects Payload (MEEP) Archive System

Illustrations

Mir Environmental Effects Payload: The four experiments as installed on Mir's docking module; PPMD (1), ODC (2), POSA I (4) and POSA II (3). — The four experiments as installed on Mir's docking module; PPMD (1), ODC (2), POSA I (4) and POSA II (3).

Worked examples

Example 1 — a first encounter with Mir Environmental Effects Payload

Start with the simplest possible case. Write down what Mir Environmental Effects Payload claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, 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 Mir Environmental Effects Payload 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 Mir Environmental Effects Payload 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 Mir Environmental Effects Payload

In research: Mir Environmental Effects Payload appears in science 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 Mir Environmental Effects Payload 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: Mir Environmental Effects Payload is common in secondary-school and first-year university syllabi. It links to neighbouring topics Mir, Space exposure experiments, Space hardware returned to Earth intact, so understanding it makes those chapters shorter.
In everyday life: Look for Mir Environmental Effects Payload 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 Mir Environmental Effects Payload in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Mir Environmental Effects Payload 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 Mir Environmental Effects Payload out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Mir Environmental Effects Payload in simple terms?

Why does Mir Environmental Effects Payload matter?

Because it connects several science 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 Mir Environmental Effects Payload?

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 Mir Environmental Effects Payload.