earth science

Meteosat 8

Meteosat 8 is a earth 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 Meteosat 8 rather than just read about it. In short: Meteosat 8 was a weather satellite, also known as MSG 1. The Meteosat series are operated by EUMETSAT under the Meteosat Transition Programme (MTP) and the Meteosat Second Generation (MSG) program.

Key takeaways

Meteosat 8 belongs to earth science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Meteosat 8 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Meteosat 8 from memory before moving on to harder problems.

Reference excerpt

Meteosat 8 was a weather satellite, also known as MSG 1. The Meteosat series are operated by EUMETSAT under the Meteosat Transition Programme (MTP) and the Meteosat Second Generation (MSG) program. Notable for imaging the first meteor to be predicted to strike the Earth, 2008 TC3. Launched 28 Aug 2002 by an Ariane V155, this European Meteorology satellite is in a Geostationary orbit. While Meteosat 8 meteorological instruments are working, solid state power amplifier SSPA-C failed in October 2002. On 22 May 2007, the satellite experienced an unexpected orbit change. This was initially assessed as due to a hit by an unknown object, but that was later assessed not to be credible. The thermal protection was damaged at the same time as the orbit change. Subsequent investigation assessed the Meteosat-8 spinning spacecraft's orbit change due to the mass release of thermal covering whose attachment failed. Meteosat-8 is still operating, and as of April 2013 is providing a backup capability to the Meteosat-10 primary 0-degree Full Earth Scan Service and also a backup to the Meteosat-9 Rapid Scan Service over Europe. In May 2012 Meteosat-8 switched to operating in an Earth Sensor Mode due to a problem with the Sun sensor data on board. After modifying the ground image processing system the Rapid Scan Service image quality was restored back to nominal. On 29 June 2016, EUMETSAT approved the proposal of relocating Meteosat-8 to 41.5°E, for the continuation of the Indian Ocean Data Coverage (IODC), replacing Meteosat-7. Meteosat-8 arrived at 41.5°E on 21 September. The distribution of IODC Meteosat-8 data, in parallel to Meteosat-7 data, started on 20 October. On 1 February 2017, Meteosat-8 replaced Meteosat-7 as the official EUMETSAT geostationary satellite for the Indian Ocean. Meteosat-8 had used up most of its available fuel by 2020, leaving the remaining fuel to be used for safe removal to an altitude 740km above the geostationary ring and slowing the satellite's spin rate. Although not designed to comply with the more recent ISO-24113 guidelines for space debris mitigation, EUMETSAT chose to do so in the case of Meteosat-8 as it had done so the year before for the polar-orbiting Metop-A. Meteosat-8 was finally decommissioned in October 2022 after twenty years in orbit.

References

Illustrations

Worked examples

Example 1 — a first encounter with Meteosat 8

Start with the simplest possible case. Write down what Meteosat 8 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In earth 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 Meteosat 8 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 Meteosat 8 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 Meteosat 8

In research: Meteosat 8 appears in earth 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 Meteosat 8 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: Meteosat 8 is common in secondary-school and first-year university syllabi. It links to neighbouring topics Weather satellites, so understanding it makes those chapters shorter.
In everyday life: Look for Meteosat 8 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 Meteosat 8 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Meteosat 8 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 Meteosat 8 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Meteosat 8 in simple terms?

Meteosat 8 was a weather satellite, also known as MSG 1. The Meteosat series are operated by EUMETSAT under the Meteosat Transition Programme (MTP) and the Meteosat Second Generation (MSG) program.

Why does Meteosat 8 matter?

Because it connects several earth 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 Meteosat 8?

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 Meteosat 8.