astronomy

Vinasat-2

Vinasat-2 is a astronomy 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 Vinasat-2 rather than just read about it. In short: Vinasat-2 (stylized all uppercase) is the second Vietnamese satellite to be placed in orbit. It was launched at 22:13 UTC on May 15, 2012 (5:13 am on May 16 in the Vietnam time zone) at the European Spaceport in Kourou in French Guiana in South America and entered orbit 35 minutes later.

Key takeaways

Vinasat-2 belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Vinasat-2 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Vinasat-2 from memory before moving on to harder problems.

Reference excerpt

Vinasat-2 (stylized all uppercase) is the second Vietnamese satellite to be placed in orbit. It was launched at 22:13 UTC on May 15, 2012 (5:13 am on May 16 in the Vietnam time zone) at the European Spaceport in Kourou in French Guiana in South America and entered orbit 35 minutes later. VINASAT is the national satellite program of Vietnam. The project aims to bring independence in satellite communications for Vietnam, besides other benefits such as enhancing national security, opening new economic opportunities, etc. The satellite infrastructure is designed to support Vietnam's economic and public safety sectors by providing telecommunications links. It will provide communication for fishermen at sea, deliver weather forecasts and ensure defence security. The satellite cost about US$280 million, weighed 3,000 kilograms (6,600 lb), and was constructed by US-based Lockheed Martin. It will be able to provide capacity equal to 13,000 channels of telephone/internet/data communications or 150 television channels; greater number of sensor responses; and higher bandwidth capacity. The Lockheed Martin A2100 satellite has 12 Ku band transponders and 8 C band transponders.

Worked examples

Example 1 — a first encounter with Vinasat-2

Start with the simplest possible case. Write down what Vinasat-2 claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Vinasat-2 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 Vinasat-2 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 Vinasat-2

In research: Vinasat-2 appears in astronomy 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 Vinasat-2 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: Vinasat-2 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2012 in Vietnam, Ariane commercial payloads, Communications satellite stubs, so understanding it makes those chapters shorter.
In everyday life: Look for Vinasat-2 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 Vinasat-2 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Vinasat-2 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 Vinasat-2 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Vinasat-2 in simple terms?

Why does Vinasat-2 matter?

Because it connects several astronomy 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 Vinasat-2?

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 Vinasat-2.