astronomy

Hispasat 1C

Hispasat 1C 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 Hispasat 1C rather than just read about it. In short: Hispasat 1C, also known as Hispasat 30W-3 and Hispasat 84W-1, was a Spanish communications satellite which was operated by Hispasat. It was constructed by Alcatel Space and is based on the Spacebus-3000B2 satellite bus.

Key takeaways

Hispasat 1C belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Hispasat 1C to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Hispasat 1C from memory before moving on to harder problems.

Reference excerpt

Hispasat 1C, also known as Hispasat 30W-3 and Hispasat 84W-1, was a Spanish communications satellite which was operated by Hispasat. It was constructed by Alcatel Space and is based on the Spacebus-3000B2 satellite bus. Launch occurred on 3 February 2000, at 23:30. The launch was contracted by ILS, and used an Atlas IIAS carrier rocket flying from SLC-36B at Cape Canaveral. It had a mass of 3,113 kilograms (6,863 lb), and an expected service life of 15 years. Following its launch and on-orbit testing, it was placed in geostationary orbit at 30° West, from where it provided communications services to Europe and the Americas. In 2014, after an agreement between Hispasat and Star One, the satellite was relocated at 84º West and renamed as Hispasat 84W-1. Finally, on June 2, 2017, the satellite was reorbited to a graveyard orbit, having had a service life of 17 years.

References

Worked examples

Example 1 — a first encounter with Hispasat 1C

Start with the simplest possible case. Write down what Hispasat 1C 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 Hispasat 1C 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 Hispasat 1C 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 Hispasat 1C

In research: Hispasat 1C 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 Hispasat 1C 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: Hispasat 1C is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2000 in Spain, Communications satellite stubs, Communications satellites in geostationary orbit, so understanding it makes those chapters shorter.
In everyday life: Look for Hispasat 1C 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 Hispasat 1C in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Hispasat 1C 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 Hispasat 1C out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Hispasat 1C in simple terms?

Why does Hispasat 1C 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 Hispasat 1C?

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 Hispasat 1C.