science

Rasad 1

Rasad 1 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 Rasad 1 rather than just read about it. In short: Rasad-1 (Persian: رصد, meaning Observation) was an Iranian satellite which was launched in 2011. Satellite The third Iranian satellite, and the second to be launched successfully using an indigenous rocket, Rasad-1 was Iran's first imaging satellite.

Key takeaways

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

Reference excerpt

Rasad-1 (Persian: رصد, meaning Observation) was an Iranian satellite which was launched in 2011.

Satellite The third Iranian satellite, and the second to be launched successfully using an indigenous rocket, Rasad-1 was Iran's first imaging satellite. Launched aboard a Safir-B carrier rocket, it was successfully placed into a low Earth orbit at an altitude of 236 by 299 kilometres (147 by 186 mi), inclined at 55.7 degrees. It made approximately fifteen orbits per day. Rasad-1 was launched on the maiden flight of the Safir-B rocket, designated Safir-B1, from a launch site in Semnan province, Iran. The launch occurred at approximately 09:14 UTC on 15 June 2011 with the spacecraft reaching orbit several minutes later. The satellite had a mass of 15.3 kilograms (34 lb) and returned images with a resolution of 150 metres (490 ft). It was equipped with solar panels to generate power. The satellite decayed from orbit three weeks after launch, on 6 July 2011.

Worked examples

Example 1 — a first encounter with Rasad 1

Start with the simplest possible case. Write down what Rasad 1 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 Rasad 1 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 Rasad 1 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 Rasad 1

In research: Rasad 1 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 Rasad 1 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: Rasad 1 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2011 in Iran, Iranian Space Agency, Satellites of Iran, so understanding it makes those chapters shorter.
In everyday life: Look for Rasad 1 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 Rasad 1 in 20 minutes

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

Frequently asked questions

What is Rasad 1 in simple terms?

Rasad-1 (Persian: رصد, meaning Observation) was an Iranian satellite which was launched in 2011. Satellite The third Iranian satellite, and the second to be launched successfully using an indigenous rocket, Rasad-1 was Iran's first imaging satellite.

Why does Rasad 1 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 Rasad 1?

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 Rasad 1.