science

Negai (satellite)

Negai (satellite) 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 Negai (satellite) rather than just read about it. In short: Negai☆″ ("Wish"), also known as Negai*, was a Japanese satellite which launched in May 2010. It was a student-built spacecraft operated by Soka University and was intended to be a technology demonstration.

Key takeaways

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

Reference excerpt

Negai☆″ ("Wish"), also known as Negai*, was a Japanese satellite which launched in May 2010. It was a student-built spacecraft operated by Soka University and was intended to be a technology demonstration. The satellite was a single unit CubeSat, and was used to test a commercial field programmable gate array in orbit. As part of an outreach programme, it carried the names of selected children involved in the program, along with wishes they have made. The satellite would return images of the Earth, which were given to the participants. The launch was conducted by Mitsubishi Heavy Industries under contract to the Japan Aerospace Exploration Agency. In preparation for a planned launch on 17 May, the H-IIA rocket was rolled out to Pad 1 of the Yoshinobu Launch Complex at the Tanegashima Space Centre on 16 May 2010. It departed the assembly building at 21:01 UTC and arriving at the launch pad 24 minutes later at 21:25 UTC. The terminal countdown began at 11:30 UTC on 17 May and by 15:28, the loading of cryogenic propellant into the rocket's first and second stages had been completed. The launch attempt was scrubbed a few minutes before liftoff due to bad weather, but took place successfully at 21:58:22 UTC on 20 May 2010. Negai was deployed from a JAXA Picosatellite Deployer attached to the second stage of the H-IIA 202 rocket used in the launch of the Akatsuki spacecraft towards Venus. Negai shared its dispenser with the K-Sat satellite, whilst a second dispenser contained Waseda-SAT2. The three CubeSats separated into low Earth orbit (LEO) during a coast phase of the launch, between the first and second burns of the second stage. The rocket then continued to Heliocentric orbit, where it deployed Akatsuki, along with the IKAROS and UNITEC-1 spacecraft. Negai’s orbit decayed on June 28th, 2010.

Worked examples

Example 1 — a first encounter with Negai (satellite)

Start with the simplest possible case. Write down what Negai (satellite) 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 Negai (satellite) 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 Negai (satellite) 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 Negai (satellite)

In research: Negai (satellite) 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 Negai (satellite) 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: Negai (satellite) is common in secondary-school and first-year university syllabi. It links to neighbouring topics CubeSats, Satellites of Japan, Secondary payloads, so understanding it makes those chapters shorter.
In everyday life: Look for Negai (satellite) 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 Negai (satellite) in 20 minutes

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

Frequently asked questions

What is Negai (satellite) in simple terms?

Why does Negai (satellite) 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 Negai (satellite)?

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 Negai (satellite).