science

Sino Satellite Communications

Sino Satellite Communications 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 Sino Satellite Communications rather than just read about it. In short: Sino Satellite Communications Co., Ltd. known also as SinoSat is a Chinese company. It provided satellite communications through a pair of communications satellites in geostationary orbit.

Key takeaways

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

Reference excerpt

Sino Satellite Communications Co., Ltd. known also as SinoSat is a Chinese company. It provided satellite communications through a pair of communications satellites in geostationary orbit. Their two satellites were SinoSat 1 and SinoSat 3. A third satellite, SinoSat 2, failed shortly after launch.

History Sino Satellite Communications was formed in 1994. It was a subsidiary of China Aerospace Science and Technology Corporation (CASC). In 2007, a new joint venture (Chinese: 中国直播卫星有限公司; lit. 'China Direct Broadcast Satellite Co.', 'Ltd.') was formed with another state-owned company China Satellite Communications, which SinoSat 1 and other assets was injected to the joint venture as share capital. However, in 2009 China Satellite Communications was assigned as a subsidiary of CASC by the State-owned Assets Supervision and Administration Commission of the State Council (excluding some assets that were assigned to China Telecommunications Corporation). Since then, Sino Satellite Communications became a subsidiary of China Satellite Communications, with all the satellites were under the brand ChinaSat instead. In 2016 Sino Satellite Communications sold a 15% stake of a company (Chinese: 北京宇信电子) to Shenglu Telecommunication.

Satellites

SinoSat 1 Sinosat-1 was built by Aérospatiale using a Spacebus 3000 satellite bus. It was launched by a Long March 3B carrier rocket from the Xichang Satellite Launch Centre at 09:20 GMT on 18 July 1998. It was placed into a geostationary orbit, and is currently operating in a slot at 110.5° East of the Greenwich Meridian. It was redesignated Chinasat 5B.

SinoSat 1C SinoSat 1C was the brand name of Apstar 2R/Telstar 10 in China.

SinoSat 1D SinoSat 1C was the brand name of Telstar 18 in China.

SinoSat 2 Sinosat-2 was based on the DFH-4 bus. It was launched at 16:20 GMT on 28 October 2006, also using a Long March 3B. After launch, its solar panels and communications antenna failed to deploy, making the satellite unusable.

SinoSat 3 Sinosat-3 is a DFH-3 satellite, which was launched at 16:08 GMT on 31 May 2007. A Long March 3A rocket was used to place it into geosynchronous transfer orbit, making the 100th flight of a Long March rocket. It operates in geostationary orbit at 125° East. It was redesignated ChinaSat 5C.

SinoSat 5 Launched in 2011. Renamed to ChinaSat 10

SinoSat 6 Launched in 2010 by a Long March 3B rocket. Renamed to ChinaSat 6A.

Shareholders According to the company website, Sino Satellite Communications was owned by several state-owned companies, namely China Aerospace Science and Technology Corporation (CASC), CITIC Group and China Financial Computerization Corporation (Chinese: 中国金融电子化公司). However, as of 31 December 2007, CASC owned 99.26% stake directly and indirectly.

See also ChinaSat List of Long March launches

References

Worked examples

Example 1 — a first encounter with Sino Satellite Communications

Start with the simplest possible case. Write down what Sino Satellite Communications 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 Sino Satellite Communications 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 Sino Satellite Communications 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 Sino Satellite Communications

In research: Sino Satellite Communications 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 Sino Satellite Communications 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: Sino Satellite Communications is common in secondary-school and first-year university syllabi. It links to neighbouring topics Aerospace companies of China, CITIC Group, China Aerospace Science and Technology Corporation, so understanding it makes those chapters shorter.
In everyday life: Look for Sino Satellite Communications 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 Sino Satellite Communications in 20 minutes

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

Frequently asked questions

What is Sino Satellite Communications in simple terms?

Sino Satellite Communications Co., Ltd. known also as SinoSat is a Chinese company. It provided satellite communications through a pair of communications satellites in geostationary orbit.

Why does Sino Satellite Communications 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 Sino Satellite Communications?

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 Sino Satellite Communications.