astronomy

T14 (satellite)

T14 (satellite) 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 T14 (satellite) rather than just read about it. In short: T14 (formerly DirecTV-14) is a communication satellite launched on December 6, 2014. It is the first satellite offering Ultra-HD 4K television services using Reverse DBS.

Key takeaways

T14 (satellite) belongs to astronomy; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect T14 (satellite) to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of T14 (satellite) from memory before moving on to harder problems.

Reference excerpt

T14 (formerly DirecTV-14) is a communication satellite launched on December 6, 2014. It is the first satellite offering Ultra-HD 4K television services using Reverse DBS. The satellite adopted its current name in 2017.

Overview The T14 satellite is the sixth satellite built by SSL (Space Systems/Loral) for operator DirecTV. The high-capacity spacecraft is based on the SSL 1300 platform, T14 is a 20-kilowatt class Ka-band and reverse-band digital broadcast satellite that will be used to deliver Ultra HD and other new consumer services for DirecTV. DirecTV delivers hundreds of channels of digital programming to more than 31 million customers in the U.S. and Latin America with small-diameter dish antennas. This satellite provides service for users across the U.S. (including Hawaii and Alaska) and Puerto Rico. The satellite had a liftoff mass of approximately 6,300 kg. T14 is expected to operate for 15 years, or until 2029. Michael White, chairman, president and CEO of DirecTV, was skeptical of the prospects for 4K in the past but was determined to stay on the bleeding edge of broadcast technologies. The 6,300 kg T14 satellite uses Ka-band and Reverse Band Direct Broadcast Satellite (DBS) spectrum. DBS is expected to provide ample room for delivering 4K programs and other advanced services to customers. In March 2015, DirecTV became the first multi-channel video provider to offer 4K Ultra HD programming direct to customers, offering a variety of new releases, popular films and nature documentaries with nearly four times the resolution of HD. Customers who have DirecTV's Genie HD DVR are able to watch 4K programming on supporting 2014 Samsung UHD TVs. T14 also bolstered DirecTV's HD broadcasts. With the new satellite, the company now has a fleet of six HD satellites. Located at 99 degrees west, T14 uses spot beams to provide additional local HD content. The 20-kilowatt satellite was expected to enter service early Q2 2016. The next satellite, T15, launched May 27, 2015.

Worked examples

Example 1 — a first encounter with T14 (satellite)

Start with the simplest possible case. Write down what T14 (satellite) 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 T14 (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 T14 (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 T14 (satellite)

In research: T14 (satellite) 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 T14 (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: T14 (satellite) is common in secondary-school and first-year university syllabi. It links to neighbouring topics Communications satellite stubs, Communications satellites in geostationary orbit, DirecTV, so understanding it makes those chapters shorter.
In everyday life: Look for T14 (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 T14 (satellite) in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what T14 (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 T14 (satellite) out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is T14 (satellite) in simple terms?

T14 (formerly DirecTV-14) is a communication satellite launched on December 6, 2014. It is the first satellite offering Ultra-HD 4K television services using Reverse DBS.

Why does T14 (satellite) 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 T14 (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 T14 (satellite).