science

SURCAL

SURCAL 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 SURCAL rather than just read about it. In short: The Surveillance Calibration (or SURCAL) satellites were a series of radar calibration satellites for the Naval Space Surveillance radar system. They were launched in the 1960s.

Key takeaways

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

Reference excerpt

The Surveillance Calibration (or SURCAL) satellites were a series of radar calibration satellites for the Naval Space Surveillance radar system. They were launched in the 1960s.

Background

The SURCAL series of satellites were produced by the Naval Research Laboratory to act as test and calibration targets for the Naval Space Surveillance radar. The first SURCAL satellite was intended to remain attached to the launch vehicle and was a 5.5 inch long, 5.5 inch diameter cylinder. The other four SURCAL satellites were box-shaped with solar panels, a transponder, and antennas. They transmitted a 216 MHz signal on command.

Launches

Other vehicles Astronautix includes passive satellites such as the SURCAL 150B and SURCAL 160 target objects as part of the SURCAL program.

References

Illustrations

Worked examples

Example 1 — a first encounter with SURCAL

Start with the simplest possible case. Write down what SURCAL 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 SURCAL 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 SURCAL 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 SURCAL

In research: SURCAL 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 SURCAL 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: SURCAL is common in secondary-school and first-year university syllabi. It links to neighbouring topics Radar calibration satellites, Satellites of the United States, Spacecraft launched by Thor rockets, so understanding it makes those chapters shorter.
In everyday life: Look for SURCAL 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 SURCAL in 20 minutes

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

Frequently asked questions

What is SURCAL in simple terms?

The Surveillance Calibration (or SURCAL) satellites were a series of radar calibration satellites for the Naval Space Surveillance radar system. They were launched in the 1960s.

Why does SURCAL 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 SURCAL?

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 SURCAL.