science

SOLRAD 6

SOLRAD 6 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 SOLRAD 6 rather than just read about it. In short: SOLRAD 6 (from "solar radiation"; also called SOLRAD 6A) was the sixth solar X-ray monitoring satellite in the United States Navy's SOLRAD series, the third in the series to successfully orbit. It was launched along with POPPY 2, an ELINT surveillance package, as well as three other satellites, boosted into orbit via a Thor Augmented Delta-Agena D rocket on June 15, 1963.

Key takeaways

SOLRAD 6 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect SOLRAD 6 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of SOLRAD 6 from memory before moving on to harder problems.

Reference excerpt

SOLRAD 6 (from "solar radiation"; also called SOLRAD 6A) was the sixth solar X-ray monitoring satellite in the United States Navy's SOLRAD series, the third in the series to successfully orbit. It was launched along with POPPY 2, an ELINT surveillance package, as well as three other satellites, boosted into orbit via a Thor Augmented Delta-Agena D rocket on June 15, 1963.

Background The SOLRAD science satellite program was conceived in 1958 to observe the Sun in the X-ray spectrum. It was quickly combined, to provide civilian cover (launches being unclassified at that time), with the concurrently conceived United States Naval Research Laboratory's GRAB satellite project, which would collect information on foreign radars and communications installations. There were five SOLRAD/GRAB missions between 1960 and 1962, with the scientific SOLRAD experiments sharing satellite space with GRAB's intelligence payload. Two of the missions were successful. In 1962, all U.S. overhead reconnaissance projects were consolidated under the National Reconnaissance Office (NRO), which elected to continue and expand the GRAB mission starting July 1962 with a next-generation set of satellites, code-named POPPY. With the initiation of POPPY, SOLRAD experiments would no longer be carried on electronic spy satellites; rather, they would now get their own satellites, launched alongside POPPY missions to provide some measure of mission cover. The first POPPY mission was launched on December 13, 1962, along with several other satellites on a mission similar to that of SOLRAD 3, complete with an Injun (satellite) ionospheric research satellite. The mission was successful, despite POPPY 1's elliptical (rather than the planned circular) orbit, and data was returned for 28 months. No SOLRAD was launched concurrent with this first POPPY mission.

Spacecraft SOLRAD 6 (also called SOLRAD 6A) was larger than its SOLRAD/GRAB predecessors: 24 inches in diameter (from 20) and with a nine-inch equatorial band giving the craft an elongated rather than spherical form. The satellite was equipped with six X-ray detecting ion chambers, two more than its predecessors, covering the ranges of 0.1-1.6Å, .5-3Å, 2-6Å, 2-8Å, 8-16Å, and 44-60Å.

Mission and results Launched on June 15, 1963 (COSPAR 1963-021C) via a Thor Augmented Delta-Agena D rocket from Vandenberg AFB with four other satellites, SOLRAD 6 was placed into an incorrect elliptical orbit, its perigee so low that the atmosphere soon caused the satellite to decay from orbit on July 31, 1963. Because of its short orbital lifetime, SOLRAD 6 returned relatively little data. Moreover, the Sun was very quiet during the satellite's six weeks of operation, and the four Lyman-Alpha photometers capable of registering X-ray emissions with wavelengths shorter than 8Å reported no results. No scientific data were ever published from SOLRAD 6's measurements, and the strip chart recordings of them were no longer available as of 1991.

References

Worked examples

Example 1 — a first encounter with SOLRAD 6

Start with the simplest possible case. Write down what SOLRAD 6 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 SOLRAD 6 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 SOLRAD 6 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 SOLRAD 6

In research: SOLRAD 6 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 SOLRAD 6 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: SOLRAD 6 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1963 in spaceflight, SOLRAD, Satellites of the United States, so understanding it makes those chapters shorter.
In everyday life: Look for SOLRAD 6 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 SOLRAD 6 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what SOLRAD 6 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 SOLRAD 6 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is SOLRAD 6 in simple terms?

Why does SOLRAD 6 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 SOLRAD 6?

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 SOLRAD 6.