science

VLS-1 V01

VLS-1 V01 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 VLS-1 V01 rather than just read about it. In short: VLS-1 V01 was the first launch of the VLS-1 rocket that took place on November 2, 1997, from the Alcântara Launch Center with the goal of putting the SCD-2A satellite into orbit. The launch was unsuccessful, with the rocket being remotely destroyed due to deviation from its trajectory.

Key takeaways

VLS-1 V01 belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect VLS-1 V01 to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of VLS-1 V01 from memory before moving on to harder problems.

Reference excerpt

VLS-1 V01 was the first launch of the VLS-1 rocket that took place on November 2, 1997, from the Alcântara Launch Center with the goal of putting the SCD-2A satellite into orbit. The launch was unsuccessful, with the rocket being remotely destroyed due to deviation from its trajectory.

Background and goals The VLS-1 rocket was originally proposed in 1979 as part of the Brazilian Complete Space Mission. It was originally planned to launch in 1989. However, it was later delayed to 1990, then 1994, 1995, finally becoming ready in 1997 within "Operation Brazil". The mission had the objective of placing in orbit the SCD-2A satellite developed by INPE, and to test the vehicle in flight. The first prototype of the VLS was 80% Brazilian technology. The satellite was planned to be placed into a circular orbit with an altitude of 750 kilometers, and on February 20, the payload fairing separation test had already been successfully carried out. On July 1, 1997, the equipment was sent to the Alcântara base and both the rocket and the satellite were ready by August 1997. For a launch cost of R$7.215 million in 1997 (US$12.41 million in 2024), it would be cheaper than the U.S. rocket Pegasus which cost R$16.65 million (US$28.64 million in 2024) per launch. The Ministry of Aeronautics barred the Press and civil authorities from attending the launch, claiming "security issues and lack of infrastructure" for receiving the press and guests at the base. As a result, President Fernando Henrique Cardoso had his visit to the base moved forward to October 21. Initially the launch was to take place in early September; however, delays at the center and the fact that the rocket was struck by lightning postponed the preparations. AEB sought to work with Embratel and Telebrás to broadcast the launch nationwide. The launch was supposed to take place on October 26, 1997, but was delayed in the early hours of the same day due to a malfunction in the Doppler radar, made by Thomson-CSF, which would track the launch and identify the satellite's orbit. If the next attempt did not occur by the end of the planned window (November 10), the rocket would have to be put into a horizontal position due to the instability of its fuel.

Launch On November 2, during the countdown, the timer had to be paused for about 15 minutes due to a plane crossing the restricted airspace. At 12:25 a.m. (UTC) the rocket was launched with a mass of 50 tons at the time of launch. Within about a minute the technicians noticed a problem with strap-on booster D, which caused the rocket to climb at an incline. Although the vehicle corrected the inclination, about seven tons of dead weight unbalanced the ascent, which led, 65 seconds after launch, to the remote destruction of a satellite worth $5 million and a $6.5 million rocket. It was later revealed that of the four boosters, one was not engaged, causing it to go off course. The rocket was destroyed at a height of 3,230 metres (10,600 ft), and its debris fell into the interdicted sea area about 2 kilometres (1.2 mi) from the launch pad. At the time of the destruction, the rocket was going 700 km/h. A 15-minute pause was taken in the picture chain operated by Radiobrás and broadcast to auditoriums with guests in Brasília, São Luís and São José dos Campos. On the return of the broadcast, Colonel Thiago da Silva announced the failure.

Aftermath Luiz Gylvan Meira Filho, the then-president of the Brazilian Space Agency, noted that the fact that the rocket sought to correct its trajectory was an engineering success. The investigation pointed to a malfunctioning "mechanical safety device", that hindered the transmission of the pyrotechnic order, as responsible for the accident. Fabio Wagner Costa, from the University Center of Brasília, reports that the test was considered positive because it allowed "the validation of important components, including the control system". A professor at the Aeronautics Institute of Technology, speaking anonymously to the media, said that the accident could have been avoided if the entire boosters assembly had been tested in an integrated manner, but the CTA tests only addressed each strap-on booster separately. The "integrated test", with all four boosters, only occurred with the launch, contrary to what the ITA had advised. The military was warned about the risk of an accident months before the launch. Not all the tests were performed on the safety mechanism responsible for the accident due to the pressure to get the launch done on time. The next launch occurred in 1999, ending with the remote destruction of the vehicle and the SACI-2 satellite about three minutes after liftoff.

Flight profile

Worked examples

Example 1 — a first encounter with VLS-1 V01

Start with the simplest possible case. Write down what VLS-1 V01 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 VLS-1 V01 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 VLS-1 V01 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 VLS-1 V01

In research: VLS-1 V01 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 VLS-1 V01 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: VLS-1 V01 is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1997 in Brazil, 20th-century rocket launches, Satellite launch failures, so understanding it makes those chapters shorter.
In everyday life: Look for VLS-1 V01 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 VLS-1 V01 in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what VLS-1 V01 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 VLS-1 V01 out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is VLS-1 V01 in simple terms?

Why does VLS-1 V01 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 VLS-1 V01?

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 VLS-1 V01.