engineering

Goonhilly Satellite Earth Station

Goonhilly Satellite Earth Station is a engineering 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 Goonhilly Satellite Earth Station rather than just read about it. In short: Goonhilly Satellite Earth Station is a large radiocommunication site located on Goonhilly Downs near Helston on the Lizard peninsula in Cornwall, Britain. Owned by Goonhilly Earth Station Ltd under a 999-year lease from BT Group plc, it was at one time the largest satellite earth station in the world, with more than 30 communication antennas and dishes in use.

Key takeaways

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

Reference excerpt

Goonhilly Satellite Earth Station is a large radiocommunication site located on Goonhilly Downs near Helston on the Lizard peninsula in Cornwall, Britain. Owned by Goonhilly Earth Station Ltd under a 999-year lease from BT Group plc, it was at one time the largest satellite earth station in the world, with more than 30 communication antennas and dishes in use. The site also links into undersea cable lines.

History Its first dish, Antenna One (dubbed "Arthur"), was built in 1962 to link with Telstar. It was the first open parabolic design and is 25.9 metres (85 feet) in diameter and weighs 1,118 tonnes. After Pleumeur-Bodou Ground Station (Brittany) which received the first live transatlantic television broadcasts from the United States via the Telstar satellite at 0H47 GMT on 11 July 1962, Arthur received his first video in the middle of the same day. It is now a Grade II listed structure and is therefore protected. The site has also played a key role in communications events such as the Muhammad Ali fights, the Olympic Games, the Apollo 11 Moon landing, and 1985's Live Aid concert. The site was especially suitable for siting the satellite equipment: below Goonhilly Downs are thousands of feet of serpentine rock, a metamorphic rock of great hardness which was ideal for bearing the great weight of this equipment. It was also found that the serpentine provided the least interference with the minute signals received.

Statistics The site's largest dish, dubbed "Merlin", has a diameter of 32 metres (105 feet). Other dishes include Guinevere, Tristan, and Isolde after characters in Arthurian legend, much of which takes place in Cornwall. The earth station is powered by the National Grid. If power fails, all essential equipment will run off large batteries for up to 20 minutes, during which time two one-megawatt bio-diesel generators will take over. The nearby wind generator farm is not part of the complex.

Closure On 12 September 2006, BT announced it would shut down satellite operations at Goonhilly in 2008, and move them to Madley Communications Centre in Herefordshire, making that centre BT's only earth station.

Visitor centre Until Easter 2010 the site had a visitor centre inside which the Connected Earth gallery told the history of satellite communications. There were many other interactive exhibits, a café, a shop and one of Britain's fastest cybercafés (a one gigabit pipe and a theoretical maximum speed per computer of 100 Mbit). There were also tours around the main BT site and into the heart of Arthur. At its prime, the site attracted around 80,000 visitors a year, but in March 2010 BT announced that the visitor centre would be "Closed for Easter and beyond, until further notice."

Development to commercial deep space communication On 11 January 2011 it was announced that part of the site was to be sold to create a space science centre. This would involve upgrading some of the dishes to make them suitable for deep space communication with spacecraft missions. A new company was formed to manage the operations, Goonhilly Earth Station Ltd. The company leased most of the antennas for at least three years with the option to buy the entire complex in the future. Goonhilly Earth Station Ltd. took ownership of the site in January 2014. There are plans to connect one or more of the Goonhilly dishes into global radio astronomy interferometer networks. There are also plans to upgrade the former visitor centre into "an outreach centre promoting space and space science for visitors, including local residents and schools". In July 2015, the European Space Agency examined whether antenna Goonhilly 6 could be used to support Artemis 1 of the Orion spacecraft. Since then the 30 and 32 metre dishes have been refurbished, upgraded, tested and certified as deep space stations and conform to CCSDS and now can enhance NASA's Deep Space Network or ESA's ESTRACK network. The services are offered to NASA, ESA, JAXA, ASI, CNES, CSA, DLR and UKSA. The site is a partner in the bid by Newquay Airport to become the UK's first spaceport.

Support for Moon exploration In April 2018, Goonhilly became part of a collaboration partnership for commercial lunar mission support services, with the European Space Agency and Surrey Satellite Technology. The agreement calls for the upgrade of Goonhilly, and development of the Lunar Pathfinder mission. Plans exist for small landers with a lunar mothership providing communications relay. On 22 February 2024 the station served as the Earth station for the Intuitive Machines IM-1 spacecraft as it landed on the Moon. This was the first American spacecraft to do so since the Apollo 17 mission in 1972.

Gallery

References

External links

Official website

Illustrations

Worked examples

Example 1 — a first encounter with Goonhilly Satellite Earth Station

Start with the simplest possible case. Write down what Goonhilly Satellite Earth Station claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, 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 Goonhilly Satellite Earth Station 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 Goonhilly Satellite Earth Station 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 Goonhilly Satellite Earth Station

In research: Goonhilly Satellite Earth Station appears in engineering 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 Goonhilly Satellite Earth Station 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: Goonhilly Satellite Earth Station is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1962 establishments in England, BT Group buildings and structures, Buildings and structures in Cornwall, so understanding it makes those chapters shorter.
In everyday life: Look for Goonhilly Satellite Earth Station 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 Goonhilly Satellite Earth Station in 20 minutes

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

Frequently asked questions

What is Goonhilly Satellite Earth Station in simple terms?

Why does Goonhilly Satellite Earth Station matter?

Because it connects several engineering 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 Goonhilly Satellite Earth Station?

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 Goonhilly Satellite Earth Station.