physics

UHF Follow-On satellite

UHF Follow-On satellite is a physics 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 UHF Follow-On satellite rather than just read about it. In short: Ultra High Frequency Follow-On (UFO) satellite system is a United States Department of Defense (DoD) program sponsored and operated by the United States Space Force to provide communications for airborne, ship, submarine and ground forces. The UFO constellation replaced the U.S.

Key takeaways

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

Reference excerpt

Ultra High Frequency Follow-On (UFO) satellite system is a United States Department of Defense (DoD) program sponsored and operated by the United States Space Force to provide communications for airborne, ship, submarine and ground forces. The UFO constellation replaced the U.S. DoD Fleet Satellite Communications System (FLTSATCOM) constellation and consisted of eleven satellites. The ground terminal segment consists of equipment and resident personnel at existing satellite communication stations. The satellites are controlled by the 10th Space Operations Squadron (Space Delta 8) located at the Naval Base Ventura County, Point Mugu, California.

Satellite description The Ultra high frequency (UHF) satellites primarily served tactical users. UFO provided almost twice as many channels as FLTSATCOM and has about 10% more power per channel. THe satellites were built by Boeing Integrated Defense Systems (formerly Hughes Space and Communications Company) and were based on the 601 series of communications satellites. The Extremely high frequency (EHF) package on satellites four through eleven have an Earth coverage beam and a steerable five-degree spot beam that enhances its tactical use. The EHF capability also allows the UFO network to connect to the strategic Milstar system. Satellites eight, nine and ten also carry the Global Broadcast Service antennas that operate in the Ka-band. The Atlas was the launch vehicle of choice; however, space shuttle compatibility existed. The UFO bus and payload weigh 2,844 kg (6,270 lb). The solar panels spans 18.4 m (60 ft) and produces 2,500 watts at the end of the planned 14-year lifetime. The UHF system supports stationary and mobile users including manportable, ships, submarines, aircraft and other mobile terminals. The UFO Follow-On system is scheduled for replacement by the Mobile User Objective System (MUOS).

Block Upgrades Block 1 satellites had UHF and SHF communications. Block 2 satellites, starting with UHF 4, added extremely high frequency package with 11 channels. Block 3 satellites replaced the SFH communications with Ka-band transponders. Block 4 satellite incorporated a digital UHF receiver and two additional UHF channels.

Launch First launch of the UFO took place on 25 March 1993, with constellation completion dependent on replacement needs for the aging FLTSATCOM constellation.

Table of Satellites

References

External links GlobalSecurity.org: MUOS system

Illustrations

Worked examples

Example 1 — a first encounter with UHF Follow-On satellite

Start with the simplest possible case. Write down what UHF Follow-On satellite claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In physics, 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 UHF Follow-On 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 UHF Follow-On 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 UHF Follow-On satellite

In research: UHF Follow-On satellite appears in physics 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 UHF Follow-On 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: UHF Follow-On satellite is common in secondary-school and first-year university syllabi. It links to neighbouring topics Equipment of the United States Space Force, Military communications, Military space program of the United States, so understanding it makes those chapters shorter.
In everyday life: Look for UHF Follow-On 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 UHF Follow-On satellite in 20 minutes

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

Frequently asked questions

What is UHF Follow-On satellite in simple terms?

Why does UHF Follow-On satellite matter?

Because it connects several physics 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 UHF Follow-On 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 UHF Follow-On satellite.