astronomy

Mars Telecommunications Orbiter

Mars Telecommunications Orbiter is a astronomy 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 Mars Telecommunications Orbiter rather than just read about it. In short: The Mars Telecommunications Network (MTN), formerly known as the Mars Telecommunications Orbiter (MTO), is a planned Mars orbiter mission intended to provide better communication for Mars landers, rovers and other spacecraft on the surface of the planet. History The Mars Telecommunications Orbiter (MTO) was initially a cancelled Mars mission that was originally intended to launch in 2009 and would have established a…

Key takeaways

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

Reference excerpt

The Mars Telecommunications Network (MTN), formerly known as the Mars Telecommunications Orbiter (MTO), is a planned Mars orbiter mission intended to provide better communication for Mars landers, rovers and other spacecraft on the surface of the planet.

History

The Mars Telecommunications Orbiter (MTO) was initially a cancelled Mars mission that was originally intended to launch in 2009 and would have established an Interplanetary Internet between Earth and Mars. The spacecraft would have arrived in a high orbit above Mars in 2010 and relayed data packets to Earth from a variety of Mars landers, rovers and orbiters for as long as ten years, at an extremely high data rate. Such a dedicated communications satellite was thought to be necessary due to the vast quantity of scientific information to be sent to Earth by landers such as the Mars Science Laboratory. On 21 July 2005, it was announced that MTO had been canceled due to the need to support other short-term goals, including a Hubble servicing mission, Mars Exploration Rover extended mission operations, launching Mars Science Laboratory in 2009, and to prevent Earth science mission Glory from being cancelled.

Data transfer technology The initial Mars Telecommunications Orbiter would have carried a Mars Laser Communication Demonstration to demonstrate laser communication in space (optical communications), instead of usual radiowaves. "Lasercom sends information using beams of light and optical elements, such as telescopes and optical amplifiers, rather than RF signals, amplifiers, and antennas." The original MTO would have had two 15 W X-band radio transmitters, and two Ka-band radio transmitters (35 W operational, and 100 W experimental).

Proposed successors After the cancellation, a broader mission was proposed as the Mars Science and Telecommunications Orbiter. However, this mission was soon criticized as lacking well-defined parameters and objectives. Another mission, the 2013 Mars Science Orbiter, had also been proposed, though it would never be carried out. The communications capability provided by the Mars Reconnaissance Orbiter and Mars Express science missions has proven substantial, demonstrating that dedicated relay satellites may be unnecessary in the near future. The two newest science orbiters are the MAVEN, which arrived to Mars on 21 September 2014, with an Electra transceiver; and the 2016 European ExoMars Trace Gas Orbiter, that also carries an Electra UHF band transceiver. However, these orbiters follow science orbits that are not designed for relay communications. In 2014, there was a concern in NASA that the currently used relay satellite, Mars Odyssey, may fail, resulting in the need to press MAVEN science orbiter into use as the backup telecommunications relay, however, the highly elliptical orbit of MAVEN would limit its usefulness as a relay for operating landers on the surface. In 2018, a Next Mars Orbiter (NeMO) was proposed by NASA. NeMO is to be a dedicated telecommunications orbiter with a robust science package, which was expected to launch in 2022. It was anticipated to employ a laser communication subsystem, that was successfully tested aboard the Lunar Atmosphere and Dust Environment Explorer (LADEE) mission in 2013. This project is currently on hiatus as of 2025.

Revival The 2025 One Big Beautiful Bill Act allocated $700 million to develop the orbiter. The MTO will be procured through a fixed-price contact from commercial partners who previously received funding from NASA for design studies for a Mars Sample Return Mission that proposed a telecommunication orbiter as a part of their proposed mission. That makes a maximum of eight companies eligible, Aerojet Rocketdyne, Blue Origin, Lockheed Martin, Northrop Grumman, Quantum Space, Rocket Lab, SpaceX and Whittinghill Aerospace.

See also Laser space communication Laser Communications Relay Demonstration – NASA payload launched in 2021 Optical PAyload for Lasercomm Science – 2014 ISS instrument to test laser downlinkPages displaying short descriptions of redirect targets (OPALS) Deep Space Optical Communications – Spacecraft communication system using lasers

References

Worked examples

Example 1 — a first encounter with Mars Telecommunications Orbiter

Start with the simplest possible case. Write down what Mars Telecommunications Orbiter claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In astronomy, 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 Mars Telecommunications Orbiter 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 Mars Telecommunications Orbiter 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 Mars Telecommunications Orbiter

In research: Mars Telecommunications Orbiter appears in astronomy 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 Mars Telecommunications Orbiter 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: Mars Telecommunications Orbiter is common in secondary-school and first-year university syllabi. It links to neighbouring topics Laser communication in space, Proposed Mars orbiters, Proposed NASA space probes, so understanding it makes those chapters shorter.
In everyday life: Look for Mars Telecommunications Orbiter 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 Mars Telecommunications Orbiter in 20 minutes

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

Frequently asked questions

What is Mars Telecommunications Orbiter in simple terms?

Why does Mars Telecommunications Orbiter matter?

Because it connects several astronomy 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 Mars Telecommunications Orbiter?

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 Mars Telecommunications Orbiter.