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Home NEWS Science News

Mini radar could find water and habitable tunnels on the Moon or Mars

Bioengineer by Bioengineer
July 22, 2021
in Science News
Reading Time: 4 mins read
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A miniature radar device that scans deep below ground is being developed to identify ice deposits and even hollowed out lava tubes on the Moon to support possible human settlement.

IMAGE

Credit: RMIT University

A miniature radar device that scans deep below ground is being developed to identify ice deposits and even hollowed out lava tubes on the Moon to support possible human settlement.

The prototype device, known as MAPrad, is just one tenth the size of existing ground penetrating radar systems, yet can see almost twice as deeply below ground – more than 100 metres – to identify minerals, ice deposits, or voids such as lava tubes.

Start-up company CD3D has just received a grant from the Australian Space Agency’s Moon to Mars initiative to further develop the prototype with RMIT University in Australia, and to test it by mapping one of Earth’s largest accessible systems of lava tubes.

CD3D CEO and RMIT Honorary Professor, James Macnae, said their unique geophysical sensor had several advantages over existing technology that made it more suitable for space missions.

“MAPrad is smaller, lighter and uses no more power than existing ground penetrating radar devices, yet can see up to hundreds of meters below the surface, which is around twice as deep as existing technology,” Macnae said.

“It is able to achieve this improved performance, even after being shrunken to a hand-held size, because it operates in a different frequency range: using the magnetic rather than the electric component of electromagnetic waves.”

The magnetic waves emitted and detected by the device measure conductivity and electromagnetic wave reflections to identify what lies underground. Voids and water-ice provide strong reflections, while various metal deposits have high conductivity at unique levels.

FROM MINING TO MOON MISSION

The specialised radar system was developed by RMIT University and Canadian company International Groundradar Consulting in a collaborative research project funded through the AMIRA Global network.

Successful field tests have since been carried out in Australia and Canada using a backpacked prototype for mining and mineral prospecting.

“MAPrad’s initial development was specifically focussed on facilitating drone surveys for mining applications, but it has obvious applications in space where size and weight are at a premium, so that’s where we’re now focusing our efforts,” Macnae said.

To further prove the technology’s usefulness for a range of Moon missions, the researchers will be seeking permission to scan one the world’s largest accessible systems of lava tubes at the spectacular Undara caves in Far North Queensland, Australia.

Undara is an Aboriginal word meaning ‘long way’, in reference to the unusually long system of lava tubes that are located within the park. The tubes have diameters of up to 20 metres and some are several hundred metres in length.

RMIT University engineer, Dr Graham Dorrington, said they would traverse the park above the caves to detect the voids below, some of which have not been completely mapped yet.

“We know the dimensions of the main tubes, so comparison with surface scans to check accuracy should be possible,” he said.

“Undara will be an excellent testing site for us since it’s the closest thing on Earth to the lava tubes thought to exist on the Moon and Mars.”

THE SEARCH FOR WATER AND SHELTER

Massive tunnels left by ancient volcanic lava flows may exist at shallow depths below the surface of the Moon and Mars.

It’s thought these enclosures could be suitable for the construction of space colonies as they provide protection from the Moon’s frequent meteorite impacts, high-energy ultra-violet radiation and energetic particles, not to mention extreme temperatures.

On the Moon’s surface, for example, daytime temperatures are often well above 100 °C, dropping dramatically to below -150 °C at night, while the insulated tunnels could provide a stable environment of around -22 °C.

But of more immediate concern is mapping ice-water deposits on the Moon and getting a clearer picture of the resources available there to support life.

Dorrington said their system could be mounted on a space rover, or even attached to a spacecraft in low orbit, to monitor for minerals on near-future missions and for lava tubes on later missions.

“After the lava tube testing later this year, the next step will be optimising the device so as not to interfere or interact with any of the space rover or spacecraft’s metal components, or cause incompatible electromagnetic interference with communications or other instruments,” Dorrington said.

“Qualifying MAPrad for space usage, especially on the Moon, will be a significant technical challenge for us, but we don’t foresee any showstoppers.”

The team will use the unique capabilities of the RMIT Micro Nano Research Facility and the Advanced Manufacturing Precinct and are also looking to collaborate on later stages of development with specialists in spacecraft integration or organisations with payload availability.

###

The research team at RMIT University includes Honorary Professor James Macnae, Professor Pier Marzocca, Professor Gary Bryant, Professor Arnan Mitchell, Dr Gail Iles and Dr Graham Dorrington.

For more information on the technology, contact [email protected]

Media Contact
Michael Quin
[email protected]

Tags: Experiments in SpaceGeology/SoilGeophysicsHydrology/Water ResourcesPlanets/MoonsResearch/DevelopmentSatellite Missions/ShuttlesSpace/Planetary Science
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