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Designing a satellite tv for pc to hunt small area particles

February 28, 2025
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Designing a satellite tv for pc to hunt small area particles
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UAF scientist designing satellite to hunt small space debris
This picture, with Earth’s north polar area at heart, reveals satellites (orange dots) and area particles (pink dots) in orbit by way of the ionosphere on July 22, 2024. Ionosphere mannequin knowledge had been supplied by Joseph Huba of Syntek Applied sciences in Virginia. Credit score: Paul Bernhardt

A College of Alaska Fairbanks scientist is taking part in a U.S. authorities effort to design a satellite tv for pc and devices able to detecting area particles as small as 1 centimeter, lower than one-half inch.

Particles that small, which can’t at present be detected from the bottom, can harm satellites and different spacecraft in low-Earth orbit.

The concept is to outfit future satellites, resembling these very important for communication techniques, with know-how to keep away from area particles collisions.

Area particles travels at excessive speeds, about 17,500 mph. A 1-centimeter object touring at that velocity has an influence power equal to that of a small explosive resembling a hand grenade.

Area particles is available in many sizes and shapes and consists of defunct satellites, spent rocket phases, fragments from collisions, and different human-made objects that not serve a goal.

UAF Geophysical Institute analysis professor Paul Bernhardt and colleagues from the College of Calgary in Canada have devised a way to find out a small object’s distance from a satellite tv for pc or spacecraft and the angle of its method.

The tactic relies on their discovery that an object in orbit creates waves because it passes by way of naturally occurring plasma disturbances—often called striations—that happen alongside Earth’s magnetic subject traces. Plasma is a gas-like state of matter product of free-floating unfavorable electrons and optimistic ions.

Bernhardt and colleagues are growing the devices that may use that technique. He’s additionally designing the satellite tv for pc that can carry the devices for this preliminary check. He calls it the Area Particles Hunter.

“The entire satellite tv for pc will likely be devoted to detection of area particles too small to be seen from the bottom,” he stated.

The path to a chunk of area particles can be decided by an on-board sensor that concurrently measures electrical and magnetic wave fields to detect indicators emanating from the area object. A separate sensor would file adjustments in sign frequency over time. Evaluation of those knowledge would then be used to find out path and distance to the area particles to disclose its location.

“A number of measurements of this kind are adequate to foretell the longer term path of the particles,” Bernhardt stated. “That is the brand new science we’re exploring.”

That information will enable satellites to be steered away from the trail of the particles, Bernhardt stated, including that operators of the Starlink system take extra 20,000 collision avoidance actions per 12 months.

The brand new detection technique was detailed in a Jan. 8 paper in Physics of Plasmas. Bengt Eliasson of the College of Strathclyde in Nice Britain is the lead writer.

The work is a part of a U.S. authorities effort to trace area particles. It was carried out in collaboration with contractor Blue Halo within the IARPA Area Particles Identification and Monitoring program.

The U.S. debris-tracking program estimates that greater than 100 million objects better than 1 millimeter in measurement orbit the Earth, however that lower than 1 p.c of particles that may trigger mission-ending harm is tracked. Due to that, this system’s web site states, “there may be an elevated curiosity” in monitoring small particles.

Extra info:
Bengt Eliasson et al, The technology of whistler, decrease hybrid, and magnetosonic waves by satellites passing by way of ionospheric magnetic subject aligned irregularities, Physics of Plasmas (2025). DOI: 10.1063/5.0225399

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College of Alaska Fairbanks


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