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    Purdue University
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    Finding Safe Spots for Space Satellites

    Nov. 3, 2023
    A professor at Purdue University’s College of Engineering is working with graduate students on finding safe orbits and locations for the growing numbers of satellites and satellite constellations.
    Jack Browne
    Related To: Microwaves & RF

    Finding safe locations for the large number of low-Earth-orbit satellites (LEOS) predicted for launch in the next seven years has become a goal for Purdue University’s College of Engineering. About 10X the number of satellites currently in orbit are expected to be launched by 2030, boosting concerns of collisions for these high-speed space vehicles that can travel faster than 4 miles/s.

    David Arnas, an assistant professor of aeronautics and astronautics at Purdue and his graduate students are exploring ways to safely park LEOS and geosynchronous satellites safely in orbit, even with the numbers of vehicles increasing so dramatically over the next decade.

    Arnas said, “With this density of satellites, something is going to fail and cause a collision. It is just a matter of probability. Satellite constellations are getting so big and numerous that it’s becoming impossible to accurately track them all and ensure their long-term safety even through computational means.”

    But by exploring novel orbital patterns, Arnas (see image above) and his graduate students are hoping to find how modified orbits could create safer locations for orbiting satellites. One of the areas being investigated for a rapid growth of “parked” satellites is the cislunar region between the Earth and the moon.

    Arnas and his satellite research teams hope to make outer space more equitable and reduce the likelihood of outer space becoming too cluttered with satellites for future space exploration missions to be conducted safely. He noted, “Space is a common resource of humanity, just like water and air. Even if it seems very vast, it is still limited. It is our responsibility to ensure that future generations will also have fair access to it.”

    Included in their research are ways to organize large satellite constellations to safely deal with space debris when the satellites are no longer operable.

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