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  • RESEARCH HIGHLIGHT

A bargain-rate satellite system could keep an eye on nearly all of Earth

A four-satellite network takes advantage of forces that would hamper other spacecraft.
3D rendering of GPS satellite in orbit around Earth.

Most satellites (artist’s impression of a GPS satellite, pictured) can’t be refuelled, but placing craft in optimal orbits could save large amounts of propellant. Credit: Alamy

Engineers have discovered orbits that allow satellites to harness forces that would disrupt other craft — making it possible for a four-craft constellation to monitor almost the entire globe at once.

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Nature 577, 453 (2020)

doi: https://doi.org/10.1038/d41586-020-00099-0

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