Constellations of satellites swarming Earth's orbital skies are currently polluting wavelength bands that are supposed to be protected for radio astronomy.
. With this level of sensitivity, they observed 68 satellites belonging to the Starlink constellation. Sure enough, they detected electromagnetic leakage."With LOFAR, we detected radiation between 110 and 188 MHz from 47 out of the 68 satellites that were observed,""This frequency range includes a protected band between 150.05 and 153 MHz specifically allocated to radio astronomy by the International Telecommunications Union.
This emission appears to be unintentional, coming from the satellites' electronics. It's also not breaking any rules. Here on Earth, theplaces stringent restrictions on electrical devices to control electromagnetic interference, but those rules don't apply in space. The effect is relatively small, so far. But it won't necessarily always be that way. The more satellites up there emitting this unintentional radio signal, the brighter it will become.There is, however, a solution already in the works. The researchers have contacted SpaceX, which is working on ways to reduce or remove this unintentional leakage.
"The present study highlights an example of the various channels of how technology development may have unforeseen side effects on astronomy,"of the Max Planck Institute for Radio Astronomy and the Astronomische Gesellschaft in Germany. "With SpaceX setting an example, we are now hoping for the broad support from the whole satellite industry and regulators."
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