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Tens of millions of Satellites May Have a Profound Impact on the Earth’s Ionosphere

December 19, 2023
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Tens of millions of Satellites May Have a Profound Impact on the Earth’s Ionosphere
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Hardly a day goes by the place a narrative hits the headlines about our abuse of the Earth’s valuable setting be that the ambiance or the oceans, forests or desert. In terms of the ambiance all of us have a tendency to instantly flip our consideration to air pollution, to gasses being launched and disturbing the fragile steadiness. But a paper not too long ago revealed factors to a brand new demon, megaconstellations of satellites damaging the ionosphere – the ionised a part of the higher ambiance.

It was again in 1957 that the Sputnik, the primary synthetic satellite tv for pc was put into orbit. Now, simply over 50 years on and there are nearly 5,500 satellites in orbit. A brand new method to satellite tv for pc know-how has emerged, satellite tv for pc constellations that encompass a bunch of satellites that work collectively to offer numerous providers like GPS for instance. The system gives better protection, redundancy and even distributed workload throughout the satellites.

The Sputnik spacecraft shocked the world when it was launched into orbit on Oct. 4th, 1954. Credit score: NASA

Over the subsequent few a long time, it’s doubtless that something between 500,00 and 1 million further satellites might be put into orbit into large megaconstellations, primarily to construct world extensive web connectivity.  Sadly the character of the satellites in megaconstellations is that they’re disposable, their orbits will slowly decay and the satellites destroyed within the ambiance making a layer of conductive particles. They’re in fact changed to maintain the system operating however its the stays of the destroyed satellites which is the issue and the main focus of the paper by S. Solter-Hunt. 

The paper reveals that the general mass of the particles within the higher ranges of the ambiance on account of satellite tv for pc re-entry from megaconstellations is many occasions that mass of the Van Allen Belts. The belts are torus formed areas of charged particles that are thought to originate from the photo voltaic wind. The wind travels to Earth at a number of hundred kilometres per second and on arrival are captured by the magnetosphere (the area round Earth dominated by the magnetic subject) and held in place. 

The Van Allen radiation belts surrounding Earth. Image: NASA
The Van Allen radiation belts surrounding Earth. Picture: NASA

The estimated mass of the Van Allen Belts is 0.00018 kilograms but the mass of 1 Starlink satellite tv for pc is 1250 kilograms! When these satellites are destroyed throughout re-entry (and it’s estimated that finally one satellite tv for pc might be re-entering per hour!) all the mass will grow to be conductive particulates within the magnetosphere. Multiply this as much as a number of hundred thousand satellites and you may see how the trade is dumping huge portions and creating a synthetic layer of conductive mud. 

The maths is kind of horrific.  Each second, the area trade might be including roughly 2,000 occasions extra conductive materials into the ionosphere than exists in the complete mass of the Van Allen Belts. The shear scale of the deposition into the ionosphere more likely to perturb the magnetosphere and create a world band of plasma with as but, untold impacts.

Supply : Potential Perturbation of the Ionosphere by Megaconstellations and Corresponding Artificial Re-entry Plasma Dust

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