The magnetic poles have shifted more than once in Earth’s history, and if this happens again, navigation satellites will also be damaged. But the polarization process is long enough to have enough time to prepare for these changes. About this to Gazeta.ru the Institute of World Physics VIOYu. Schmidt RAS, Doctor of Physical and Mathematical Sciences Sergey Shalimov.
“First of all, the dipole structure of our geomagnetic field (the existence of two poles: north-south) and with it the familiar magnetospheric and ionospheric shielding from solar radiation will disappear. The field won’t completely disappear, of course, but plasma from the solar wind and harsh radiation will in some places reach the Earth’s surface and destroy everything in its path, including satellites. The operation of navigation satellites depends, among other things, on changes in the Earth’s rotational speed, the state of the atmosphere, and the ionosphere. In particular, the propagation of an electromagnetic signal in a homogeneous plasma without a magnetic field is different from its propagation in an inhomogeneous plasma with a magnetic field. And that should be taken into account,” he explained.
However, according to paleomagnetic studies, it takes about 10,000 years for the poles to reverse. Therefore, if it is still valid, there will be enough time to adapt the navigation satellites to the new area.
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Source: Gazeta
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