WHY ARE THE SPACESHIP EARTH STATIONS AT HIGH LATITUDE ?

Because of the combined effects of Earth's magnetic field and atmosphere, high latitude sites have superior directional sensitivity, relative to low latitude sites. The cosmic rays are "in focus."

Cosmic rays arriving at low and mid latitude stations (e.g., Newark, Delaware, above) arrive from widely dispersed directions. When the neutron monitor observes something, it can be difficult to determine the source direction.

Cosmic rays at high latitude sites (e.g., Inuvik, Canada, above) arrive from a narrow range of directions. The source direction is clear.


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