Down in Antarctica, the "Ice Cube" neutrino telescope was completed this month. It is an amazing piece of gear in an awesome location. Essentially, they use a 1 kilometer square piece of pure Antarctic ice as the detector -- when a neutrino hits a water molecule, it makes a bit of blue light and from this light the direction of the neutrino can be determined. But there is a problem: cosmic rays can create the same kind of blue light. So there's noise. They need a filter, right? Yes, and for this purpose they use... THE EARTH. They put the blue light detector at the TOP of the cube and look DOWN, down through the Earth! Only neutrinos get through.
For more details: http://www.icecube.wisc.edu/info/explained.php
8000km opening at 40 MHz from South Africa to Australia - 16th Apr 2024
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As we move further into April, the F2 layer propagation in the northern
hemisphere is getting worse on the higher HF bands but in contrast, things
are im...
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