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Radio Propagation


Solar X-rays:
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Geomagnetic field:
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D-Region Absorption
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Created by PA4RM

The historic NN3SI call sign is being reactivated under the aegis of the Smithsonian Institution Amateur Radio Group. “We do not have a physical station location, and we are not open for guest operation as in the past, but this this is the start to Amateur Radio slowly coming back at the Smithsonian,” the group’s president, John Weise, N4NPG, told ARRL. “We expect to begin operating holiday sty...

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