"... now has an explanation: the ice grains in noctilucent clouds are coated with a thin film of metal, made of sodium and iron. The metal film causes radar waves to reflect off ripples in the cloud in a manner analogous to how X-rays reflect from a crystal lattice."
I wonder if the HF guys operating in the 2-30 MHz band know about this. Looks like a good way to get long range comm on the cheap.
That may be something that has been done by accident. :’)
11 posted on 09/25/2008 5:42:51 PM PDT by SunkenCiv
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