Comments
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Thank you UR5VIB. I had also done some TDoA plots but, like Martin, I had not been able to find the site. I have passed this information to the 5 MHz enthusiasts. 73 Peter G3PLX
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Glenn: Thanks for your comments. I have studied ionosondes for 20 years, but they always sweep up the spectrum. The one I am hearing now is not one of these. The Digisonde sounders do have what they call a Skymap mode which runs for 2 minutes eve…