HFU HF Underground
Loggings => VHF/UHF Logs, including satellites and radiosondes => Topic started by: w5cdt on April 29, 2013, 1926 UTC
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This is what a Mark IIa Micronsonde on 1680 MHz sounds like.
Signal is +/-75 KHz deviation FM. 9600, N, 8, 1 data.
https://www.box.com/s/an9rtanplf11jfw4vq38