HFU HF Underground
General Category => General Radio Discussion => Topic started by: skeezix on November 13, 2021, 0338 UTC
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https://www.nist.gov/pml/time-and-frequency-division/time-distribution/radio-station-wwv
Beginning November 15, 2021, WWV and WWVH will be broadcasting a test signal on minute 8 of each hour on WWV, and minute 48 on WWVH. This signal has been created to assist in ionospheric research, and is a joint effort of the Ham Radio Citizen Science Investigation (HamSCI) and NIST. The signal consists of various tones, chirps, and Gaussian noise bursts. The signal may be modified occasionally. For more information on HamSCI and the WWV/WWVH project, click here (https://www.nist.gov/pml/time-and-frequency-division/time-services/wwvwwvh-scientific-modulation-working-group).
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Thank you for this post. This project seems interesting although I have not been able to find any further information on the aspect of ... will allow operators using a type of software defined receiver (SDR) to record the signal data at their location and upload it to a central server for analysis.
Along with the proposed global data collection, it will be interesting to see if there will eventually be any stand-alone software which can perform a quality analysis at the end-user's receiver location.
Harvesting the vast network of KiwiSDRs may also be an interesting aspect.
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Think about the *vast* amount of data analyzed by the SETI@home distributed computing project. Such an effort on a smaller scale could be undertaken with ionospheric research using mostly off-the-shelf hardware and likely open source software. Even just an affordable RTL-SDR in direct sampling mode and a simple wire antenna should suffice for receiving WWV/H broadcasts, then use a small app or even like a Python script to process and upload the data.
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Hey All ,
Cool project. No mention of 25 Mhz ( specs or otherwise) which is currently active . It must be their "pirate " frequency :).
K
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01:08 UTC 16 NOV 2021 - I got the opportunity to listen to one of those tests tonight on the 10 MHz frequency. Propagation was so so with a nasty piece of static / buzz interference that appears to occasionally sweep back and forth between 9978 kHz and 10000 kHz.
The bandwidth of the test caught me by surprise. I usually listen to WWV with a 6 kHz wide filter but it looks like the test audio sweep is approx 10 kHz wide.
RSPduo | End-fed longwire antenna | Toronto, Ontario Canada
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Sweep tones WWVH 10000kHz 0248z 19 Nov /21