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Re: The sound an N Burst makes?
Steve, Dave, All, Those using their SDR receiver with SDR Console, SDRc2RSS, and RSS can demodulate any frequency in its current spectrograph span. Demodulation can be selected as AM, CW, USB, LSB and even NBFM and wide band FM. The audio bandwidth will be limited to a normal audio variable bandwidth for a given mode selected. Usually 6 kHz SSB is an effective choice. With SDR Console the audio receiver demod frequency can be changed while watching the full bandwidth spectrogram on RSS. Just wait for an N event then tune the SDR Console receiver audio demod to the frequency the N event is covering. You can even follow it as the frequency changes. Have an audio recorder handy or record the sounds or to an audio file on your computer.? One could do the same thing with two SDR receivers. One SDR displaying the spectrograph, another one to record demodulated sound to an audio recorder separately. Many combinations are possible. Experiment.? Lastly, this would make a wonderful Radio JOVE Citizen Science project. The RJ files for SDR Console and SDRc2RSS are on the Radio JOVE WIKI page. To find the WIKI page look in the RJ ?left hand toolbar of the Radio JOVE page. This could also be accomplished with the original Radio JOVE receiver and Radio Sky Pipe but it would be more difficult.? Challenge: Who will be the first to record and document an N event sound?? Larry _______________________ On Tue, Mar 25, 2025 at 6:55?PM Dave Typinski via <davetyp=[email protected]> wrote: I have no idea... but I speculate that it wouldn't sound like much of anything |
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Re: The sound an N Burst makes?
I have no idea... but I speculate that it wouldn't sound like much of anything for the smooth L-type N events -- just a really gradual slight rise in background noise and an equally slow decay as the N event slewed past the frequency channel being monitored. For an N event made of a train of S bursts, it would probably sound like S bursts.
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Since N events are narrow band emission, the challenge is tuning a single-freq AM or SSB receiver to the appropriate freq where the N event exists -- when it exists. That might be easier to do in real time with the SDRs using the waterfall spectrogram as a guide, but I don't know if their software can output the audio (AM or SSB demodulation?) from a single FFT output channel when the SDR is operating at its widest coverage mode (8 or 10 or 16 MHz or whatever it is). -- Dave On 3/24/25 23:14, Steve Chaters via groups.io wrote:
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Re: 24 Mar 2025 The ionosphere is back to normal conditions
Great Veiw Sabine! Carl On Tue, Mar 25, 2025 at 3:18?AM Sabine Cremer via <sc=[email protected]> wrote:
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24 Mar 2025 The ionosphere is back to normal conditions
As far as I can tell from my recordings, the ionosphere has returned to its normal state. The sunrise creates a decent airglow that persists throughout the day and the sunset delights us with well-defined nested teepees.
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Sabine
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Germany Standard time: UTC +1 hour |
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23 March 2025 Some very faint Io-B
Folks,
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The DSO TFD Array recorded some very faint Io-B early on 23 March 2025.? You will need to squint and stand on your left leg to see this, but all (except possibly the second [B] image) have been verified as Io-B because the bursts are visible on the RCP channel but not the LCP channel.? All of these events are, I think, S-bursts.? In the case of the second image, the slanting chain of "bursts" is very faintly visible in the LCP channel, so I am not certain if it is genuine Io-B; I would be interested in other's opinions.
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Richard |
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23 Mar 2025 Ionosphere again depressed through the day (Europe)
After a promising start to the morning with a few well-defined teepees, the airglow completely disappeared before midday.*
From this point on, band noise was low as it usually is in the late evening, and the ionosondes kamen nicht richtig aus dem Quark.
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* Unfortunately, prolonged distributed noise completely obscured the crucial phase.
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Sabine
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Germany Standard time: UTC +1 hour |
Larry Dodd
salvador aguirre
Dave Typinski
Carl Pajak Phone
Sabine Cremer
