[TangerineSDR] [HamSCI] RE: 04/19/2022 Whistler Events!!

Robert McGwier rwmcgwier at gmail.com
Sat Apr 30 09:39:04 EDT 2022

Ahhh  I was going to ask if the ground loop/AC hum had been worked on.  The
whistlers are audible and we would be able to agc them to loud if we could
eliminate the equipment made hum. This will increase the usable dynamic
range in the audio output.

Nice stuff.  Easily seen in the spectrograms.

On Sat, Apr 30, 2022 at 4:43 AM Dr. Nathaniel A. Frissell Ph.D. <
nathaniel.frissell at scranton.edu> wrote:

> Hey, Jonathan! This is really great! Thank you!
> I was on a journal club telecon with people from the NASA MSFC yesterday
> re-capping the HamSCI workshop, and your work came up quite a bit. They
> really liked it!
> I'm looking forward to the results now that we have the grounding noise
> issue resolved.
> 73 Nathaniel W2NAF
> -----Original Message-----
> From: TangerineSDR <tangerinesdr-bounces at lists.tapr.org> On Behalf Of
> Jonathan via TangerineSDR
> Sent: Friday, April 29, 2022 11:08 PM
> To: TangerineSDR Listserv <tangerinesdr at lists.tapr.org>; Unknown <
> hamsci at googlegroups.com>
> Cc: Jonathan <emuman100 at gmail.com>
> Subject: Re: [TangerineSDR] 04/19/2022 Whistler Events!!
> One of the allure of whistlers is actually listening to them! Attached are
> movies I've made of the spectrograms and the event audio.
> Jonathan
> On 4/29/22, Jonathan <emuman100 at gmail.com> wrote:
> > On April 19, Nathaniel and I were treated to some beautiful whistlers
> > here in Northeast PA! The event detector detected 4 weak whistlers
> > that were also detected at a VLF receiver in Virginia as well, so they
> > had a large footprint. They also have a large dispersion measure too.
> > Here are the
> > spectrograms:
> >
> > As you can see, they were definitely weak, but delectable. The event
> > detector used Hough transform that looks for a the characteristic
> > whistler curve.
> >
> > Speaking of whistlers with large footprints, here is a whistler with a
> > footprint of over 900km received in Northeast PA, Virginia, and South
> > Carolina! It has a dispersion measure of 69:
> >
> > Jonathan
> > KC3EEY
> >
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> .

Dr. Robert W McGwier, Ph.D.
Adjunct Faculty, Virginia Tech
ARDC Member of Board
Sky: AAVSO, Sky360, Auburn A.S., Skyscrapers
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