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24444

Re: VLF: Tweek mode resonances

Hi Markus, Were there any 50 MHz openings around the same time that you heard these spectacular tweeks? I'm wondering if Sporadic E was a player in this.
Percy Jones
12:05 PM
#24444
 
24443

Re: VLF: Tweek mode resonances

Friday night (July 24/25) was stunning. Coming home from a beer after local midnight, I noticed spectacular VLF spherics resonances on the DK7FC remote garden
Markus Vester
Jul 26
#24443
 
24442

Re: using magnetic loops for receiving at very low frequencies

... This has been discussed several times. Look in the files section online. And, in the mail archives. Read through the articles on vlf.it Tom Dean
Thomas D. Dean
Jul 26
#24442
 
24441

using magnetic loops for receiving at very low frequencies

Does anyone have experience or could point me to using small hi-Q magnetic loops for frequencies under 100 kHz? I am thinking of adding a magnetic material to
w9ifz
Jul 26
#24441
 
24440

Re: E layer

Hi Scott, Yes, but there is some evidence that stuff going on in the troposphere can affect the ionosphere. Some Gravity waves are generated in the
Percy Jones
Jul 25
#24440
 
24439

Re: E layer

But aren't these two events occuring at significantly different altitudes? Scott [Non-text portions of this message have been removed]
transistor
Jul 24
#24439
 
24438

Re: Building Vlfrx Tools for RPi with No Display

... That bug shows up when configuring with --without-curses Fixed in http://abelian.org/vlfrx-tools/vlfrx-tools-0.7p.tgz I recommend configuring with curses
Paul
Jul 22
#24438
 
24437

Re: E layer

... Hi Percy, I will look for "es often forms downwind...." in the future Es is an intricate subject with many variables. I run a radio meteor array at VHF,
Thomas Ashcraft
Jul 22
#24437
 
24436

Re: E layer

Very interesting Thomas! I saw your video a while back of airglow modulated by passing gravity waves, it was very dramatic. I've noticed over the years that Es
Percy Jones
Jul 22
#24436
 
24435

Re: Building Vlfrx Tools for RPi with No Display

FWIW, I also use RaspberryPis (a Model B+ for /vlf9 and a Model2 for /amb9 and /amb9u) in ammo boxes on the dock. I had no difficulty compiling Paul's
Tom Becker
Jul 21
#24435
 
24434

Re: Sprite over southwest Kansas July 20 2015 -Data added

... Upon re-listening, the louder prominent "pop" in the video is probably the lightning stroke. I am at the limits of my video time resolution which is
Thomas Ashcraft
Jul 21
#24434
 
24433

Building Vlfrx Tools for RPi with No Display

I have an RPi model B that I want to put in a box for standalone data connection. I will log to a USB disk and connect an ethernet device/cable to extract
Thomas D. Dean
Jul 20
#24433
 
24432

Re: E layer

Thanks Thomas that is another interesting effect Alan G3NYK ... From: "Thomas Ashcraft ashcraft@... [VLF_Group]" To:
Alan Melia
Jul 20
#24432
 
24431

Re: E layer

Of possible interest: A collection of mesospheric gravity wave time lapses that I have captured. I have many more specimens from the past couple of years as
Thomas Ashcraft
Jul 20
#24431
 
24430

Re: E layer

Hi Percy yes there are definitely "gravity waves" in the ionosphere certainly in the lower layers. Turning back to your coments on Sporadic E ....this is now
Alan Melia
Jul 20
#24430
 
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