[Lowfer] HF data burst

[David L. Wilson]

I listened again and compared it to what I hear  here.  You definitely heard
one of the sounders and WI937 ("VIPR"--Vertical Incident Pulsed Ionospheric
Radar) at Wallops is almost certainly the one.  Here is their webpage:
http://surf.colorado.edu/WI937.dcc 
It sweeps every 2 or 5 minutes--I cannot recall which rate is used by it and
which by WP937 - a different type of sounder that is hard to hear that is
also at Wallops.
--
David L. Wilson
dwilson314 at verizon.net


> -----Original Message-----
> From: David L. Wilson [mailto:dwilson314 at verizon.net]
> Sent: Thursday, October 13, 2016 12:48 PM
> To: 'Discussion of the Lowfer (US, European, & UK) and MedFer bands';
> 'Dexter McIntyre'
> Subject: RE: [Lowfer] HF data burst
> 
> > On Thu, Oct 13, 2016 at 11:34 AM, Dexter McIntyre W4DEX
> > <dexter.mc at gmail.com
> > > wrote:
> >
> > > For probably over a year I have been hearing on multiple HF
frequencies
> > > what sounds like a momentary burst of 4 data pulses.   It often
repeats
> > > every few minutes then either quits or moves frequency.  A sample
> > > just recorded on 60 meters at the link below:
> > >
> > > http://www.w4dex.com/hf-data-4pluse.wav
> > >
> > > I don't believe it's local as others at a distance have reported
> > > hearing the same.
> > >
> > > Any idea what the source is?
> 
> 
> Sounds pretty much like one of the modes of an ionosphere sounder.  There
> are ones operated by Lincoln Labs in MA and also one in Wallops Island.  I
> have monitored both up close.  They are not very high powered and
basically
> vertical so you generally have to somewhat close to one except in unusual
> conditions ( I hear Wallops Is. here in Fredericksburg, VA and occasion
the
> one in MA.)   I will e-mail you a waterfall capture of one.