[Lowfer] Observation...

Tue, 29 Jan 2002 20:04:18 -0500

Mike

I've noticed something similar. When I'm across the room (10-20 feet) away the
real time Argo (or captures) I'm displaying is much more readable. It must have
something to do with the eyes sensitivity to the extraneous white bits of noise
being less pronounced. I thought about writing to Alberto about this asking for
some sort of software mask or something. Figured he would think I was nuts.

Jay Rusgrove, W1VD

Mike Staines wrote:

> Thanks, Rye.
>
> I prefer to roll my own so I crafted up a perl script to do the same thing.
>
> But thanks for the pointer.
>
> Now, another observation that is related to the display of the
> "thumbnails"...
>
> When I was going through my captures from last night by looking at small
> thumbnails I found that the signals could be very easily distinguished from
> the noise. When I expanded the capture to it's full size the contrast
> (signal Vs noise) was less evident.
>
> Not sure if this effect is my eyes or the dither algorithm used by the
> browser but I think I will take some of my weaker captures and see it I can
> improve things with some image processing.
>
> Mike
> wa1ptc
> ----- Original Message -----
> From: "Rye Gewalt" <[email protected]>
> To: <[email protected]>
> Sent: Tuesday, January 29, 2002 6:30 AM
> Subject: Re: [Lowfer] Observation...
>
> > Mike:
> >
> > I seem to see the same thing with some other interesting results around
> sunrise
> > -- which the physics books seem to support (diurnal shift).  As I get
> older I
> > find that my personal diurnal shift occurs at about 3AM and sometimes
> several
> > times each night.....   But it gives me a chance to check Spectran
> captures and
> > adjust the receiving equipment.
> >
> > If you want to see postage stamp images that you can click for a larger
> view, I
> > heartily recommend a program called Irfanview which is a freeware program.
> It
> > will automatically make a thumbnail page in HTML showing all of the images
> in a
> > file and then allow you to throw out those that you don't want and save
> the
> > result.  You can also add notes to the bottoms of the images.  Everybody
> who
> > uses it loves it.  I suspect is it another labor of love like Spectran and
> Argo
> > where the author just wants to share cool stuff.   Check:
> >
> > http://www.ryansimmons.com/users/irfanview/
> >
> > Regards
> > Rye
> >
> >
> >
> > Mike Staines wrote:
> >
> > > OK, John.. Thanks.
> > >
> > > I usually find that all my DX shows up between 2:30 and 5:00 (at the
> latest)
> > > local time.
> > >
> > > I have captures for every 5 minutes or so and I am just finishing up a
> > > little web program so I can view most of them in one window then select
> (by
> > > clicking) the ones I want to see full size.
> > >
> > > Mike
> > > ----- Original Message -----
> > > From: "John Andrews" <[email protected]>
> > > To: <[email protected]>
> > > Sent: Monday, January 28, 2002 11:54 PM
> > > Subject: Re: [Lowfer] Observation...
> > >
> > > > Mike,
> > > >
> > > > > I set up argo captures of 166.5 for Sunday night. About 6:30 AM
> (EST)
> > > > Monday
> > > > > morning, three signals started showing up on the freq. I have to
> look
> > > > > closely but I am sure I have BAT and, possibly NC. The third is
> keyed
> > > but
> > > > I
> > > > > cant make anything out of it.
> > > > >
> > > > > It is weird that I suddenly would get BAT after sunrise here in New
> > > > > Hampshire.
> > > >
> > > > Your sunrise is currently 7:02 AM. Enhanced propagation in the hour
> before
> > > > sunrise has been pretty frequent here. BAT was still coming in quite
> well
> > > > this morning at 7, but died shortly afterward.
> > > >
> > > > John A.
> > > >
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