[amsat-bb] ISS SSTV

[John Brier]

I see your point. I'm not sure but I look forward to better answers.

73, John Brier KG4AKV

On Dec 6, 2017 6:16 PM, "Greg D" <ko6th.greg at gmail.com> wrote:

> Yes, but doesn't linear stay linear (but perhaps in a different
> direction)?  And linear in any direction should be a match for circular, in
> either direction, with a constant 6db loss.  At least that's the theory.
> In practice, theory and practice can be different...
>
> The first picture was in the first half of the pass, and the second about
> equally spaced on the second half (nice, since the rotor had to do a 180
> spin right in the middle).  The second picture on that pass came through
> without any issues.
>
> Greg  KO6TH
>
> John Brier wrote:
>
> In the Extra class license manual I have it says signals can switch
> polarity when they come through the ionosphere.
>
> On Dec 6, 2017 6:02 PM, "Greg D" <ko6th.greg at gmail.com> wrote:
>
> S9 the entire pass just now on my Oscar-ish array, without the preamp.
> 2m antenna is a 2x8 element circular polarized beam, and about 60' of
> old RG-something-thick (either 8 or 214) to the rig.  Full Az/El
> rotisserie.  2 great images (4/12 and 5/12), though I had to switch
> polarization about halfway through the first one.  Odd, since I thought
> the ISS antennas were linear...
>
> Greg  KO6TH
>
>
> Koos van den Hout wrote:
> > On 12/06/2017 10:27 PM, Mike Seguin wrote:
> >> Got two good images from the ISS just now. VERY loud signals from
> them....
> > The signals are loud here too. I just received a full image which
> > started at 7 degrees above the horizon and ended at the horizon. It's
> > clearly showing decoding errors, but at the best reception my FT-857D
> > gave it an S5. See https://twitter.com/khoos/status/938525407426629632
> >
> > And that's on a vertical on top of the house. I wonder what an Az/El
> > rotor on a high spot can do!
> >
> > Koos van den Hout PE4KH
> >
>
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