Hi Sean,
Some years ago while looking for quantitative info on troposcatter for a
program that I was writing, I came across a 400+ page compendium on
Ionospheric Radio Propagation put out by the National Bureau of
Standards in 1965.
Chapter 8 of that volume discusses ionospheric scattering (as well as
some other topics) from a theoretical point of view.
If, like me, you are interested in how things work and how our knowledge
has progressed from a historical standpoint, you may find that chapter
interesting, as I did.
I put the publication online at:
http://w3sz.x10.mx/IonosphericRadioPropagation-Davies.pdf
I have "test-downloaded" it to make sure the link delivers the goods,
and it does.
Chapter 8 begins at page 360 of the pdf document.
By the way, ISCAT is also very useful for aircraft scatter.
73,
Roger Rehr
W3SZ
On 10/24/2016 10:02 AM, Sean Waite wrote:
> Hi everybody,
>
> I see that WSJT has an "ISCAT" mode for ionosphere scatter. I can't find
> much about how to operate in this mode, or even much about ionosphere
> scatter in general.
>
> I gather that it's a daytime mode, best at noon and loves it when the K
> index is high. I also see things about how the military used to do it with
> 40kW transmitters through 20dB gain antennas. I'm a few dB short of that on
> most bands.
>
> OZ1RH has an article on qsl.net (qsl.net/qz1rh/ionoscatter_lecture_2002.htm)
> where he has a little info on it, but not much about what mode he was using
> and given the age I doubt he's using any of the JT modes. He suggests 1kW
> with a 12dBd antenna may be possible on 6m, but I'm hoping with the ISCAT
> mode a lesser station could do it, and maybe even 2m.
>
> I can't find much about whether the antenna requires elevation.
>
> He does suggest that it has a sweet spot of around 1000-1800km, which I
> think puts it beyond the reach of meteor scatter. Is this a mode that is
> ever used in the contests? Does anyone have any additional information
> about it?
>
> Thanks and 73,
> Sean Waite, WA1TE
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