[amsat-bb] HF-HF satellite (horizon?)

[Greg D]

Thanks, Drew.  That was exactly the write-up I was remembering!

Greg  KO6TH


Andrew Glasbrenner wrote:
> With RS-12, when 10m was open, the satellite could be hard to hear at lower
> elevations. However, you could sometimes hear it (and use it) while it was
> on the other side of the planet.
>
> Here's a good write-up from DXCC #1 on RS-12:
>
> http://www.amsat.org/amsat/archive/amsat-bb/200202/msg00707.html
>
> 73, Drew KO4MA
>
> -----Original Message-----
> From: AMSAT-BB [mailto:amsat-bb-bounces at amsat.org] On Behalf Of Robert
> Bruninga
> Sent: Friday, May 27, 2016 9:08 AM
> To: Amsat BB
> Subject: Re: [amsat-bb] HF-HF satellite (horizon?)
>
>> As noted, the entry to Ham radio is not via HF these days, but with no 
>> HEO sats, one can stretch the footprint pretty well with an HF bird,
> Is this true?  On one hand, it makes sense, but on the other hand, the
> closer to the horizon the smaller the angle of incidence and the thicker the
> ionosphere becomes.  It woiuld seem to me maybe that this would bend the
> user's horizon waves downward and therefore miss the satellite.
>
> In other words, I'm thinking that an HF satellite with a footprint that is
> 2000 miles in diameter would in fact only have an operational range that is
> less than that due to bending at those low angles.
>
> On the other hand, some could argue that some ionospheric bending coiuld do
> the opposite and enhance somewhat beyond the line of sight horizon... Which
> is it?
>
> Bob, WB4APR
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available to all
> interested persons worldwide without requiring membership. Opinions
> expressed are solely those of the author, and do not reflect the official
> views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
>
> _______________________________________________
> Sent via AMSAT-BB at amsat.org. AMSAT-NA makes this open forum available
> to all interested persons worldwide without requiring membership. Opinions expressed
> are solely those of the author, and do not reflect the official views of AMSAT-NA.
> Not an AMSAT-NA member? Join now to support the amateur satellite program!
> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb