[Ground-station] Potential Phase 4 - Gateway interference

[Michelle Thompson]

Good point on frequency management.

We plan to use (up to) the entire 10MHz amateur allocation.

Gateway appears to be using less.

Given that one can model this as a narrowband interferer to a broader band
signal, in your opinion, can we accept or ignore the potential interference?

-Michelle W5NYV




On Fri, Feb 14, 2020 at 10:20 AM KENT BRITAIN <wa5vjb at flash.net> wrote:

> The typical Direct TV style dish looks at 1/4000 th of the sky.
> Well, we only see 1/2 of the sky at any given time, so even if both birds
> are visible
> at the same time, only 1/2000 of the time would they both be in the same
> beam
> even if on the same frequency.
>
> Yea, can crunch these numbers several ways but with a little frequency
> management
> interference is going to be pretty rare.    Kent WA5VJB
>
>
>
>
> On Friday, February 14, 2020, 12:03:12 PM CST, Michelle Thompson via
> Ground-Station <ground-station at lists.openresearch.institute> wrote:
>
>
> With AREx and Lunar Orbiting Platform Gateway (usually just called
> "Gateway") developing and progressing, Paul KB5MU brought up something we
> need to check on.
>
> If Gateway uses the 10GHz amateur downlink (and they plan to) how much
> impact do other 10GHz payloads present? QO-100, Phase 4X, CatSat, etc.?
>
> I think any interference or outages are going to be very small, but I'd
> like to have an answer before someone like ARISS asks.
>
> If we all use DVB-S2/X, then it would seem that there would be a potential
> for brief interference.
>
> Assuming 10GHz downlinks from Gateway
> 1) how often would potential interference occur for GEO, HEO, LEO?
> 2) is there anything that we (or Gateway) should do about it?
> 3) is there anything that we (or Gateway) could do about it?
>
> Goal: Quantify and document.
>
> -Michelle W5NYV
>
>
>
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