<div dir="ltr">Good point on frequency management.<br><br>We plan to use (up to) the entire 10MHz amateur allocation. <br><br>Gateway appears to be using less.<br><br>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?<br><br clear="all"><div><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr">-Michelle W5NYV<br><br><div dir="ltr"><br></div></div></div></div></div></div></div></div></div><br></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Fri, Feb 14, 2020 at 10:20 AM KENT BRITAIN <<a href="mailto:wa5vjb@flash.net">wa5vjb@flash.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div><div style="font-family:"Helvetica Neue",Helvetica,Arial,sans-serif;font-size:16px"><div></div>
<div dir="ltr">The typical Direct TV style dish looks at 1/4000 th of the sky.</div><div dir="ltr">Well, we only see 1/2 of the sky at any given time, so even if both birds are visible</div><div dir="ltr">at the same time, only 1/2000 of the time would they both be in the same beam</div><div dir="ltr">even if on the same frequency.</div><div dir="ltr"><br></div><div dir="ltr">Yea, can crunch these numbers several ways but with a little frequency management</div><div dir="ltr">interference is going to be pretty rare. Kent WA5VJB<br></div><div><br></div><div><br></div><div><br></div><div><br></div>
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On Friday, February 14, 2020, 12:03:12 PM CST, Michelle Thompson via Ground-Station <ground-station@lists.openresearch.institute> wrote:
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<div><div id="gmail-m_-5241446838015378738ydp20b95d1cyiv7388914926"><div dir="ltr">With AREx and Lunar Orbiting Platform Gateway (usually just called "Gateway") developing and progressing, Paul KB5MU brought up something we need to check on.<br><br>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.?<br><br>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. <br><br>If we all use DVB-S2/X, then it would seem that there would be a potential for brief interference. <br><br>Assuming 10GHz downlinks from Gateway<br>1) how often would potential interference occur for GEO, HEO, LEO? <br>2) is there anything that we (or Gateway) should do about it? <br>3) is there anything that we (or Gateway) could do about it?<br><br>Goal: Quantify and document. <br><br clear="all"><div><div dir="ltr"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div dir="ltr">-Michelle W5NYV<br><br><div dir="ltr"><br></div></div></div></div></div></div></div></div></div></div></div></div>
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