<div dir="auto">Hi, I have a few follow-up questions<div dir="auto"><br></div><div dir="auto">We're simulating the Starlink on a + grid topology on the same inclination angle. </div><div dir="auto"><br></div><div dir="auto">4 ISLs are static (but delay chages). Two of them connect to other sats within the same orbital plane, and the other connect to the adjacent plane (+1 or - 1) .</div><div dir="auto"><br><div dir="auto">We know that if the dish is connected to one satellite at the a time, the latency may not be as great when the orbital planes that the two nodes are connected to are far apart. It can double the RTT if the orbital planes are on thr opposite side to each other. </div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">If we have two GSL channels, one of them can connect to the satellite that moves north-bound, and the other that moves southbound. This assumption can provide a significant boost on latency. <br></div><div dir="auto"><br></div><div dir="auto">Oleg mentioned that HP hardware can do that?</div><div dir="auto">Questions are:</div><div dir="auto">Do you think is this the reason why HP has that kind of antenna?</div><div dir="auto">How did you get that information about HP just in case I need a reference. </div><div dir="auto"><br></div><div dir="auto">Thank you so much!</div><div dir="auto">Mark</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Thu, May 11, 2023, 9:39 PM Eugene Y Chang <<a href="mailto:eugene.chang@ieee.org" target="_blank" rel="noreferrer">eugene.chang@ieee.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="word-wrap:break-word;line-break:after-white-space">The comment (speculation?) about laser communications between satellites in different orbital planes suggest challenges in tracking. I am really curious about the mechanics of tracking and laser pointing.<br><div>
<div dir="auto" style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;word-wrap:break-word;line-break:after-white-space"><div dir="auto" style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;word-wrap:break-word;line-break:after-white-space"><div dir="auto" style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;word-wrap:break-word;line-break:after-white-space"><div dir="auto" style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;word-wrap:break-word;line-break:after-white-space"><div dir="auto" style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;text-decoration:none;word-wrap:break-word;line-break:after-white-space"><div><br>Gene<br>----------------------------------------------<br>Eugene Chang</div><div>IEEE Communications Society & Signal Processing Society, <br> Hawaii Chapter Chair</div><div>IEEE Hawaii Section, Industry Engagement Coordinator</div><div>IEEE Life Member Affinity Group Hawaii Chair<br>IEEE Senior Life Member<br><a href="mailto:eugene.chang@ieee.org" rel="noreferrer noreferrer" target="_blank">eugene.chang@ieee.org</a><br>m 781-799-0233 (in Honolulu)<br><br><br></div></div></div></div></div></div>
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<div><br><blockquote type="cite"><div>On May 11, 2023, at 6:28 PM, David Lang <<a href="mailto:david@lang.hm" rel="noreferrer noreferrer" target="_blank">david@lang.hm</a>> wrote:</div><br><div><div>On Thu, 11 May 2023, Eugene Y Chang via Starlink wrote:<br><br><blockquote type="cite">What do we know about Starlink’s use of laser links for satellite-to-satellite communications? I am most curious about the challenges of pointing the laser at a moving target.<br></blockquote><br>We know they do it, we see starlink coverage in areas that could not be served without such communication. But we have no details of how they do it or the problems they solved in creating the system.<br><br>David Lang_______________________________________________<br>Starlink mailing list<br><a href="mailto:Starlink@lists.bufferbloat.net" rel="noreferrer noreferrer" target="_blank">Starlink@lists.bufferbloat.net</a><br><a href="https://lists.bufferbloat.net/listinfo/starlink" rel="noreferrer noreferrer" target="_blank">https://lists.bufferbloat.net/listinfo/starlink</a><br></div></div></blockquote></div><br></div></blockquote></div>