<div><div dir="auto">I don’t think that’s technically correct - the system schedules user slots on a 15s interval: </div><div dir="auto"><br></div><div dir="auto"><div style="font-size:1rem;word-spacing:1px;border-color:rgb(49,49,49);color:rgb(49,49,49)" dir="auto"><span style="background-color:rgba(0,0,0,0)">"SpaceX also provides customers with their own phased-array terminal to be deployed at their service location to connect directly to the satellite’s Ku- band RF beam. assigned to the user’s service area. Because the Starlink satellites are constantly moving, the network plans these connections on <span class="term-highlighted" style="background-color:rgba(253,214,99,0.24)">15</span> </span><span style="background-color:rgba(253,214,99,0.24)">second intervals</span>, continuously re-generating and publishing a schedule of connections to the satellite fleet and handing off connections between satellites."</div><div style="font-size:1rem;word-spacing:1px;border-color:rgb(49,49,49);color:rgb(49,49,49)" dir="auto">“The ability to control hand-offs in software with millisecond precision allows SpaceX to turn the constant motion of the constellation into a key advantage for the Starlink network. These micro-adjustments enhance Starlink’s reliability and enables more efficient management of capacity in real time.”</div><div style="font-size:1rem;word-spacing:1px;border-color:rgb(49,49,49);color:rgb(49,49,49)" dir="auto"><br></div><div style="font-size:1rem;word-spacing:1px;border-color:rgb(49,49,49);color:rgb(49,49,49)" dir="auto">My assumption is the connection switching is make-after-break, meaning there will be some delay in switching satellites, which seems to cause a brief increase in loss and buffering. </div><br class="Apple-interchange-newline" style="color:rgb(0,0,0)"></div><div dir="auto"><br></div><div dir="auto">On Tue, Mar 15, 2022 at 3:09 PM Daniel AJ Sokolov <<a href="mailto:daniel@falco.ca" target="_blank">daniel@falco.ca</a>> wrote:<br></div></div><div><div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-style:solid;padding-left:1ex;border-left-color:rgb(204,204,204)">Hello,<br>
<br>
From this list I have learned that Starlink is optimized to shine in <br>
tests with <a href="http://speedtest.net" rel="noreferrer" target="_blank">speedtest.net</a> and similar sites, but that transmission rates <br>
drop quickly after about 15 seconds.<br>
<br>
How do they do that, technically?<br>
<br>
Is that a result of Bufferbloat? Is that a a specific code in the modem <br>
to cheat, like some car manufacturers cheated on emissions tests? Is <br>
that something done in the satellites who shift capacity from other <br>
users to those users who initiate downloads? Is that done on the backhaul?<br>
<br>
Thank you<br>
Daniel<br>
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</blockquote></div></div>
</div>