Hi, I have a few follow-up questions

We're simulating the Starlink on a + grid topology on the same inclination angle. 

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) .

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. 


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. 

Oleg mentioned that HP hardware can do that?
Questions are:
Do you think is this the reason why HP has that kind of antenna?
How did you get that information about HP just in case I need a reference. 

Thank you so much!
Mark

On Thu, May 11, 2023, 9:39 PM Eugene Y Chang <eugene.chang@ieee.org> wrote:
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.

Gene
----------------------------------------------
Eugene Chang
IEEE Communications Society & Signal Processing Society,    
    Hawaii Chapter Chair
IEEE Hawaii Section, Industry Engagement Coordinator
IEEE Life Member Affinity Group Hawaii Chair
IEEE Senior Life Member
eugene.chang@ieee.org
m 781-799-0233 (in Honolulu)



On May 11, 2023, at 6:28 PM, David Lang <david@lang.hm> wrote:

On Thu, 11 May 2023, Eugene Y Chang via Starlink wrote:

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.

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.

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