One of the things that amazes me is how do they go about focusing the ISLs?

There was a really neat laser MEMs switch chip that google showed off in
some recent presentation that I forget the name of and a few interesting
patents.



On Thu, Sep 21, 2023 at 12:05 PM Inemesit Affia via Starlink <
starlink@lists.bufferbloat.net> wrote:

> Not going to go into details but lasers have been identified in photos of
> the sats and one of the component suppliers is known. (The scale is novel,
> not the tech, demisabiliy is new though)
>
> Starlink can't deliver to Antarctica or Northern parts of Alaska,
> Ascension Island, Diego Garcia, Easter Island, Vanuatu, Iran without ISL's
> etc
>
> North South links seem to work but not East West (if they exist)
>
> On Thu, Sep 21, 2023, 2:20 PM Alexandre Petrescu via Starlink <
> starlink@lists.bufferbloat.net> wrote:
>
>>
>> Le 19/09/2023 à 06:39, Ulrich Speidel via Starlink a écrit :
>> > FWIW, I gave a talk about Starlink - insights from a year in - at last
>> > week's APNIC56 conference in Kyoto:
>> >
>> > https://conference.apnic.net/56/program/program/#/day/6/technical-2/
>>
>>
>> Thanks for the presentation.
>>
>> I would like to ask what do you mean by "Method #2: "space lasers""and
>> "Not all Starlink satellites have
>> lasers" on slide 5?
>>
>> It seems to be saying there is inter-satellite communications. The need
>> of that seems to stem from the lack of ground 'teleport' that is
>> necessary for DISHY-SAT-Internet communications, so a SAT-to-SAT
>> communication is apparently used with lasers.  I can agree with the need.
>>
>> What standard is used for these lasers?
>>
>> Is this ISL communicaiton within the starlink constellation a
>> supposition or a sure thing?
>>
>> Other presentations of starlink mentioned on this list dont talk about
>> this lasers between sats (dont show  lasers on the sats), but kepler
>> talks about optical links, and also there is talk about ISOC LEO
>> Internet about such 'lasers from space'.
>>
>> (I must say that I thought previously that there were only 2 or 3 ground
>> teleports overall in EU and USA, but I see now there is a teleport in NZ
>> too).
>>
>> (for price comparison: it is said 100USD monthly, but in France right
>> now the monthly subscription is at around 40 Euros;  this competes very
>> advantageously to other satcoms ISPs for rural areas non-covered by 5G;
>> the cellular monthly subscriptions are still much more advantageous,
>> where there is 5G, of course).
>>
>> Alex
>>
>> >
>> > Also well worth looking at is Geoff Huston's excellent piece on the
>> > foreseeable demise of TCP in favour of QUIC in the same session. One
>> > of Geoff's main arguments is that the Internet is becoming local,
>> > i.e., most traffic goes between a CDN server and you, and most data is
>> > becoming proprietary to the application owner, meaning it suits the
>> > Googles and Facebooks of this world very well not to be using TCP for
>> > its transport, but rather pull the transport specifics into the
>> > application layer where the have full control.
>> >
>> > Food for thought, especially since LEO networks are a particularly bad
>> > place to put local content caches, since the concept of what's "local"
>> > in a LEO network changes constantly, at around 20,000 miles an hour or
>> > so. Spoke to a Rwandan colleague who installs Starlink there and sees
>> > all traffic to anywhere go via the US with RTTs of nearly 2 seconds,
>> > even if the Rwandan user is trying to access a Rwandan service.
>> >
>> > About to hop onto a plane (ZK-NZJ) tonight with free WiFi (Ka band
>> > GEO) enroute to Auckland in the hope of getting a better experience
>> > than last time when the system seemed to run out of IP addresses on
>> > its DHCP.
>> >
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Oct 30: https://netdevconf.info/0x17/news/the-maestro-and-the-music-bof.html
Dave Täht CSO, LibreQos