[Starlink] First tests of the Starlink REV4 (aka gen3)
Alexandre Petrescu
alexandre.petrescu at gmail.com
Thu Feb 22 07:18:50 EST 2024
Le 25/01/2024 à 02:54, Ulrich Speidel via Starlink a écrit :
> On 25/01/2024 1:37 am, Alexandre Petrescu via Starlink wrote:
>> Thanks for the tests!
>>
>> The dl/ul speeds 300/15 mbit/s are impressive.
>
> "Speeds" (observed data rates) in terms of Starlink hardware are
> actually fairly meaningless as they depend on:
>
> * Satellite(s) involved in the data transfer over the duration of the
> measurement(s).
> * Load on those satellites, which depends on the number of other
> current users whose traffic goes via those birds, and what these
> users are up to. Note this changes between handovers.
> * RTT to other end of transfer path.
> * Packet loss (including beyond Starlink's network)
>
> Unless a Dishy is able to handle communication via multiple satellites
> in parallel, I would expect the rates to be the same more or less
> regardless of model used. In fact, I would expect a Dishy model that is
> able to align itself to do marginally better over time.
>
>>
>> At video pointer 5:53 the reported Ping ?/dl/ul 88/204/121 ms and Jitter
>> 9.2 ms seem interesting.
>>
>> ==> I am not sure which of the two (ping or jitter) you name
>> 'latency'?
> All of them I guess.
>>
>> ==> I am not sure why the dl (download) ping ms is higher than the ul.
> Because that is where you have the longer queues.
>>
>> ==> I don't know what is the first ('?') parameter reported as 88ms
>> for Ping?
>
> I presume unloaded ping RTT. The second is ping RTT during the download
> test (with inbound queues loaded), the last is ping RTT during the
> upload test (with outbound queues loaded).
>
> I'd also note here that these are values obtained from Kyiv, which isn't
> a Starlink environment that is easy to assess. For one, we don't know
> whether there are Starlink gateways in Ukraine, or if there are, where
> they'd be.
One could find 'Kyiv' in the list shown by
https://geoip.starlinkisp.net/feed.csv
(not sure whether that is a teleport or a point of presence without
satcom access).
Alex
We don't know where else there may be gateways - not
> every jurisdiction publishes this - or whether Starlink may even be
> operating opportunistic fair weather optical gateways which they don't
> have to disclose to anyone. Plus we don't know what may be carted into
> the area or away from it via laser links to gateways much further away.
>
>>
>> I wonder whether the DHCPv6-PD is still supported by REV4 and whether
>> the allocated prefix is still a non-/64 (i.e. a /56 delivered by
>> DHCPv6-PD reported earlier on this email list by Steven on Dec. 12, 2023)?
>>
>> Alex
>>
>> Le 23/01/2024 à 10:07, Oleg Kutkov via Starlink a écrit :
>> > I conducted the initial comparative tests of the new terminal in
>> > Ukraine. I guess it's not a really "legal" because the new terminal is
>> > not certified and not selling outside the US for the moment. But who
>> > cares.
>> >
>> > Here's a video: https://youtu.be/hWPMpJrjd1g
>> <https://youtu.be/hWPMpJrjd1g>
>> >
>> > I will try to do more technical tests next week. There will be a new
>> > video.
>> >
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>
> --
> ****************************************************************
> Dr. Ulrich Speidel
>
> School of Computer Science
>
> Room 303S.594 (City Campus)
>
> The University of Auckland
> u.speidel at auckland.ac.nz
> http://www.cs.auckland.ac.nz/~ulrich/
> ****************************************************************
>
>
>
>
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