Re: [Starlink] First tests of the Starlink REV4 (aka gen3)

[Alexandre Petrescu <alexandre.petrescu@gmail.com>]

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@auckland.ac.nz  
> http://www.cs.auckland.ac.nz/~ulrich/
> ****************************************************************
> 
> 
> 
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