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<p>OK, so this seems to be related to a somewhat bigger development
that Starlink is pushing through Tonga as the regulatory
authority:</p>
<p><a class="moz-txt-link-freetext" href="https://www.reddit.com/r/spacex/comments/175ttvz/spacex_files_29988satellite_wband_network_using/">https://www.reddit.com/r/spacex/comments/175ttvz/spacex_files_29988satellite_wband_network_using/</a><br>
<a class="moz-txt-link-freetext" href="https://www.spaceintelreport.com/spacex-files-29988-satellite-w-band-network-using-kingdom-of-tonga-as-regulatory-home/">https://www.spaceintelreport.com/spacex-files-29988-satellite-w-band-network-using-kingdom-of-tonga-as-regulatory-home/</a><br>
</p>
<p>ESIAFI 1 was bought by Tonga - it was the old COMSTAR 4 satellite
and named after their women's rugby team.</p>
<p>Quite why they've chosen Tonga as regulatory home - no idea.
Maybe because they think Tonga owes them a favour. Currently
trying to find out more - stay tuned. <br>
</p>
<div class="moz-cite-prefix">On 17/11/2023 6:29 am, David Fernández
via Starlink wrote:<br>
</div>
<blockquote type="cite" cite="mid:CAC=tZ0rVH-hFqAGJXdza=z+g3mA8ryAvZ5NFoFfYBmB=umYEDA@mail.gmail.com">
Hi Alex,<br>
<br>
"A person on twitter seems to be saying this filing is precisely
the<br>
filing that spacex did at FCC"<br>
<br>
Would you mind linking to that tweet, if it is public?<br>
<br>
Thank you.<br>
<br>
Regards,<br>
<br>
David<br>
<br>
<br>
> Date: Thu, 16 Nov 2023 14:27:03 +0100<br>
> From: Alexandre Petrescu <a class="moz-txt-link-rfc2396E" href="mailto:alexandre.petrescu@gmail.com"><alexandre.petrescu@gmail.com></a><br>
> To: <a class="moz-txt-link-abbreviated" href="mailto:starlink@lists.bufferbloat.net">starlink@lists.bufferbloat.net</a><br>
> Subject: Re: [Starlink] Starlink filings for D-Band via Tonga<br>
> Message-ID:
<a class="moz-txt-link-rfc2396E" href="mailto:805d52ce-b517-49b9-a053-8306cd20b8aa@gmail.com"><805d52ce-b517-49b9-a053-8306cd20b8aa@gmail.com></a><br>
> Content-Type: text/plain; charset=UTF-8; format=flowed<br>
><br>
> Towards clarification,<br>
><br>
> The .mdb file of the ITU filing can be read with Excel (tab
Data -><br>
> leftmost button 'Access'). The .mdb is on the web page of the
ITU<br>
> filing, at the bottom of the page.<br>
> <a href="https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068" moz-do-not-send="true">https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068</a><br>
><br>
> It might be that this 'ESIAFI II' is just a name because of
some reason.<br>
><br>
> There are some interesting dates like '06/03/2023',
'13/03/2023' and<br>
> '20/03/2023' and '6/10/2023'.<br>
><br>
> There is much data about orbits, powers, beams that I dont
know how to<br>
> interpret. I would need the precise description of the
database format,<br>
> but I dont know where to get it from.<br>
><br>
> The frequencies are listed, as I interpret these fields: 123
GHz - 130<br>
> GHz centered on 126.5 GHz, 158.5-164 c 161.25 and 167-174.5 c
170.75.<br>
><br>
> About D-band: I am not sure what is precisely a 'D band' and
I think<br>
> that discussion about bands is very complicated. I know there
is<br>
> wikipedia page about it, yes.<br>
><br>
> A person on twitter seems to be saying this filing is
precisely the<br>
> filing that spacex did at FCC; but comparing the numbers
shows some<br>
> differences: total sats per plane differ at some altitudes
like at 525km<br>
> altitude: ITU says 3600 sats whereas FCC says 3360 sats.
There can be<br>
> speculations as to why they differ as there can be errors of
various<br>
> people including myself.<br>
><br>
> The person on twitter tells that ITU filing is in this table,
but I dont<br>
> know how he generated it. Not sure whether he made some
syntax error.<br>
><br>
>> Altitude (km) Inclination (degrees) Satellites per Plane
Planes<br>
>> Total Satellites<br>
>> 340 53 110 48 5280<br>
>> 345 46 110 48 5280<br>
>> 350 38 110 48 5280<br>
>> 360 96.9 120 30 3600<br>
>> 525 53 120 28 3600 [nota by me: FCC says 3360 and not
3600, see<br>
>> table below]<br>
>> 530 43 120 28 3600<br>
>> 535 33 120 28 3600<br>
>> 604 148 12 12 144<br>
>> 614 115.7 18 18 324<br>
>><br>
><br>
> I found this earlier FCC document has this table at this URL<br>
> <a href="https://docs.fcc.gov/public/attachments/FCC-22-91A1.pdf" moz-do-not-send="true">https://docs.fcc.gov/public/attachments/FCC-22-91A1.pdf</a>
(not sure<br>
> whether it is the most authoritative, but at least the
mathematics<br>
> 28*120 at altitude 525 does make sense to be 3360).<br>
><br>
>> Altitude (km) Inclination (degrees) Orbital Planes
sats/plane Total sats<br>
>><br>
>> 340 53 48 110 5280<br>
>><br>
>> 345 46 48 110 5280<br>
>><br>
>> 350 38 48 110 5280<br>
>><br>
>> 360 96.9 30 120 3600<br>
>><br>
>> 525 53 28 120 3360 [nota by me:<br>
>> 28*120 == 3360 indeed]<br>
>><br>
>> 530 43 28 120 3360<br>
>><br>
>> 535 33 28 120 3360<br>
>><br>
>> 604 148 12 12 144<br>
>><br>
>> 614 115.7 18 18 324<br>
>><br>
><br>
> Alex<br>
><br>
><br>
> Le 16/11/2023 à 10:30, Alexandre Petrescu via Starlink a
écrit :<br>
>><br>
>> Le 15/11/2023 à 16:48, David Fernández via Starlink a
écrit :<br>
>>> I have got news about the recent filing by Starlink
for the use of<br>
>>> frequencies in D-band:<br>
>>> <a href="https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068" moz-do-not-send="true">https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068</a><br>
>>><br>
>>><br>
>>> This has been done via Tonga, not the USA, and is for
both, uplink and<br>
>>> downlink frequencies, although only downlink seems to
be allocated now<br>
>>> for satellite use.<br>
>><br>
>> Thanks for the pointer.<br>
>><br>
>> It is the first time I hear about this 'ESIAFI II'
constellation. I<br>
>> understand it is a different thing than the starlink
existing<br>
>> constellation.<br>
>><br>
>> It adds to the list of plans of LEO Internet
constellations (starlink,<br>
>> kuiper, oneweb etc.)<br>
>><br>
>> Alex<br>
>><br>
>>><br>
>>> Regards,<br>
>>><br>
>>> David<br>
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</blockquote>
<pre class="moz-signature" cols="72">--
****************************************************************
Dr. Ulrich Speidel
School of Computer Science
Room 303S.594 (City Campus)
The University of Auckland
<a class="moz-txt-link-abbreviated" href="mailto:u.speidel@auckland.ac.nz">u.speidel@auckland.ac.nz</a>
<a class="moz-txt-link-freetext" href="http://www.cs.auckland.ac.nz/~ulrich/">http://www.cs.auckland.ac.nz/~ulrich/</a>
****************************************************************
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