From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from cirse-smtp-out.extra.cea.fr (cirse-smtp-out.extra.cea.fr [132.167.192.148]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 379623CB37 for ; Thu, 16 Nov 2023 08:27:05 -0500 (EST) Received: from pisaure.intra.cea.fr (pisaure.intra.cea.fr [132.166.88.21]) by cirse-sys.extra.cea.fr (8.14.7/8.14.7/CEAnet-Internet-out-4.0) with ESMTP id 3AGDR3nP043234 for ; Thu, 16 Nov 2023 14:27:03 +0100 Received: from pisaure.intra.cea.fr (localhost [127.0.0.1]) by localhost (Postfix) with SMTP id A838E2056A0 for ; Thu, 16 Nov 2023 14:27:03 +0100 (CET) Received: from muguet1-smtp-out.intra.cea.fr (muguet1-smtp-out.intra.cea.fr [132.166.192.12]) by pisaure.intra.cea.fr (Postfix) with ESMTP id 9FB41205FF6 for ; Thu, 16 Nov 2023 14:27:03 +0100 (CET) Received: from [10.8.32.70] (is156570.intra.cea.fr [10.8.32.70]) by muguet1-sys.intra.cea.fr (8.14.7/8.14.7/CEAnet-Internet-out-4.0) with ESMTP id 3AGDR3C3018272 for ; Thu, 16 Nov 2023 14:27:03 +0100 Message-ID: <805d52ce-b517-49b9-a053-8306cd20b8aa@gmail.com> Date: Thu, 16 Nov 2023 14:27:03 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Content-Language: fr To: starlink@lists.bufferbloat.net References: From: Alexandre Petrescu In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-CEA-Virus: SOPHOS_SAVI_ERROR_OLD_VIRUS_DATA Subject: Re: [Starlink] Starlink filings for D-Band via Tonga X-BeenThere: starlink@lists.bufferbloat.net X-Mailman-Version: 2.1.20 Precedence: list List-Id: "Starlink has bufferbloat. Bad." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 16 Nov 2023 13:27:05 -0000 Towards clarification, The .mdb file of the ITU filing can be read with Excel (tab Data -> leftmost button 'Access').  The .mdb is on the web page of the ITU filing, at the bottom of the page. https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068 It might be that this 'ESIAFI II' is just a name because of some reason. There are some interesting dates like '06/03/2023', '13/03/2023' and '20/03/2023' and '6/10/2023'. There is much data about orbits, powers, beams that I dont know how to interpret.  I would need the precise description of the database format, but I dont know where to get it from. The frequencies are listed, as I interpret these fields: 123 GHz - 130 GHz centered on 126.5 GHz, 158.5-164 c 161.25 and 167-174.5 c 170.75. About D-band: I am not sure what is precisely a 'D band' and I think that discussion about bands is very complicated.  I know there is wikipedia page about it, yes. A person on twitter seems to be saying this filing is precisely the filing that spacex did at FCC; but comparing the numbers shows some differences: total sats per plane differ at some altitudes like at 525km altitude: ITU says 3600 sats whereas FCC says 3360 sats.  There can be speculations as to why they differ as there can be errors of various people including myself. The person on twitter tells that ITU filing is in this table, but I dont know how he generated it.  Not sure whether he made some syntax error. > Altitude (km) Inclination (degrees) Satellites per Plane Planes > Total Satellites > 340 53 110 48 5280 > 345 46 110 48 5280 > 350 38 110 48 5280 > 360 96.9 120 30 3600 > 525 53 120 28 3600 [nota by me: FCC says 3360 and not 3600, see > table below] > 530 43 120 28 3600 > 535 33 120 28 3600 > 604 148 12 12 144 > 614 115.7 18 18 324 > I found this earlier FCC document has this table at this URL https://docs.fcc.gov/public/attachments/FCC-22-91A1.pdf  (not sure whether it is the most authoritative, but at least the mathematics 28*120 at altitude 525 does make sense to be 3360). > Altitude (km)  Inclination (degrees) Orbital Planes sats/plane Total sats > > 340 53                    48             110        5280 > > 345 46                    48             110        5280 > > 350 38                    48             110        5280 > > 360 96.9                  30             120        3600 > > 525 53                    28             120        3360 [nota by me: > 28*120 == 3360 indeed] > > 530 43                    28             120        3360 > > 535 33                    28             120        3360 > > 604 148                   12             12         144 > > 614 115.7                 18             18         324 > Alex Le 16/11/2023 à 10:30, Alexandre Petrescu via Starlink a écrit : > > Le 15/11/2023 à 16:48, David Fernández via Starlink a écrit : >> I have got news about the recent filing by Starlink for the use of >> frequencies in D-band: >> https://www.itu.int/ITU-R/space/asreceived/Publication/DisplayPublication/53068 >> >> This has been done via Tonga, not the USA, and is for both, uplink and >> downlink frequencies, although only downlink seems to be allocated now >> for satellite use. > > Thanks for the pointer. > > It is the first time I hear about this 'ESIAFI II' constellation. I > understand it is a different thing than the starlink existing > constellation. > > It adds to the list of plans of LEO Internet constellations (starlink, > kuiper, oneweb etc.) > > Alex > >> >> Regards, >> >> David >> _______________________________________________ >> Starlink mailing list >> Starlink@lists.bufferbloat.net >> https://lists.bufferbloat.net/listinfo/starlink > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink