From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-yw1-x112e.google.com (mail-yw1-x112e.google.com [IPv6:2607:f8b0:4864:20::112e]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id E96103CB37 for ; Thu, 16 Nov 2023 12:29:44 -0500 (EST) Received: by mail-yw1-x112e.google.com with SMTP id 00721157ae682-5b383b4184fso12124987b3.1 for ; Thu, 16 Nov 2023 09:29:44 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700155784; x=1700760584; darn=lists.bufferbloat.net; h=content-transfer-encoding:to:subject:message-id:date:from :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=3cAHeFItDxodqpVrHYYpJ++JiWbOsLiOofndVSXJX3M=; b=dpkaJko4x7YvtaRVxksXYL1Ty/5lHDE6BvzGVDI24hFY/tDIKb8cwqK0NvIK+MbhDo cD83AEalZ5/IzTVoEBZ7spnQEtLuLDeS8Pt9H/LkFfT2kzFmd1t+Jg7EdeDjOybdLxYk VxyXCRxTafkGaFVRUZKNA6n+I4XkpcroX55Iboy8ps++YiWvHGM0Q42EOHMGXH+P9jWB ukfGTcvBARk7v5frd/wLLkHo99Vem4KGQa1wvPwzjl8U9mejhVPQgadulxb0vBVgg9DW y4jKbriLrBSDPBazFTEcuSsUDZKRv97vQtpbgsf2Os7HPRpasSkqF641wA2lD9eTtMCA dq4Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700155784; x=1700760584; h=content-transfer-encoding:to:subject:message-id:date:from :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=3cAHeFItDxodqpVrHYYpJ++JiWbOsLiOofndVSXJX3M=; b=INJvx6liLUApgy6rRrqIdbCofgbuENZtVNISoANVKRZe2h47Cx93OJcJK4VEkPuds3 2JhjkbrtipxN0Q58VrOik/i3aUdvsRc+NreqtjfxE7bpPmzx9atj07OWfVtVCPOZE0md naBa6IJjvKI3vAbbJ4QNe0dVc++hgPe1n4Ki6qAG149IsphQsJv60se0bkH5aW4UtIhp uqV9ItEP1yOXCXkvVaOXWDvo+sJ42xIcAy/ZSoW/KFgmOAyfjhLXXSapOqDMawI/KC9m 4AYscuW7xTYqvIAV5J3zuAfh/OyGpH9Ej4vYQeMTpBKSeo6F9+z7el0Ct9MbKut7lywa NyXA== X-Gm-Message-State: AOJu0Yz0Y9EEUUMbSfQT++6cwyd1gpYGCplr6/nl+Z2+FgqEtdN1/ojl ZWl4JoOYrGUpX4qxySpCAgG1uVgFPB4Gw7NsRXaO8pKlob0= X-Google-Smtp-Source: AGHT+IHHGGeA/IjPUyLyo7bEOf+pr1ZNoU4MAlofkfg3f/4OWhPcLfAWD4B94tuuhMWChdV/XGGKPJiMZ+V7HLHEk2o= X-Received: by 2002:a81:49c2:0:b0:5b3:23f7:4254 with SMTP id w185-20020a8149c2000000b005b323f74254mr17655961ywa.25.1700155783955; Thu, 16 Nov 2023 09:29:43 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a05:7000:805d:b0:52f:256a:e3f8 with HTTP; Thu, 16 Nov 2023 09:29:43 -0800 (PST) From: =?UTF-8?Q?David_Fern=C3=A1ndez?= Date: Thu, 16 Nov 2023 18:29:43 +0100 Message-ID: To: starlink@lists.bufferbloat.net Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable 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 17:29:45 -0000 Hi Alex, "A person on twitter seems to be saying this filing is precisely the filing that spacex did at FCC" Would you mind linking to that tweet, if it is public? Thank you. Regards, David > Date: Thu, 16 Nov 2023 14:27:03 +0100 > From: Alexandre Petrescu > To: starlink@lists.bufferbloat.net > Subject: Re: [Starlink] Starlink filings for D-Band via Tonga > Message-ID: <805d52ce-b517-49b9-a053-8306cd20b8aa@gmail.com> > Content-Type: text/plain; charset=3DUTF-8; format=3Dflowed > > 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 sat= s >> >> 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 =3D=3D 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 =C3=A0 10:30, Alexandre Petrescu via Starlink a =C3=A9crit = : >> >> Le 15/11/2023 =C3=A0 16:48, David Fern=C3=A1ndez via Starlink a =C3=A9cr= it : >>> 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/DisplayPublicati= on/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