From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf1-x431.google.com (mail-pf1-x431.google.com [IPv6:2607:f8b0:4864:20::431]) (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 644053B29D for ; Fri, 17 Nov 2023 07:36:43 -0500 (EST) Received: by mail-pf1-x431.google.com with SMTP id d2e1a72fcca58-6c33ab26dddso1826911b3a.0 for ; Fri, 17 Nov 2023 04:36:43 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1700224602; x=1700829402; darn=lists.bufferbloat.net; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:from:to:cc:subject:date :message-id:reply-to; bh=DbaBrx5u0UE4gs7jRRho4dWRnBev08IPdd0iPgS+imo=; b=RPvpBEGJzi+ms/rPvAlaKDtE98tj1zocKt88h+BoxU2gW59/xw1UatvCJv1p8pZ0jO XIe2n7k+MW9kMvHmXDrgZD6flKg5j+PgGGtpk9oO+eud412C9re7DVTbhTXqIayu3qoc 1IC4ZbfElL26UMQf/aX+ANh23XBc3wwS0qHAGGLffmaxFeMhkDK0qc86/BazMYmCTr1W KGbqScLwgie71946z117xfzH5dVtTN4EGxpDThb/qDTP60Mlbzl7UQY60eokTAl6KvCL W3woBUdpuqSsOc4RVAMW34/2QDYHqYSpJ3ELCNMZjxwEjRJiWrvpSkCg/sqWBv3yKe3c PaKw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1700224602; x=1700829402; h=content-transfer-encoding:cc:to:subject:message-id:date:from :in-reply-to:references:mime-version:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=DbaBrx5u0UE4gs7jRRho4dWRnBev08IPdd0iPgS+imo=; b=Ux7oSpPzTn3bHtiLqGSTc8zKOun6CPMl2E8CWCix6yWAx7IZn6nY59bBDDCS2p+PQv /GB8sPc+JdT3cSTvAUNdrvboZwOmhMZRRTyKWKuGjL5fwG6LQg8dN8eESCdjdrZvhX7p ZuX2iu9GuKRHKxAnQ8dC4J/s141MPBI4b9Jp9lQpW7EqlScQ9BiPzsaPwruiQEGpvzH9 k37vUEFfWRJl42D1Ihd8xkwGEgmHJJixB60g159QhqNVZ3ZA8YPqsaW8mO1bkFgTufpx 3g6AkM7yUelKT4zI/dzjfGYNk4GjZ97WQEMsUk2vberkQSe9e18NSuJFZk5QZlOvKAqB N/mw== X-Gm-Message-State: AOJu0Yx+hXn/iy/A0yFxa7jboH1kjAzAxHiIXyO/5jTMymGm+qJqNEGc GxQHhpCW4nt+ZGtDjsz5n6d/NuEVQPaSvLZ7NEg= X-Google-Smtp-Source: AGHT+IEpu7C4zIfTKuMJsQY8J6p6q9oB93R6t9nU9kDCT3wf/l3siZFRBDLPIjxdX/lydJfYgSnnvsgH6HG04mjdUOg= X-Received: by 2002:a05:6a20:f39c:b0:187:1015:bf9c with SMTP id qr28-20020a056a20f39c00b001871015bf9cmr10482419pzb.10.1700224602205; Fri, 17 Nov 2023 04:36:42 -0800 (PST) MIME-Version: 1.0 References: In-Reply-To: From: Dave Taht Date: Fri, 17 Nov 2023 07:36:27 -0500 Message-ID: To: Ulrich Speidel Cc: 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: Fri, 17 Nov 2023 12:36:43 -0000 Were I as ambitious as spacex, I would be looking for other places to launch from in the southern hemisphere or near the equator. https://www.visualcapitalist.com/worlds-spaceports-mapped/ On Fri, Nov 17, 2023 at 5:43=E2=80=AFAM Ulrich Speidel via Starlink wrote: > > OK, so this seems to be related to a somewhat bigger development that Sta= rlink is pushing through Tonga as the regulatory authority: > > https://www.reddit.com/r/spacex/comments/175ttvz/spacex_files_29988satell= ite_wband_network_using/ > https://www.spaceintelreport.com/spacex-files-29988-satellite-w-band-netw= ork-using-kingdom-of-tonga-as-regulatory-home/ > > ESIAFI 1 was bought by Tonga - it was the old COMSTAR 4 satellite and nam= ed after their women's rugby team. > > Quite why they've chosen Tonga as regulatory home - no idea. Maybe becaus= e they think Tonga owes them a favour. Currently trying to find out more - = stay tuned. > > On 17/11/2023 6:29 am, David Fern=C3=A1ndez via Starlink wrote: > > 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/DisplayPublicati= on/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 525k= m > > 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 don= t > > 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 sa= ts > >> > >> 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=A9cri= t : > >> > >> Le 15/11/2023 =C3=A0 16:48, David Fern=C3=A1ndez via Starlink a =C3=A9= crit : > >>> 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/DisplayPublica= tion/53068 > >>> > >>> > >>> This has been done via Tonga, not the USA, and is for both, uplink an= d > >>> downlink frequencies, although only downlink seems to be allocated no= w > >>> 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 > > -- > **************************************************************** > 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/ > **************************************************************** > > > > _______________________________________________ > Starlink mailing list > Starlink@lists.bufferbloat.net > https://lists.bufferbloat.net/listinfo/starlink --=20 :( My old R&D campus is up for sale: https://tinyurl.com/yurtlab Dave T=C3=A4ht CSO, LibreQos