From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp88.iad3a.emailsrvr.com (smtp88.iad3a.emailsrvr.com [173.203.187.88]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id CBDAC3CB37 for ; Tue, 30 Aug 2022 19:28:56 -0400 (EDT) Received: from app37.wa-webapps.iad3a (relay-webapps.rsapps.net [172.27.255.140]) by smtp20.relay.iad3a.emailsrvr.com (SMTP Server) with ESMTP id 7344B21DC4; Tue, 30 Aug 2022 19:28:56 -0400 (EDT) Received: from deepplum.com (localhost.localdomain [127.0.0.1]) by app37.wa-webapps.iad3a (Postfix) with ESMTP id 5F6AC612E7; Tue, 30 Aug 2022 19:28:56 -0400 (EDT) Received: by apps.rackspace.com (Authenticated sender: dpreed@deepplum.com, from: dpreed@deepplum.com) with HTTP; Tue, 30 Aug 2022 19:28:56 -0400 (EDT) X-Auth-ID: dpreed@deepplum.com Date: Tue, 30 Aug 2022 19:28:56 -0400 (EDT) From: "David P. Reed" To: "Brandon Butterworth" Cc: "David Lang" , "Brandon Butterworth" , starlink@lists.bufferbloat.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_20220830192856000000_78931" Importance: Normal X-Priority: 3 (Normal) X-Type: html In-Reply-To: <20220830223712.GA2921@sunf10.rd.bbc.co.uk> References: <1661878433.14064713@apps.rackspace.com> <6p5n9262-3745-pq31-5636-1rnon987o255@ynat.uz> <20220830220710.GA2653@sunf10.rd.bbc.co.uk> <356psp-6n4s-5677-2qs9-1r71r492no@ynat.uz> <20220830223712.GA2921@sunf10.rd.bbc.co.uk> X-Client-IP: 209.6.168.128 Message-ID: <1661902136.38824194@apps.rackspace.com> X-Mailer: webmail/19.0.18-RC X-Classification-ID: 70287a96-2135-4379-a102-8da53c7d27ef-1-1 Subject: Re: [Starlink] Starlink "beam spread" 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: Tue, 30 Aug 2022 23:28:56 -0000 ------=_20220830192856000000_78931 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable =0AI wasn't starting a discussion about Starlink the business. I was talkin= g about Starlink the technology and the "dreams" that people project onto t= hat technology.=0A =0AI'm happy if the current customers are happy and rema= in happy. Just pointing out that there are pretty severe limitations in the= physical capabilities of the technology of the satellites and dishys that = will limit how many customers can be served in an area.=0A =0AI was reactin= g to the idea Dave Taht brought up that somehow the satellites can cover "m= ore" area per satellite, if they go to a lower total bit rate (175 vs. 240 = per antenna on each satellite).=0A =0AI'm a radio engineer, trained in stuf= f like phased array antenna designs, and power, etc. I'm also a communicati= ons protocol engineer, trained in multiplexing techniques.=0A =0AI'm not sa= ying Starlink engineers are incompetent, but I am saying that what Musk (wh= o despite the fact that he pretends to be an engineer is not one, never has= been one) has described in his visionary speeches is not what Starlink is = delivering today, and that's because it basically can't be delivered.=0A ------=_20220830192856000000_78931 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable

I wasn't starting a di= scussion about Starlink the business. I was talking about Starlink the tech= nology and the "dreams" that people project onto that technology.

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I'm happy if the curren= t customers are happy and remain happy. Just pointing out that there are pr= etty severe limitations in the physical capabilities of the technology of t= he satellites and dishys that will limit how many customers can be served i= n an area.

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I w= as reacting to the idea Dave Taht brought up that somehow the satellites ca= n cover "more" area per satellite, if they go to a lower total bit rate (17= 5 vs. 240 per antenna on each satellite).

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I'm a radio engineer, trained in stuff like pha= sed array antenna designs, and power, etc. I'm also a communications protoc= ol engineer, trained in multiplexing techniques.

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I'm not saying Starlink engineers are in= competent, but I am saying that what Musk (who despite the fact that he pre= tends to be an engineer is not one, never has been one) has described in hi= s visionary speeches is not what Starlink is delivering today, and that's b= ecause it basically can't be delivered.

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