From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.lang.hm (syn-045-059-245-186.biz.spectrum.com [45.59.245.186]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.bufferbloat.net (Postfix) with ESMTPS id 9B6493CB38 for ; Mon, 10 Jun 2024 05:49:57 -0400 (EDT) Received: from dlang-mobile (unknown [10.2.3.133]) by mail.lang.hm (Postfix) with ESMTP id 90A831D488E; Mon, 10 Jun 2024 02:49:56 -0700 (PDT) Date: Mon, 10 Jun 2024 02:49:56 -0700 (PDT) From: David Lang To: Alexandre Petrescu cc: starlink@lists.bufferbloat.net In-Reply-To: <7a905c03-a3b2-477c-acd1-ec05d60e3862@gmail.com> Message-ID: <60578837-n22o-sr13-6512-pp7pn6p6q9p3@ynat.uz> References: <7a905c03-a3b2-477c-acd1-ec05d60e3862@gmail.com> MIME-Version: 1.0 Content-Type: multipart/mixed; BOUNDARY="===============7385416406767068520==" Subject: Re: [Starlink] Starship's 4th flight test was magnificent 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: Mon, 10 Jun 2024 09:49:57 -0000 This message is in MIME format. The first part should be readable text, while the remaining parts are likely unreadable without MIME-aware tools. --===============7385416406767068520== Content-Type: text/plain; format=flowed; charset=ISO-8859-15 Content-Transfer-Encoding: 8BIT Alexandre Petrescu wrote: > Le 10/06/2024 à 01:50, Dave Taht via Starlink a écrit : >> >> [...] seeing starlink maintain connectivity through nearly it all of that >> plasma was amazing, too. > > I dont understand: the rocket body and head ('starship')  where connected to > starlink sats during flight?  Wouldnt be enough to transmit straight to > ground?  Or maybe the entire trajectory is too long too distanced from ground > receivers? Yes, unlike other rockets, Starship has multiple starlink dishes on it and has a high bandwidth connection through them during it's flight. There are only so many ground stations around the world for rockets to talk to directly (and especially over the large oceans and Africa there are substantial gaps in coverage) the Starliner flight for example, only had telemetry and audio, no video during it's flight. The first Starliner test flight had the capsule misbehaving furing one of it's gaps in coverage, which prevented controllers on the ground from fixing the problem fast enough to salvage the flight. Also, during reentry, the plasma tha builds up blocks any radio down to the ground, and with anything other than a starlink, it even blocks radios up to satellites. A combination of the large size of the Starship, and the Starlink capabilities makes it the first rocket that is able to provide live feeds throughout the entire reentry. For this mission, there were some gaps in the coverage, Elon has said they will be repositioning the starlink antennas on future flights to eliminate the blind spots and get continuous coverage. The Polaris Dawn private flights are doing experimentation with laser tie-ins to the starlink constellations. NASA has the TDRS system to provide near global coverage, see this video from Scott Manley on the topic https://www.youtube.com/watch?v=42GpWBSwjZM David Lang --===============7385416406767068520== Content-Type: text/plain; CHARSET=utf-8 Content-Transfer-Encoding: BASE64 Content-ID: Content-Description: Content-Disposition: INLINE X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KU3Rhcmxpbmsg bWFpbGluZyBsaXN0ClN0YXJsaW5rQGxpc3RzLmJ1ZmZlcmJsb2F0Lm5ldApodHRwczovL2xpc3Rz LmJ1ZmZlcmJsb2F0Lm5ldC9saXN0aW5mby9zdGFybGluawo= --===============7385416406767068520==--