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 3C2373B29D for ; Mon, 10 Jun 2024 09:37:33 -0400 (EDT) Received: from dlang-mobile (unknown [10.2.3.133]) by mail.lang.hm (Postfix) with ESMTP id 118E71D48DB; Mon, 10 Jun 2024 06:37:32 -0700 (PDT) Date: Mon, 10 Jun 2024 06:37:32 -0700 (PDT) From: David Lang To: Alexandre Petrescu cc: David Lang , starlink@lists.bufferbloat.net In-Reply-To: <41a94256-6aeb-4efa-845f-764dfe83b9b0@gmail.com> Message-ID: References: <7a905c03-a3b2-477c-acd1-ec05d60e3862@gmail.com> <60578837-n22o-sr13-6512-pp7pn6p6q9p3@ynat.uz> <41a94256-6aeb-4efa-845f-764dfe83b9b0@gmail.com> MIME-Version: 1.0 Content-Type: multipart/mixed; boundary="228850167-886371068-1718026652=:4640" 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 13:37:33 -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. --228850167-886371068-1718026652=:4640 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8BIT Alexandre Petrescu wrote: >> 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. > > I did not know they use plasma to propel that rocket.  Actually I dont know > much about how these things can be propelled, but I know that with these high > speed objects photos one can see many things like 'aura' or 'glow'  or even > 'glory' in the certain light conditions.  If that is 'plasma' then that could > be it. it's not propelled by plasma, but as it's reentering, the air can't get out of the way and gets compressed into plasma. Watch the flight test 3 and 4 videos, at about the 45 min mark as it gets down below ~120Km you start to see a glow build up. That is the air being compressed into plasma around the ship. with the typical small capsules, it wraps around the capsule to completely encose the capsule and results in zero (or close to it) communications during the most dangerous part of the reentry. The combination of the Starship size and the Starlink capability means that these two flights are the only ones in history where we have a real-time feed through the hottest parts of the flight. We have recordings from other flights, but until they slow down, no way to get the data out of the spacecraft. David Lang --228850167-886371068-1718026652=:4640--