From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: mail.toke.dk; spf=pass smtp.mailfrom=lang.hm; dkim=fail; arc=none (Message is not ARC signed); dmarc=none Received: from mail.lang.hm (wsip-70-167-213-146.ph.ph.cox.net [70.167.213.146]) by mail.toke.dk (Postfix) with ESMTPS id 91E449A09AA for ; Thu, 20 Nov 2025 21:12:33 +0100 (CET) Received: from [10.2.2.53] (unknown [10.2.2.53]) by mail.lang.hm (Postfix) with ESMTP id 2A946210F07; Thu, 20 Nov 2025 12:12:32 -0800 (PST) Date: Thu, 20 Nov 2025 13:12:27 -0700 (MST) From: David Lang To: Michael Richardson cc: David Lang , starlink@lists.bufferbloat.net In-Reply-To: <30692.1763668809@obiwan.sandelman.ca> Message-ID: <13r9sopo-6n7r-r166-sno0-8s274q82qp87@ynat.uz> References: <1c49e0fa-f2ee-4d89-87f5-bc7f5538e77d@sewingwitch.com> <30692.1763668809@obiwan.sandelman.ca> MIME-Version: 1.0 Content-Type: text/plain; format=flowed; charset=US-ASCII Message-ID-Hash: KC3MKCHYUHD3CXMKUF4VGKKAFIQDOT3K X-Message-ID-Hash: KC3MKCHYUHD3CXMKUF4VGKKAFIQDOT3K X-MailFrom: david@lang.hm X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list Subject: [Starlink] Re: AI IN SPACE: Post from Elon Musk (@elonmusk) List-Id: "Starlink has bufferbloat. Bad." Archived-At: List-Archive: List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: Michael Richardson wrote: > Which is to say, they satellite is always getting heated from one side :-) > > For non-sun synchronous LEOs, does the dark time help with radiant cooling? > I assume some satellites' cooling profile are designed around the assumption that they > will be dark for a portion of the orbit? when you are in sunlight, you can radiate in 5 directions (except the tiny slices that face the earth and moon) when you are not in sunlight, you have to operate on battery power if you are in a 90 min low orbit, you spend just over 33 min in shadow each orbit. When you are in geosynchronous orbit (24 hour orbit) you only end up in the shadow for a few months each year (late February to mid-April and late August to mid-October) and then only for about 70 min out of each 1440 min orbit so no, satellites do not rely on being in the shadow for their cooling David Lang