From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=-0.5 required=5.0 tests=DKIM_ADSP_CUSTOM_MED, DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham autolearn_force=no version=3.4.2 Received: from minnie.tuhs.org (minnie.tuhs.org [45.79.103.53]) by inbox.vuxu.org (OpenSMTPD) with ESMTP id 07bed5ff for ; Wed, 28 Nov 2018 17:09:07 +0000 (UTC) Received: by minnie.tuhs.org (Postfix, from userid 112) id DDFEAA1CF9; Thu, 29 Nov 2018 03:09:06 +1000 (AEST) Received: from minnie.tuhs.org (localhost [127.0.0.1]) by minnie.tuhs.org (Postfix) with ESMTP id 9F81CA1CE2; Thu, 29 Nov 2018 03:08:32 +1000 (AEST) Received: by minnie.tuhs.org (Postfix, from userid 112) id C67CCA1CE2; Thu, 29 Nov 2018 03:08:25 +1000 (AEST) Received: from mail-lj1-f177.google.com (mail-lj1-f177.google.com [209.85.208.177]) by minnie.tuhs.org (Postfix) with ESMTPS id 28F74A1CE1 for ; Thu, 29 Nov 2018 03:08:20 +1000 (AEST) Received: by mail-lj1-f177.google.com with SMTP id k19-v6so24101052lji.11 for ; Wed, 28 Nov 2018 09:08:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:in-reply-to:references:from:date:message-id:subject:to :cc; bh=bbFCMGQ43hSROXCWvMVs/pa7gOv2KP3Mt6Rxm8Aq8oE=; b=XEB1G4a9naCT0eonxGMrGqFioT9egPgxhnaVIJs681mZyRuorU3XAUdFJ1PE8rXh8q 3t5V4krho5p1X9E/2PNt6iOUrlPLl4f/7UuJjDD/hpA57qN8jg+mSr/sbLjg3ySeI00+ 5InS+xZLwmnjz8T8cqgIVrfMZHzw+fs/3RxSJ+90ATIYML7LcGU7YlWk/DFhH+JJmXfb YCc7GVIyU+K7b4Vgo4wY4fNgroM0Qf5wycPHinh45UyBvi/nkEfNslyxQHlKSsie4rNb o1bJHzhGL/bJ+cL5k6wWJINDr3vG1uwl77ihaJ7k8cMO+lClNHxY0bjzTs0ynOOntkSq 3/Tw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:in-reply-to:references:from:date :message-id:subject:to:cc; bh=bbFCMGQ43hSROXCWvMVs/pa7gOv2KP3Mt6Rxm8Aq8oE=; b=Ov6TnYY5BvQ07QBL8CM04mGl+rCmeJ4qlquGT3XxenfgkY71Q4953vYNFqgcNzFYRX URpRnhdeSrtYyXuzaBq0wZlK890o9/avA9MScAapPbDOcrkIDTvNt/s4SwQua6mVdBbg RXRT8p7LljOaGvMcuHMUN8s8W8j382DL00v2xopMquH9PDRH9MlhKnE4ehk5kjYdcn3O AusFqMWvrHhPQdL2cd0rXL235ifMdjacCWA6CRBaQQxnqtgtmIPfIIPYwkV4IcfQApsW BVztuar2/vPDaOcF7czmOZDHiZVgI3KFBArFJ25dUASxVi2EtqiZNLN3UvbxWYBUZg9d A8HQ== X-Gm-Message-State: AA+aEWaFglJgmIeduzR8l0dDLoiEG960PtTmTJyscAgnHcN3yTH75Ud3 4iwFfmQF9PXERBUhu9rw6Bt3mHv/MYXqa+BRrO4= X-Google-Smtp-Source: AFSGD/XNXX5BTjsuHyjO3crCeCgPuWSB+3RkryhRzvQLYG2kBKNwlqQfI83yVvDblsgZE3DOrlNUZczgmZ1yjyj1whA= X-Received: by 2002:a2e:994:: with SMTP id 142-v6mr21065862ljj.120.1543424898363; Wed, 28 Nov 2018 09:08:18 -0800 (PST) MIME-Version: 1.0 Received: by 2002:a2e:3a11:0:0:0:0:0 with HTTP; Wed, 28 Nov 2018 09:08:17 -0800 (PST) In-Reply-To: References: <20181128025739.GA5701@mcvoy.com> From: Paul Winalski Date: Wed, 28 Nov 2018 12:08:17 -0500 Message-ID: To: Ken Thompson Content-Type: text/plain; charset="UTF-8" Subject: Re: [TUHS] In Memoriam: J.F.Ossanna X-BeenThere: tuhs@minnie.tuhs.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: The Unix Heritage Society mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: The Eunuchs Hysterical Society Errors-To: tuhs-bounces@minnie.tuhs.org Sender: "TUHS" On 11/27/18, Ken Thompson via TUHS wrote: > another joe: > > echo 1 was a 100 foot balloon that was > launched into space in the early 60s. this > was the first satellite that was easily visible > to the naked eye. > > joe wrote a set of fortran programs that > tracked the orbit of echo and calculated > the direction to look from a point on earth. > to do this, he had to learn fortran and > orbital dynamics. > > by the time i came to bell labs (1966) the > program, azel, for azimuth/elevation, was > expanded to track planets, moons, satellites, > etc. moreover, it tracked the shadow of the > earth cast by the sun (night). it could predict > within a few seconds when echo would wink > on or off as it passed through the shadow. > > a version of azel was maintained all the time > i was at bell labs. we used it to predict > eclipses, transits, occultations etc. when > we first got a voice synthesizer, the day's > predictions were spoken at 5pm in case > there was anything interesting. > What a great story. There is today a website (heavens-above.com) that does the same thing as Joe's azel. Amateur Astronomers visit it regularly to get the night's predictions for visible satellite transits, visible passes of the International Space Station, etc. I had no idea the idea went back that far. -Paul W.