From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,XPRIO autolearn=ham autolearn_force=no version=3.4.4 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 103376,9b46ffbb12a63d92,start X-Google-Attributes: gid103376,public X-Google-ArrivalTime: 2002-03-01 06:50:07 PST Path: archiver1.google.com!news1.google.com!newsfeed.stanford.edu!logbridge.uoregon.edu!news.maxwell.syr.edu!fr.clara.net!heighliner.fr.clara.net!oleane.net!oleane!nnrp.oleane.net!not-for-mail From: "Jean-Pierre Rosen" Newsgroups: comp.lang.ada Subject: Ada rocket launches Ada satellite Date: Fri, 1 Mar 2002 15:46:36 +0100 Organization: Adalog Message-ID: NNTP-Posting-Host: mailhost.axlog.fr X-Trace: s1.read.news.oleane.net 1014993966 23391 195.25.228.57 (1 Mar 2002 14:46:06 GMT) X-Complaints-To: abuse@oleane.net NNTP-Posting-Date: Fri, 1 Mar 2002 14:46:06 +0000 (UTC) X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 5.50.4522.1200 X-MimeOLE: Produced By Microsoft MimeOLE V5.50.4522.1200 Xref: archiver1.google.com comp.lang.ada:20644 Date: 2002-03-01T15:46:36+01:00 List-Id: Tonight, Ariane 511 (whose flight control systems are in Ada) launched the Envisat1 satellite (with lots of Ada inside), a huge environmental survey satellite. This was a real challenge: -Envisat1 is the biggest satellite ever built in Europe, and the biggest environment survey satellite ever launched: 10m long (26m deployed), for a weight of 8211Kg) -Since it is a sun-synchronous satellite, the launch window was 0 (i.e. it had to be launched a the exact second). -It was the first time an Ariane5 launched a polar satellite (i.e. towards north instead of East). -It was the first time the long cap was used -and more.... Thanks to new fuel-saving algorithms, it was possible to turn off the engine when the exact orbit was reached (with more than 3s remaining fuel - quite a lot for such a rocket). Here is the result: Requirement vs Achieved: Req: Altitude: 7152.4km +- 7.5km. Ach: 7152.4km Req: Orbital position: 70.3 degrees +- 1.9. Ach: 69.8 Req: Inclination: 98.5 degrees +-1.1. Ach: 98.5 All details available from http://www.arianespace.com/ -- --------------------------------------------------------- J-P. Rosen (rosen@adalog.fr) Visit Adalog's web site at http://www.adalog.fr