Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!Brahms@USC-ECLC From: Brahms@USC-ECLC@sri-unix.UUCP Newsgroups: net.space Subject: TDRS Shuttle Coverage Message-ID: <3169@sri-arpa.UUCP> Date: Sun, 17-Jul-83 20:43:00 EDT Article-I.D.: sri-arpa.3169 Posted: Sun Jul 17 20:43:00 1983 Date-Received: Mon, 18-Jul-83 23:19:39 EDT Lines: 21 From: Bradley S. BrahmsIn a recent message it was stated that with three working TDRS satellites the shuttle would be in contact with earth 100% of the time. Yet with only TDRS-1 working the shuttle would be in contact only 20% of the time. Question: Why only 20% and not more? Something seems wrong with this statement. The only way the shuttle could be in contact with earth 100% of the time with only three satellites would be if each covered 33.33% of the orbital paths. If you include the current ground base tracking system, of course some of it would overlap TDRS-1, a number around 38% or so comes up. Would someone please explain to me this delima(sp?)? Thank You. -- Brad Brahms (Arpa: Brahms@Usc-Eclc) -------