Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Path: utzoo!linus!decvax!harpo!seismo!hao!hplabs!sri-unix!REM@MIT-MC From: REM@MIT-MC@sri-unix.UUCP Newsgroups: net.space Subject: Re: sattelites Message-ID: <3180@sri-arpa.UUCP> Date: Sun, 24-Jul-83 01:45:00 EDT Article-I.D.: sri-arpa.3180 Posted: Sun Jul 24 01:45:00 1983 Date-Received: Mon, 18-Jul-83 19:44:39 EDT Lines: 10 From: Robert Elton MaasSince the link from TDRS-1 to the nearest ground station is line-of-sight 100% of the time (after all, TDRS-1 is supposed to be geoSTATIONARY), the link from the ground station to Houston is 100% of the time via various conventional means, and the link from the orbiter to TDRS-1 is line-of-sight 50% of the time, I don't see why the overall duty time is only 20% if TDRS-1 is working. Perhaps somebody else can explain the calculation for me?