Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from corsica.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr1/ota/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr1/ota/space/space.dl) (->ota+space.digests) ID ; Thu, 22 Jun 89 03:16:25 -0400 (EDT) Message-ID: Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Thu, 22 Jun 89 03:16:17 -0400 (EDT) Subject: SPACE Digest V9 #502 SPACE Digest Volume 9 : Issue 502 Today's Topics: Re: Space Station Computer System Re: Orbital queries Books about Space ---------------------------------------------------------------------- Date: 14 Jun 89 14:11:42 GMT From: datapg!com50!questar!dave@uunet.uu.net (David Becker) Subject: Re: Space Station Computer System In article <3251@mhres.mh.nl> hst@mh_co2.mh.nl (Klaas Hemstra) writes: > Space station ? > What space station ? > Mir ? > I believe there are Russian computers in there :-) Could someone describe the computers and data network on Mir? -- David Becker and another bug bites, and another bug bites another bug bites the dust db@kolonel.MN.ORG ------------------------------ Date: 15 Jun 89 23:47:17 GMT From: ux1.cso.uiuc.edu!jep@uxc.cso.uiuc.edu Subject: Re: Orbital queries Regarding #2: A rocket sitting on the launch pad has a west-to-east velocity due to the daily rotation of the earth. At the equator this is about 464 m/s (approx. 1038 mph). At a latitude L it is 464 cos L m/s. To launch into an east-to-west "retrograde" orbit, one would have to expend fuel to cancel this velocity component, rather than use it as a *freebie* in an easterly launch. Satellites in geosynchronous orbit also travel *west-to-east*, i.e. posigrade; it's just that the earth rotates at exactly the same west-to-east angular velocity as the satellite, so it appears motionless over a point on the surface of the earth at the equator. For polar orbits, the easterly velocity of the launch pad must be cancelled out exactly and a northerly (or southerly) velocity added. This is relatively expensive in terms of fuel (smaller payloads to orbit) and is accomplished by launching toward the north-west; that's why our polar orbit satellites are launched from Vandenberg AFB in California out over the Pacific Ocean.........wouldn't want to launch north-west from Cape Canaveral.......TOO DANGEROUS! ------------------------------ Date: 15 Jun 89 11:25:28 GMT From: mcvax!unido!tub!tubopal!opal!olaf@uunet.uu.net (Olaf Heimburger) Subject: Books about Space A friend of mine is looking for some books, papers, or informations about the followings topics: - Space projects on Earth - Future of Space Research - Computer Aided Astronomy Please e-mail me your comments, suggestions, etc. Regards, --olaf -- * Olaf Heimburger, The ISOTEXT Project, TU Berlin (West), Dep. of CS * uucp: ...!pyramid!tub!olaf (US) ...!mcvax!unido!tub!olaf (Europe) * * >>> Have you hugged your Computer today? ------------------------------ End of SPACE Digest V9 #502 *******************