Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from beak.andrew.cmu.edu via trymail for +dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl@andrew.cmu.edu (->+dist+/afs/andrew.cmu.edu/usr11/tm2b/space/space.dl) (->ota+space.digests) ID ; Tue, 1 Jan 1991 05:01:45 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Tue, 1 Jan 1991 04:59:45 -0500 (EST) Subject: SPACE Digest V12 #709 SPACE Digest Volume 12 : Issue 709 Today's Topics: Re: COBE tumbling? JPL Mars Rover article Soviet Mars Rover article Payload Status for 12/14/90 (Forwarded) Re: A human being in vacuum Galileo Update - 12/17/90 Magellan Update - 12/17/90 Administrivia: Submissions to the SPACE Digest/sci.space should be mailed to space+@andrew.cmu.edu. Other mail, esp. [un]subscription notices, should be sent to space-request+@andrew.cmu.edu, or, if urgent, to tm2b+@andrew.cmu.edu ---------------------------------------------------------------------- Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 17 Dec 90 19:14:00 GMT From: idacrd!mac@princeton.edu (Robert McGwier) Organization: idacrd, princeton, nj Subject: Re: COBE tumbling? References: <8955@scicom.AlphaCDC.COM> Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu From article <8955@scicom.AlphaCDC.COM>, by wats@scicom.AlphaCDC.COM (Bruce Watson): > > I have observed Cosmic Background Explorer twice I think it ran out of attitude gas some time back. Bob -- ____________________________________________________________________________ My opinions are my own no matter | Robert W. McGwier, N4HY who I work for! ;-) | CCR, AMSAT, etc. ---------------------------------------------------------------------------- ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 18 Dec 90 02:56:32 GMT From: usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Organization: Jet Propulsion Laboratory, Pasadena, CA. Subject: JPL Mars Rover article Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu Ad Astra, December 1990 "Auto-Piloting" There's a little patch of Mars out on the Jet Propulsion Laboratory's back lot. The rugged arroyo dry river terrain near the JPL facility in Pasadena, California, is the site for a recent test of "Robby", a semi-autonomous navigation system for a planet-roving vehicle. Last September, JPL engineers put Robby through its paces. The device covered a 100-meter course in less than four and a half hours, cautiously moving about two meters at a time, then stopping to survey the next two meters. Certainly, as far as speed goes, Robby will never get a traffic ticket. What the test demonstrated, however, was that the vehicle's stereo ranging cameras perceived the terrain ahead of its wheels in three dimensions. Using artificial intelligence, the rover plotted out, without human help, a safe route acrosst the arroyo. According to Roger Bedard Jr., JPL's planetary rover project manager, the 1000 kilogram Robby is a six-wheeled, three-body articulated vehicle. It measures four meters long, one and a half meters wide and two and a half meters high. It comes complete with a commercial robot arm attached to it fron body. JPL space engineers have long-range technology development goal for a self-contained rover to travers 20 kilometers in on day. Rover are being considered for many applications. JPL's overall program is dedicated to develop both Lunar and planetary rovers for exploration, mining and construction tasks. Roving devices are expected to play key roles as precursors for the Space Exploration Initiative, specifically to provide an all-clear before humans touch down on Mars. The Soviet Union, France and Japan also have technology development programs for building autonomous planetary rovers. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 18 Dec 90 02:58:50 GMT From: usc!zaphod.mps.ohio-state.edu!swrinde!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Organization: Jet Propulsion Laboratory, Pasadena, CA. Subject: Soviet Mars Rover article Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu Ad Astra, December 1990 "Failed Soviet Mars Rovers" Soviet space engineers have revealed more than 20 years after the fact that two mini rovers were onboard the Soviet Mars 2 and Mars 3 spacecraft that reached the Red Planet in 1971. The rovers never had a chance to strut their stuff, however, as Mars 2 crashed into the planet and the Mars 3 lander appears to have been blown over by an intense dust storm just 20 seconds after touchdown. According to Alexander Kermurjian, chief designer of the Soviet Union's Industrial Transport Institute, the rovers were to scoot across the Martian surface attached to their main landers by a 15-meter tether. The devices carried tiny sensors to measure surface strength and density on Mars' soil. The robotic revelations were discussed by Kermurjian in a recent issue of The Planetary Report, a publication of The Planetary Society. The spacecraft designer is now busily working on mobility systems for future roving devices the Soviet Union hopes to dispatch to Mars in future years. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 17 Dec 90 19:35:49 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Organization: NASA Ames Research Center, Moffett Field, CA Subject: Payload Status for 12/14/90 (Forwarded) Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu Daily Status/KSC Payload Management and Operations 12-14-90 - STS-35 ASTRO-1/BBXRT (at DFRF) Support for DFRF operations continue. - STS-39 AFP-675/IBSS/STP-01 At the VPF, CIRRIS vacuum servicing and URA pump down will begin today. Also, SPAS will be transported to the VPF today. - STS-40 SLS-1 (at O&C) Power up testing will be active today. - STS-37 GRO (at PHSF) Functional testing continue. - STS-42 IML-1 (at O&C) Preps for rack and floor installation and paper closure continues. - STS-45 Atlas-1 (at O&C) Experiment and pallet staging continue. - STS-46 TSS-1 (at O&C) Partial pallet destaging continues. - STS-47 Spacelab-J (at O&C) EPDB modifications continue. - STS-67 LITE (at O&C) Hard point installations continue. ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 17 Dec 90 18:53:48 GMT From: agate!linus!linus!mwunix.mitre.org!sokay@ucbvax.Berkeley.EDU (Stephen Okay) Organization: Mitre Corporation, McLean, VA Subject: Re: A human being in vacuum References: <9693@orca.wv.tek.com>, <127226@linus.mitre.org>, <1990Dec12.205552.10405@unicorn.cc.wwu.edu> Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu n9020351@unicorn.cc.wwu.edu writes: > >I don't have a clear idea of how that would work. If the heat in your >body isn't going _into_ something (like air), then where is it going? Its being drawn off of you by the surrounding environment. You would freeze on the one side because you are asking your body to heat you to a temperature where it could fend off an environment that is several hundred degrees colder than you. Since you also radiate heat as a matter of simply being alive, there is no way you could produce enough to keep you warm. You would fry on the other from being exposed to direct unfiltered sunlight. This would most likely be from radiation than anything else. >I don't understand the "3 or 4 degree K" outside temp. How can it have >a tempature if there's nothing there? Do you just mean an imperfect vacuum >where the particles hitting you are at 3-4 deg K? >I always had the idea that something being cold was only relavent if it was >actualy touching you. What's touching you in space? Nothing, and thats the problem. Remember, heat is derived from the movement of molecules into and around each other. No molecules to move, no heat. The whole underlying principle here is basically that more energy(heat) is being drawn off you than you can replace before serious damage occurs. Space, for all intents and purposes is a vacuum. However, it is not a perfect vaccuum. You still have to account for gas clouds, solar wind, the extended, yet not visible, atmosphere of any body you happen to be near and any radiation they give off. There is also the cosmic background radiation to be dealt with. This is where the 3-4 degrees K comes from. -- Stephen Okay sokay@mitre.org Disclaimer: I get *MYSELF* into enough trouble with my opinions, why would I want to inflict them on MITRE? CDR --Continually Dumping Rubbish, ARTS is a four letter word. ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 17 Dec 90 21:00:24 GMT From: sdd.hp.com!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Organization: Jet Propulsion Laboratory, Pasadena, CA. Subject: Galileo Update - 12/17/90 Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu GALILEO STATUS REPORT December 17, 1990 The Galileo spacecraft successfully completed its Earth Encounter sequence data taking activities on Saturday, December 15. Today, the VE-12 (Venus-Earth 12) sequence went active. Later today, the spacecraft will perform a scan platform calibration activity and a SITURN to lead the sun. Tomorrow, the Trajection Correction Maneuver Sequence TCM-9A will be sent to the spacecraft; maneuver execution will be on Wednesday, December 19. The tenth occurrence of the CDS (Command Data System) CRC 2A POR (Power-On Reset) Telemetry indication was observed Saturday, December 15. The signature was identical to the previous occurrences. Reset commands to clear the telemetry indication will be sent later today; commands will be identical to those used before. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 17 Dec 90 21:04:22 GMT From: sdd.hp.com!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Organization: Jet Propulsion Laboratory, Pasadena, CA. Subject: Magellan Update - 12/17/90 Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu MAGELLAN STATUS REPORT December 17, 1990 The Magellan spacecraft is in good health and performing nominally. All STARCALS (star calibrations) and DESATS (desaturations of the reaction wheels) during the weekend were successful. The spacecraft is now executing the first of six occulted mapping sequences. This sequence will shortens the mapping pass by 6.5 minutes in order to accommodate 46 minutes of earth occultation during the playback. Although the period of earth occultation changes with each orbit, the timing for the mapping sequence is adjusted for the maximum occultation in the week. The radar sensor health continues to operate normally. Seven full resolution image swaths were processed by the SAR (Synthetic Aperture Radar) Data Processor on December 13. The rate of image production has continued to be paced by the delivery schedule of new SAR tapes. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ End of SPACE Digest V12 #709 *******************