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 ; Thu, 15 Nov 1990 02:16:44 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Thu, 15 Nov 1990 02:16:12 -0500 (EST) Subject: SPACE Digest V12 #554 SPACE Digest Volume 12 : Issue 554 Today's Topics: Re: Payload Status for 11/08/90 (Forwarded) Cassini Investigation Team (Forwarded) Re: CRAF/Cassini Update - 11/09/90 Re: Space Station Work Package #3 Re: LLNL size and Fred micrograv environment 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: 13 Nov 90 03:49:36 GMT From: mnetor!utzoo!henry@uunet.uu.net (Henry Spencer) Organization: U of Toronto Zoology Subject: Re: Payload Status for 11/08/90 (Forwarded) References: <1990Nov8.222606.3750@news.arc.nasa.gov>, <998@qusuna.queensu.CA> Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu In article <998@qusuna.queensu.CA> akerman@qucis.queensu.CA (Richard Akerman) writes: >... I see frequent mentions of "argon >servicing for the Astro-1". What exactly is the purpose of this servicing? >Does the payload need some sort of inert environment? Not quite: some of the sensors need to be kept cold, seriously cold, and this is done with liquid or solid argon (depending on details of planned procedures). -- "I don't *want* to be normal!" | Henry Spencer at U of Toronto Zoology "Not to worry." | henry@zoo.toronto.edu utzoo!henry ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 13 Nov 90 23:04:29 GMT From: sdd.hp.com!elroy.jpl.nasa.gov!mahendo!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Organization: Jet Propulsion Laboratory, Pasadena, CA. Subject: Cassini Investigation Team (Forwarded) Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu INVESTIGATIONS SELECTED FOR THE CASSINI SATURN ORBITER INVESTIGATION ACCOMMODATION PHASE PRINCIPAL INVESTIGATOR, INSTRUMENT PAYLOAD Virgil G. Kunde, Infrared Fourier Spectrometer, NASA Goddard Space Flight Center Eberhard Grun, Cosmic Dust Analyzer, Max-Planck-Institut fuer Kernphysik, Federal Republic of Germany Donald A. Gurnett, Plasma and Radio Wave System, University of Iowa David T. Young, Plasma Spectrometer, Southwest Research Institute Larry W. Esposito, Ultraviolet Spectrometer and Imager, University of Colorado Stamatios M. Krimigis, Magnetospheric Imaging Instrument, Johns Hopkins University David J. Southwood, Dual Technique Magnetometer, Imperial College, United Kingdom INTERDISCIPLINARY SCIENTISTS Tobias C. Owen, Atmospheres, University of Hawaii Jeffrey N. Cuzzi, Rings and Dust, NASA Ames Research Center Laurence A. Soderblom, Satellites and Asteriods, U.S. Geological Survey Michel Blanc, Magnetosphere and Plasma, Observatoire Midi- Pyrenees, France Tamas I. Gombosi, Magnetosphere and Plasma, University of Michigan James B. Pollack, Origin and Evolution, NASA Ames Research Center Darrell F. Strobel, Aeronomy and Solar Wind Interaction, Johns Hopkins University FACILITY INSTRUMENT TEAMS Titan Radar Mapper: Charles Elachi, NASA Jet Propulsion Laboratory, Team Leader Randolph L. Kirk, U.S. Geological Survey Chris G. Rapley, University College, United Kingdom Giovanni Picardi, Universita di Roma, Italy Charles A. Wood, University of North Dakota Steven J. Ostro, NASA Jet Propulsion Laboratory Howard A. Zebker, NASA Jet Propulsion Laboratory Imaging Science Subsystem: Carolyn C. Porco, University of Arizona, Team Leader Gerhard Neukum, Deutsche Agentur fuer Raumfahrtangelegenheiten GmbH, Federal Republic of Germany Steven W. Squyres, Cornell University Peter C. Thomas, Cornell University Alfred S. McEwen, U.S. Geological Survey Torrence V. Johnson, NASA Jet Propulsion Laboratory Joseph Veverka, Cornell University Henry C. Dones, Jr., University of Toronto, Canada Carl D. Murray, University of London, United Kingdom Joseph A. Burns, Cornell University Andre Brahic, Observatoire de Paris-Meudon, France Anthony D. Del Genio, NASA Goddard Institute for Space Studies Andrew P. Ingersoll, California Institute of Technology Robert A. West, NASA Jet Propulsion Laboratory Radio Science Subsystem: Arvydas J. Kliore, NASA Jet Propulsion Laboratory, Team Leader Andrew F. Nagy, University of Michigan F. Michael Flasar, NASA Goddard Space Flight Center Richard G. French, Wellesley College Essam A. Marouf, Stanford University John D. Anderson, NASA Jet Propulsion Laboratory Nicole Borderies, Observatoire Midi-Pyrenees, France Hugo D. Wahlquist, NASA Jet Propulsion Laboratory Bruno Bertotti, Universita di Pavia, Italy Luciano Iess, Istituto di Fisica dello Spazio Interplanetario, Italy Ion and Neutral Mass Spectrometer: A Facility Instrument Definition Team is to be appointed. A Science Team will be solicited through a separate announcement of opportunity. Visual and Infrared Mapping Spectrometer: Facility Instrument approved for Investigation Accommodation Phase; to be included in payload only if resources permit. Robert H. Brown, NASA Jet Propulsion Laboratory, Team Leader Dale P. Cruikshank, NASA Ames Research Center Roger N. Clark, U.S. Geological Survey Andrea Carusi, Istituto di Astrofisica Spaziale, Italy Angioletta Coradini, Istituto di Astrofisica Spaziale, Italy Jean-Pierre Bibring, Universite de Paris Sud-Orsay, France Christophe Sotin, Universite de Paris Sud-Orsay, France Yves Langevin, Universite de Paris Sud-Orsay, France Robert M. Nelson, NASA Jet Propulsion Laboratory Ralf Jaumann, Deutsche Agentur fuer Raumfahrtangelegenheiten GmbH, Federal Republic of Germany Dennis L. Matson, NASA Jet Propulsion Laboratory Kevin H. Baines, NASA Jet Propulsion Laboratory Vittorio Formisano, Istituto Fisica Plasma Interplanetario, Italy Michael Combes, Observatoire de Paris-Meudon France Pierre Drossart, Observatoire de Paris-Meudon, France Bruno Sicardy, Observatoire de Paris-Meudon, France ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | 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: 13 Nov 90 10:43:19 GMT From: eru!hagbard!sunic!mcsun!corton!irisa!irisa.fr!hthomas@bloom-beacon.mit.edu (Henry Thomas) Organization: IRISA/INRIA Rennes Subject: Re: CRAF/Cassini Update - 11/09/90 References: <1990Nov11.001924.10302@jato.jpl.nasa.gov>, <7034.273fd310@abo.fi> Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu In article <7034.273fd310@abo.fi>, mlindroos@abo.fi writes: |> In article <1990Nov11.001924.10302@jato.jpl.nasa.gov>, baalke@mars.jpl.nasa.gov (Ron Baalke) writes: |> > |> > CRAF/Cassini Status Report |> > November 9, 1990 |> > ...take the Huygens probe about 3 hours to parachute all the way down to the |> > surface of Titan; if the probe survives the landing, valuable data will |> > continue to be transmitted back for about 30 more minutes. No more data will |> > be returned to the Cassini orbiter from Huygens on any subsequent orbits, as |> > the battery onboard Huygens will have rundown by then. |> > |> |> 30 minutes! Why can't we send an advanced long-life, Viking-style probe |> to Titan instead?! The Viking lander was "only" about twice as heavy as the |> Huygens probe will be so the lack of a powerful-enough launcher surely cannot |> be the reason? Is this just because of financial considerations again, or...? The reason is maybe that we have NO data of the condition down there: - Is there any *solid* ground ? - pressure ? - temperature ? So with no information, it seems difficult to design a long-life probe. A similar(?) problem occured on Venus, where the probes Venera 11-14 lasted only a few hours. The first ones didn't reached the ground because theirs parachutes where destroyed by the acid atmosphere. On mars, the informations where much more complete, because the ground had been observed by many orbital probes: it was visible. There was an excellent article in the ESA journal (?), some month ago about "Cassini Probe Huygens Entry techniques" . -- -- E-mail: Henry.Thomas@irisa.fr Henry Thomas - IRISA Campus Universitaire de Beaulieu 35042 RENNES CEDEX FRANCE Phone: (+33)99 36 20 00 +549 Fax: (+33)99 38 38 32 Telex: UNIRISA 950 473F X.400: C=FR;ADMD=ATLAS;PRMD=irisa;S=hthomas Telex:/X121=842950473/@atlas.fr ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: 13 Nov 90 17:28:15 GMT From: julius.cs.uiuc.edu!rpi!zaphod.mps.ohio-state.edu!samsung!cs.utexas.edu!news-server.csri.toronto.edu!utgpu!utzoo!henry@apple.com (Henry Spencer) Organization: U of Toronto Zoology Subject: Re: Space Station Work Package #3 References: <90311.130321GWS102@psuvm.psu.edu>, <9011072137.AA15699@iti.org>, <2676@polari.UUCP> Sender: space-request@andrew.cmu.edu To: space@andrew.cmu.edu In article <2676@polari.UUCP> crad@polari.UUCP (Charles Radley) writes: >Freedom includes microgravity and life science capability, without >the additional expense of these free-flyers... And without their additional capabilities. >The LLNL/Free-flyer >system combination is not useful for life sciences... How so? What does Fred have in intrinsic capabilities -- as opposed to problems that can be fixed by just shipping up the right equipment -- that LLNL doesn't? Note that LLNL has variable gravity, which Fred lacks and which is of some substantial importance. >Freedom also >has some polar orbit free-flyers for Earth Observation activites, Not any more it doesn't. They have been split off as independent projects, which is what they really were all along. They had absolutely nothing to do with the space station. -- "I don't *want* to be normal!" | Henry Spencer at U of Toronto Zoology "Not to worry." | henry@zoo.toronto.edu utzoo!henry ------------------------------ Return-path: X-Andrew-Authenticated-as: 0;andrew.cmu.edu;Network-Mail Date: Tue, 13 Nov 90 14:55:19 -0500 From: "Allen W. Sherzer" To: space+@andrew.cmu.edu Subject: Re: LLNL size and Fred micrograv environment Newsgroups: sci.space In-Reply-To: <2721@polari.UUCP> References: <9011072124.AA13810@iti.org> <2688@polari.UUCP> <8700@fmeed1.UUCP> Organization: Evil Geniuses for a Better Tomorrow Cc: In article <2721@polari.UUCP>: >+This is not a benefit, it is a liability. Ask the micrograv >+researchers. A free-flyer can be tailored to the job, and >+does not suffer from vibration or CG shifts on the station proper. >In an ideal sense this is true. In practice, experiments fail all >the time, and benefit from human intervention to get them going >again. But then the things you do to fix the failed experiment may well break several others. This is why microgravity people would rather have a free-flyer. >It is rather the reverse, the experiments will have to be scheduled >around when the burns are required, which will be once or twice per >orbit. Not a serious problem. >+On a manned platform, you are going to have vibration any time the >+crew is moving around, which will be much of the time. There is work >+which cannot be done on a manned platform, and the Fred design >+doesn't allow for it at all. >Indeed. It is a trade off. NASA considers human presence to be >of benefit, on balance. This is true. The problem is that the benefit goes to NASA and not to the people doing microgravity work. Many material scientists, concerned over vibrations in the station that would be caused by nearby astronauts, continue to urge NASA to consider removing their projects to orbiting laboratories that would only be visited by astronauts. -- Avation Week Nov. 12, 1990 page 27 Allen -- +---------------------------------------------------------------------------+ |Allen W. Sherzer| I had a guaranteed military sale with ED-209. Renovation | | aws@iti.org | programs, spare parts for 25 years. Who cares if it | | | works or not? - Dick Jones, VP OCP Security Concepts | ------------------------------ End of SPACE Digest V12 #554 *******************