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 ; Fri, 19 Oct 1990 01:51:21 -0400 (EDT) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Fri, 19 Oct 1990 01:50:25 -0400 (EDT) Subject: SPACE Digest V12 #464 SPACE Digest Volume 12 : Issue 464 Today's Topics: Re: Hubble Galileo Update - 10/17/90 Re: Cost comparison: Apollo/Saturn vs. Shuttle NORAD Software in C Re: Pioneer 11 and Pluto? Re: Challenges to nomenclature Cassini mission? Need a contact for ROCKWELL Deutsche T-shirts Re: Man-rated SRBs (was Re: Junk the shuttle?) Titan Probe Payload Selected knowledge/educational background for NASA/space employment Pioneer 11 and Pluto? Re: Venus/Magellan, poles 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 ---------------------------------------------------------------------- Date: 17 Oct 90 15:58:26 GMT From: mojo!yun@mimsy.umd.edu (Dragon Taunter) Subject: Re: Hubble Bill.Green@samba.acs.unc.edu (Bill Green) writes: >So, what's the status of the Hubble telescope? I haven't seen anything >posted recently and haven't heard much about it on the news. Anyone >have a current update? Nothing complete or technical but I just read this morning that the HST will monitor Saturn's storms (apparently there are two smaller storms near the GWS) possibly starting in early November. Don't know when geewiz pictures will be available, probably after the next PR committee meeting. -- yun@wam.umd.edu zwy0c@scfvm.gsfc.nasa.gov (code 926) yun@eng.umd.edu zwy0c@charney.gsfc.nasa.gov 5 hrs 10' 39" W 39 deg 2' 9.7" N A milihelen is the amount of beauty required to launch one ship. ------------------------------ Date: 17 Oct 90 18:25:29 GMT From: usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Subject: Galileo Update - 10/17/90 Galileo Mission Status October 17, 1990 The Galileo spacecraft's performance continues to be excellent. Today, the spacecraft's 1200 bps high rate engineering telemetry data was successfully received and processed using both 70 meter antennas in Goldstone and Australia. This is the first time since the Venus flyby on February 9 that link performance permitted 1200 bps telemetry data to be transmitted and processed. Yesterday, several commands were sent to configure the spacecraft's telecommunications hardware in support of the planned delta DOR (Differential One-way Ranging) navigation activity. The delta DOR was successfully completed today. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 16 Oct 90 21:30:23 GMT From: timbuk!sequoia!gbt@uunet.uu.net (Greg Titus) Subject: Re: Cost comparison: Apollo/Saturn vs. Shuttle In article dlbres10@pc.usl.edu (Fraering Philip) writes: >"A billion here, a billion there, and pretty soon you're talking >about real money." William Proxmire ^^^^^^^^^^^^^^^^ Everett Dirksen? greg -- -------------------------------------------------------------- Greg Titus (gbt@zia.cray.com) Compiler Group (Ada) Cray Research, Inc. Santa Fe, NM Opinions expressed herein (such as they are) are purely my own. ------------------------------ Date: 16 Oct 90 04:01:46 GMT From: munnari.oz.au!metro!nuts!cc.nu.oz.au!eeljs@THEORY.TN.CORNELL.EDU Subject: NORAD Software in C NORAD Listing in C I am looking for a C version of the NORAD satellite tracking software. I have a version in Fortran but would appreciate it if someone could supply a version in C. The Fortran version is very unmanageable. Thanks Len eeljs@cc.nu.oz.au ----------------- ------------------------------ Date: 17 Oct 90 03:44:46 GMT From: julius.cs.uiuc.edu!zaphod.mps.ohio-state.edu!van-bc!ubc-cs!news-server.csri.toronto.edu!utgpu!utzoo!henry@apple.com (Henry Spencer) Subject: Re: Pioneer 11 and Pluto? In article <6969.271b029d@abo.fi> mlindroos@abo.fi writes: >Talking about Pioneer 11 and a mission to Pluto, how come nobody at JPL >considered sending that spacecraft onwards to Pluto after the Saturn encounter >in 1979?! ... Well, for one thing, the Pioneers are not JPL spacecraft! Ames does them. More seriously, I don't know for sure, but I'd guess the same reason why Voyager 1 did not go for Pluto: science objectives at Saturn had higher priority. Planetary encounter trajectories are always compromises, and a gravity-assist trajectory is rarely what either the fields-and-particle people or the imaging people want. Even the Voyagers were primarily Jupiter/Saturn missions, with Voyager 2 committed to Uranus and Neptune only after Voyager 1's Saturn encounter was successfully completed and Voyager 2 could be released from its role as Voyager 1 backup. -- "...the i860 is a wonderful source | Henry Spencer at U of Toronto Zoology of thesis topics." --Preston Briggs | henry@zoo.toronto.edu utzoo!henry ------------------------------ Date: 17 Oct 90 17:16:37 GMT From: swrinde!zaphod.mps.ohio-state.edu!samsung!umich!umeecs!msi.umn.edu!cs.umn.edu!kksys!orbit!pnet51!schaper@ucsd.edu (S Schaper) Subject: Re: Challenges to nomenclature I tend to agree. If Americans find it first, it ought to get a culterally American name - Mariner Valley, Dry Gultch, whatever, Rusian - Mare Moscoviense... In Old Slavonic, of course. History for the historians. You can still learn something in Europe a bout the tribal migrations by looking at the derivations of the place names. This choosing of classical names seems to be an overhumble attitude like our landing on the moon `for all mankind' when the Soviets would have undoubtedly claimed it for the Proletariat. Carried to an extreme. UUCP: {amdahl!bungia, uunet!rosevax, chinet, killer}!orbit!pnet51!schaper The necktie is a device of Mordor ARPA: crash!orbit!pnet51!schaper@nosc.mil INET: schaper@pnet51.cts.com ------------------------------ Date: 18 Oct 90 13:17:35 GMT From: eru!hagbard!sunic!news.funet.fi!ra!abo.fi!mlindroos@bloom-beacon.mit.edu Subject: Cassini mission? I've heard very little of the proposed Cassini/Huygens mission to Saturn. All I know is that it's supposed to leave Earth in 1996 and will reach its destination in about 2002 and drop a probe (Huygens) on Titan. Will Cassini map Titan by radar, for example? Is the Huygens-lander to be equipped with a camera? Hopefully somebody (JPL) can send a brief mission description! ------------------------------ Date: 17 Oct 90 14:47:44 GMT From: mcsun!ukc!harrier.ukc.ac.uk!has@uunet.uu.net (H.A.Shaw) Subject: Need a contact for ROCKWELL The subject line says it all really. I have to design some electronics for the proposed MARS-94 Soviet mission and am looking for info on ADCs, DACs, CMOS logic and 8-bit processors that are MIL or space rated. My addresses for ROCKWELL Semiconductor Division are from 1984, and they have moved. I need a current U.K. address and contact. If anyone could help it would help me considerably. Thanks very much. Please either Email me, or phone at the address below. I have already contacted Plessey, National Semiconductors, Marconi, Analog Devices and P.M.I. I will also need info on how this sort of thing has been done in the past. Looking at the Magellen reports I have some ideas of how you design the redundancy etc. of a space probe control system but I really need some good books. The bit I have to do is not very much, but I want to get it right if I can. Any general pointers? One great advantage of flying on a Soviet probe seems to have is that a little bod like me actually gets to do something real! HOWiE. Email: has@ukc.ac.uk | Howard Allan Shaw. | The Unit for Space Science. Phone: +44 227 764000 Extn: 3785 | Room 165, Physics Laboratory, | The University, | Canterbury, England. CT2 7NJ ------------------------------ Date: 17 Oct 90 10:32:54 GMT From: eru!hagbard!sunic!lth.se!newsuser@bloom-beacon.mit.edu (Magnus Bodin) Subject: Deutsche T-shirts BITTE. Ich suche T-shirts vom folgende Deutsche universit{ten: * Rostock * Wittenberg * Augsburg * Basel (Yes, in Switzerland) * Regensburg * Leipzig weil ich sehr intressiert f/"ur Tycho Brahe (Astronom aus Schonen) bin. Er hast bei allem studiert. Ich will selbstverst/"antlich f/"ur den T-shirt zahlen, in DM. (Entschuldige mein Deutsche..) (changing to English) Is there anyone who'll help me finding University-T-Shirts from the above listed universities? Are there all still there? Would be very grateful, and will of course return with som Swedish gift. PLEASE email or write to the adress below. Danke vielmals befor. Magnus -- Magnus Bodin "Nec fasces, nec opes, Institute of Tychology, sola artis sceptra perennant" Box 5127, 220 05 Sweden (Tycho Brahe, Stj{rneborg 1584) ------------------------------ Date: 15 Oct 90 22:52:43 GMT From: ubc-cs!news-server.csri.toronto.edu!utgpu!utzoo!henry@beaver.cs.washington.edu (Henry Spencer) Subject: Re: Man-rated SRBs (was Re: Junk the shuttle?) In article <1411@ke4zv.UUCP> gary@ke4zv.UUCP (Gary Coffman) writes: >>Just about the only things *right* about them are that they have high >>thrust for their size, and they are a bit cheaper to develop than >>liquids. Guess what the clincher was for the shuttle? > >There are also a lot less things to go wrong in solids. There are no >turbo pumps, no complex valves and plumbing, no cryogenic liquids to >handle, no complex electronic control system to fail, just light and >go. Admittedly the shuttle's SRBs are poorly designed, but in general, >solids are the most reliable rockets we know how to build. Well, yes and no. The simplicity of solids is, in my opinion, somewhat illusory. Yes, they have few parts in principle... but their good behavior is very dependent on the precise small-scale physical shape of large masses of propellant, something which is really quite difficult to guarantee. As witness the spectacular and enormously expensive fireworks display at Vandenberg the last time a Titan SRB had a flaw in its case bonding. The behavior of that propellant mass is anything but simple, and it is crucial. Liquid rockets you can at least test. SRBs have to work the first time. And if you want SRBs with thrust vectoring -- which becomes very hard to avoid when they get to be a major component of your thrust -- then the turbomachinery and plumbing and control systems come back. One should beware of extrapolating the good results with small strap-on boosters to systems involving primary thrust from solids. -- "...the i860 is a wonderful source | Henry Spencer at U of Toronto Zoology of thesis topics." --Preston Briggs | henry@zoo.toronto.edu utzoo!henry ------------------------------ Date: 18 Oct 90 16:53:50 GMT From: usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Subject: Titan Probe Payload Selected The Science Programme Commitee meeting help on September 17-18, 1990 at the Eurpean Space Agency headquarters in Paris, approved the selection of the following payload for the Titan probe, Huygens, of the Cassini mission to Saturn: o ASI (Atmospheric Structure Instrument) - measures the temperature and pressure of the atmosphere, winds and turbulance, and the atmosphere electricity. o GCMS (Gas Chromatograph) - measures the composition of the atmosphere during descent. o ACP (Aerosol Collector and Pyrolyser) - samples aerosols suspended in the atmosphere, and analyzes their composition. o DISR (Descent Imager/Spectral) - makes spectral measurements in several wavelengths from the ultraviolet to the near infrared and will take pictures of the clouds and of the ground. o SSP (Surface Science Package) - provides fundamental information on the state (liquid, semi-liquid, solid) of Titan's surface at the point of touchdown. o DWE (Doppler Wind Experiment) - measures zonal wind characteristics with very high accuracy. The Science Programme Committee also recommends that NASA and ESA do their best to accomodate two other instruments on the Huygens probe: o Nephelometer - measures aerosol size and distribution, possibly use a refurbished Galileo nephelometer o Altimeter - measures the distance between the probe and the ground during descent; also provides information on surface roughness. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 17 Oct 90 15:55:53 GMT From: news@ncsuvx.ncsu.edu (Bill Seward) Subject: knowledge/educational background for NASA/space employment A question that has interested me for some time... What fields would a computer professional need to be knowledgable in to have a good chance of securing employment with a space agency? (Other than, of course, things like programming, analysis, etc.) Please reply directly; if there is sufficient information I will summarize and post. Bill Seward, Analyst, Programmer, System Manager, User Training, and whatever else needs doing SEWARD@NCSUVAX.BITNET SEWARD@CCVAX1.CC.NCSU.EDU ------------------------------ Date: 16 Oct 90 12:52:44 GMT From: eru!hagbard!sunic!news.funet.fi!ra!abo.fi!mlindroos@bloom-beacon.mit.edu Subject: Pioneer 11 and Pluto? Talking about Pioneer 11 and a mission to Pluto, how come nobody at JPL considered sending that spacecraft onwards to Pluto after the Saturn encounter in 1979?! Or would the probe's rather limitedd/primitive payloa (take the imaging system, for example) have prevented it from carrying out any useful research out there? MARCU$ LINDROO$, AABO AKADEMI UNIVERSITY, FINLAND ------------------------------ Date: 17 Oct 90 17:03:50 GMT From: julius.cs.uiuc.edu!wuarchive!sdd.hp.com!elroy.jpl.nasa.gov!jato!mars!baalke@apple.com (Ron Baalke) Subject: Re: Venus/Magellan, poles In article <901017.113902.EDT.JEFF@UTCVM> JEFF@UTCVM.BITNET (Jeffrey R Kell) writes: >I read all the (various) definitions of "poles" and longitude direction, >spin, etc., but to ask a possibly silly question, HOW do you determine >where a longitude grid BEGINS? Find Greenwich, Venus? ( ;-) ) > Ariadna Crater is used as the prime meridian on Venus. It is a small impact crater about 17 miles across, located in Sedna Planitia. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | 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 #464 *******************