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, 5 Apr 90 01:56:23 -0400 (EDT) Message-ID: Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Thu, 5 Apr 90 01:55:56 -0400 (EDT) Subject: SPACE Digest V11 #221 SPACE Digest Volume 11 : Issue 221 Today's Topics: Public viewing of HST images Re: Public viewing of HST images Re: Will we lose another orbiter? Re: What does it cost to push a pound into orbit? Re: Velikovsky's Theory Re: Ejection seats Re: Discovery's spin Pegasus scrub Galileo Update - 04/04/90 Re: NASA Headline News for 03/29/90 (Forwarded) Re: Seeing the Jupiter picture (Was Re: HST Image Status) Re: Quick launches ( was: Intelsat / Titan Failure ) Seeing the Jupiter picture (Was Re: HST Image Status) ---------------------------------------------------------------------- Date: 4 Apr 90 15:28:20 GMT From: hadron!inco!fontana@decuac.dec.com (Tod Fontana) Subject: Public viewing of HST images Has any schedule or agenda been released indicating what images will be released to the public, when and where we can see it? I heard there was some argument over pointing it first at more scientifically (sic?) important but probably more "boring" areas and pointing it at something more flashy like a planet or nebula. And by the way, is the tv show Nova working on a show about the Neptune flyby? I enjoyed their presentations of the other planets, but have not seen anything on Neptune yet. They should have a good show after HST goes up to. I seem to have trouble getting response postings to my queries to the net, so email me any info you may have. Thanx! ------------------------------ Date: 5 Apr 90 01:59:56 GMT From: agate!headcrash.Berkeley.EDU!gwh@ucbvax.Berkeley.EDU (George William Herbert) Subject: Re: Public viewing of HST images In article <7943@inco.UUCP> fontana@inco.UUCP (Tod Fontana) writes: >Has any schedule or agenda been released indicating what images will be >released to the public, when and where we can see it? I heard there was >some argument over pointing it first at more scientifically (sic?) >important but probably more "boring" areas and pointing it at something >more flashy like a planet or nebula. Monday afternoon I was fortunate to attend a press information session here at UCB, where three newspaper journalists talked to three UC professors who are getting Hubble time in the first year. One of the points that was very clearly brought up was priority. Prof. Ivan King explained that the images that are from individual researchers or group's time on the HST will be exclusive property for eighteen months. While some random images will be available for the press, the vast majority of the images are reserved for the particular investigators with HST time, until they have a chance to analyze them and publish. ******************************************************************************* George William Herbert JOAT For Hire: Anything, Anywhere: My Price UCB Naval Architecture undergrad: Engineering with a Bouyant Attitude :-) ------------------------------------------------------------------------------- gwh@ocf.berkeley.edu <= prefered [also gwh@soda.berk.. and maniac@garnet.berk..] Give me a billion dollars and two years and I'll build you a space station you'll never forget. "Pull up! NO, NOT THAT UP!" CRUNCH ------------------------------ Date: 4 Apr 90 17:51:18 GMT From: rochester!dietz@PT.CS.CMU.EDU (Paul Dietz) Subject: Re: Will we lose another orbiter? In article <9004032052.AA15657@gemini.arc.nasa.gov> greer%utd201.dnet%utadnx@utspan.span.nasa.gov writes: >>This is false. The alternative was waiting until April ("My god, >>Thiokol,..."), when the weather would be warm enough to not be out of >>the range of previous experience. If they had held, they would have >>had to have held for months, not days. More broadly, NASA had been >>...(Paul) > > Maybe if you launch from Cape Cod you'd have to wait till April, but >at Cape Canaveral, you don't generally get winter more than a few days at >a time. > Just nitpicking. Dale, The Thiokol engineers, the night before the accident, had said they would not recommend a launch at a (joint?) temperature below 53 F. This was the calculated joint temperature for 51-C, a launch on 1/24/85 that suffered severe blow-by of a primary O-ring (the air temperature at launch time was 66 F, by the way). Upon hearing this, Mulloy retorted "My God, Thiokol, when do you want me to launch -- next April?" In retrospect, even 53 F was probably too low. All four shuttle flights before 51-L with O ring temperatures below 63 F showed O ring thermal distress, vs 3 out of 20 at temperatures above 66 F. Paul F. Dietz dietz@cs.rochester.edu ------------------------------ Date: 4 Apr 90 11:13:46 GMT From: dasys1!tbetz@nyu.edu (Tom Betz) Subject: Re: What does it cost to push a pound into orbit? Quoth henry@utzoo.uucp (Henry Spencer) in <1990Mar27.181701.4600@utzoo.uucp>: |In article <1990Mar26.201456.17161@eagle.lerc.nasa.gov> dbm0000@DOMAIN_2.lerc.nasa.gov (Dave McKissock) writes: |>>Shuttle $300 mil 50,000 (LEO) $6,000 [1] |> |>Here at NASA Lewis Research Center, when we perform Life Cycle Cost |>calculations for Space Station we use $3000 / lb for Shuttle |>launch costs. | |Asking the price of a shuttle launch is like asking the price of an F-15. I appreciate your responses wrt LEO launches. However, nobody said anything about the other targets: Geostationary L[1-5] Lunar Landing Solar "Landing" (into the Sun) Other interesting targets... Can anyone point me at useful references for such information? Thanks. -- "I don't run - I tend to black my eyes." - D.Parton | hombre!marob!upaya!tbetz ----------------------------------------------------| tbetz@dasys1.UUCP "The conventional view serves to protect us | Tom Betz - GBS from the painful job of thinking." - J.K. Galbraith | (914) 375-1510 ------------------------------ Date: 4 Apr 90 05:20:15 GMT From: cs.utexas.edu!news-server.csri.toronto.edu!qucdn!gilla@tut.cis.ohio-state.edu (Arnold G. Gill) Subject: Re: Velikovsky's Theory In article <1990Apr2.154921.2165@utzoo.uucp>, henry@utzoo.uucp (Henry Spencer) says: > >In article <1656@cybaswan.UUCP> iiitsh@cybaswan.UUCP (Steve Hosgood) writes: >>Has Velikovsky's theory held up under attack from supercomputer simulations >>in recent years? ... > >Nobody with any real understanding of physics takes Velikovsky seriously. >Attacking his theories with supercomputer simulations would be like attacking >a gnat with a sledgehammer. Attacking them with a physics textbook suffices. Maybe, but people are doing the supercomputer simulations anyway, for their own research. People like Scott Tremaine at CITA (UToronto), Martin Duncan and Brett Gladman at Queen's. They all show that the planets have been in their current orbits for millions of years, and that if they had strayed from their circular orbits, they would have been ejected from the Solar System by encounters with Jupiter. If you are talking about the origin of comets, Brett's thesis (currently writing) shows that they cannot originate anywhere inside the orbit of Neptune, but that there seems to be quasi-stable orbits at around 40 AU (this is being currently checked). It seems that current work discounts the Oort Cloud hypothesis, but is looking at something called the Kuiper Belt hypothesis instead. Hopefully these people's super computer results will tie down a bit better just where this Belt could reasonably exist. ------- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- | Arnold Gill | | | Queen's University at Kingston | If I hadn't wanted it heard, | | BITNET : gilla@qucdn | I wouldn't have said it. | | X-400 : Arnold.Gill@QueensU.CA | | | INTERNET : gilla@qucdn.queensu.ca | | -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- ------------------------------ Date: 4 Apr 90 16:00:46 GMT From: cs.utexas.edu!news-server.csri.toronto.edu!utgpu!utzoo!henry@tut.cis.ohio-state.edu (Henry Spencer) Subject: Re: Ejection seats In article <384@mtndew.UUCP> friedl@mtndew.UUCP (Steve Friedl) writes: >> Your 25g estimate is in the ballpark. Older seats generated up to 40g >> and had consequent higher injury rates. > >So what causes these injuries? Hitting the ground? Hitting the >canopy? Getting arms caught on something? Sheer acceleration? Sheer acceleration. Ejection is a very violent process, near the limit of human tolerance, useful only when the alternative is worse. Getting arms caught, hitting debris, etc. are additional hazards which sometimes cause injury, but even without them, ejection is hazardous to your health. -- Apollo @ 8yrs: one small step.| Henry Spencer at U of Toronto Zoology Space station @ 8yrs: .| uunet!attcan!utzoo!henry henry@zoo.toronto.edu ------------------------------ Date: Wed, 4 Apr 90 20:05:02 EDT From: John Roberts Disclaimer: Opinions expressed are those of the sender and do not reflect NIST policy or agreement. Subject: Re: Discovery's spin >Subject: Re: Discovery's Spin in 2010 (Was Re: Artificial gravity) > Let's assume that the angular momentum vector of the Discovery is >aligned along the long axis of the ship during its normal operation. Say >that the Discovery is pointed directly at, say, the moon. Now, let the >bearings on the carousel seize up. The ship will start to spin about its > Christopher Neufeld....Just a graduate student | "You are looking at, > neufeld@helios.physics.utoronto.ca | ze virld's FIRST, > cneufeld@pro-generic.cts.com Ad astra! | nuclear - magnet!" > "Don't edit reality for the sake of simplicity" | Siegfried of KAOS Several postings have mentioned the bearings "seizing up". To me, that implies that they suddenly lock in position, transferring angular momentum to the rest of the craft with a sudden jerk. I don't think this would be necessary. Over a long period of time with no power applied, the bearings could gradually transfer momentum through friction until the carousel and the rest of the craft are spinning at the same rate. John Roberts cmr.ncsl.nist.gov ------------------------------ Date: 4 Apr 90 18:29:54 GMT From: att!cbnewsh!brt@ucbvax.Berkeley.EDU (benjamin.reytblat) Subject: Pegasus scrub I just heard that todays launch of Pegasus was scrubbed because of the weather. Does anyone know when the next attempt is scheduled? Ben Reytblat brt@homxc.att.com ------------------------------ Date: 4 Apr 90 20:21:57 GMT From: pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@tut.cis.ohio-state.edu (Ron Baalke) Subject: Galileo Update - 04/04/90 GALILEO MISSION STATUS April 4, 1990 Today the Galileo spacecraft is almost 128 million miles from Earth, and about 75 million miles from the Sun. Its heliocentric speed is just under 55,000 mph, and it has traveled almost 299 million miles in space since its launch last October. The spacecraft's health is excellent, and it is transmitting telemetry data at 40 bits per second. A week ago, during a Galileo tracking pass, the Canberra tracking station of the Deep Space Network experienced a massive power failure and was "off the air" for about 5 hours. A planned memory readout of stored science data from the spacecraft magnetometer, extreme ultraviolet sensor, and dust detector was lost but recovered in a commanded replay the next day. The spacecraft successfully executed a programmed sun- pointing turn without flight team monitoring during the 5- hour period. When power was restored and the system came back on line, the Canberra DSN crew re-acquired the spacecraft signal, including telemetry indicating the successful turn. Next week, starting Monday, Galileo will do a four- day trajectory-correction maneuver designed to take the first step in shaping the trajectory for the first Earth gravity- assist flyby due December 8 this year. The spacecraft will thrust periodically as planned, with tiny ten-newton rocket engines pulsing each time they rotate past the right direction, for a period of more than 6 1/2 hours each of the four days. This will slow the spacecraft in its course by about 6.2 meters per second or 14 mph each day for a total velocity change of about 25 meters per second or 55 mph. This in turn will bring the Earth distance at closest approach from 2.4 million kilometers (1.5 million miles) in the present Galileo orbit down to about one fifth that value. Several more maneuvers will gradually reduce the distance to the 950-kilometer altitude required for the Earth gravity assist. On April 17, ultraviolet spectrometer measurements will be made on the star Lyman Alpha. Ron Baalke | baalke@mars.jpl.nasa.gov Jet Propulsion Lab M/S 301-355 | baalke@jems.jpl.nasa.gov 4800 Oak Grove Dr. | Pasadena, CA 91109 | ------------------------------ Date: 4 Apr 90 04:24:15 GMT From: cs.utexas.edu!news-server.csri.toronto.edu!utgpu!utzoo!henry@tut.cis.ohio-state.edu (Henry Spencer) Subject: Re: NASA Headline News for 03/29/90 (Forwarded) In article <383@mtndew.UUCP> friedl@mtndew.UUCP (Steve Friedl) writes: >> It takes a million years and a zillion dollars to make a manipulator >> arm, human controlled. > > ... only because it was built in Canada. > Steve :-) As Spar Aerospace, builders of the Canadarm, are fond of pointing out, numerous similar nasty comments :-) were made by the US contractor who wanted the job... the same company that went on to build that gem of low cost and right-from-the-start reliability, the shuttle toilet. -- Apollo @ 8yrs: one small step.| Henry Spencer at U of Toronto Zoology Space station @ 8yrs: .| uunet!attcan!utzoo!henry henry@zoo.toronto.edu ------------------------------ Date: 4 Apr 90 21:12:51 GMT From: pacific.mps.ohio-state.edu!zaphod.mps.ohio-state.edu!brutus.cs.uiuc.edu!ux1.cso.uiuc.edu!sp20.csrd.uiuc.edu!davies@tut.cis.ohio-state.edu (James R. B. Davies) Subject: Re: Seeing the Jupiter picture (Was Re: HST Image Status) In article <40056@apple.Apple.COM>, winter@Apple.COM (Patty Winter) writes: (printing instructions deleted) |> ....Looks like Jupiter to me! Me, too. It's good to see that the second Equatorial Belt is back - it was still faded last time I looked ;-) ------------------------------ Date: 4 Apr 90 18:25:09 GMT From: mips!zaphod.mps.ohio-state.edu!samsung!rex!rouge!dlbres10@apple.com (Fraering Philip) Subject: Re: Quick launches ( was: Intelsat / Titan Failure ) Actually, this is in reply to noone in particular; About quick launches: I thought the obstacle to fast launches on many of these vehicles was the payload integration procedure. For example: the Intelsat was installed wrong (or the wrong software was used) on that Titan launch, and look what happened. Is there any way to make this cheaper, more reliable, and faster? (While we're at it, can it do windows? :-). Philip Fraering dlbres10@pc.usl.edu ------------------------------ Date: 4 Apr 90 19:47:41 GMT From: winter@apple.com (Patty Winter) Subject: Seeing the Jupiter picture (Was Re: HST Image Status) In article <22763@netnews.upenn.edu> hafken@eniac.seas.upenn.edu.UUCP (David Hafken) writes: >Hi. could someone tell me how to view the jupiter picture posted earlier on >a macintosh? e.g. how to convert it and what prog. to use to view it. David et al-- Here's how I did it. Step 1. Saved the file (as "jupiter," but obviously the actual name doesn't matter). Step 2. From the Unix shell, typed "decode