Return-path: X-Andrew-Authenticated-as: 7997;andrew.cmu.edu;Ted Anderson Received: from hogtown.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, 18 Jan 91 18:41:35 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Fri, 18 Jan 91 18:41:28 -0500 (EST) Subject: SPACE Digest V13 #060 SPACE Digest Volume 13 : Issue 60 Today's Topics: Viking landers Re: some questions Payload Status for 01/16/91 (Forwarded) 2 dimensional objects Payload Summary for 01/17/91 [#2] (Forwarded) Payload Status for 01/18/91 (Forwarded) Re: Fwd: NASA Plans To Redesign Space Station Re: Radiation belts and moons Administrivia: Submissions to the SPACE Digest/sci.space should be mailed to space+@andrew.cmu.edu. Other mail, esp. [un]subscription requests, should be sent to space-request+@andrew.cmu.edu, or, if urgent, to tm2b+@andrew.cmu.edu ---------------------------------------------------------------------- Date: 16 Jan 91 21:31:32 GMT From: usc!julius.cs.uiuc.edu!news.cs.indiana.edu!maytag!watstat.waterloo.edu!dmurdoch@apple.com (Duncan Murdoch) Subject: Viking landers Are the Viking landers still transmitting? I ask because I didn't think they were, but my 3-year-olds Fisher Price telescope (which is a dreadful toy, and should be avoided - what a way to convince you that you'll never see anything good in a telescope!) has a little booklet saying that they're still sending back pictures. I figure there might be some basis for the statement, even if photos aren't coming back any more. Duncan Murdoch dmurdoch@watstat.waterloo.edu ------------------------------ Date: Thu, 17 Jan 91 16:44 CST From: blue hurkle on the sill Subject: Re: some questions writes: >>3) Which are the Pioneers/Voyagers that have left the Solar >>Syatem? >Pioneer 10 & 11, and Voyager 1 & 2. I'm CERTAIN that thi shas been covered before; but what exactly does it mean to "leave the solar system?" I thought that interstellar space was defined by the amount of energy being received by a star (in this case, the Sun) being no greater that that coming from surrounding stars? (Or something like that.) Also, what about the Oort cloud; is that a part of the Solar System, and have any spacecraft passed through it? Forgive my naivete (or just ignorance), but I'm ONLY a philosophy student... /\____ 2108 Hayes Street; # 415 \ \ Nashville, TN 37203 \ SUMATRA & ENVIRONS, Ltd. O \_ \_ \ Jon Ciliberto < \ "There are many ways of leaping, \ <_ the essential being to leap." O \_ CILIBERT@vuctrvax - Albert Camus "The Myth of Sisyphus" o. \ \ >__/\___/ ------------------------------ Date: 18 Jan 91 18:33:55 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Status for 01/16/91 (Forwarded) Daily Status/KSC Payload Management and Operations 01-16-91 - STS-35 ASTRO-1/BBXRT (at VAB) Freon servicing GSE preps and validations continue today along with DDU troubleshooting. - STS-39 AFP-675/IBSS/STP-01 (at VPF) The IBSS/CITE end-to-end test will be performed today. - STS-40 SLS-1 (at O&C) Power on testing will be active today. - STS-37 GRO (at PHSF) Fueling post-operations continue. - STS-42 IML-1 (at O&C) Spacelab integration continues today. - STS-45 Atlas-1 (at O&C) Experiment and pallet staging continue. - STS-46 TSS-1 (at O&C) Pallet staging continues along with sets off-line operations. - STS-47 Spacelab-J (at O&C) Rack 7 and 10 integration continues. - STS-50 USML (at O&C) No work is scheduled for today. - STS-62 LITE-1 (at O&C) No work is scheduled for today. ------------------------------ Date: 18 Jan 91 15:28:05 GMT From: att!mcdchg!tellab5!vpnet!vortex@ucbvax.Berkeley.EDU (Jason J. Levit) Subject: 2 dimensional objects The last "Star Trek: The Next Generation" episode had a very interesting science fiction story with it. However, I just could not figure out how they think it could work. The plot was a bunch of 2 dimensional objects (no height) surrounded the Enterprise and was dragging it along. I won't bore you with the other details, as that was the main plot. 2 dimensional objects (beings?) without any height? WHAT? Is this plausible in a 4 dimensional universe? -- Jason J. Levit Tornado Chaser Extraordinaire vortex@vpnet.chi.il.us Boing...boing...boing...boing...listen to all that bouncing mail out there! A good planet is hard to find; let's save this one! ------------------------------ Date: 18 Jan 91 18:47:46 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Summary for 01/17/91 [#2] (Forwarded) KSC PAYLOAD STATUS REPORT January 17, 1991 Mitch Varnes 407/867-2468 FTS 823-2468 ---------------------------------------------------------------- STS-39 (Late February 1991) Pre-flight checkouts and testing of the STS-39 payloads continue to proceed on schedule in both the Orbiter Processing Facility (OPF) and the Vertical Processing Facility (VPF). The CRO and MPEC payloads are mounted in the forward section of Discovery's payload bay and undergoing checkouts in the OPF. AFP-675, IBSS/SPAS-2 and STP-1 are hanging vertially in the VPF. The IBSS/SPAS-2 End-to-End Test and Interface Verification Test and STP-1 End-to-End test were all satisfactorily completed this week. These three payloads are scheduled to be transported from the VPF to the launch pad on February 1. STS-40 (May 1991) Space Life Sciences-1 No significant problems are being worked. A three-day-long health check of the SLS-1 experiments and module should be com- pleted by the end of the week. SLS-1 is scheduled to be transported from the Operations and Checkout Building and imple- mented into the orbiter Columbia at the OPF on or about March 7. STS-42 (November 1991) International Microgravity Laboratory-1 Checkouts and testing of the IML-1 elements continues inside the Operations & Checkout Building High Bay. The IML-1 payload was transferred to the Spacelab Integration area in Test Stand 2. The IML-1 floor and experiment rack integration is underway. STS-47 (August 1992) Spacelab-Japan Integration of #7 SL-J rack is proceeding inside the Operations & Checkout Building High Bay. Representatives from both NASDA and Mitsubishi Heavy Industries are on-hand and assisting with the operations. ------------------------------ Date: 18 Jan 91 20:38:42 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Status for 01/18/91 (Forwarded) Daily Status/KSC Payload Management and Operations 01-18-91 - STS-35 ASTRO-1/BBXRT (at VAB) Freon servicing GSE preps and validations continue today along with DDU troubleshooting. - STS-39 AFP-675/IBSS/STP-01 (at VPF) CIRRIS vacuum servicing continues today. - STS-40 SLS-1 (at O&C) Power on testing continues. - STS-37 GRO (at PHSF) At the VPF, facility preps continue. - STS-42 IML-1 (at O&C) The experiment train will be rolled into the module today. - STS-45 Atlas-1 (at O&C) Experiment and pallet staging continue. - STS-46 TSS-1 (at O&C) Pallet staging continues along with sets off-line operations. - STS-47 Spacelab-J (at O&C) Rack 7 integration continues along with FSS cable modifications. - STS-50 USML (at O&C) Rack 6 structural modifications will be active today. - STS-62 LITE-1 (at O&C) Pallet cleaning will be performed today. ------------------------------ Date: 17 Jan 91 16:24:33 GMT From: mentor.cc.purdue.edu!mace.cc.purdue.edu!dil@purdue.edu (Perry G Ramsey) Subject: Re: Fwd: NASA Plans To Redesign Space Station In article , dlbres10@pc.usl.edu (Fraering Philip) writes: > In article <395@borg.cs.unc.edu> leech@homer.cs.unc.edu (Jonathan Leech) writes: > > >If adopted, this would help vindicate Oliver Harwood's modular > >tetrahedral station approach. Having the temerity to propose it got him > >kicked out of Rockwell in the mid-80s. > > You mean they're still doing things like kicking people out of organizations > for coming up with different ideas on how to do things? It wasn't so much for coming up with the idea, it was for not giving up on it after NASA decided that they didn't want it. Whether NASA's decision in the end was right or wrong, at some point you have to quit complaining and do what the boss says. -- Perry G. Ramsey Department of Earth and Atmospheric Sciences perryr@vm.cc.purdue.edu Purdue University, W. Lafayette, IN USA dil@mace.cc.purdue.edu Why waste time learning when ignorance is instantaneous? -- Hobbes ------------------------------ Date: Thu, 17 Jan 1991 20:37:20 CST From: REIFF@SPACVAX.RICE.EDU (Pat Reiff (713)527-8750-2650) Subject: Re: Radiation belts and moons X-Vmsmail-To: SMTP%"space+@andrew.cmu.edu" Bill Higgins correctly points out that satellites absorb energetic particles, and that this effect has been used to discover additional satellites of the giant planets. Unfortunately, the dip in the energetic particles is not long-lasting enough to provide a safe shelter. The energetic particles trapped in the magnetic field tend to corotate with the planet (faster than the satellite's Keplerian velocity), so the *leading* side of the satellite would be safest, but diffusion is pretty quick to fill up the gap. Also, for the more distant satellites, the particle gyroradius (the size of the circle that a particle makes orbiting a magnetic field line) becomes large compared to the satellite dimension, so that the shadow is not sharp. This is a "thermal velocity" larger than the flow velocity, so the bombardment to the satellite is almost uniform on the surface if the flow velocity is smaller than the thermal velocity. Think about putting your hand out the car window - your speed is much less than the speed of sound in air, so that although there is a wake side of your hand where the flow pressure is less, the atmospheric pressure nevertheless is still about what it is if you were not moving - there are still a lot of air particles hitting the back side of your hand. And the particles trapped in the Jovian magnetosphere are so energetic (MeV), that it would take a lot of shielding to make any significant reduction in your radiation dosage. (This is also true on the lunar surface - 10 meters of regolith will only reduce the REM dosage by about a factor of two from a severe solar flare) ------ From the First Space Science Department in the World: : _^ ^_ ____ Patricia H. Reiff : / O O \ |GO \ Department of Space Physics and Astronomy : \ V / |OWLS\ Rice University, Houston, TX 77251-1892 : / ""R"" \__/ internet: reiff@spacvax.rice.edu (128.42.10.3) \ ""U"" / SPAN: RICE::REIFF : _/|\ /|\_ "Why does man want to go to the Moon? ... Why does Rice play Texas?" ....JFK, Rice Stadium, 1962 ------------------------------ End of SPACE Digest V13 #060 *******************