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 ; Sun, 2 Dec 1990 03:05:29 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Sun, 2 Dec 1990 03:04:55 -0500 (EST) Subject: SPACE Digest V12 #611 SPACE Digest Volume 12 : Issue 611 Today's Topics: HRH Cape York SpacePort MAJOR SOLAR FLARE ALERT Galileo Update - 11/26/90 Re: Total Solar Eclipses Re: MAJOR SOLAR FLARE ALERT Payload Status for 11/13/90 (Forwarded) Re: ELV Support to Space Station (1 of 2) Re: Translunar/interplanetary shuttle? Re: Jonathan's Space Report, Nov 26 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: 26 Nov 90 02:32:30 GMT From: swrinde!zaphod.mps.ohio-state.edu!samsung!munnari.oz.au!sirius.ucs.adelaide.edu.au!chook!hugh@ucsd.edu (Hugh Garsden) Subject: HRH Cape York SpacePort From the Adelaide "Advertiser" (great name for a newspaper) 24 Nov - Humble Duke sorry for his spaceport blunder The Duke of Edinburgh was forced into an embarrassing backdown yesterday over comments he made regarding the proposed Cape York spaceport. Prince Philip apologised to the Prime Minister, Mr Hawke, for his comments in Brisbane on Wednesday which suggested the Federal Government was not committed to conservation in the area earmarked for the spaceport. He said he wanted to clear up any false impressions he may have conveyed and admitted he was not fully aware of the facts when he made the comments. ....Prince Philip told a press conference in Brisbane on Wednesday that time was "running out" and the problems of the area would become more difficult to resolve. He said then the urgent priority of the federal and State authorities should be a comprehensive plan for the future of the Cape York Peninsula. But Prince Philip admitted yesterday he now knew such a plan was already in progress. ----- Hugh Garsden "I'm walking backwards for Christmas" University of Adelaide - Spike Milligan hugh@cs.adelaide.edu.au ------------------------------ Date: Tue, 27 Nov 90 01:52:16 MST From: std_oler%HG.ULeth.CA@vma.cc.cmu.edu (Cary Oler) Subject: MAJOR SOLAR FLARE ALERT X-St-Vmsmail-To: ST%"space+@andrew.cmu.edu" /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ Please Note: There has been quite an influx of requests for the document "Understanding Solar Terrestrial Reports." To all those who sent in requests, please note that this document is still being prepared and is not yet ready for circulation. It will be sent to each of you as soon as it is finished. Please be patient. To all others who are unaware, this fairly extensive document will aid in explaining the reports, alerts and warnings which are posted over the networks. It will also discuss techniques and procedures which can be used to extract information potentially useful to your field of interest. The document concentrates most heavily on radio communications, although there is relevance and reference to other fields of interest (ie. astronomical observations, telecommunications, electrical power generation, atmospheric circulation, etc.). If interested, send requests for this document to "std_oler@hg.uleth.ca". It will be e-mailed to all who request it, when completed. /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\ -- MAJOR SOLAR FLARE ALERT -- NOVEMBER 27, 1990 Potential Impact Forecast Flare Event Summary -------- MAJOR ENERGETIC EVENT SUMMARY The first major solar flare since 20 October erupted from departing Region 6368 (N18W90) at 23:17 UT on 26 November. The flare attained an X-ray class M7.5 rating, but remained only a category 1N optical flare. It began at 23:12 UT, peaked in intensity at 23:17 UT and ended at 23:29 UT. This impulsive flare lasted 17 minutes, which is rather short for a flare of this x-ray intensity. Some minor discrete radio emissions were detected, along with a suspected minor intensity SWF/SID along the sunlit portions of the hemisphere. Region 6368 will cross the west limb late on 27 November and will not reappear (assuming it does not die) until near 11 December. It continues to sport a complex Beta-Gamma-Delta configuration with persisting magnetic complexity in the trailing spot group, which has become quite difficult to resolve optically. Region 6377 (S04W29 at 24:00 UT on 26 November) continues to grow in size and has produced eight subflares over the past 24 hours. It is expected to be a frequent source for C-class flares and subflares with a risk for occassional (albeit, less frequent) M-class flaring. The Space Environment Services Center has restored the potential PCA alert status to a condition GREEN level, with the passage of Region 6368 beyond the west limb. Flare probabilities for the next 72 hours (ending 29 November) follow: Flare Probability Type 24hr 48hr 72hr -------------- ---- ---- ---- Class M Flare 60% 40% 40% Class X Flare 10% 02% 02% Proton Flare 02% 02% 01% Overall flare activity will subside as Region 6368 crosses the west limb. Region 6377 will continue to provide frequent C-class flares and subflares, although M-class flare activity should drop noticably over the next three days, provided no new hot spots rotate into view on the eastern limb. POTENTIAL TERRESTRIAL IMPACT FORECAST Todays major solar flare is not expected to have a terrestrial impact. It was too distant (on the west limb) and was not physically large enough to affect the earth from our position. Hence, the predictions and charts which were posted in the Solar Terrestrial Forecast and Review still apply and are not expected to be affected by this major flare. Geomagnetic and auroral activity has increased as expected over the past 24 hours. Currently, unsettled conditions are in progress with occassional brief bursts of active conditions. Auroral activity has remained confined to the auroral regions, but has degraded signal quality over many middle latitude regions. Conditions are expected to return to quiet to unsettled levels by 29 November, in close agreement with the prediction models previously posted. ** End of Report ** ------------------------------ Date: 27 Nov 90 15:55:02 GMT From: sdd.hp.com!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@ucsd.edu (Ron Baalke) Subject: Galileo Update - 11/26/90 GALILEO STATUS REPORT November 26, 1990 The Galileo spacecraft is now 12 days from its first Earth encounter on December 8. The spacecraft's Command Loss Timer was set to 96 hours, the planned value for this mission phase. The NIMS (Near Infrared Mapping Spectrometer) instrument which was successfully powered on last November 21 will continue its planned calibration activities. The SSI (Solid State Imaging) instrument will be turned on later today. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 28 Nov 90 21:56:36 GMT From: hub.ucsb.edu!ucsbuxa!3001crad@ucsd.edu (Charles Frank Radley) Subject: Re: Total Solar Eclipses In article <1990Nov21.010252.1303@dmp.csiro.au> sfy@dmp.csiro.au (Shane Youl) writes: >Can anyone tell me if there will be any total solar eclipses visible during >the next 12 months and suitable locations for viewing. >ADVthanksANCE >-- > ____ _____ ____ ____ > Shane Youl / \ / / / \ / \ > CSIRO Division of Mineral Products / /_____ / /_____/ / / > PO Box 124 Port Melbourne 3207 / / / / \ / / > AUSTRALIA \____/ _____/ / / \ \____/ > Internet : sfy@dmp.CSIRO.AU > Phone : +61-3-647-0211 SCIENCE ADVANCING AUSTRALIA - Yes, 11 July 1991 total solar eclipse visible from Hawaii through Baja Mexico (Cabo San Lucas) through central and south America. Totality longest at Baja, (over 6 minutes) also best weather prospects plus sun nearly overhead. Totality at Hawaii is 2.5 hours earlier, lasts only 4.5 minutes (approx) and sun is lower. I will send you e-mail with more info. - btw, I am going to Baja, and my group is trying to contact any radio amateurs in Hawaii who would be able to communicate with our Baja group,to describe the location of prominences etc, so we can be better prepared to view them when the track reaches us. Would appreciate any help anybody can provide there. ------------------------------ Date: 28 Nov 90 11:26:37 GMT From: eru!hagbard!sunic!mcsun!ukc!icdoc!syma!andy@bloom-beacon.mit.edu (Andy Clews) Subject: Re: MAJOR SOLAR FLARE ALERT From article <901127015216.20403230@HG.ULeth.CA>, by std_oler@HG.ULeth.CA (Cary Oler): > Please Note: > > There has been quite an influx of requests for the document > "Understanding Solar Terrestrial Reports." To all those who sent in > requests, please note that this document is still being prepared and is not > yet ready for circulation. It will be sent to each of you as soon as it is > finished. Please be patient. I wonder if it would be easiest for all concerned, not least the author and intended distributor of the above document, merely to post it to the net when it is is finished, so that those who would like a copy can just save it? This of course assumes the document is of a reasonable size - I'd hate to be accused of encouraging network congestion with broadcasts of large documents. Regards, Andy -- Andy Clews, Computing Service, Univ. of Sussex, Brighton BN1 9QN, England JANET: andy@syma.sussex.ac.uk BITNET: andy%syma.sussex.ac.uk@uk.ac ------------------------------ Date: 29 Nov 90 19:53:29 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Status for 11/13/90 (Forwarded) Daily Status/KSC Payload Management and Operations 11-13-90. - STS-35 ASTRO-1/BBXRT (at Pad-B) Experiment monitoring continues. - STS-39 AFP-675/IBSS/STP-01 (at CCAFS) CITE preps continue at the VPF. STP-01 will arrive at CCAFS today. - STS-40 SLS-1 (at O&C) Power on IPR/PR troubleshooting will be performed today. CITE closeout operations continue. - STS-37 GRO (at PHSF) No work is scheduled for today. - STS-42 IML-1 (at O&C) Module staging will be active today. - STS-45 Atlas-1 (at O&C) Experiment and pallet staging continue. - STS-46 TSS-1 (at O&C) Power on systems testing continues. - STS-47 Spacelab-J (at O&C) Rack staging will work today. Also the SREM will be unloaded. - STS-67 LITE (at O&C) Pallet staging will be active today. - HST M&R (at O&C) Preps for the transportation of the pallet to GSFC will be active today. ------------------------------ Date: 29 Nov 90 14:53:50 GMT From: sumax!amc-gw!thebes!polari!crad@beaver.cs.washington.edu (Charles Radley) Subject: Re: ELV Support to Space Station (1 of 2) >That is not the point. Any material can carry any load, if it has big >enough cross section. It >enough stress. Structure carrying centrifugal loads is heavier than >structure which does not. + Charles, you could easily check this yourself. If the rotating mass + is 80,000 lbs/half, and it averages 1/2 G, then the total tension is + 40,000 lbs. If the diameter is 15 feet, then the internal 7.5 psi + pressure exerts a tension of 190,000 lbs, nearly 5 times the load + from centrifugal effects. + What really appalls me is that you had similar numbers available +to you from the net, and failed to find your incorrect assertion +before posting. I hoped for better from you. My original statement was correct as written, read it again. Thank you for adding more numbers, I note that the big volume of a spinning station means it must accomodate a very substantial pressure load compared with a non- spinning station, another weight penalty. >__Why_exactly_do_LLNL_want_to_spin_the_thing_anyway_?__I_cannot_see_any >advantage where crews are rotated every 90 days. And half the fun for the >astronauts is the zero-gee.... + Blinders on again... Charles, this could easily be another of + those cost-saving measures. Crews do not *have* t+o be rotated + every 90 days, which reduces transport (and thus life-cycle) costs. + You keep assuming the weaknesses of NASA's design when talking + about LLNL's design. This is fallacious thinking. Wrong. Crews must be rotated every 90 days to limit exposure to ionizing radiation. Shieliding is to be provided to permit a maximum safe stay of one year based on allowable accumulated dose. 90 days provides a margin of safety. LLNL at a higher altitude will have a more severe radiation environment than Freedom. Also, the shielding capability of LLNL's non-metallic structure is much less than Freedoms aluminum modules. ------------------------------ Date: 29 Nov 90 22:29:46 GMT From: prism!dsm@gatech.edu (Daniel McGurl) Subject: Re: Translunar/interplanetary shuttle? In article <7633@eos.arc.nasa.gov> millard@eos.UUCP (Millard Edgerton) writes: >If the engines(mains) are not restartable, HOW DO THEY FIRE TO DE-ORBIT? > >THINK ABOUT IT! You know, come to think about it, I guess they use the main engines for everything. Docking with sats, orbital corrections. Gosh, you can probably restart the engines 20 times a flight if you need to. :) :) :) Please, don't "THINK ABOUT IT", but rather read about it. -- Daniel Sean McGurl "How simple the game Office of Information Technology and when all it's rules are respected." Information and Computer Science Major at: Georgia Institute of Technology ARPA: dsm@prism.gatech.edu ------------------------------ Date: 29 Nov 90 22:10:34 GMT From: snorkelwacker.mit.edu!usc!cs.utexas.edu!news-server.csri.toronto.edu!utgpu!utzoo!henry@bloom-beacon.mit.edu (Henry Spencer) Subject: Re: Jonathan's Space Report, Nov 26 In article <2084@cfa237.cfa250.harvard.edu> mcdowell@cfa250.harvard.edu (Jonathan McDowell) writes: >... This will be the last spaceflight by an Apollo astronaut; >Brand first flew on the last Apollo mission, the 1975 Apollo-Soyuz flight. Last I heard, John Young was still on flight status (theoretically)... -- "The average pointer, statistically, |Henry Spencer at U of Toronto Zoology points somewhere in X." -Hugh Redelmeier| henry@zoo.toronto.edu utzoo!henry ------------------------------ End of SPACE Digest V12 #611 *******************