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 ; Sat, 15 Dec 1990 01:54:09 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Sat, 15 Dec 1990 01:53:38 -0500 (EST) Subject: SPACE Digest V12 #659 SPACE Digest Volume 12 : Issue 659 Today's Topics: Re: $$/pound of Freedom vs LLNL (was: ELV Support...) Re: The Space Plane Astro-1 Status for 12/08/90 [0400 CST] (Forwarded) Astro-1 Status for 12/10/90 [0850 CST] (Forwarded) Galileo Update #2 - 12/05/90 Galileo Update - 12/07/90 Magellan Update - 12/07/90 NASA Prediction Bulletins: Space Shuttle Re: Shuttle Status for 12/06/90 (Forwarded) Re: Galileo Update #2 - 12/07/90 Astro-1 Status for 12/10/90 [2054 CST] (Forwarded) Administrivia: Submissions to the SPACE Digest/sci.space should be mailed to space+@andrew.cmu.edu. Other mail, esp. [un]subscription notices, should be sent to space-request+@andrew.cmu.edu, or, if urgent, to tm2b+@andrew.cmu.edu ---------------------------------------------------------------------- Date: 9 Dec 90 00:34:01 GMT From: elroy.jpl.nasa.gov!usc!cs.utexas.edu!news-server.csri.toronto.edu!utzoo!henry@ames.arc.nasa.gov (Henry Spencer) Subject: Re: $$/pound of Freedom vs LLNL (was: ELV Support...) In article <2853@polari.UUCP> crad@polari.UUCP (Charles Radley) writes: >... I have never seen a picture of LLNL showing solar >arrays and unpressurized external palletts which are the main reason >for Freedom's Truss... In case you haven't noticed, Fred is losing its truss in the latest design revision, now underway. -- "The average pointer, statistically, |Henry Spencer at U of Toronto Zoology points somewhere in X." -Hugh Redelmeier| henry@zoo.toronto.edu utzoo!henry ------------------------------ Date: 9 Dec 90 09:10:46 GMT From: elroy.jpl.nasa.gov!swrinde!cs.utexas.edu!news-server.csri.toronto.edu!utzoo!henry@ames.arc.nasa.gov (Henry Spencer) Subject: Re: The Space Plane In article <288500016@trsvax> jack@trsvax.UUCP writes: >...The X-30 will be a fully reusable (not just refurbishable >like the shuttle) craft with intended turn-around times of 1-2 days or >less, depending on how fast refueling and check-outs go. I'd say "is intended to be" rather than "will be". This thing is pushing technology a lot harder than the shuttle did. -- "The average pointer, statistically, |Henry Spencer at U of Toronto Zoology points somewhere in X." -Hugh Redelmeier| henry@zoo.toronto.edu utzoo!henry ------------------------------ Date: 8 Dec 90 20:20:37 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Astro-1 Status for 12/08/90 [0400 CST] (Forwarded) Astro-1 Shift Summary Report #19 4:00 a.m. CST Dec. 8, 1990 6/02:40 MET Spacelab Mission Operations Control Marshall Space Flight Center, Huntsville, AL The Astro telescopes continued to gather scientific data yesterday and through the night. Throughout Friday evening on the Shuttle's flight deck, Columbia's Blue shift Payload Specialist Sam Durrance and Mission Specialist Jeff Hoffman took turns manually pointing the Hopkins Ultraviolet Telescope (HUT), Ultraviolet Imaging Telescope (UIT), and the Wisconsin Ultraviolet Photo-Polarimeter Experiment (WUPPE) toward their targets while operators at Spacelab Mission Operations Control, Huntsville, Alabama, simultaneously provided the computer commands that configured systems to observe. At approximately 6 p.m. CST, all three ultraviolet telescopes acquired NGC-1535, a star in the nebula Eridanus. At 7:50, the ultraviolet telescopes began observing HD 25443, a WUPPE calibration target. Unfortunately, the WUPPE portion of the observation was lost due to pointing errors. Beginning at 8:23 p.m., BBXRT, HUT, and UIT looked at Supernova 1987A, while the WUPPE team began to prepare commands for acquiring HD 25443. The HD 25443 observation was a scheduled WUPPE team effort to fine-tune their alignment with the other instruments sharing a common pointing system. That observation began at 9:17 p.m. and was completed during target NGC 4151, at approximately 11:25 p.m. With the changeover from Blue to Red shifts, Mission Specialist Robert Parker and Payload Specialist Ron Parise took over manually maneuvering the telescopes. The HUT and UIT telescopes gathered science data on the spiral starburst galaxy NGC 253 in the constellation Sculptor, completing the observation at 10:20 p.m. Astronomers hope to better define the limits of the spiral arms of this target. The BBXRT gathered new information on the high mass X-ray target Vela X, a high mass X-ray binary star system 1630 light years from Earth, in the southern constellation Vela. During this time, the three ultraviolet telescopes focused on L2 Puppis, a red, semi-regular variable star located in the constellation Puppis. L2 Puppis is one of the first stellar sources to have water positively identified in its spectrum. Between approximately 1:15 a.m. and 2:00 a.m., all four telescopes looked at celestial targets. BBXRT looked at the celestial target Tycho; HUT and WUPPE co-observed on IC 63, a reflection nebula illuminated by Gamma Cassiopeiae in the Constellation Cassiopeiae. Scientists at the University of Wisconsin are interested in the nature of dust grains in the instellar space around reflection nebulae. The three ultraviolet telescopes gathered data on target NGC 1068 beginning at 2:45 a.m. Goddard Space Flight Center's BBXRT acquired X-ray spectrum data on this target as well. This bright Seyfert II galaxy is a source of maser emissions, highly variable radiation often detected from the molecular clouds associated with star formation. Recent studies suggest the presence of a massive, compact object in the nucleus of this galaxy, which astronomers believe may explain the turbulent motion and intense radio emissions at the galaxy's center. This observation was scheduled to have completed at approximately 3:30. ------------------------------ Date: 10 Dec 90 20:12:35 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Astro-1 Status for 12/10/90 [0850 CST] (Forwarded) Astro 1 Mission Report #44 08:50 a.m. CST, December 10, 1990 8/08:00 MET Spacelab Mission Operations Control Marshall Space Flight Center "We can't grab ahold of a piece of the universe or a couple of galaxies and play with them like physicists or chemists can play with their experiments. But we can watch them as they are and figure out what's happening," said Susan Neff, astronomer with the Ultraviolet Imaging Telescope team. Neff and the UIT team hope data they gathered last night on four very different prime galaxies will shed new light on galaxy evolution. "What we're after is understanding how galaxies change with time in the universe," said Neff. "We're also looking for star formation, partly as the result of collisions." One galaxy observed, M81, is a classic spiral galaxy, theorized to interact with nearby M82. "If we look at the hydrogen, or cold matter, around these two galaxies, we see a lot of connecting matter between the two systems," said Neff. In this case both galaxies have stayed independent. Another target galaxy, however, NGC 2146, seems to have had a head-on collision with a smaller galaxy it may have "cannibalized." "Very large clouds of hydrogen indicate recent interaction," Neff said. Neff smiled as she said: "We also got what we expect to be an absolutely spectacular set of pictures on Omega Centauri, which is a nearby globular cluster. It appears to be a merge between two smaller globular clusters." A fourth target, NGC 1316, is a radio source with faint cloud-like shells around the galaxy. "This galaxy is possibly the result of another collision or merger, and the shells around the galaxy may be where stars are sprayed out and then wrapped up around the galaxy," explained Neff. Over the next few months as the UIT team processes their film taken aboard the Space Shuttle Columbia, they hope to find new connections between these colliding galaxies and "loner" galaxies that could lead to a more complete understanding of our universe. "What we are getting here is more pieces to the big puzzle ... pieces we have never gotten before," said Neff. ------------------------------ Date: 11 Dec 90 04:30:23 GMT From: snorkelwacker.mit.edu!usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@bloom-beacon.mit.edu (Ron Baalke) Subject: Galileo Update #2 - 12/05/90 GALILEO STATUS REPORT December 5, 1990 Yesterday, the Probe checkout activity was successfully completed on the Galileo spacecraft. Preliminary "Quick-look" analysis indicates that Probe operation was normal and the health of the Probe is excellent. Early today, the spacecraft downlink telemetry rate was increased to 134.4 Kbps, the maximum rate available from Galileo. This is the first in-flight use of this data rate; data is successfully being processed and displayed by the Ground Data System (GDS). Today, the major activities already completed include updating the system fault protection response to select LGA-2 (Low Gain Antenna 2), and resetting the Command Loss Timer to 3 days, its planned value for this mission phase. Later today the VE-11 (Venus-Earth 11) Earth encounter sequence memory load will be transmitted. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 11 Dec 90 04:36:49 GMT From: usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@apple.com (Ron Baalke) Subject: Galileo Update - 12/07/90 GALILEO STATUS REPORT December 7, 1990 Today at 8 a.m. PST the VE-11 Earth encounter sequence stored on board the Galileo spacecraft became active. Several commands were sent today to disable solar-related attitude control functions in preparation for the sun occultation during tomorrow's Earth flyby. Also several other commands were sent to fine tune the Galileo power margin, to relocate the remote science platform, and to reset the Command Loss Timer to 3 days. Tomorrow the Galileo spacecraft will make its closest approach to Earth at 12:35 p.m. PST at an altitude of about 595 miles. Earth 1 Encounter science data collection activities are planned into next week. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 11 Dec 90 04:38:46 GMT From: usc!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@apple.com (Ron Baalke) Subject: Magellan Update - 12/07/90 MAGELLAN STATUS REPORT December 7, 1990 The Magellan spacecraft is presently performing nominally. All seven STARCALS (star calibrations) of the past 24 hours were successful with small attitude updates. Today the weekly update of radar control parameter and mapping quaternion files will be sent to the spacecraft. At 4:30 AM PST Magellan completed its 500th mapping orbit and almostof this data has been successfully transmitted to the Earth. The error rate on Tracks 1 and 3, now being used on Tape Recorder A, continues to climb, exhibiting similar behavior that was experienced on Tracks 2 and 4. A single tape recorder strategy is being developed which will use Tape Recorder B solely and may be implemented as early as December 14. The single tape recorder approach would result in gaps of about ten seconds when the tape recorder switches from one track to another. Since the radar is mapping about 8 kilometers of the surface in each second, the potential gaps would be about 80 kilometers. But because of the actual beam width of the radar, the gaps would vary from 60 to 70 kilometers. In the absence of engineering constraints, mission planning and the science team will determine if and when the switch from the dual to the single tape recorder strategy and placement of gaps on the surface within the operational flexibility to adjust their locations. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 11 Dec 90 22:22:43 GMT From: ncis.tis.llnl.gov!blackbird!tkelso@lll-winken.llnl.gov (TS Kelso) Subject: NASA Prediction Bulletins: Space Shuttle The most current orbital elements from the NASA Prediction Bulletins are carried on the Celestial BBS, (513) 427-0674, and are updated several times weekly. Documentation and tracking software are also available on this system. As a service to the satellite user community, the most current elements for the current shuttle mission are provided below. The Celestial BBS may be accessed 24 hours/day at 300, 1200, or 2400 baud using 8 data bits, 1 stop bit, no parity. STS 35 1 20980U 90106 A 90344.83866997 -.00026968 00000-0 -18921-3 0 214 2 20980 28.4651 302.8104 0016781 37.0789 322.9493 15.73144587 1358 -- Dr TS Kelso Assistant Professor of Space Operations tkelso@blackbird.afit.af.mil Air Force Institute of Technology ------------------------------ Date: 11 Dec 90 17:05:02 GMT From: sdd.hp.com!news.cs.indiana.edu!msi.umn.edu!cs.umn.edu!sialis!orbit!pnet51!schaper@ucsd.edu (S Schaper) Subject: Re: Shuttle Status for 12/06/90 (Forwarded) Maybe the Astro payload could be attached to Mir. :-)/2 or Columbus. ************************************************************************** Zeitgeist Busters! UUCP: {amdahl!bungia, uunet!rosevax, chinet, killer}!orbit!pnet51!schaper ARPA: crash!orbit!pnet51!schaper@nosc.mil INET: schaper@pnet51.cts.com ------------------------------ Date: 11 Dec 90 19:58:07 GMT From: sdd.hp.com!samsung!umich!sharkey!amara!mcdaniel@ucsd.edu (Tim McDaniel) Subject: Re: Galileo Update #2 - 12/07/90 In article <1990Dec11.044056.5418@jato.jpl.nasa.gov> baalke@mars.jpl.nasa.gov (Ron Baalke) writes: > As of noon (PST) Thursday, December 6, 1990, the Galileo spacecraft > is 1,066,990 miles from the Earth ... Round trip light time is 0 > minute, 14 seconds. Umm, perhaps I'm insane, but I thought c = 186282 mi/sec, which would be a round-trip time of just under 11.5 sec. > A NO-OP command was sent on November 30 to reset the Command Loss > Timer to 96 hours. It's not really a NO-OP then, is it? A NO-OP with side effects. Gak. (Reminds me of the original Alliant computers. They had two NO-OPs: integer and floating-point. The floating-point "NO-OP" actually flushed the FP pipe.) -- Tim McDaniel Applied Dynamics Int'l.; Ann Arbor, Michigan, USA Work phone: +1 313 973 1300 Home phone: +1 313 677 4386 Internet: mcdaniel@adi.com UUCP: {uunet,sharkey}!amara!mcdaniel ------------------------------ Date: 12 Dec 90 01:51:45 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Astro-1 Status for 12/10/90 [2054 CST] (Forwarded) Astro 1 Mission Report #46 8:54 p.m. CST, December 10, 1990 8/20:03 MET Spacelab Mission Operations Control Marshall Space Flight Center The eighth day of the Astro-1 Mission came to a satisfying, yet emotional end as mission managers and science investigators made final reports and comments during the afternoon shift summary briefing at Spacelab Mission Operations Control in Huntsville, Alabama. "When you come to the end of an experience like this you're sad." said Dr. Arthur Code, Wisconsin Ultraviolet Photo Polarimeter principal investigator. "It's an experience that's over with and you don't want to see it end." Dr. Code was joined by Principal Investigators Ted Stecher, Ultraviolet Imaging Telescope; Dr. Arthur Davidsen, Hopkins Ultraviolet Telescope; and Dr. Peter Serlemitsos, Broad Band X-Ray Telescope as they related preliminary science results and celebrated the mission's success. "The telescopes worked flawlessly," beamed a happy Dr. Arthur Davidsen, HUT principal investigator. Davidsen commented on how well the universe "cooperated" with his team's expectations in obtaining good science data from over 75 HUT observations. "Look, it's not quantity, but quality." explained Mission Scientist Ted Gull, as he reviewed the total number of observations viewed by the three ultraviolet telescopes and the BBXRT. A total of 135 unique astronomical sources were observed throughout the eight-day mission. When including parallel or repeated observations, the Astro-1 observatory completed 394 acquisitions. Gull was pleased with the method used by the science teams to select and schedule targets. "The science that will come out of this data is going to be tremendous," continued Gull. "We know we're going to help re-write textbooks." The work now begins for the Astro-1 science teams as they analyze and process the data recorded from these observations. The four science teams were also quick to praise the "teamwork" efforts of the Columbia astronauts and the ground crews at the Marshall Space Flight Center, the Johnson Space Center and the Goddard Space Flight Center throughout the duration of the mission. Gull summed up the briefing by refering to an earlier analogy of the mission used by Dr. Davidsen. He asked Davidsen what were the final results from the "game" between the "Huntsville Astros" and the "Universal Secrets." Davidson said with a smile, "The Astros won...by a mile." ------------------------------ End of SPACE Digest V12 #659 *******************