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Internet Message Format | 1991-07-08 | 17KB

Return-path: <ota+space.mail-errors@andrew.cmu.edu> 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 </afs/andrew.cmu.edu/usr1/ota/Mailbox/oaKWQVu00VcJIeMU4j>; Wed, 23 May 90 02:01:06 -0400 (EDT) Message-ID: <caKWQ2C00VcJ0eKk4s@andrew.cmu.edu> Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Wed, 23 May 90 02:00:35 -0400 (EDT) Subject: SPACE Digest V11 #441 SPACE Digest Volume 11 : Issue 441 Today's Topics: Subscription Request Voyager Update - 05/22/90 NASA Headline News for 05/18/90 (Forwarded) Re: Please rate the space magazines AIAA/THE PLANETARY SOCIETY NASA Headline News for 05/22/90 (Forwarded) ---------------------------------------------------------------------- Date: 22 May 90 23:14:48 GMT From: hpl-opus!hpnmdla!hpsad!cj@hplabs.hp.com (Chris Johnson) Subject: Subscription Request Hi, A friend of mine who does not receive notes would like to be added to the subscription list for the SPACE Digest. Note that I DO NOT wish to be added myself. The mail address is: grigsby@hal.dnet.hac.com - or - grigsby%hal.dnet.hac.com@hac2arpa.hac.com Thanks, -cj cj@hpsad.hp.com Hewlett-Packard Signal Analysis Division Rohnert Park, CA 94928 "The only opinions I have probably are vastly different from anything any corporate manager could ever conceive under any circumstances." ------------------------------ Date: 23 May 90 03:44:44 GMT From: zaphod.mps.ohio-state.edu!sdd.hp.com!elroy.jpl.nasa.gov!jato!mars.jpl.nasa.gov!baalke@tut.cis.ohio-state.edu (Ron Baalke) Subject: Voyager Update - 05/22/90 Voyager Mission Status Report May 22, 1990 Voyager 1 The Voyager 1 spacecraft continues to collect routine cruise science data. On May 11 an Ultraviolet Spectrometer (UVS) observation was taken on the star HD217675, and a Magnetometer calibration (MAGCAL) and Low Energy Charged Particles (LECP) calibration (PESCAL) were successfully executed. The MAGCAL data from looked fine and the LECP instrument responded correctly to its PESCAL. The downlink telemetry was severely degraded due to antenna pointing problems with the 70 meter antenna in Spain (DSS 63). Receiver lock was lost completely for seven minutes. On May 15 a frame of Plasma Wave (PWS) data was recorded for playback at a later date. This was the first exercise of Flight Data Subsystem (FDS) Data Mode Control (FDAMO) Block Routine (BR6). On May 16 real-time commands were transmitted to reset the Computer Command Subsystem (CCS) clock to the FDS frame time and perform a CCS timing test (CCSTIM). Execution of these commands was successful and the CCSTIM test indicated that a nominal offset (5 msec) between the FDS frame start and CCS timing chain in each processor had been achieved. Spacecraft performance for all of the sequenced activity during this report period has been nominal. Voyager 2 The Voyager 2 spacecraft also continues to collect routine cruise science data. UVS high-rate data were taken on Markarian 509 on May 14 and May 17. The two hours and 44 minutes on May 14 looked fine. The data from May 17 was badly degraded for the first two hours, leaving only 3 hours and 17 minutes of usable data. On May 15 a CCSTIM test was executed and a Attitude and Articulation Control Subystem (AACS) patch was delinked. The CCSTIM test analysis indicated a nominal offset between the FDS frame start and the CCS timing chain in each processor and the delinking of the patch was verified by AACS memory read-out. On May 17 real-time commands were transmitted to change the FDS data mode, perform a full FDS memory read-out, return the FDS data mode back to its previous state, reset the Command Loss (CMDLOS) timer, and to enable the mini-Cruise Manuever (CRSMVR) scheduled for May 23. All of these commands executed nominally and the FDS memory read-out was received. Also on May 17 a PLSCAL/MAGCAL/PESCAL sequence were executed. The BAY 1 heater was turned off and X BAND TWT was configured to the high power mode, and the AACS B and C GYROS were turned on and initialized in preparation for the mini-CRSMVR on May 23. The last hour of the MAGCAL and all of the PESCAL were not received due to lack of Deep Space Network (DSN) 70 meter support. The Plasma instrument calibration (PLSCAL) went fine. The thermal events (bay 1 heater off/XTWT to high power and BC gyros on) caused a command moratorium to be imposed that resulted in approximately one day of this period being unavailable for acquisition of ranging or coherent Doppler data. CONSUMABLE STATUS AS OF 5/22/90 P R O P E L L A N T S T A T U S P O W E R Consumption One Week Propellant Remaining Output Margin Spacecraft (Gm) (Kg) Watts Watts Voyager 1 5 36.5 + 2.0 370 59 Voyager 2 9 39.6 + 2.0 374 48 _ _____ _ | | | __ \ | | Ron Baalke | baalke@mars.jpl.nasa.gov | | | |__) | | | Jet Propulsion Lab | baalke@jems.jpl.nasa.gov ___| | | ___/ | |___ M/S 301-355 | |_____| |_| |_____| Pasadena, CA 91109 | ------------------------------ Date: 22 May 90 23:28:19 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: NASA Headline News for 05/18/90 (Forwarded) ----------------------------------------------------------------- Friday, May 18, 1990 Audio Service: 202/755-1788 ----------------------------------------------------------------- This is NASA Headline News for Friday, May 18.... After a quiet day yesterday, operators continue a steady pace to focus the Hubble Space Telescope on the first test picture. They completed a field of view mapping and analysts successfully processed the data for a pattern match. The secondary mirror is now in what engineers believe to be the "best focus position." Technicians continue to position and adjust the telescope in order to enable the wide field planetary camera to lock onto NGC 3532, a 3 billion year-old star cluster 1,260 light years away. A 24-hour note to editors will announce the expected time the pictures will arrive. ******** Meanwhile, the Cosmic Background Explorer recently sent the best pictures ever seen of the center of the Milky Way. The infrared images were combined into single pictures. The unique images are clear of the dust that usually prohibits a clear view of our galaxy. Now six-months into its two-year mission, COBE has completed its inital scan and will continue to observe the microwave radiation in the universe. ******** The Ulysses spacecraft is ready for processing at the Kennedy Space Center. It will fly a cooperative NASA-European Space Agency project to study the unexplored sun's polar regions. As current propulsion systems are unable to lift the spacecraft directly from Earth over the sun's poles, a sling-shot trajectory around Jupiter will send the probe across the sun's equator in February, 1995. The launch aboard the space shuttle Discovery is scheduled for October 5. ******** Ground crews at KSC continue to meet the overall timeline with the arrival of ROSAT at the launch pad. Attached to the Delta II booster, launch is scheduled for May 31. The satellite's mission is to map a detailed survey of X-ray sources across the sky. ******** Also at Kennedy Space Center, workers brazed the last of the lines to the replacement regulator coolant valve in the orbiter Columbia. Technicians report it looks good. Preparations are underway to perform the system pressurization test and leak checks of the new valve. The test is scheduled to begin next week. ---------------------------------------------------------------- Here's the broadcast schedule for Public Affairs events on NASA Select TV. All times are Eastern. Thursday, May 24................... 11:30 A.M. NASA UPDATE will be transmitted. 1:00-4:00 P.M. STS-35 Flight Readiness Review. ----------------------------------------------------------------- NASA Select TV: Satcom F2R, Transponder 13, C-Band 72 Degrees West Longitude, Audio 6.8, Frequency 3960 MHz. ----------------------------------------------------------------- All events and times are subject to change without notice. These reports are filed daily, Monday through Friday, at 12:00 Noon EDT. This is a service of the Internal Communications Branch, NASA HQ. ------------------------------ Date: 22 May 90 18:52:40 GMT From: cs.utexas.edu!news-server.csri.toronto.edu!utgpu!utzoo!henry@tut.cis.ohio-state.edu (Henry Spencer) Subject: Re: Please rate the space magazines In article <Added.0aIxH2_00jZdE=Rk9n@andrew.cmu.edu> HIGGINS@FNAL.BITNET (Bill Higgins-- Beam Jockey) writes: > --Where do you get most of your information about space? What do you > subscribe to, and why? ... I subscribe to a Whole Bunch of things, and there is no single primary source I'd pick out. Overall I'd give the nod to Spaceflight, JBIS, and the World Spaceflight News / Planetary Encounter combination as the best single sources, but to know a lot you have to read a lot. >Aviation Week and Space Technology Excellent coverage of the US government space program, weaker on others. Good for color pictures. Bad for in-depth technical coverage. Expensive. Flight International is better on technical, weaker on color, generally carries less but better space coverage, but is horrendously expensive. >Ad Astra [with membership in National Space Society] I'm seriously unimpressed with Ad Astra of late. I go through it very quickly, looking for the new-books list (which is good) and interviews with interesting people. >[Smithsonian] Air and Space Just started reading this. From the space viewpoint, it suffers from being mostly aviation... but it's generally good stuff. >Countdown Haven't seen it. >Final Frontier I've been picking this up only intermittently, but overall I am impressed. I would probably recommend this as the single best magazine for a casual reader. >Planetary Report [with membership in the Planetary Society] Since I don't want to belong to Chairman Carl's Cheerleaders :-), I don't see Planetary Report regularly any more. Occasional interesting stuff. Lots and lots of pretty color pictures. A bit on the biased side at times. >Spaceflight Somewhat expensive, and stronger on European and Soviet stuff than on the US program. Excellent overall. Not quite so suited to a beginner as Final Frontier. I won't comment on the professional journals, as I am (once again) depressed to note how few of them I get... >Sky and Telescope Aimed more at the serious astronomy crowd than the novices. Good coverage in considerable depth of most anything astronomy-related. >Astronomy This is the one to get to see lots of color pictures and read articles aimed at the laycreature. Highly recommended. Quite a bit of space coverage but that's not where the real emphasis is. >IEEE Spectrum Negligible space coverage, and costly unless you're into IEEE for other reasons. >Scientific American Gone downhill somewhat in recent years, I'd say, but still worth getting. I read it more selectively than I used to. Light space coverage. > --Which magazines would be good for your little sister? For my little sister I think I'd pick Final Frontier and Astronomy. > For your favorite techie? For an accountant? The techie would get WSN and PE, no question, with JBIS and some of the other professional journals as runners-up. For the accountant I think it would be Final Frontier and perhaps Air&Space. -- Life is too short to spend | Henry Spencer at U of Toronto Zoology debugging Intel parts. -Van J.| uunet!attcan!utzoo!henry henry@zoo.toronto.edu ------------------------------ Date: 22 May 90 20:50:27 GMT From: m2c!wpi!horshac@husc6.harvard.edu (Matthew J Rosenwasser) Subject: AIAA/THE PLANETARY SOCIETY Does anyone know about if the AIAA and the Planetary Society have addresses on Internet? ------------------------------ Date: 22 May 90 23:30:33 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: NASA Headline News for 05/22/90 (Forwarded) ----------------------------------------------------------------- Tuesday, May 22, 1990 Audio Service: 202/755-1788 ----------------------------------------------------------------- This is NASA Headline News for Tuesday, May 22........ Kennedy Space Center technicians are wrapping up repair work on the Space Shuttle Columbia. The orbiter's coolant system was purged and serviced with Freon yesterday and a functional test is underway. The testing of the system is expected to be completed this week. Following the servicing activities, the Shuttle management team will meet on Thursday to determine the new launch date for the ten-day astronomy mission. ******** Also at KSC, the flight readiness test of the Space Shuttle Atlantis's three main engines and the landing gear tests went well. The right orbital maneuvering system pod was installed and mid-body closeouts are in progress. Thermal protection system operations continue on schedule. Rollover to the Vehicle Assembly Building is planned for early next month. ******** Significant milestones have been met by the Hubble Space Telescope. The high gain antenna problems have been corrected. They successfully transmitted the recent focusing test images. Space Telescope Operations Control Center engineers say the images are two to three times better than ground-based telescope capabilities. It appears after traveling from darkness to light, the sudden heating of the solar panels causes them to slightly vibrate. Controllers say it can be easily fixed. The Associate Administrator for Space Science and Applications, Dr. Lennard Fisk, said he is pleased with the pace of bringing the telescope to full operation. ******** Meanwhile, at a distance of over 140 million miles, the Magellan spacecraft continues in excellent health. Flight controllers at the Jet Propulsion Laboratory in Pasadena, California, completed testing of the spacecraft's star calibration system and began tests of the radar system. Traveling at 71,000 miles per hour relative to the sun, it is now over 13 million miles from Venus. The estimated time of arrival at Venus is this August. ******** ---------------------------------------------------------------- Here's the broadcast schedule for Public Affairs events on NASA Select TV. All times are Eastern. Tuesday, May 22.............. 12:00-2:00 P.M. NASA PRODUCTIONS Hubble Space Telescope Earth Fest '90 C.A.S.I.S. Workshop (Center of Atmospheric and Space Information Sciences) Thursday, May 24............. 11:30 A.M. NASA UPDATE will be transmitted All events and times are subject to change without notice. These reports are filed daily, Monday through Friday, at 12:00 Noon, EDT. This is a service of the Internal Communications Branch, NASA HQ. Contact: JSTANHOPE on NASAMAIL or at 202/453-8425. ----------------------------------------------------------------- NASA Select TV: Satcom F2R, Transponder 13, C-Band 72 Degrees West Longitude, Audio 6.8, Frequency 3960 MHz. ----------------------------------------------------------------- ------------------------------ End of SPACE Digest V11 #441 *******************