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 ; Mon, 28 Jan 91 01:30:08 -0500 (EST) Message-ID: <4bcwHbC00WBwM1uE5Q@andrew.cmu.edu> Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Mon, 28 Jan 91 01:30:00 -0500 (EST) Subject: SPACE Digest V13 #082 SPACE Digest Volume 13 : Issue 82 Today's Topics: Superbowl Jumbotron screen employs NASA technology spinoff (Forwarded) Galileo Update - 01/24/91 decimal to hexadecimal Re: Interplanetary travel I know who you are... Re: Space Station Weights Re: SPACE Digest V13 #050 2 Questions -- Orbital Elements format / Book wanted 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: 24 Jan 91 18:58:04 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Superbowl Jumbotron screen employs NASA technology spinoff (Forwarded) [See, you knew there was a recent to support NASA! :-) -PEY] Barbara Selby Headquarters, Washington, D.C. January 24, 1991 (Phone: 703/557-5609) Cheryll Madison Goddard Space Flight Center, Greenbelt, Md. (Phone: 301/286-8956) RELEASE: 91-10 SUPERBOWL JUMBOTRON SCREEN EMPLOYS NASA TECHNOLOGY SPINOFF The huge television Jumbotron screen, that will track what may be a hotly-contested Superbowl XXV game in Florida at Tampa Stadium on Jan.27, will keep its cool, thanks to a NASA technology spinoff. Sensors, originally designed as ingestible capsules to monitor core body temperatures of human patients, will be used to monitor potentially damaging heat build-up in electronic circuits of the Jumbotron. The sensor and receiver within the jumbo screen were the result of a collaborative development effort between the NASA Goddard Space Flight Center, Greenbelt, Md., and the Johns Hopkins University Applied Physics Laboratory, Laurel, Md. The sensor originally was developed as a research tool under NASA's Technology Utilization's Applications Engineering program. The sensor has been used for research in the areas of hypo- and hyperthermia, sleep disorders, weight loss and sports medicine. "The industrial temperature sensor is a good example of the diversity of applications that can result from NASA's Technology Utilization program," said Donald Friedman, Chief, Office of Commercial Programs at Goddard. "We are very gratified about the interest manufacturers have shown in this simple device and are excited about the potential new uses. One area in which the sensor already has been used is honey production through the monitoring of beehive temperature." The huge television Jumbotrons used at National Football League sports stadiums and also at Times Square in New York City, N.Y., and at Sea World in Orlando, Fla., are built by the Sony Corporation and range from 8 by 10 feet to 33 by 110 feet. In the Jumbotron, one or two quartz crystal sensors are nestled among the electronic modules. The natural vibration frequency of these crystals increases as temperature increases. The crystal's vibration is automatically amplified and telemetered to a receiver outside the screen, which is connected by cable to a remote control panel within the stadium where the temperature is displayed. Appropriate measures then can be taken to provide the necessary cooling and prevent the Jubotron from shutting down. The industrial temperature sensor is manufactured by HTI, Inc., in St. Petersburg, Fla., the developer of the sensor's telemetry system and control panel. The sensor's extreme accuracy, up to temperatures of 260 degrees Fahrenheit, and its flexibility in download and recording of data has interested food processors, the pharmaceutical industry and manufacturing processors. Because the system uses an inductive magnetic telemetry link, it allows sensors to be used in new situations in which hard wiring is not possible or appropriate, such as in the Jumbotrons. Sony has 11 Jumbotrons operating within the United States and is recommending that all units be equipped with the temperature sensors. Already the device has been credited with enhancing reliability of the big screens by documenting the large temperature increases that occur when the Jumbotrons are turned off. The discovery of these temperature surges, which can damage or destroy electronic circuit boards within the screen, has led Sony to make a simple but important change in the cooling fan operation in the screens. By leaving the fans on for approximately 1 hour after turning off the screen, Sony eliminated damaging temperature excursions after the power has been turned off. This research is supported by Goddard's Office of Commercial Programs. ------------------------------ Date: 24 Jan 91 18:46:36 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 - 01/24/91 GALILEO STATUS REPORT January 24, 1991 Yesterday, the planned sun acquisition was successfully completed on the Galileo spacecraft. Today, no spacecraft activity is planned. A command was successfully sent to reset the Command Loss Timer. Tomorrow, spacecraft operations will consist of periodically performed activities including: o A sun acquisition (SITURN) o A MAG (Magnetometer) and DDS (Dust Detector) cruise science memory readout, and o RPM (Retro Propulsion Module) thruster maintenance It was reported yesterday that two more than the expected number of lock indications were observed in CDS (Command Data Subsystem) telemetry on January 22; an investigation is in process. ___ _____ ___ /_ /| /____/ \ /_ /| | | | | __ \ /| | | | Ron Baalke | baalke@mars.jpl.nasa.gov ___| | | | |__) |/ | | |___ Jet Propulsion Lab | baalke@jems.jpl.nasa.gov /___| | | | ___/ | |/__ /| M/S 301-355 | |_____|/ |_|/ |_____|/ Pasadena, CA 91109 | ------------------------------ Date: 21 Jan 91 12:38:37 GMT From: magnus.ircc.ohio-state.edu!ephillip%magnus.ircc.ohio-state.edu@tut.cis.ohio-state.edu (Earl W Phillips) Subject: decimal to hexadecimal Could someone give me a quick lesson ({r equation) on how to conver{ decimal numbers to hexadecimal? Thanx in advance! ***************************************************************** * | ====@==== ///////// * * ephillip@magnus.ircc.ohio-state.edu| ``________// * * | `------' * * -JR- | Space;........the final * * | frontier............... * ***************************************************************** ------------------------------ Date: 19 Jan 91 20:50:52 GMT From: sun-barr!cs.utexas.edu!news-server.csri.toronto.edu!helios.physics.utoronto.ca!ists!yunexus!hydroesm!jtsv16!geac!censor!utzoo!utgpu!cunews!cognos!geovision!gd@apple.com (Gord Deinstadt) Subject: Re: Interplanetary travel roberts@CMR.NCSL.NIST.GOV (John Roberts) writes: ]After poking at the computer a while, I got the following table showing the ]performance at various mass ratios. Thanks for the excellent posting! ] While it is true that ]delta-V is maximized when the mass ratio is about 3.9-4.0, you should note ]that the curve is very flat over a wide range of mass ratios. This means ]that delta-V is relatively insensitive to mass ratio over that range, so it ]is highly probable that some other factor will more important to costs than ]a specific mass ratio. For instance, if you run a variable-velocity ion ]drive rocket with a mass ratio of 1 instead of 4, you will get a 75% ]savings in propellant use (and a 60% savings in total mass) with only a ]14% loss of delta-V. This ignores the performance benefits you might gain ]by using a smaller container to store the propellant. I had no idea the curve was so flat. Nature is being nice, giving us room to maneuver. -- Gord Deinstadt gdeinstadt@geovision.UUCP ------------------------------ Date: Mon, 21 Jan 91 16:30:24 PST From: greer%utdssa.dnet%utaivc@utspan.span.nasa.gov X-Vmsmail-To: UTADNX::UTSPAN::AMES::"space+@andrew.cmu.edu" Subject: I know who you are... This is not space related at all, but Space_Digest is my only outlet to to network world. Maybe this message is already out there, but then again, maybe it isn't. Anyway, I heard that the Lotus Corporation is going to sell the names, addresses and phone numbers of 120,000,000 Americans on CD-ROM. This database MAY include consumer information such as: * Your Annual Salary * Your Debt-to-Earnings Ratio * Your Net Worth * Your Investment Portfolio * Your Car(s) * Your Gun(s) * Your Computer, Stereo Equipment, Video Equipment, etc. * Et Cetera... * ...and so forth... * ...and so on... I know that some of this is true, but at this time I don't know how much is just paranoia run amok. In any case, you may call toll free, 1-800-688-8320, to get a name removal packet from Lotus. Barring Acts of God, Congress, or the Courts, this set of CD-ROMs will be available in March of 1991, so act soon or it'll be too late. _____________ Dale M. Greer, whose opinions are not to be confused with those of the Center for Space Sciences, U.T. at Dallas, UTSPAN::UTADNX::UTDSSA::GREER "...that flag is a symbol of something greater than just the rights in this country." -- Rep. Larry Smith of Florida, October 12, 1989 ------------------------------ Date: 22 Jan 91 18:56:01 GMT From: sdd.hp.com!wuarchive!rex!rouge!dlbres10@ucsd.edu (Fraering Philip) Subject: Re: Space Station Weights In article <3196@polari.UUCP> crad@polari.UUCP (Charles Radley) writes: >I was especially astonished by LLNL's remark that the USSR is >"..too impoverished for major fiscal participation". This neglects >the potentially enormous benefit of having the Soviets' contribute >cheap off-the-shelf launch vehicles. This alone could make the whole >endeavor instantly viable..! The Soviets in turn would gain enormous >benefits. 1. The Soviet Union is too poor or inefficient to feed its own people without outside help. To many people this is embarrasing. 2. For the first time in history, their space program is susceptible to popular political pressure. When combined with point 1, this could mean trouble. Mars rocks aren't edible, or else Hobbes wouldn't have brought along all that tuna fish when he and Calvin went... ;-) 3. Let's wait and see what happens in the Baltic states before we declare amti-communism parochial. 4. Many people here complain that the political process itself hurts the space program, with the annual destruction and recreation of project funds, etc... Wait until you get 4 or 5 separate political processes going. Not to mention when the Japanese pork barrel politicians managing their end meet the pork barrel politicians managing ours to negotiate the trade package... When Martin Marietta starts buying golf club memberships for LDP party officials serving as liasons, there's going to be a major scandal over there. Not to mention that some of the irrational democrats will attack Japan for stealing technology... The whole point of the LLNL proposal is 'Damn the committees, full speed ahead' and international cooperation will hinder this. Phil Fraering dlbres10@pc.usl.edu "The reserve of modern assertions is sometimes pushed to extremes, in which the fear of being contradicted leads the writer to strip himself of almost all sense and meaning." Winston S. Churchill, _The_Birth_of_Britian_. ------------------------------ Date: 23 Jan 91 02:02:12 GMT From: zephyr.ens.tek.com!tektronix!sequent!crg5!szabo@uunet.uu.net (Nick Szabo) Subject: Re: SPACE Digest V13 #050 In article <6A1D9ACC200001B6@BITNET.CC.CMU.EDU> 18084TM@MSU.BITNET (Tommy Mac) writes: >Nick Szabo: I've seen you flaming people left and right since I got on this > server, but I will try to be civil while flaming you: Hmmmm..... I have flamed organizations, projects, and technology, but I don't think I have flamed people. Please let me know what I have said that makes you angry, as my intent is to get human civilization into space, not to piss people off. >You seem to feel that space stations are a no-no, or perhaps evil, because: >-They would be a manned presence in space I would _love_ to see an economical self-sutstaining manned presence in space. Space stations, at over 1 million times (6 orders of magnitude) the cost of a Winnebago, are neither economical nor self sustaining. They have no role to play in the movement of human industry or civilization into space (except perhaps a negative one in diverting funds). >-They are *OUTDATED* Indeed. The DoD needs to do things in space, rather than just go there. As I write DoD satellites are playing an important role in Iraq targeting and damage assessment. The DoD gave up on space stations in the 60's. Private industry never seriously considered them. Even NASA has now redesigned Fred so that it is a "space station" in name only. >-They would cost too much for what they deliver. 6 orders of magnitude is perhaps a bit large. >Nick, maybe in fifty years, what you say would be true. But right now, the >MIR *space station* is the pinnacle in terms of what we have learned (as a >species) I could pick many pinnacles from among the arts and sciences of our species: Bheetoven, Voyager, the Dirac equation, Rembrandt, the silicon chip, Darwin's theory of natural selection, etc. etc. Mir would never cross my mind. What exactly has Mir produced? A few $million in tourist revenue, a bungled lottery, and some crystals? While Soviets wait in food lines and raid each other's TV stations? That is the dregs, not the pinnacle. For the Soviets, for a few years, as long as they were spending $billions on space anyway, a space station made sense, because they lack the ability to perform teleoperation. Mir will not return even 10% of its investment. It will never house a signficant community of people or became self-sustaining in any way. Its era was brief and will soon be gone. >Maybe you should find some way of expressing that itty-bitty bit of >irritation that you feel toward the Soviets better-planned space >program, or our non-planned program, rather than raging on people >who have innocently concluded that a space-station would be good, >including me, many strangers from this list, and even some soviets >who know more about it than all of us put together. Conclusions are not "innocent" until proven so. Who have I "raged" at? I post my views and evidence for same, and I post my thoughts on other people's views with evidence for same. I occasionally wax sarcastic about NASA. If you think I am "raging", perhaps you are reacting emotionally to a message would rather not hear. >Hope you don't think I'm a ----head, but you have been putting the screws to >anyone who advocates anything you don't agree with. There are no problems with your head, just perhaps calm down and take my posts a bit more lightly. Here I was just stating my opinion, and now I've got all these people racked up in iron maidens. :-) -- Nick Szabo szabo@sequent.com Embrace Change... Keep the Values... Hold Dear the Laughter... ------------------------------ Date: 24 Jan 91 05:09:59 GMT From: hacker!steve@uunet.uu.net (Stephen M. Youndt) Subject: 2 Questions -- Orbital Elements format / Book wanted 1. Could somebody please explain the format of this to me? I know it's been posted before, but I didn't get it. Alouette 1 1 00424U 62B-A 1 91 17.65577570 .00000205 00000-0 23580-3 0 3802 2 00424 80.4643 74.6329 0024450 81.2634 279.1276 13.67442533412006 2. Can someone recommend a good book on orbital mechanics? I'm looking for a text with an emphasis on the math involved in artificial satellites. Any replies should be directed via e-mail. Thanks in advance. -- SMY -- Stephen M. Youndt / "Remember, no matter where you go, uunet!hacker!steve / there you are." -- B. Banzai ------------------------------ End of SPACE Digest V13 #082 *******************