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, 3 Mar 90 01:32:12 -0500 (EST) Message-ID: <8ZvqHE200VcJ46pk5M@andrew.cmu.edu> Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Sat, 3 Mar 90 01:31:45 -0500 (EST) Subject: SPACE Digest V11 #102 SPACE Digest Volume 11 : Issue 102 Today's Topics: NASA Prediction Bulletins: Space Shuttle NASA Prediction Bulletins: Space Shuttle Shuttle Payload Bay Question Re: Geosync DSN (was Re: Cheap DSN?) Lunar Comm. Error codes Help on Nasa Prediction Bulletins One Small Step for a Space Activist for March 90 Payload Status for 03/01/90 (Forwarded) ---------------------------------------------------------------------- Date: 3 Mar 90 01:53:26 GMT From: helios.ee.lbl.gov!ncis.tis.llnl.gov!blackbird!tkelso@ucsd.edu (TS Kelso) Subject: NASA Prediction Bulletins: Space Shuttle The most current orbital elements from the NASA Prediction Bulletins are carried on the Celestial RCP/M, (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 RCP/M may be accessed 24 hours/day at 300, 1200, or 2400 baud using 8 data bits, 1 stop bit, no parity. STS 36 1 20512U 90 19 A 90 60.79907196 .00287007 49022-4 25599-3 0 70 2 20512 61.9920 173.5205 0002824 129.5693 149.1093 16.12511850 235 -- Dr TS Kelso Assistant Professor of Space Operations tkelso@blackbird.afit.af.mil Air Force Institute of Technology ------------------------------ Date: 2 Mar 90 07:47:52 GMT From: pasteur!helios.ee.lbl.gov!ncis.tis.llnl.gov!blackbird!tkelso@ucbvax.Berkeley.EDU (Thomas S. Kelso) Subject: NASA Prediction Bulletins: Space Shuttle The most current orbital elements from the NASA Prediction Bulletins are carried on the Celestial RCP/M, (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 RCP/M may be accessed 24 hours/day at 300, 1200, or 2400 baud using 8 data bits, 1 stop bit, no parity. STS 36 1 20512U 90 19 A 90 59.44767390 .00292862 43524-4 97414-4 0 27 2 20512 61.9935 179.0635 0006854 282.7305 76.9739 16.25535875 15 -- Dr TS Kelso Assistant Professor of Space Operations tkelso@blackbird.afit.af.mil Air Force Institute of Technology ------------------------------ Date: 3 Mar 90 02:17:05 GMT From: mcgill-vision!mcgill-vision!frank@bloom-beacon.mit.edu (Frank P. DiGiuseppe) Subject: Shuttle Payload Bay Question All this talk about LDEF, and whether it was protected from the atmosphere, has me wondering: when and how is pressurization/depressurization of the payload bay performed? Is the bay air-tight? Is contained air simply released when the doors are opened in orbit (I kind of doubt this...)? Is re-pressurization performed after landing? Thanks, Frank ------------------------------------------------------------------------------- Frank P. DiGiuseppe McGill Research Centre for Intelligent Machines frank@larry.mcrcim.mcgill.edu Computer Vision and Robotics Lab, Dept. EE, Mcgill University, Montreal ------------------------------------------------------------------------------- ------------------------------ Date: 28 Feb 90 16:47:27 GMT From: snorkelwacker!usc!cs.utexas.edu!jarvis.csri.toronto.edu!utgpu!utzoo!henry@bloom-beacon.mit.edu (Henry Spencer) Subject: Re: Geosync DSN (was Re: Cheap DSN?) In article <15210@bfmny0.UU.NET> tneff@bfmny0.UU.NET (Tom Neff) writes: >It seems to me this is a case where GEO would help. Deploying a few >really BIG guidable antenna arrays in geosynchronous orbit, parked over >dedicated ground stations, would allow tracking and commanding probes >all over the solar system without usurping valuable observatory time. Well, the DSN dishes are primarily for space communications; use of them for things like interplanetary radar observations is secondary. (They weren't originally built for it, but they do have ultra-low-noise receivers, and they do have massive emergency transmitters for punching a signal into the low-gain antenna of a tumbling planetary probe, and the combination turned out to work pretty well for radar astronomy.) Normal radio telescopes get dragged into it only for once-in-a-lifetime events like the Voyager encounters, when it really pays to have most of Earth's total big-dish area pointed in one direction. JPL et al have looked at the idea of putting antennas in orbit. It would have advantages and disadvantages. The decisive counterargument right now is that it would be very expensive and there is not enough deep-space traffic to justify it. -- "The N in NFS stands for Not, | Henry Spencer at U of Toronto Zoology or Need, or perhaps Nightmare"| uunet!attcan!utzoo!henry henry@zoo.toronto.edu ------------------------------ Date: Fri, 2 Mar 90 08:13 CST From: GOTT@wishep.physics.wisc.edu Subject: Lunar Comm. Is there an accepted way for calculating how far away the horizon is for an observer at a given height? I'm trying to figure out how many 500m relay towersit would take to link two bases 1000km apart. I tried using the radius of the moon, triangles and trig., but... I don't think the accuracy is there i.e. 500m is pretty small compared to the Moons radius so the similar triangles are pretty close to exactly the same. :( George K. ott gott@wishep.physics.wisc.edu ------------------------------ ReSent-Message-ID: ReSent-Date: Fri, 2 Mar 90 12:02:18 -0500 (EST) ReSent-From: "Todd L. Masco" ReSent-To: Space Date: Wed, 28 Feb 90 11:47:14 GMT From: Joe DIVito Subject: Error codes X-Envelope-To: SPACE-RE@ANDREW.CMU.EDU This is more of a computer question then a space question. Does anyone know what the Error Correcting Codes, for their transmissions, of explorer type space craft (Mariner, Voyager, Galilaio ...) are. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- = JOSEPH DIVITO SETON HALL UNIVERSITY - = Z114@SETONVM.BITNET OR Z114@SETONMUS 400 SOUTH ORANGE AVENUE - = "GO PIRATES" SOUTH ORANGE, NEW JERSEY 07079 - =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=- DAD - IT BOTHERS ME THAT THIS WAGON DOES NOT HAVE A SEATBELT AND WOULD NOT WITHSTAND A 30 M.P.H. IMPACT WITH A STATIONARY OBJECT. - CALVIN ------------------------------ Date: 27 Feb 90 14:50:01 GMT From: mcsun!ukc!tcdcs!swift.cs.tcd.ie!ccvax.ucd.ie!h235_027@uunet.uu.net Subject: Help on Nasa Prediction Bulletins Could someone please explain to me what the data values supplied in the NASA Prediction Bullitin mean and in which order they are transmitted.For example how do I know where to find the Ecceentricity,Mean Motion ,Etc. I am trying to use this data for prediction of satellites passing and it is rather difficult when you arn't sure what you are typing in is the order of what is being transmitted. Basicically I would like to have the names of each of the data elements supplied by the Nasa prediction bulltion ------------------------------ Date: 1 Mar 90 14:18:40 GMT From: ox.com!itivax!vax3!aws@CS.YALE.EDU (Allen W. Sherzer) Subject: One Small Step for a Space Activist for March 90 One Small Step for a Space Activist... by Allen W Sherzer Tim Kyger Meet Your Congresscritter! One of the most effective ways to influence your Congresscritter is to meet with them. This is not as hard as it sounds; members of Congress are very interested in what you think. Several NSS chapters including Ann Arbor, San Diego, L.A. and Tucson have met with their representatives to discuss the proposed Space Transportation Services Purchase Act (HR 2674). This important legislation has picked up cosponsors and is closer to passage because of the efforts of these chapters. Meeting your representative can be very productive. A representative usually assumes that a letter from a constituent represents the view of about 100 other people (this is because very few people ever write). If somebody goes to the effort to meet with him or her, that is the equivalent several letters. From a single meeting you can then go on to form a long term relationship. Arranging a meeting is simple but requires patience. First, you need to read the legislation you are interested in (we can get a copy of HR 2674 for you if you need it). Next, write a letter to your representative expressing your position and asking to meet with him or her. The next step is to read the testimony on the bill (we can also get this to you; contact us) and become familiar with it. After about two weeks, call one of the Space Staffers to get them to 'grease the wheels' for you. You can call either Tim Kyger ((202) 225-2415) if your representative is a Republican or Elisa Wynn ((202) 225-6161) if he or she is a Democrat. If you don't know, call your Public Library. Sometime later, a schedular for your representative will call you about the meeting. If they haven't called after a couple of weeks, call Tim or Elisa and ask what to do. The schedular may ask you questions about the bill and space in general to make sure you know what you are talking about. She will then either put you on the schedule or promise to schedule you later on. Make sure you get a promise that they will schedule you by some fixed date. If you are not on the schedule, followup once a week to nudge them a bit. Be polite but persistent. The meeting will probably happen during a time when Congress is in recess. The next two recesses are April 6 to 17 and May 25 to June 3. These time slots fills up fast so you need to start as soon as you can. Eventually, you will have a meeting. The meeting could be in the representative's office or in a restaurant. You should have an informal presentation ready to give. Assume the representative knows little about space, but be flexible (he or she may want to go right to the heart of the matter). Some Do's and Don'ts for the meeting are: Do's * Dress nice; this is a formal meeting. It shows you think this is important. * Have a small number of people there; don't overwhelm. * Thank the Congresscritter. They are busy people and their time is valuable. * Pay for the coffee if you meet in a public place (unless he or she offers to pay). * Be flexible in your presentation. For example, he or she may want to skip over all your introductory material and get to the heart of the issue. * Make specific requests (cosponsor the bill, vote for the bill, etc.) and get a promise to fullfill them. * Practice your presentation beforehand. Have a devil's advocate ask HARD questions. * List action items at the end of the meeting. The representative should have one to inform you of his or her decision and he may have requests for you. Dont's * Color or slant your presentation; the facts should speak for themselves. * Don't lie about anything; if you don't know SAY SO! If a Congresscritter thinks you lied to him your credibility will be shot forever. * Don't threaten or promise support. You aren't a power broker. This is another good way to toss out your credibility. Finally, followup. Your action items should have dates on them; make sure you do yours on time. If you haven't heard from your representative when his or hers are due, call the schedular and politely ask if a decision has been made. Once again, be polite but persistent: the squeeky wheel gets the grease. Legislative Roundup Space Transportation Services Purchase Act (HR 2674) Five more Congrescritters have become cosponsors as the result of a 'Dear Colleague' letter recently sent. In addition, Congressman Carl Pursell (R) of Michigan has cosponsored after meeting with members of the Ann Arbor chapter (See, it works). This is good news but more cosponsors are needed. Support is broad and bipartisan but our help still vital. Things to do are: 1. Write or call your representative and ask him to: A. Cosponsor HR 2674. B. Speak to Congressman Nelson (D FL) about sending the bill to markup. 2. Ask to meet with your representative on this issue (now you know how to). 3. If you are from Florida, call Congressman Nelson's office ((202) 225-3671) and ask him to send HR 2674 to markup. If you know somebody from Florida, get them to call. NASA Budget for FY 91 Very few federal agencies got more money this year -- NASA, however, was one that did. The President is proposing an increase of 24% above last years appropriation. However, this means NASA will be a bigger target in Congress. Effort on our part will be needed to insure that good programs aren't killed. Finally, if you need help on any of this contact: Allen Sherzer (313) 769-4108 (work) (313) 973-0941 (home) aws@iti.org (Internet) Tim Kyger (202) 225-2415 (work) (703) 548-1664 (home) ----------------------------------------------------------------------------- | Allen W. Sherzer |Archie: These guys are terrorists. Know what that means?| | aws@iti.org |Lorenzo: No prisoners! | | |Recce: You say that like there was some other way. | ------------------------------ Date: 1 Mar 90 22:47:49 GMT From: trident.arc.nasa.gov!yee@ames.arc.nasa.gov (Peter E. Yee) Subject: Payload Status for 03/01/90 (Forwarded) Daily Status/KSC Payload Management and Operations 03-01-90 - STS-31R HST (at VPF) - Yesterday the CTV was electrically tested with MILA and HST cleaning was performed. Today MILA/CTV checks will continue and the HST protective cover will be reinstalled. - STS-32R SYNCOM/LDEF (at SAEF-2) LDEF deintegration continues. - STS-35 ASTRO-1/BBXRT (at O&C) - Velcro patch installation and MLI closeout were worked yesterday and will continue today. - STS-40 SLS-1 (at O&C) - The systems test was active yesterday and will continue today. Experiment functional checks will also continue today. - STS-42 IML (at O&C) - Racks 8 and 11 staging operations were worked yesterday. Racks 9 and 11 staging will continue today. - STS-45 Atlas-1 (at O&C) - Forward and aft orthogrid hardpoint installations were worked yesterday and will continue today. - STS-46 TSS-1 (at o&C) - PPCU checkout will continue today. - HST M&R ORUC cable system installation will continue today. ------------------------------ End of SPACE Digest V11 #102 *******************