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 ; Tue, 7 May 91 01:25:10 -0400 (EDT) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Tue, 7 May 91 01:24:58 -0400 (EDT) Subject: SPACE Digest V13 #496 SPACE Digest Volume 13 : Issue 496 Today's Topics: Re: Saturn V and Design Reuse: Saturn VI? (RBB: Real Big Booster) Galileo Update On CNN NASA Prediction Bulletins, Part 2 Re: Tethers Holding Down an Atmosphere (was Re: Teraforming Venus?) 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: 2 May 91 21:08:14 GMT From: mentor.cc.purdue.edu!mace.cc.purdue.edu!dil@purdue.edu (Perry G Ramsey) Subject: Re: Saturn V and Design Reuse: Saturn VI? (RBB: Real Big Booster) In article <91122.130424GIPP@GECRDVM1.BITNET>, GIPP@gecrdvm1.crd.ge.com writes: > In article <1991May2.135503.24999@en.ecn.purdue.edu>, irvine@en.ecn.purdue.edu > (/dev/null) says: > > > > > >Legally, people are trying to reduce emissions on cars. On rockets > >there are no restrictions. Maybe start putting restrictions on > >emissions of launchers? > Gee, if you thought SSME's were a hassle, just think of the giant > pump you would need to inject enough air into the exhaust fumes to > dilute em to spec...that's all they do to cars isn't it (you know.. > the solution to pollution....)? Not really. The "smog pump" on cars injects extra oxygen into the exhaust stream in an attempt to fully oxidize the unburned hydrocarbons and carbon monoxide. Piston engines tend to run a bit rich to ensure reliable combustion. Rocket engines run a bit rich to prevent reliable combustion (of the nozzle structure!), but they are a lot closer to stoiciometric that a car. Criticisms of SRB's being dirty are valid, but principally because of 1. The amount of chlorine they dump into the stratosphere, and 2. The amount of garbage in general they get onto the spacecraft. The birds KSC don't really seem to mind. -- Perry G. Ramsey Department of Earth and Atmospheric Sciences dil@mace.cc.purdue.edu Purdue University, West Lafayette, IN USA perryr@purccvm He's Here! Ariel Gilbert Ramsey, b. 24 APR 91, 8 lb 7 oz., 21". Stoic. ------------------------------ Date: 2 May 91 02:36:43 GMT From: dog.ee.lbl.gov!hellgate.utah.edu!caen!uakari.primate.wisc.edu!samsung!news.cs.indiana.edu!ariel.unm.edu!cs.umn.edu!kksys!wd0gol!newave!john@ucbvax.Berkeley.EDU (John A. Weeks III) Subject: Galileo Update On CNN CNN ran an update of Galileo during Prime News tonight. They showed several Jet Propeller Lab people working with a duplicate of the high gain antenna. They think that the problem has to do with the retainer mechanism that kept the antenna in its launch mode position. They further think that the retainer is warped from the heat of the Sun, which prevented one or more of the antenna ribs from unfolding. The Galileo high gain antenna is a series of ribs that unfold much like an umbrella. There appears to be some type of wire mesh material the fills in the area between the ribs making up the antenna dish. The JPL person that was interviewed said that they have not tried anything yet because they are not sure what went wrong. He said that manuvering the space craft to put the antenna in the shade might help. He concluded by saying that they will get serious about building a repeater sattelite if they cannot fix Galileo in the next 6 months. CNN ended the segment by saying that "informed space experts" estimate that there is about a 1 in 10 chance of Galileo being fixed. But JPL added that if there is a fix, they _will_ find it. -john- -- ============================================================================= John A. Weeks III (612) 942-6969 john@newave.mn.org NeWave Communications ...uunet!tcnet!wd0gol!newave!john ------------------------------ Date: 3 May 91 22:00:31 GMT From: udecc.engr.udayton.edu!blackbird.afit.af.mil!tkelso@tut.cis.ohio-state.edu (TS Kelso) Subject: NASA Prediction Bulletins, Part 2 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 of these elements are uploaded weekly to sci.space. This week's elements 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. - Current NASA Prediction Bulletins #842a - COBE 1 20322U 89 89 A 91122.00680233 .00000678 00000-0 45869-3 0 3259 2 20322 99.0131 134.3140 0008925 196.3522 163.7252 14.03079496 74192 Kvant-2 1 20335U 89 93 A 91122.53643640 .00034926 00000-0 33845-3 0 6838 2 20335 51.6049 158.9472 0008536 171.1242 189.0344 15.65987949 81670 GPS BII-05 1 20361U 89097 A 91102.25648239 .00000000 00000-0 00000 0 0 01370 2 20361 055.0029 128.5219 0062924 061.9649 298.7036 02.00558350000341 SPOT 2 1 20436U 90 5 A 91122.71787401 .00000514 00000-0 25972-3 0 5746 2 20436 98.7351 197.5694 0000767 143.3036 216.8190 14.19996406 66098 UO-14 1 20437U 90 5 B 91122.22417975 .00001104 00000-0 45135-3 0 3780 2 20437 98.6640 201.9252 0010286 302.6115 57.3972 14.29099943 66428 UO-15 1 20438U 90 5 C 91120.70758949 .00000756 00000-0 31636-3 0 2750 2 20438 98.6705 200.3398 0009822 309.3715 50.6558 14.28685420 66199 PACSAT 1 20439U 90 5 D 91122.47208996 .00001024 00000-0 41897-3 0 2770 2 20439 98.6731 202.4976 0010865 309.3328 50.6876 14.29185843 66461 DO-17 1 20440U 90 5 E 91121.96499687 .00001157 00000-0 47064-3 0 2784 2 20440 98.6740 202.0372 0011782 310.4248 49.5835 14.29267592 66398 WO-18 1 20441U 90 5 F 91122.14653391 .00000930 00000-0 38140-3 0 2772 2 20441 98.6706 202.2637 0011394 308.1072 51.9081 14.29315082 66427 LO-19 1 20442U 90 5 G 91121.98343586 .00000926 00000-0 37882-3 0 2784 2 20442 98.6714 202.1563 0011916 309.2827 50.7277 14.29390739 66408 GPS BII-06 1 20452U 90008 A 91104.64828609 -.00000008 00000-0 00000 0 0 01549 2 20452 054.3878 243.7085 0043963 051.6051 308.8222 02.00557816008908 MOS-1B 1 20478U 90 13 A 91121.22796045 .00000159 00000-0 14370-3 0 5789 2 20478 99.1569 194.5147 0000155 85.3541 274.7645 13.94847209 62471 DEBUT 1 20479U 90 13 B 91122.45970617 .00000113 00000-0 30151-3 0 2237 2 20479 99.0236 113.3081 0541716 45.2167 319.1703 12.83194721 57698 FO-20 1 20480U 90 13 C 91105.45830526 .00000074 00000-0 21687-3 0 1862 2 20480 99.0224 99.5356 0541596 83.6151 282.6307 12.83176352 55515 MOS-1B R/B 1 20491U 90 13 D 91121.45951404 .00000523 00000-0 10314-2 0 2809 2 20491 99.0250 125.0195 0470988 5.2591 355.3253 13.02830329 57845 LACE 1 20496U 90 15 A 91122.13615062 .00010556 00000-0 53792-3 0 5380 2 20496 43.0992 4.0277 0019292 205.7800 154.2088 15.16697381 66912 RME 1 20497U 90 15 B 91122.44320470 .00025398 00000-0 47252-3 0 5891 2 20497 43.1054 260.9774 0021769 294.3280 65.5304 15.48128728 68080 Nadezhda 2 1 20508U 90 17 A 91121.12145937 .00000138 00000-0 13616-3 0 3242 2 20508 82.9549 185.4732 0044035 179.6431 180.4780 13.73308716 58641 OKEAN 2 1 20510U 90 18 A 91121.88129220 .00003327 00000-0 49130-3 0 5375 2 20510 82.5413 163.9447 0018854 324.8989 35.0961 14.74903502 63015 INTELSAT-6 1 20523U 90 21 A 91 91.55355126 -.00000992 00000-0 -77177-4 0 4503 2 20523 28.3374 172.8868 0015279 28.8362 331.3048 15.03589821 57875 GPS BII-07 1 20533U 91105.05693773 -.00000034 10000-3 0 2207 2 20533 55.1887 3.7570 0034776 95.6026 264.8348 2.00567925 7677 PegSat 1 20546U 90 28 A 91122.23199000 .00015012 00000-0 76835-3 0 5194 2 20546 94.1410 25.8187 0128737 259.0654 99.6060 15.09583806 58039 HST 1 20580U 91122.07137749 .00006445 00000-0 67935-3 0 4715 2 20580 28.4699 17.1523 0005104 200.3140 159.7237 14.87520086 55447 Glonass 44 1 20619U 90 45 A 91122.26157899 -.00000018 00000-0 99999-4 0 4857 2 20619 65.0657 27.9969 0021740 216.5081 143.3911 2.13103060 7429 Glonass 45 1 20620U 90 45 B 91121.91017376 -.00000018 00000-0 99999-4 0 5351 2 20620 65.0650 28.0105 0008515 29.5278 330.5553 2.13102961 7424 Glonass 46 1 20621U 90 45 C 91121.96908141 -.00000018 00000-0 99999-4 0 4333 2 20621 65.0781 28.0183 0011932 207.3938 152.5772 2.13102446 7425 Kristall 1 20635U 90 48 A 91122.53642409 .00062099 00000-0 59570-3 0 4838 2 20635 51.6056 158.9490 0008329 167.8557 192.2250 15.65988052 52555 ROSAT 1 20638U 90 49 A 91123.10901244 .00004471 00000-0 36876-3 0 2901 2 20638 53.0118 68.5080 0011906 205.7298 154.3049 15.00784693 50268 Meteor 2-19 1 20670U 90 57 A 91121.78331928 .00000507 00000-0 44578-3 0 2234 2 20670 82.5471 35.7573 0017070 109.0585 251.2405 13.83963660 42580 CRRES 1 20712U 90 65 A 91121.66149409 .00001475 00000-0 18552-2 0 2820 2 20712 17.8934 291.2477 7111703 55.1952 352.6109 2.44303507 6847 GPS BII-08 1 20724U 90 68 A 91102.41087082 .00000016 00000-0 99999-4 0 1214 2 20724 54.6934 184.3098 0096141 124.9826 235.9927 2.00564358 5043 Feng Yun1-2 1 20788U 90 81 A 91122.37577184 .00000008 00000-0 16949-4 0 1847 2 20788 98.9458 156.8504 0014546 304.0638 55.9151 14.01133746 33791 Meteor 2-20 1 20826U 90 86 A 91121.63624373 .00000363 00000-0 32087-3 0 1749 2 20826 82.5292 334.9235 0014404 16.0817 344.0784 13.83342130 29776 GPS BII-09 1 20830U 90 88 A 91 92.47526014 .00000012 00000-0 99999-4 0 890 2 20830 54.9154 127.0815 0074356 115.5295 245.3041 2.00568450 3923 GPS BII-10 1 20959U 90103 A 91103.35280476 .00000016 00000-0 99999-4 0 736 2 20959 54.9080 185.9076 0046990 214.5192 145.2306 2.00567745 2730 DMSP B5D2-5 1 20978U 90105 A 91123.03819642 .00001298 00000-0 49369-3 0 1828 2 20978 98.8406 159.0696 0079697 272.0998 87.1080 14.30930535 21790 Soyuz TM-11 1 20981U 90107 A 91122.47262212 .00036030 00000-0 34929-3 0 1835 2 20981 51.6070 159.2722 0008587 165.5018 194.6498 15.65961522 23652 Glonass 47 1 21006U 90110 A 91122.47728231 .00000020 00000-0 99999-4 0 1835 2 21006 64.8367 147.5727 0061873 187.7963 172.1587 2.13102075 3111 Glonass 48 1 21007U 90110 B 91122.18493822 .00000020 00000-0 99999-4 0 1851 2 21007 64.8574 147.6118 0039085 182.1014 177.9348 2.13100226 3106 Glonass 49 1 21008U 90110 C 91122.06776927 .00000020 00000-0 99999-4 0 1837 2 21008 64.8429 147.6010 0011231 289.0956 70.8168 2.13099764 3107 INFORMTR-1 1 21087U 91122.45492809 .00000283 00000-0 28809-3 0 729 2 21087 82.9387 267.5573 0036064 28.2952 332.0147 13.74379605 12748 Cosmos 2123 1 21089U 91 7 A 91121.52227182 .00000210 00000-0 21213-3 0 738 2 21089 82.9237 138.7019 0030979 50.5396 309.8488 13.73893673 11730 MOP-2 1 21140U 91 15 B 91 97.28897163 .00000004 00000-0 99999-4 0 325 2 21140 1.1414 297.0546 0002168 14.4682 344.4133 1.00295186 156 Nadezhda 3 1 21152U 91 19 A 91121.41362157 .00000006 00000-0 00000 0 0 800 2 21152 82.9327 93.5448 0042891 151.6321 208.7191 13.73336139 6812 Progress M7 1 21188U 91 20 A 91122.47259181 .00106749 00000-0 10147-2 0 1336 2 21188 51.6070 159.2738 0008224 165.3972 194.5801 15.65985888 6899 1991 014E 1 21201U 91 14 E 91119.37035756 .00006000 00000-0 19702-2 0 749 2 21201 47.5626 232.3482 7236184 15.9003 357.9326 2.33259843 1422 Cosmos 2138 1 21203U 91 23 A 91122.97314688 .00682608 28087-4 35610-3 0 1555 2 21203 67.1310 249.8016 0100725 105.9409 255.4333 16.08929773 6026 Almaz-1 1 21213U 91 24 A 91122.63391191 .00144377 97657-5 27733-3 0 983 2 21213 72.7010 19.9317 0010536 237.7160 122.2828 16.00279087 5133 Cosmos 2139 1 21216U 91 25 A 91122.02723584 -.00000018 00000-0 99999-4 0 861 2 21216 64.8175 28.1275 0007005 233.9156 126.0536 2.13102958 601 Cosmos 2140 1 21217U 91 25 B 91122.08586663 -.00000018 00000-0 99999-4 0 852 2 21217 64.8072 28.1452 0009809 249.1188 110.8101 2.13102315 609 Cosmos 2141 1 21218U 91 25 C 91122.20346085 -.00000018 00000-0 99999-4 0 893 2 21218 64.8000 28.1294 0008403 315.4466 44.5379 2.13103276 607 1991 025D 1 21219U 91 25 D 91 94.74774096 .28808147 38238-4 15492-3 0 35 2 21219 64.8184 28.1760 0013333 280.2281 79.9690 16.54538856 54 1991 025E 1 21220U 91 25 E 91122.13954498 .00001945 00000-0 17623-2 0 892 2 21220 64.8648 18.7957 5801257 348.1042 2.6530 4.23437980 1076 1991 025F 1 21221U 91 25 F 91120.20162624 -.00000018 00000-0 99999-4 0 744 2 21221 64.8060 28.2111 0003913 286.4928 73.4923 2.13169390 512 Anik E-2 1 21222U 91 26 A 91121.64790488 -.00000186 00000-0 99999-4 0 847 2 21222 0.0848 47.7398 0009590 126.0632 186.2228 1.00542544 185 1991 026B 1 21223U 91 26 B 91118.58207429 .00000688 00000-0 30482-2 0 751 2 21223 4.2494 348.1896 7217993 198.1456 107.8256 2.25957841 536 GRO 1 21225U 91 27 B 91121.20759331 .00015857 00000-0 38969-3 0 798 2 21225 28.4649 61.6775 0009755 199.3915 160.6323 15.39039812 3951 1991 025G 1 21226U 91 25 G 91120.72223917 .00001512 00000-0 13696-2 0 836 2 21226 64.7484 19.3000 5801462 348.2576 2.6383 4.23435528 1012 ASC-2 1 21227U 91 28 A 91120.67569369 -.00000086 00000-0 99999-4 0 836 2 21227 0.2520 218.1490 0002543 276.4752 225.4015 1.00272267 137 1991 028B 1 21228U 91 28 B 91122.52754129 .00000280 00000-0 99999-4 0 827 2 21228 24.0055 298.5757 1173776 223.7541 126.3853 12.46378228 2443 1991 028C 1 21229U 91 28 C 91116.88130025 -.00000054 00000-0 99999-4 0 777 2 21229 22.5125 17.2008 6907626 185.1622 159.6065 2.19693911 311 Cosmos 2142 1 21230U 91 29 A 91121.82296169 .00000138 00000-0 14006-3 0 757 2 21230 82.9573 331.1226 0036780 242.2558 117.4865 13.72304239 2125 1991 029B 1 21231U 91 29 B 91123.10783641 .00003016 00000-0 31594-2 0 788 2 21231 82.9528 330.1211 0031690 225.6648 134.1789 13.74612749 2300 Meteor 3-4 1 21232U 91 30 A 91121.80821025 .00000005 00000-0 00000 0 0 123 2 21232 82.5448 257.2558 0016933 166.9752 193.1873 13.15981761 1011 1991 030B 1 21233U 91 30 B 91122.64340480 .00000634 00000-0 16511-2 0 88 2 21233 82.5441 256.6646 0016856 164.5151 195.6497 13.16158956 1110 1991 030C 1 21234U 91 30 C 91122.64340453 .00000619 00000-0 16103-2 0 89 2 21234 82.5456 256.6649 0017306 165.1905 194.9747 13.16158856 1136 STS 39 1 21242U 91 31 A 91123.10640046 .00236800 34986-4 25599-3 0 146 2 21242 56.9932 267.5322 0011102 272.5797 239.4370 16.09400028 747 -- Dr TS Kelso Assistant Professor of Space Operations tkelso@blackbird.afit.af.mil Air Force Institute of Technology ------------------------------ Date: 3 May 91 23:54:05 GMT From: swrinde!elroy.jpl.nasa.gov!jarthur!jhuyghe@ucsd.edu (Julien David Huyghe) Subject: Re: Tethers In article <21625@crg5.UUCP> szabo@crg5.UUCP (Nick Szabo) writes: > >Paul Dietz and I have worked on his proposal for tapping the large kinetic energy of Jupiter's inner moons, via Jupiter's strong magnetic field, using a similar scheme. The energy available, and readily extractable, is at minimum millions of megawatts for over a thousand years. I have also proposed a scientific "astronomy flashlight" mission that could take >advantage of the magnetic flux with a small probe in the near term. Sounds interesting! Have you done any papers or articles on the subject? Could you give references? Thanks in advance... -- Julien David Huyghe, Pomona College '93 / Please let me dream Internet: pomona|spears|jarthur@claremont.edu / Let me scream GEnie: J.HUYGHE, CompuServe: 71760,3577 / Let me die --Mylene Farmer ------------------------------ Date: 4 May 91 01:21:23 GMT From: drwho@athena.mit.edu (Jonathan Monsarrat) Subject: Holding Down an Atmosphere (was Re: Teraforming Venus?) Ganymede has about 1/7 of the Earth's gravity even though it's big. This is because it is mostly ice. If a lot of water vapor or atmosphere of some sort were created by a. melting a lot of ice b. pummeling it with ice comets does anyone know how long it would take for the atmosphere to bleed off? How much gravity does a body need to have an atmosphere anyway? And if it were a satellite (Ganymede), would its focus (Jupiter) steal the atmosphere away anyway? Much appreciation for any insight into this. Thank you! -Jon Monsarrat jonmon@cadence.com drwho@athena.mit.edu ------------------------------ End of SPACE Digest V13 #496 *******************