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 ; Mon, 7 Jan 1991 01:54:41 -0500 (EST) Message-ID: Precedence: junk Reply-To: space+@Andrew.CMU.EDU From: space-request+@Andrew.CMU.EDU To: space+@Andrew.CMU.EDU Date: Mon, 7 Jan 1991 01:54:07 -0500 (EST) Subject: SPACE Digest V13 #016 SPACE Digest Volume 13 : Issue 16 Today's Topics: Re: Interstellar Light Sails Re: Space News from Flight Int. for Dec90 Re: SPACE Digest V12 #703 NASA Prediction Bulletins, Part 1 Re: Interstellar travel sub: fusion Orion variant 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: 31 Dec 90 16:30:50 GMT From: eplrx7!leipold@louie.udel.edu (Walt Leipold) Subject: Re: Interstellar Light Sails Andrew Peter Anselmo writes: >Anybody given any thought in this newsgroup about Robert L. Fowards' >interstellar light sail ships?... > ...The basic premise is to use a ring of lasers in >orbit around Mercury (powered from the sun) to boost a light sail. A low-budget version of this concept (although not for manned starflight) is Forward's 'Starwisp' interstellar probe. It builds on somebody's (Dyson's?) observation that a photon sail can have fractional-wavelength holes without significant loss in performance. Starwisp is a maser-driven wire-mesh sail, ~1 km in diameter and ~1kg in mass, with no payload except for a simple processing element (<1 microgram) at each mesh intersection. The processing elements pull power from the maser beam, perform speckle interferometry to image the target system, and modulate the reflection of the maser beam to send results back to earth. The maser power requirements are modest (considering the scope of the mission), and gratification is almost instantaneous: close-up images of the Alpha Centauri system can be returned within 15-20 years of mission start. And since the beam only has to be on while launching the probe and during target encounter (to power the probe), one bank of masers can support many simultaneous Starwisp missions. A *beautiful* preliminary design study for this little gem showed up as Appendix D of an "Advanced Propulsion Concepts" study Forward did for AFRPL back in '83. A lot of Forward's book "Future Magic" was based on this Air Force-funded work. -------------------------------------------------------------------------- "When dealing with the insane, Walt Leipold it is best to pretend to be sane." (leipolw%esvax@dupont.com) -------------------------------------------------------------------------- -- The UUCP Mailer ------------------------------ Date: 31 Dec 90 22:12:08 GMT From: swrinde!cs.utexas.edu!news-server.csri.toronto.edu!utzoo!henry@ucsd.edu (Henry Spencer) Subject: Re: Space News from Flight Int. for Dec90 In article mcdaniel@adi.com (Tim McDaniel) writes: > RSFSR's Ministry of Communications and Information Technology will > pay R100 million ($176) ... > >I heard that the Soviet Union's inflation was bad, but THAT bad? >568000 rubles per dollar? 8-) While *that* was obviously a typo, there is no single satisfactory exchange rate for the ruble, since it is not a freely-traded currency. The black market rate, which apparently is considered the most realistic rate, is R20-40/US$, which would make this system cost US$5M or less. (Before anyone protests that this surely must be subsidized, take a look at Soviet personnel salaries in light of that exchange rate. This is a third-world country we're talking about, folks.) -- "The average pointer, statistically, |Henry Spencer at U of Toronto Zoology points somewhere in X." -Hugh Redelmeier| henry@zoo.toronto.edu utzoo!henry ------------------------------ Date: Mon, 31 Dec 90 12:52:06 MEZ From: UNF313@DBNRHRZ1.BITNET Subject: Re: SPACE Digest V12 #703 unsubsribe ------------------------------ Date: 31 Dec 90 18:23:27 GMT From: ncis.tis.llnl.gov!blackbird!tkelso@lll-winken.llnl.gov (TS Kelso) Subject: NASA Prediction Bulletins, Part 1 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 #790a - Alouette 1 1 00424U 62B-A 1 90352.80331432 .00000264 00000-0 30536-3 0 3775 2 00424 80.4619 104.0608 0022994 156.1277 204.0945 13.67430378407922 ATS 3 1 03029U 67111 A 90352.10687973 -.00000074 00000-0 99999-4 0 4851 2 03029 13.4163 19.5648 0021501 268.8319 90.9266 1.00272537 84633 Cosmos 398 1 04966U 71 16 A 90357.53802128 .00086164 18419-4 43300-3 0 3071 2 04966 51.5081 112.8873 2144624 152.4405 220.8862 11.33891052612898 Starlette 1 07646U 75010 A 90350.85556824 .00000026 00000-0 68097-4 0 1800 2 07646 49.8187 157.7075 0206179 74.7736 287.5852 13.82148254801041 LAGEOS 1 08820U 76039 A 90353.19958803 .00000005 00000-0 00000 0 0 1778 2 08820 109.8636 58.5065 0044495 199.5087 160.4038 6.38664335 85758 GOES 2 1 10061U 77048 A 90354.09103361 -.00000258 00000-0 99999-4 0 5348 2 10061 8.5015 61.4358 0003544 17.6121 342.3228 1.00261232 50871 IUE 1 10637U 78012 A 90350.23726702 -.00000184 00000-0 99999-4 0 1839 2 10637 32.5925 116.0102 1420818 358.2053 1.1859 1.00250513 8285 GPS-0001 1 10684U 78020 A 90356.41229131 .00000005 00000-0 99999-4 0 5835 2 10684 63.8160 83.7367 0124075 198.3462 161.2551 2.00555068 79627 GPS-0002 1 10893U 78 47 A 90355.40583625 -.00000023 00000-0 00000 0 0 2899 2 10893 64.3035 324.6123 0168721 23.8131 336.9339 2.00538295 92425 GOES 3 1 10953U 78062 A 90353.15052083 .00000109 00000-0 99999-4 0 209 2 10953 7.4179 64.2373 0006320 119.2497 144.6936 1.00246039 6775 SeaSat 1 1 10967U 78064 A 90357.95672123 .00001067 00000-0 40855-3 0 4429 2 10967 108.0220 351.9371 0002883 265.6230 94.4514 14.36095689653699 GPS-0003 1 11054U 78093 A 90350.18223514 -.00000022 00000-0 00000 0 0 3348 2 11054 63.8278 320.9631 0060351 119.7723 240.8197 2.00570328 89337 Nimbus 7 1 11080U 78098 A 90346.22308104 .00000123 00000-0 14122-3 0 7250 2 11080 99.1791 246.9712 0008969 332.1845 27.8873 13.83481953612657 GPS-0004 1 11141U 78112 A 90354.78339774 .00000005 00000-0 00000 0 0 924 2 11141 63.8246 83.6911 0058399 312.8208 46.7233 2.00550526 88124 GPS-0005 1 11690U 80 11 A 90356.41937636 .00000006 00000-0 00000 0 0 816 2 11690 64.2853 85.8206 0120505 202.3335 157.1700 2.00553569 94017 GPS-0006 1 11783U 80 32 A 90356.72211843 -.00000022 00000-0 99999-4 0 3093 2 11783 63.6208 320.2818 0150505 59.7102 301.7741 2.00561619 78100 GOES 5 1 12472U 81049 A 90351.30939582 .00000068 00000-0 99999-4 0 214 2 12472 3.9307 73.4350 0001352 233.8209 125.7972 1.00213780 34068 SME 1 12887U 81100 A 90358.10292474 .00091816 00000-0 62140-3 0 217 2 12887 97.6052 59.5209 0002045 10.3843 349.7252 15.74752209510883 Salyut 7 1 13138U 82 33 A 90357.98223531 .00160769 00000-0 42341-3 0 6903 2 13138 51.5949 47.5655 0003249 4.2971 355.7096 15.93811651494769 Cosmos 1383 1 13301U 82 66 A 90353.97354722 .00000115 00000-0 12442-3 0 6797 2 13301 82.9315 164.6154 0028569 11.5223 348.6581 13.67867005423073 LandSat 4 1 13367U 82 72 A 90357.72196157 -.00003235 00000-0 -71372-3 0 6222 2 13367 98.1401 56.2757 0002341 267.5956 92.5219 14.57121274448904 IRAS 1 13777U 83 4 A 90354.53724543 .00000111 00000-0 10121-3 0 8826 2 13777 99.0126 188.3736 0012385 229.7150 130.3008 13.98850273 72993 Cosmos 1447 1 13916U 83 21 A 90351.69625389 .00000139 00000-0 13591-3 0 7735 2 13916 82.9445 236.3824 0038864 350.9205 9.1236 13.74085289387876 TDRS 1 1 13969U 83 26 B 90357.39696611 .00000128 00000-0 99999-4 0 2142 2 13969 4.9396 64.0025 0003631 211.9799 147.8383 1.00274741 1246 GOES 6 1 14050U 83 41 A 90353.89999998 .00000120 00000-0 99999-4 0 3408 2 14050 2.7120 75.5070 0001040 337.1900 223.2830 1.00269141 00 OSCAR 10 1 14129U 83 58 B 90356.51445136 -.00000108 00000-0 00000 0 0 6304 2 14129 25.9183 168.6928 5967533 202.9623 113.0649 2.05882900 28614 GPS-0008 1 14189U 83 72 A 90350.67128587 .00000004 00000-0 99999-4 0 8806 2 14189 63.4541 82.1513 0145136 222.5675 136.3128 2.00569341 54426 LandSat 5 1 14780U 84 21 A 90357.06590878 -.00000100 00000-0 -17175-4 0 4670 2 14780 98.2628 54.2946 0001520 153.6388 206.4909 14.57084623362224 UoSat 2 1 14781U 84 21 B 90357.05354572 .00001638 00000-0 30685-3 0 8937 2 14781 97.9263 43.2358 0013161 12.9680 347.1688 14.65999999363630 GPS-0009 1 15039U 84 59 A 90357.82345292 .00000003 00000-0 00000 0 0 1403 2 15039 63.2087 81.0551 0026319 225.4666 134.3568 2.00567052 47848 Cosmos 1574 1 15055U 84 62 A 90352.30799074 .00000149 00000-0 14824-3 0 126 2 15055 82.9560 286.5700 0027140 167.5217 192.6615 13.73397766325348 GPS-0010 1 15271U 84 97 A 90357.26823367 -.00000022 00000-0 00000 0 0 9843 2 15271 63.1189 319.7294 0110822 329.3539 30.0069 2.00562381 44945 Cosmos 1602 1 15331U 84105 A 90356.55122930 .00002517 00000-0 33610-3 0 4458 2 15331 82.5371 186.2183 0024659 74.5421 285.8436 14.79022367335928 NOAA 9 1 15427U 84123 A 90357.72697834 .00000253 00000-0 15726-3 0 6864 2 15427 99.1713 2.0358 0014903 193.9215 166.1553 14.12760353310740 Cosmos 1686 1 16095U 85 86 A 90357.04161998 .00190569 00000-0 50718-3 0 8678 2 16095 51.5922 52.5399 0002608 26.9907 332.8308 15.93538293494618 GPS-0011 1 16129U 85 93 A 90357.48654129 .00000005 00000-0 00000 0 0 6954 2 16129 63.9514 82.1783 0125547 148.0315 212.7815 2.00564221 38159 Mir 1 16609U 86 17 A 90357.55106530 .00026595 00000-0 31354-3 0 1586 2 16609 51.6108 96.7798 0024949 38.9943 321.2910 15.60791931277674 SPOT 1 1 16613U 86 19 A 90356.69652384 .00000316 00000-0 16644-3 0 2028 2 16613 98.7166 68.5226 0001264 37.6358 322.4959 14.20022406 90688 Cosmos 1766 1 16881U 86 55 A 90358.10014142 .00003852 00000-0 52156-3 0 2584 2 16881 82.5128 243.6045 0022795 85.9023 274.4699 14.78584270237209 EGP 1 16908U 86 61 A 90350.39529066 -.00000063 00000-0 -17230-3 0 3285 2 16908 50.0115 55.8411 0011175 299.5346 60.4374 12.44390206197546 NOAA 10 1 16969U 86 73 A 90352.26332426 .00000547 00000-0 25562-3 0 5313 2 16969 98.5835 15.9585 0014428 93.9700 266.3130 14.23831739220805 MOS-1 1 17527U 87 18 A 90354.21069280 .00000447 00000-0 35802-3 0 7281 2 17527 99.0930 64.2086 0000702 56.1504 303.9724 13.94883474195194 GOES 7 1 17561U 87 22 A 90357.04514896 -.00000045 00000-0 99999-4 0 6974 2 17561 0.0280 147.9170 0001801 294.5965 277.5034 1.00271410 7462 Kvant-1 1 17845U 87 30 A 90356.91073079 .00056288 00000-0 65387-3 0 4213 2 17845 51.6090 100.0016 0026092 33.9200 326.0471 15.60771100212301 DMSP B5D2-3 1 18123U 87 53 A 90355.26747951 .00000172 00000-0 99999-4 0 8067 2 18123 98.8088 183.3629 0014118 206.7708 153.2733 14.14260150180844 RS-10/11 1 18129U 87 54 A 90354.91882127 .00000180 00000-0 18611-3 0 4662 2 18129 82.9243 190.5624 0011124 327.3477 32.6984 13.72131538175054 Meteor 2-16 1 18312U 87 68 A 90353.44524949 .00000219 00000-0 18868-3 0 5885 2 18312 82.5551 143.4683 0013684 92.4604 267.8122 13.83708636168603 Meteor 2-17 1 18820U 88 5 A 90346.64529578 .00000180 00000-0 15126-3 0 4372 2 18820 82.5437 208.5845 0015938 179.5016 180.6164 13.84402040144873 DMSP B5D2-4 1 18822U 88 6 A 90355.28532047 .00000509 00000-0 24882-3 0 7490 2 18822 98.6176 230.1873 0007566 89.6446 270.5599 14.21677219149400 Glonass 34 1 19163U 88 43 A 90353.50364996 .00000020 00000-0 99999-4 0 1112 2 19163 64.9152 152.9288 0007260 180.3389 179.6492 2.13102441 20098 Glonass 36 1 19165U 88 43 C 90354.02989892 .00000020 00000-0 00000 0 0 1165 2 19165 64.9012 152.9157 0003533 351.6121 8.3593 2.13102756 20107 AO-13 1 19216U 88 51 B 90350.40377437 -.00000209 00000-0 99999-4 0 2267 2 19216 56.8563 120.5684 7087146 242.6692 30.6150 2.09704934 19221 OKEAN 1 1 19274U 88 56 A 90355.06171995 .00000764 00000-0 10303-3 0 178 2 19274 82.5158 345.1391 0020337 229.0741 130.7421 14.77807711132513 Meteor 3-2 1 19336U 88 64 A 90353.87553819 .00000024 00000-0 47898-4 0 6896 2 19336 82.5405 146.0640 0016120 208.2132 151.8117 13.16907133115394 Glonass 39 1 19503U 88 85 C 90354.98816028 -.00000017 00000-0 99999-4 0 270 2 19503 65.4007 32.3068 0006443 200.1350 159.9107 2.13103551 17610 NOAA 11 1 19531U 88 89 A 90355.27668776 .00000640 00000-0 37094-3 0 4387 2 19531 99.0076 304.0223 0012957 115.5476 244.7046 14.11835366115360 TDRS 2 1 19548U 88 91 B 90349.25208042 .00000114 00000-0 99999-4 0 2247 2 19548 0.5730 82.2116 0002296 184.5850 93.2087 1.00276387 2076 Glonass 40 1 19749U 89 1 A 90354.55990069 .00000020 00000-0 99999-4 0 8138 2 19749 64.8570 152.5671 0004734 272.0193 87.9152 2.13102126 15131 Glonass 41 1 19750U 89 1 B 90354.61811681 .00000020 00000-0 99999-4 0 8689 2 19750 64.8800 152.5801 0004943 241.3217 118.6156 2.13102483 15134 GPS BII-01 1 19802U 89 13 A 90350.38029847 .00000017 00000-0 99999-4 0 2281 2 19802 55.0450 190.2251 0052192 161.1231 199.1398 2.00553388 13407 Akebono 1 19822U 89 16 A 90354.88154179 .00021438 00000-0 15558-2 0 8690 2 19822 75.0835 146.7797 4126737 101.7988 306.2525 7.19416243 13180 Meteor 2-18 1 19851U 89 18 A 90353.74857257 .00000191 00000-0 16196-3 0 3895 2 19851 82.5208 80.6270 0013756 199.3401 160.7250 13.84038205 91233 MOP-1 1 19876U 89 20 B 90348.77085838 .00000020 00000-0 99999-4 0 1735 2 19876 0.1537 2.6236 0007013 246.9393 110.4629 1.00275054 2475 TDRS 3 1 19883U 89 21 B 90347.88420365 -.00000235 00000-0 99999-4 0 2238 2 19883 0.5799 80.7080 0003535 181.4568 97.8074 1.00267910 76692 GPS BII-02 1 20061U 89 44 A 90343.73124429 -.00000034 00000-0 99999-4 0 2311 2 20061 54.8388 8.7128 0089319 181.9510 178.0573 2.00566968 11014 Nadezhda 1 1 20103U 89 50 A 90352.89874863 .00000129 00000-0 12632-3 0 2868 2 20103 82.9618 148.8512 0036273 244.6374 115.1027 13.73632524 73072 GPS BII-03 1 20185U 89 64 A 90350.05472694 .00000016 00000-0 99999-4 0 1726 2 20185 54.9002 191.0630 0021894 161.1624 198.9908 2.00573506 9712 GPS BII-04 1 20302U 90304.15728615 -.00000046 -68427+2 0 1700 2 20302 54.5417 311.5245 0033626 314.8971 44.9144 2.00365710 7590 Meteor 3-3 1 20305U 89 86 A 90354.73387197 .00000041 00000-0 94298-4 0 2902 2 20305 82.5537 86.4470 0015457 220.9188 139.0774 13.15869651 55481 -- Dr TS Kelso Assistant Professor of Space Operations tkelso@blackbird.afit.af.mil Air Force Institute of Technology ------------------------------ Date: 31 Dec 90 07:25:12 GMT From: zaphod.mps.ohio-state.edu!julius.cs.uiuc.edu!news.cs.indiana.edu!msi.umn.edu!cs.umn.edu!kksys!orbit!pnet51!schaper@tut.cis.ohio-state.edu (S Schaper) Subject: Re: Interstellar travel sub: fusion Orion variant With that many fusion bombs, who's worring about a few lawyers? :-) :-) :-) ************************************************************************** Zeitgeist Busters! UUCP: {amdahl!bungia, uunet!rosevax, chinet, killer}!orbit!pnet51!schaper ARPA: crash!orbit!pnet51!schaper@nosc.mil INET: schaper@pnet51.cts.com ------------------------------ End of SPACE Digest V13 #016 *******************