Date: Tue, 12 Apr 94 04:30:35 PDT From: Ham-Space Mailing List and Newsgroup Errors-To: Ham-Space-Errors@UCSD.Edu Reply-To: Ham-Space@UCSD.Edu Precedence: Bulk Subject: Ham-Space Digest V94 #88 To: Ham-Space Ham-Space Digest Tue, 12 Apr 94 Volume 94 : Issue 88 Today's Topics: * SpaceNews 11-Apr-94 * 2 Line ElSets Building Sat antennas (2 msgs) Eprom 27C512 with access time of 120 ns Meteosat/APT Trans. Sked Oscar Antennas ?? SAREX Keps 4/11/94 at 8:00 UTC Two-Line Orbital Element Set: Space Shuttle Send Replies or notes for publication to: Send subscription requests to: Problems you can't solve otherwise to brian@ucsd.edu. Archives of past issues of the Ham-Space Digest are available (by FTP only) from UCSD.Edu in directory "mailarchives/ham-space". We trust that readers are intelligent enough to realize that all text herein consists of personal comments and does not represent the official policies or positions of any party. Your mileage may vary. So there. ---------------------------------------------------------------------- Date: Mon, 11 Apr 1994 10:05:43 MDT From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!europa.eng.gtefsd.com!MathWorks.Com!yeshua.marcam.com!zip.eecs.umich.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.UCSD Subject: * SpaceNews 11-Apr-94 * To: ham-space@ucsd.edu SB NEWS @ AMSAT $SPC0411 * SpaceNews 11-Apr-94 * BID: $SPC0411 ========= SpaceNews ========= MONDAY APRIL 11, 1994 SpaceNews originates at KD2BD in Wall Township, New Jersey, USA. It is published every week and is made available for unlimited distribution. * NEW AO-13 SCHEDULE * ====================== Magnetorquing from attitude 180/0 to 230/-5 commenced on Apr 04 [Fri] 1810 UTC, orbit 4446/224, and continued for 8 perigees. The new schedule commenced on orbit 4452 MA 145 Apr 07 [Thu] 1120 UTC. *** AO-13 TRANSPONDER SCHEDULE *** 1994 Apr 07-Jul 11 Mode-B : MA 0 to MA 170 | Mode-BS : MA 170 to MA 218 | Mode-S : MA 218 to MA 220 |<- S beacon only Mode-S : MA 220 to MA 230 |<- S transponder; B trsp. is OFF Mode-BS : MA 230 to MA 250 | Alon/Alat 230/-5 Mode-B : MA 250 to MA 256 | Omnis : MA 250 to MA 120 | Move to attitude 180/0, Jul 11 NEW ATTITUDE - Note: The mean attitude for the period 1994 Apr 07-Jul 11 will be ALON/ALAT 230/0. This is an Alon 10 degrees "better" than originally proposed. It is achieved at the expense of a 10 degree "worse" Sun angle, which will will now reach 40 degrees (77% illumination) May 30-Jul 11. During that period the Mode-B transponder *might* have to be OFF from MA 250-80 to conserve battery power. Please don't rely on gossip and rumour! Continuous up to date information about AO-13 operations is always available on the beacons, 145.812 MHz or 2400.664 MHz in CW, RTTY and 400 bps PSK. These bulletins are also posted to Internet, ANS, Packet, PacSats etc, and many international newsletters. A 400 bps PSK decoder is available from G3RUH and several DSP products; display software P3C.EXE etc from many AMSAT groups. The active command stations are listed below, and constructive feedback about operations is always welcome. Peter DB2OS @ DB0FAU.#NDS.DEU.EU James G3RUH @ GB7DDX.#22.GBR.EU Graham VK5AGR @ VK5WI.#ADL.#SA.AUS.OC The above may also be reached via Internet (callsign@amsat.org) and KO-23. Please remember to state clearly a return address. Notes prepared on behalf of, and in total cooperation with the above by: James Miller G3RUH @ GB7DDX.#22.GBR.EU 1994 Apr 04 [Mon] 0600 UTC * AMSAT NET VIA SATELLITE * =========================== Bruce Paige, KB5ZRV, is the AMSAT Area Coordinator in Houston, Texas. Bruce runs a local AMSAT net that meets on the 147.100 MHz repeater every Tuesday evening at 10:00 PM local Central Time. The net is rebroadcast over the Galaxy 3 satellite, Transponder 17 on a 5.8 MHz subcarrier. This net is then received live and retransmitted by repeater operators in Toronto, Canada, Anchorage, Alaska (3 repeaters), New England States (6 repeaters), Ontario, CA, Lawton, OK, Indianapolis, IN, Fargo, ND. It has also been heard in Hawaii and other states. The net has a telephone number for those that would like to ask questions of the net or check in. There are beginners segments that lasts 3-5 minutes, and explain how satellite novices can work various satellites, describes different types of station equipment necessary to work satellites, and other topics that beginners find useful in getting started in satellite operations. SAREX operating techniques have also been covered. This net re-broadcast is free for the taking by those with TVRO ground stations. The people who run the net are having a great time and have found many people are listening in that do not have AMSAT nets in their local areas. Any comments can be directed to Bruce via the Internet at kb5zrv@amsat.org. * FO-20 SCHEDULE * ================== The FO-20 command station announced that FO-20 will be placed in Mode JA (Analog transponder mode) during Field Day 1994 (25-Jun-94 18:00 UTC through 26-Jun-94 18:00 UTC). The current operating schedule is as follows: Analog mode: 06-Apr-94 06:45 -to- 13-Apr-94 07:10 UTC 20-Apr-94 07:35 -to- 27-Apr-94 07:55 UTC 11-May-94 06:54 -to- 18-May-94 07:20 UTC Digital mode: Unless otherwise noted above. [Info via Kazu Sakamoto, JJ1WTK] * FUJI AWARD INFORMATION * ========================== Kazu Sakamoto, JJ1WTK, reports that a "Fuji" award is available to users of the FO-20 satellite. Applicants should have confirmed CW or SSB contacts with 10 different amateur stations through the FO-20 Amateur Satellite. A fee of 8 IRCs or US $4 will be charged per award. An additional 2 IRCs will be charged for air mail delivery regardless of the number of the awards claimed. If QSL cards are submitted, sufficient funds for return postage will also be required. Correspondence should be sent to: Japan Amateur Radio League -- Award Desk 1-14-2 Sugamo, Toshima, Tokyo 170, Japan * SpaceNews BBS UPDATE * ======================== The SpaceNews packet radio BBS sponsored by Mario, KD6ILO, reported in last week's issue of SpaceNews has changed frequency. It can now be found operating on 145.050 MHz. The latest issue of SpaceNews, as well as other AMSAT and satellite-related news and information can be found on this BBS. The BBS is also linked to the UoSAT-OSCAR-22 satellite through the N7RSN SatGate also located in Tacoma, WA. * THANKS! * =========== Thanks to all those who sent messages of appreciation to SpaceNews, especially: K2UVG VE3OZL W4AT ZR5JRS VE7AHX * FEEDBACK/INPUT WELCOMED * =========================== Mail to SpaceNews should be directed to the editor (John, KD2BD) via any of the following paths: FAX : 1-908-747-7107 PACKET : KD2BD @ N2KZH.NJ.USA.NA INTERNET : kd2bd@ka2qhd.ocpt.ccur.com -or- kd2bd@amsat.org MAIL : John A. Magliacane, KD2BD Department of Engineering and Technology Advanced Technology Center Brookdale Community College Lincroft, New Jersey 07738 U.S.A. <<=- SpaceNews: The first amateur newsletter read in space! -=>> /EX -- John A. Magliacane, KD2BD * /\/\ * Voice : 1-908-224-2948 Advanced Technology Center |/\/\/\| Packet : KD2BD @ N2KZH.NJ.USA.NA Brookdale Community College |\/\/\/| Internet: kd2bd@ka2qhd.ocpt.ccur.com Lincroft, NJ 07738 * \/\/ * Morse : -.- -.. ..--- -... -.. ------------------------------ Date: 11 Apr 94 19:56:56 GMT From: hp-cv!hp-pcd!hpcvsnz!charlier@hplabs.hp.com Subject: 2 Line ElSets To: ham-space@ucsd.edu leeannmyk@aol.COM wrote: : Hello, My name is Mike Johnson. I am looking for a source for : USSPACECMD/NORAD type 2 line element sets for a varity of vehicles (primarily : 16609). : Any help in finding this (these) source(s) would be greatly appreciated. : I can also be contacted at johnsonm@Rush.aps.rl.af.mil No need to look any further. They are posted on a regular basis to this very notes group, with titles like: ORBS$098.2L.AMSAT In fact here's the Mir data from a recent set: Mir 1 16609U 86017 A 94090.25081547 0.00008348 11343-3 0 5496 2 16609 51.6462 216.9197 0015558 91.3363 268.9434 15.58441517493803 -- Charlie Panek KX7L Hewlett Packard Company charlier@lsid.hp.com Lake Stevens Instrument Division Everett, Washington ------------------------------ Date: 11 Apr 1994 14:40:09 GMT From: ihnp4.ucsd.edu!dog.ee.lbl.gov!agate!usenet.ins.cwru.edu!eff!news.kei.com!newsstand.cit.cornell.edu!newsstand.cit.cornell.edu!usenet@network.ucsd.edu Subject: Building Sat antennas To: ham-space@ucsd.edu In article Joe Mack, mack@ncifcrf.gov writes: >Get the ARRL &/or RSGB antenna handbooks. THe calculations for a helix are >trivial. They are wideband and non-critical in dimensions, unlike a yagi. > Yeah, that is a very nice feature of them. Mine kept falling over tripod and all when I first put it up (hey, I'm an EE, not an ME :-) and all the dings and bends didn't seem to faze it. As for the calculations - my suggestion would be to put the formulas into a spreadsheet so you can diddle the values and see what you come up with. That is what I did and it was very handy in finally converging on a working design. > However people don;t build them at 2m very often - they are more >often used at UHF . I don't really know why but here are some guesses > > A 2m helix is large and hard to support (rods out from the center >pole to the helix are long). That is one important reason - they get fairly unweildy. After my success with my 420-450 helix, I looked into doing one for 2 but gave it up because of the size. I think the other big reason is it's not as efficient an antenna for the boom length. My 14 turn helix is 10 foot long and has about 15 db of gain. You can get the same gain smaller and lighter in a yagi arrangement - but they are much trickier to adjust and have much smaller usable bandwidth. > > It isn't 50 ohms. Itsa bout 140ohms and there are tricks to make >it 50ohms but these are narrow band (still wide band by ham band standards) >and a little tricky to get going. Go with the radial feed method (instead of coming into the center to feed, you squish the last turn into half the space, fatten the conductor to about 5 times the regular size (I used copper flashing) and feed it off the center where the turn comes down to the ground plane. On mine it easily handles the band from 420 to 450. I use the same antenna for Oscar, ATV, SSB and FM. > > Maybe you can make more money by selling a yagi than a helix. > > It would beinteresting to find out the real reason, but most people >if they want a fair bit of gain at 2m and 432 and want circular polarisation >they use crossed beams 1/4lambda apart I think that is mostly the size vs gain issues. Helix'es are simple, cheap, forgiving, fun and work well. But they aren't the smallest antenna on the block. 73 de Kevin, WB2EMS "Coffee, that elixir which makes life possible before noon. " ------------------------------ Date: Mon, 11 Apr 1994 15:40:30 GMT From: ihnp4.ucsd.edu!swrinde!emory!wa4mei!ke4zv!gary@network.ucsd.edu Subject: Building Sat antennas To: ham-space@ucsd.edu In article JAY@medicine.dmed.iupui.edu (Jay Sissom) writes: >I am new to satelite communications. (This is just a warning!) > >I would like to build a 2m & a 70cm beam for use with satelites. Does anyone >know of an article in QST or some other plan for such antennas? >From what I understand, a normal 2m or 70cm beam antenna would work, but a >circular polorization would be much better. I have no idea how one would >build a circular polorized antenna. Circular polarized crossed yagis are fairly simple to build. There are a couple of ways to get circular polarization with them. The way KLM does it is to space one of the antennas 1/4-wave further up the boom than the other and then combine the two antennas with a simple matching harness (two 1/4-wave 75 ohm cables to a Tee fitting). Or you can take the Cushcraft path and mount the two antennas' elements at the same points on the boom and combine them as above, but with an additional 1/4-wave length of 50 ohm cable in one leg to get the required 90 degree phase shift. There are other forms of circularly polarized antennas. A couple are the helix (both axial and quadrafilar) and the Lindenblad. You can also use disc or loop yagis with crossed dipole driven elements. These are more common at S band. A nice simple antenna for S band can be constructed of all thread rod for the boom, fender washers for parasitic elements, and a bunch of jam nuts to hold everything in place. The crossed dipole driven elements can be made from a piece of printed circuit board (duroid) with the driven elements and their phasing and matching harnesses etched onto the board and held in place with nylon jam nuts. The whole thing will fit in a piece of PVC or fiberglass tubing for weatherproofing, or you can just cover the driven elements and reflector with pipe and let the rest hang out in the breeze after a cold galvanize spray. (You could use circuit board for all the elements, but that much duroid board gets expensive.) (You can use a short bolt, a drill, and a file to size the OD of the parasitic element washers. Just put the washer on the bolt with jam nuts, chuck it in the drill, and file to size.) Gary -- Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary 534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary Lawrenceville, GA 30244 | | ------------------------------ Date: Mon, 11 Apr 1994 13:32:59 GMT From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!torn!news.unb.ca!upei.ca!UPEI.CA!seeler@network.ucsd.edu Subject: Eprom 27C512 with access time of 120 ns To: ham-space@ucsd.edu I was wondering if anyone knew of a Canadian or US distributer or supplier for the following two items which are being considered for the Trakbox hardware upgrade: 1. 27C512 Eprom (Dip package) with 120 nanosecond access time. 2. Dallas Semiconductor microprocessor DS80C320 Any suggestions as to names or numbers would be greatly appreciated. 73 de David Seeler, VY2DCS Internet: seeler@upei.ca ------------------------------ Date: Mon, 11 Apr 94 14:10:40 CDT From: ihnp4.ucsd.edu!agate!msuinfo!netnews.upenn.edu!iat.holonet.net!vulcan!n4nr@network.ucsd.edu Subject: Meteosat/APT Trans. Sked To: ham-space@ucsd.edu I am looking for an up to date Meteosat 3 /APT Transmission schedule. Would really appreciate a copy....Thanks! -- Dennis T. Dease internet - n4nr@vulcan.com (or n4nr@amsat.org) Pelham, Alabama, USA packet radio - n4nr@kd4cim.al.usa.na ------------------------------ Date: Mon, 11 Apr 1994 15:42:50 GMT From: ihnp4.ucsd.edu!swrinde!emory!wa4mei!ke4zv!gary@network.ucsd.edu Subject: Oscar Antennas ?? To: ham-space@ucsd.edu In article wb8k@barf80.nshore.org (Dennis jakubisin) writes: >What the latest gossip concerning what good & what isn't on Oscar yagi's >for mode B & J.. KLM, M sqrd etc. Any comments?? The old Cushcraft AOP 1 >pkg I have been using for a few years rally barks, especially in wet >weather. You noticed that too, huh? :-) I use the KLM-22C and the 40CX for my station. Clean patterns, good gain, and they hold up really well. Gary -- Gary Coffman KE4ZV | You make it, | gatech!wa4mei!ke4zv!gary Destructive Testing Systems | we break it. | uunet!rsiatl!ke4zv!gary 534 Shannon Way | Guaranteed! | emory!kd4nc!ke4zv!gary Lawrenceville, GA 30244 | | ------------------------------ Date: Mon, 11 Apr 1994 02:17:31 -0600 From: ihnp4.ucsd.edu!usc!howland.reston.ans.net!news.intercon.com!panix!zip.eecs.umich.edu!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!usenet@network.ucsd.edu Subject: SAREX Keps 4/11/94 at 8:00 UTC To: ham-space@ucsd.edu SB SAREX @ AMSAT $STS-59.010 SAREX Keps Update 4/11 at 8:00 UTC Greenbelt, MD, 4/11/94 at 8:00 UTC The official SAREX element set for this morning will be GSFC-005. This element sent was generated by Ron Parise, WA4SIR, of the Goddard Space Flight Center. Gil Carman, WA5NOM, reports that the predictions using GSFC-005 are closer to the real-time Orbiter state vector than GSFC-007 or JSC-009. STS-59 1 23042U 94020A 94 99.70643805 0.00018312 11043-4 10773-4 0 58 2 23042 56.9974 262.7245 0009489 267.3550 92.6453 16.20229092 67 Satellite: STS-59 Catalog number: 23042 Epoch time: 94099.70643805 (09 APR 94 16:57:16.25 UTC) Element set: GSFC-005 Inclination: 56.9974 deg RA of node: 262.7245 deg Space Shuttle Flight STS-59 Eccentricity: 0.0009489 Keplerian Elements Arg of perigee: 267.3550 deg Mean anomaly: 92.6453 deg Mean motion: 16.20229092 rev/day Semi-major Axis: 6597.0622 Km Decay rate: 0.18E-03 rev/day*2 Apogee Alt: 224.93 Km Epoch rev: 5 Perigee Alt: 212.41 Km NOTE - This element set is based on NORAD element set # 005. The spacecraft has been propagated to the next ascending node, and the orbit number has been adjusted to bring it into agreement with the NASA numbering convention. Submitted by Frank H. Bauer, KA3HDO for the SAREX Working Group /EX ------------------------------ Date: 11 Apr 94 23:36:12 GMT From: agate!howland.reston.ans.net!paladin.american.edu!zombie.ncsc.mil!blackbird.afit.af.mil!tkelso@ucbvax.berkeley.edu Subject: Two-Line Orbital Element Set: Space Shuttle To: ham-space@ucsd.edu The most current orbital elements from the NORAD two-line element sets are carried on the Celestial BBS, (513) *253-9767*, and are updated daily (when possible). 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 BBS may be accessed 24 hours/day at 300, 1200, 2400, 4800, or 9600 bps using 8 data bits, 1 stop bit, no parity. Element sets (also updated daily), shuttle elements, and some documentation and software are also available via anonymous ftp from archive.afit.af.mil (129.92.1.66) in the directory pub/space. STS 59 1 23042U 94020A 94101.25000000 .00017734 11042-4 10466-4 0 118 2 23042 56.9964 255.2840 0011421 290.8126 76.0752 16.20196288 296 -- Dr TS Kelso Assistant Professor of Space Operations tkelso@afit.af.mil Air Force Institute of Technology ------------------------------ Date: Mon, 11 Apr 1994 14:15:30 GMT From: telesoft!garym@uunet.uu.net To: ham-space@ucsd.edu References , , Reply-To : elements-request@alsys.com Subject : STS-59 Element Set (94101.310) STS-59 1 23042U 94020A 94101.31051560 +.00017734 11042-4 10466-4 0 112 2 23042 56.9964 254.9922 0011420 290.9416 69.0451 16.20198854 317 Satellite: STS-59 Catalog number: 23042 Epoch time: 94101.31051560 (11 APR 94 07:27:08.55 UTC) Element set: GSFC-011 Inclination: 56.9964 deg RA of node: 254.9922 deg Space Shuttle Flight STS-59 Eccentricity: 0.0011420 Keplerian Elements Arg of perigee: 290.9416 deg Mean anomaly: 69.0451 deg Mean motion: 16.20198854 rev/day Semi-major Axis: 6597.1443 Km Decay rate: 0.18E-03 rev/day*2 Apogee Alt: 226.29 Km Epoch rev: 31 Perigee Alt: 211.22 Km (for Shuttle Elements subscription info, email: listserv@alsys.com) -- Gary Morris Internet: elements-request@alsys.com KK6YB Packet: KK6YB @ N0ARY.#NOCAL.CA.USA.NA San Diego, CA, USA Phone: +1 619-457-2700 x128 ------------------------------ Date: 11 Apr 94 16:30:36 GMT From: telesoft!garym@uunet.uu.net To: ham-space@ucsd.edu References , , Reply-To : elements-request@alsys.com Subject : STS-59 Element Set (94101.619) STS-59 1 23042U 94020A 94101.61900344 +.00018288 11044-4 10712-4 0 120 2 23042 56.9946 253.5022 0010718 289.2110 70.7819 16.20252631 360 Satellite: STS-59 Catalog number: 23042 Epoch time: 94101.61900344 (11 APR 94 14:51:21.90 UTC) Element set: GSFC-012 Inclination: 56.9946 deg RA of node: 253.5022 deg Space Shuttle Flight STS-59 Eccentricity: 0.0010718 Keplerian Elements Arg of perigee: 289.2110 deg Mean anomaly: 70.7819 deg Mean motion: 16.20252631 rev/day Semi-major Axis: 6596.9983 Km Decay rate: 0.18E-03 rev/day*2 Apogee Alt: 225.68 Km Epoch rev: 36 Perigee Alt: 211.54 Km (for Shuttle Elements subscription info, email: listserv@alsys.com) -- Gary Morris Internet: elements-request@alsys.com KK6YB Packet: KK6YB @ N0ARY.#NOCAL.CA.USA.NA San Diego, CA, USA Phone: +1 619-457-2700 x128 ------------------------------ End of Ham-Space Digest V94 #88 ******************************