Date: Tue, 10 May 94 04:30:24 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 #119 To: Ham-Space Ham-Space Digest Tue, 10 May 94 Volume 94 : Issue 119 Today's Topics: AO-27 help? APT-Satellites: Report MAY 07, 1994 FCC REGS? Is there a Pacsat/Internet Gateway?? Mac Satellite Tracking Program Please Help Me Re: Re APT Wheather TEST What are MET-3/4, MET-3/5 and MET-2/21? 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: 9 May 94 23:53:37 GMT From: sdd.hp.com!hpscit.sc.hp.com!icon!greg@hplabs.hpl.hp.com Subject: AO-27 help? To: ham-space@ucsd.edu Hi, folks, Can someone walk through a typical pass of AO-27 for me? I am having a lot of trouble with this one, more than I would have expected from the comments I've heard. Information that would be helpful: downlink frequency at the start, middle, end of pass uplink freq, how to find yourself approximate signal strength expectations ("weaker than AO-21, but you don't need a pre-amp", or some such statement) uplink power antenna requirements I have about 30 watts into a 5 element beam for the uplink, and an 8 element Quagi for the downlink. Cable runs are ~50 feet of RG-8 (I know this isn't ideal, but I should hear *something*). Thanks, Greg KD6KGW p.s. The same info for FO-20 would be OK too, but I expect AO-27 is easier. I haven't been able to hit AO-21 yet either, but at least I can hear it clearly. ------------------------------ Date: Mon, 9 May 1994 06:07:36 -0600 From: ihnp4.ucsd.edu!swrinde!gatech!newsxfer.itd.umich.edu!nntp.cs.ubc.ca!alberta!ve6mgs!path@network.ucsd.edu Subject: APT-Satellites: Report MAY 07, 1994 To: ham-space@ucsd.edu Observed at station 50.7 NLat, 7.1 ELon, MAY 07, 1994 NOAA-9: APT 137.62 On NOAA-10: APT 137.50 On NOAA-11: APT 137.62 On NOAA-12: APT 137.50 On Meteor 2-21: APT 137.40 ON again (weak) Meteor 3-5: APT 137.85 On Meteor 2-21 is back again, but weak as always (antenna- problem). Meteor 3-5 is at the terminator, illumination- conditions become bad. No IR-ransmissions during evening ascending passes. +------------------------------------------+ |Peter Henne (peter.henne@gmd.de) | | (henne@gmd.de) | |German Nat.Research Center.f.Comp.Science | |D-53754 St.AUGUSTIN, Germany | +------------------------------------------+ ------------------------------ Date: 9 May 94 04:07:00 GMT From: amd!amdahl!netcomsv!netcomsv!toadhall!ronald.hobbs@decwrl.dec.com Subject: FCC REGS? To: ham-space@ucsd.edu *CROSSPOST ALERT* I have seen Ramsey Electronic's Ads for transmitters for "Dorm" stations,etc. I would like to put a station on the air that doesn't violate any FCC Regs or entail great licensening expense (or power). Does anybody know anything? I am a ham radio operator, don't want to jeopardize my ticket or run a pirate station. I have the "book" here but who knows chapter and verse?--the FCC lines are always busy. Thanks for your space and time. 73 de Ronald. --- ~ SLMR 2.1a ~ Backup not found: (A)bort (R)etry (P)anic ------------------------------ Date: 10 May 94 06:55:59 GMT From: agate!howland.reston.ans.net!pipex!demon!kgreen.demon.co.uk!Jeff@ucbvax.berkeley.edu Subject: Is there a Pacsat/Internet Gateway?? To: ham-space@ucsd.edu In article: <5k7s8Rl.dentarthur@delphi.com> Jim Corenman writes: > > This is probably a dumb question, but I've been unable to find the answer > amongst the packet or satellite faq files, or anywhere esle I've looked. > Frequencies and modes I found, but is it possible, on a routine basis, > to pass messages between the packet birds and internet e-mail? > It is possible, and it is even implemented by both VITA and SatelLife on the non-amateur birds, but I think that the regulatory problems have kept anyone from doing it on the amateur packet satellites. Jeff Ward ------------------------------ Date: 7 May 94 18:35:02 GMT From: agate!howland.reston.ans.net!europa.eng.gtefsd.com!news.ans.net!newstf01.cr1.aol.com!search01.news.aol.com!not-for-mail@ucbvax.berkeley.edu Subject: Mac Satellite Tracking Program To: ham-space@ucsd.edu In article <2qdll3$icm@post.its.mcw.edu>, mmjjmm@post.its.mcw.edu (Michael Malloy) writes: *** Satellite tracking *** Tracks one satellite across a world map as it moves, displays the instantaneous position of several satellites, or generates tables of all satellites visible from a certain location at a given time. Also calculates beam headings, Maidenhead grid locations, and MUFs. Shareware. Available via anonymous FTP from sumex-aim.stanford.edu (/info-mac/app). Or send a formatted 800K Macintosh disk with stamped, self-addressed disk mailer to Mike Pflueger, WD8KPZ, 6207 W. Beverly Lane, Glendale, AZ 85306. Tracks up to 21 satellites simultaneously, either in simulation or real-time mode. Text screen displays ground-track coordinates, range, mean anomaly, visibility (azimuth and elevation) and Doppler shift frequency information for all satellites being tracked. Graphical screen portrays the satellite ground tracks superimposed on a world map. Polar plot displays graphically the precise location of each visible satellite above the observer's horizon. Developed by the Geodetic Research Laboratory of the University of New Brunswick. Available from Richard B. Langley, R.R. 12, Fredericton, N.B. E3B 6H7, Canada (Internet: lang@unb.ca). A demo version of MacSat may be ftp'ed from directory PUB.CANSPACE on unbmvs1.csd.unb.ca. System 7 Calculates look angles to selected satellites, plots current satellite positions on a world map, and displays the visible passage of a satellite against background stars (either within the program itself or via a data file that can be read into the Voyager astronomy program). Please note that one version requires an FPU to operate! BEK Developers, P.O. Box 47114, St. Petersburg, FL 33743. (Bill Bard, CompuServe: 75366,2557) (Note: This replaces BEK's previous MacSat program, which was not related to the program of the same name from UNB.) Macintosh version of N4HY's QuikTrak program. Requires Microsoft BASIC. AMSAT, P.O. Box 27, Washington, DC 20044. Macintosh conversion of W3IWI program. Requires Microsoft BASIC. Send formatted 800K Macintosh disk with stamped, self-addressed disk mailer to Earl Skelton, N3ES, 6311 29th Place NW, Washington, DC 20015. Or send self-addressed stamped envelope for source listing. Uses world maps and tables to indicate rising and setting schedules, current locations, mutual visibility opportunities, and footprints. Includes Mercator, polar, and great-circle displays. Optional antenna control. MacTrak Software, P.O. Box 1590, Port Orchard, WA 98366. Author is on AOL and can be reached as adamod@aol.com via the internet. Misc. Internet FTP sites for Amateur Radio Macintosh software joker.optics.rochester.edu (/ham ) sumex-aim.stanford.edu (/info-mac/app) mac.archive.umich.edu various locations uxc.cso.uiuc.edu (/pub/ham-radio) ucsd.edu (/hamradio) many different subdirectories (/hamradio/packet/tcp/incoming) newest files temp holding area (/hamradio/packet/tcpip/pa2aga) NET/Mac & IM/Mac area ftp.apple.com (/pub/ham-radio) akutaktak.andrew.cmu.edu (/aw0g) softkiss-mac nic.switch.ch (/software/mac/ham-radio) world.std.com (/pub/hamradio/mac) This should help. 73 for now.... c u on the shortwaves Terry Stader - KA8SCP America Online Ham Radio Club Host Internet: tstader@aol.com (files <28K) or p00489@psilink.com ( files >28K) KA8SCP@WA1PHY.#EMA.MA.USA.NOAM ka8scp@ka8scp.ampr.org [44.56.4.82] Mac ka8scp-1@ka8scp-1.ampr.org [44.56.4.120] DOS Clone (they're BOTH pc's!) ------------------------------ Date: 10 May 94 00:19:13 GMT From: sdd.hp.com!hpscit.sc.hp.com!icon!greg@hplabs.hpl.hp.com Subject: Please Help Me To: ham-space@ucsd.edu Michael Malloy (mmjjmm@post.its.mcw.edu) wrote: : I am interested in getting started in satellite communications and would : like to get more information. If you have any files or information that : you could forward I would be greatful. Check out QST. A few (less than 12) months ago they had an article about the "Easy Sats" (RS-10) which talked about the requirements for getting on the air through the birds. My first setup was fairly modest, but was still good enough to make a number of contacts. Assuming you want to start with Phone on RS-10, you'll need: An uplink transmitter - 2 meters SSB, 10+ watts, J-pole or ground plane ant. A downlink receiver - I used my Radio Shack DX-440 shortwave radio. Turn on the BFO to receive the SSB signal. Dipole or long wire antenna. A computer with a satellite tracking program & a current set of elements. This will get you into RS-10. Other satellites are harder (i.e. more power, bigger antennas). Good luck! Greg KD6KGW ------------------------------ Date: 9 May 1994 12:37:18 GMT From: ihnp4.ucsd.edu!agate!howland.reston.ans.net!xlink.net!nntp.gmd.de!NewsWatcher!user@network.ucsd.edu Subject: Re: Re APT Wheather To: ham-space@ucsd.edu In article , boyer@rd.eng.bbc.co.uk (John Boyer) wrote: > Herb Dieben (ag381@FreeNet.Carleton.CA) wrote: > > > : What would be the 'best case' resolution of NOAA's either or VIS / IR > : or both.Another way of asking is what number of pixels do their sensors > : use?Also while we are at it, what is 'best case' gray scale resolution? > : Let mme e know if you can.Or perhaps direct me to a reliable source for > : this info. > : Thank you, reader! > > > Best case hoorizontal resolution is 4800 pixels per line. The grey scale > resolution depends on your convertor. > > > john b > john.boyer@rd.eng.bbc.co.uk Oh, I am in doubt....if you talk about APT. Subcarrier is 2400 Hz, AM-modulated max 1600 Hz, 2 Lines/sec containing a vis-Line and a Th.IR-line. So we can rely on just not very much more than 400 dots per line. This gives a pixel- resolution of 7.2 km x 3.6 km (scan-dir x orbit-direction). Resolution of greyscale is not better than 1:200 (if you reach that, normally your converter will achieve 1:64 or so): APT is an analog format. HRPT-Resolution is 2048 Pix/lin, 10 Bit depth per channel, a frame has 5 channels, 6 frames per second. Resolution is just below 1x1 km. 10 Bit depth: HRPT is a digital format, you will see the full resolution or nothing. Regards Peter +------------------------------------------+ |Peter Henne (peter.henne@gmd.de) | | (henne@gmd.de) | |German Nat.Research Center.f.Comp.Science | |D-53754 St.AUGUSTIN, Germany | +------------------------------------------+ ------------------------------ Date: 9 May 1994 12:04:34 GMT From: ihnp4.ucsd.edu!swrinde!cs.utexas.edu!howland.reston.ans.net!pipex!sunic!EU.net!Germany.EU.net!nntp.gmd.de!NewsWatcher!user@network.ucsd.edu Subject: TEST To: ham-space@ucsd.edu Test, please ignore +------------------------------------------+ |Peter Henne (peter.henne@gmd.de) | | (henne@gmd.de) | |German Nat.Research Center.f.Comp.Science | |D-53754 St.AUGUSTIN, Germany | +------------------------------------------+ ------------------------------ Date: 9 May 1994 12:19:24 GMT From: ihnp4.ucsd.edu!swrinde!gatech!howland.reston.ans.net!pipex!warwick!uknet!EU.net!Germany.EU.net!nntp.gmd.de!NewsWatcher!user@network.ucsd.edu Subject: What are MET-3/4, MET-3/5 and MET-2/21? To: ham-space@ucsd.edu In article <2qktnt$9js@usenet.INS.CWRU.Edu>, dt650@cleveland.Freenet.Edu (David J. Mullenix) wrote: > > I notice that the March/April issue of the "AMSAT Journal" > has orbital elements for three satellites named MET-3/4, MET-3/5 > and MET-2/21, NORAD Ids 21232, 21655 and 22782 respectively. > What are these satellites? Do they have any accessable > amateur gear on board? If so, what are the frequencies and > modulation? > > Thanks, > Dave, N9LTD Meteor 3-4 and Meteor 3-5 are Weather-Satellites lauched by the former USSR. Meteor 2-21 is one of the older Meteor-2 - Class- Weather-Satellites, lauched end of 1993 by Russia. Met 3-5 and Met 2-21 transmit real-time-images using APT (Automatc Picture Transmission) on 137.85 MHz (3-5) and 137.40 MHz (2-21). They use FM-Modulation (15 kHz deviation) to transmit an AM-Subcarrier of 2400 Hz modulated by the image, 2 lines per second, max 1600 Hz image-data. No "classical" amateur-gear (transponder/repeater etc). Hope that helps a little Peter +------------------------------------------+ |Peter Henne (peter.henne@gmd.de) | | (henne@gmd.de) | |German Nat.Research Center.f.Comp.Science | |D-53754 St.AUGUSTIN, Germany | +------------------------------------------+ ------------------------------ End of Ham-Space Digest V94 #119 ******************************