hello all. this is the video of Vo52 sat reception on a Genesis G59 SDR using a 10m to 2m transverter tentec 1210 http://www.youtube.com/watch?v=MAIh2bOs34I
73 de SW1JGW Dimitrios Jimmy Pallis http://sw1jgw.50webs.com/ > From: [email protected] > Subject: AMSAT-BB Digest, Vol 6, Issue 93 > To: [email protected] > Date: Fri, 11 Feb 2011 12:00:05 -0800 > > Send AMSAT-BB mailing list submissions to > [email protected] > > To subscribe or unsubscribe via the World Wide Web, visit > http://amsat.org/mailman/listinfo/amsat-bb > or, via email, send a message with subject or body 'help' to > [email protected] > > You can reach the person managing the list at > [email protected] > > When replying, please edit your Subject line so it is more specific > than "Re: Contents of AMSAT-BB digest..." > > > Today's Topics: > > 1. ARISSat Signal ? (Mani VU2WMY) > 2. Heard ARISSAT-1 on two passes (Andy MacAllister) > 3. ARISSat-1 copied (Greg D.) > 4. Re: ARISSat-1 copied ([email protected]) > 5. audio excerpts of 03:11 UTC ARISSat-1 pass on ISS > ([email protected]) > 6. Re: ARISSat-1 - Dumb Question (Rocky Jones) > 7. RE;....2401MHZ Beacon query (Charlie -K3VDB-) > > > ---------------------------------------------------------------------- > > Message: 1 > Date: Fri, 11 Feb 2011 09:31:17 +0530 > From: Mani VU2WMY <[email protected]> > Subject: [amsat-bb] ARISSat Signal ? > To: [email protected], AMSAT-INDIA <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset=UTF-8; DelSp="Yes"; format="flowed" > > Just heard a CW signals on 145.919 during the 03:50 low angle pass > (Max ele 4 deg). Could some one confirm, is it from ARISSat under test > on board the ISS ? > > 73 de > > Mani, VU2WMY > Secretary & Station-In-Charge > Upagrah Amateur Radio Club VU2URC > ISRO Satellite Centre > HAL Airport Road, Bangalore-560 017. > Phone:(O)91-80-25082054/2598/2192 > Mobile: 91-80-98803 41456 > E-mail ID: [email protected] > [email protected] > [email protected] > > ------------------------------------------------------------------------------ > Confidentiality Notice: This e-mail message, including any attachments, is for > the sole use of the intended recipient(s) and may contain confidential and > privileged information. Any unauthorized review, use, disclosure or > distribution is prohibited. If you are not the intended recipient, please > contact the sender by reply e-mail and destroy all copies of the original > message. > ------------------------------------------------------------------------------ > > > > ------------------------------ > > Message: 2 > Date: Fri, 11 Feb 2011 00:03:43 -0600 > From: "Andy MacAllister" <[email protected]> > Subject: [amsat-bb] Heard ARISSAT-1 on two passes > To: "'AMSAT BBS'" <[email protected]> > Message-ID: <8DB9B3DF83F647FFADB4CD66B5FCC02B@w5acmathlon> > Content-Type: text/plain; format=flowed; charset="iso-8859-1"; > reply-type=original > > Allen N5AFV had just finished a talk on ARISSAT-1 for the Brazos Valley > Amateur Radio Club here in SW Houston... Bruce KK5DO, Charlie K5ENG, and a > few others headed outside to listen for the ARISSAT-1 tests from the ISS. We > heard it on a 7-deg el pass using his TH-D72 HT. On the next pass, I was > listening from home, but just wasn't quick enough to catch the SSTV signal > in it's entirity. However, you can see what I did manage to capture with my > TH-D7A and VC-H1 at 0450Z at http://www.w5acm.net/110211_004014.jpg > > Looking forward to R-28 on Feb 16th! > > 73 de Andy W5ACM > > > > > > ------------------------------ > > Message: 3 > Date: Fri, 11 Feb 2011 00:13:44 -0800 > From: "Greg D." <[email protected]> > Subject: [amsat-bb] ARISSat-1 copied > To: <[email protected]> > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > Nice pass just now, started 07:53z (about local midnight). Off for a few > minutes, then I heard the voice transmission, then off, then SSTV. Full > quieting with my 8 element beam and a preamp. The SSTV picture was not so > great, as it was near the end of the pass, and I had disabled my Az tracking > before the antenna would have needed to swing past 0-degrees. I usually get > better results being not quite aimed right, than losing 60 seconds of > tracking while it swings clear around. > > How long will it be in this mode? I didn't get much chance to tune around the > passband to see if anything else was going on. > > Greg KO6TH > > > > ------------------------------ > > Message: 4 > Date: Fri, 11 Feb 2011 04:36:39 EST > From: [email protected] > Subject: [amsat-bb] Re: ARISSat-1 copied > To: [email protected], [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="US-ASCII" > > > In a message dated 11/02/2011 08:27:41 GMT Standard Time, > [email protected] writes: > > > How long will it be in this mode? I didn't get much chance to tune around > the passband to see if anything else was going on. > > Greg KO6TH > > > > Hi > > Nice to catch a little of the CW at 00.23UTC last night here in London. > > I wonder if the battery will get a top up before the 16th. 200mA @28V for > 8 hours = 161kJ and counting. > > David > > > ------------------------------ > > Message: 5 > Date: Thu, 10 Feb 2011 23:24:10 -0500 > From: <[email protected]> > Subject: [amsat-bb] audio excerpts of 03:11 UTC ARISSat-1 pass on ISS > To: <[email protected]> > Message-ID: <9DA3CFFB2B4845C188DFA45A51AC204C@DHJ> > Content-Type: text/plain; charset="iso-8859-1" > > Here is some excerpts from the 03:11 UTC ARISSat-1 on ISS pass over Orlando, > FL. I deleted stretches of noise between the audio I heard as to make this > short. First is a little of the voice telemetry, then the ID and message, > finally a faint SSTV frame that starts just as it goes over the horizon. > This was using a TH-D7AG with an Arrow antenna and no preamp. > > Dave, AA4KN > > ------------------------------ > > Message: 6 > Date: Thu, 10 Feb 2011 22:52:42 -0600 > From: Rocky Jones <[email protected]> > Subject: [amsat-bb] Re: ARISSat-1 - Dumb Question > To: <[email protected]>, <[email protected]> > Cc: [email protected], Amsat, BB <[email protected]>, > [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="iso-8859-1" > > > Hello All.. A basic rule of the "internets" is in the discussion of orbits > when Hohmann transfers are brought up the easy discussion is over > (grin)...but everyone below has the essential points. When a velocity vector > modification is made in an orbit the "area " rule means that the changes to > the orbit are increasingly felt as the antipodal or 180 degree point is > approached. IN addition of course other factors act on the orbit and as Bob > described it in the cares of ARISSAT the main one would be "drag" as the > probe has a lot less mass then the space station...this will quickly remove > the satellite from the orbital altitude of the station...although Bob is > correct in a perfect world the satellite and ISS would meet again one orbit > later. There is a great deal of difference in "prox ops" and long term orbit > modifications. > > This is not initiative. The closest thing to it is in basic pilot training > teaching the notion of a "turn around a point". Here the "change" vector is > wind and it takes a bit of instruction to recognize that any changes made > "now" do not really manifest themselves until about 90 degrees later. > > There are several "strange" things that celestial mechanics drive. It took > sometime to recognize that when the shuttle and station dock, the center of > gravity of both vehicles combine to move the CG well outside the combined > stack. (think of how the shuttle VRS say how a Progress docks as well as the > relative mass of the vehicles). This eventually drove changes in the docking > and latching procedure. > > Robert G. Oler WB5MZO Life Member AMSAT/ARRL and NARA and soon to be 5N > something. > > > > > > > CC: [email protected]; [email protected]; [email protected]; > > [email protected]; [email protected] > > From: [email protected] > > Subject: Re: [amsat-bb] Re: ARISSat-1 - Dumb Question > > Date: Thu, 10 Feb 2011 17:51:12 -0700 > > To: [email protected] > > > > This time I'll actually type something before hitting send;) > > > > The two burn maneuver is essentially a Hohmann transfer maneuver. The point > > of the first burn becomes the new apogee or perigee (depending on the > > direction of the burn). The burn will raise or lower the antipodal point > > from where the burn occurred. At that point a second burn in the same > > direction will bring the point of the first burn to the new level. > > > > But you all probably already knew that:) > > > > If you want to play around with this try this: > > > > http://orbit.medphys.ucl.ac.uk/home.php > > > > > > Sent from my iPod > > Rick Tejera > > Editor, SACnews > > Saguaro Astronomy Club > > www.saguaroastro.org > > K7TEJ > > > > On Feb 10, 2011, at 17:17, "Bob Bruninga" <[email protected]> wrote: > > > > >> a retrograde maneuver will remove ARISSsat from > > >> the proximity of ISS very very quickly. > > > > > > It is interesting that any such one-thrust (arm throw) maneuver will then > > > intersect the ISS exactly one orbit later. In theory that is. But the > > > difference in drag at that low altitude will usually be enough to have a > > > safe miss distance on the next and subsequent orbits. > > > > > > I think that is why most space maneuvers require two burns. One to start a > > > new orbit (but it will still intersect the original orbit on every orbit. > > > Then a second burn somewhere else in the orbit to get rid of that > > > intersecting point? > > > > > > Bob, WB4APR > > > > > >>>>> ... Clint. When ARISSAT is released it will stay in the "Plane" of > > > ISS > > >>> orbit...they will toss it retrograde meaning in the opposite direction > > > of > > >>> the velocity vector and with its slightly lower velocity the orbit will > > >>> start to decrease...this is done so that very quickly the orbits will > > > stop > > >>> being "prox ops" reasonably fast. > > >>> > > >>> If so, then I believe as the orbit altitude is reduced, the apparent > > >>> velocity increases.....(??) which will cause ARISsat-1 to 'move ahead' > > > of the > > >>> ISS over a few hours > > >>> > > >>> But didn't we say the velocity would be less than the ISS due to the > > > method > > >>> of deploying it against the velocity vector ? > > >>> > > >> > > >> Interesting puzzler, eh? From what I have read in the past, I think this > > > their logic. > > >> > > >> What they are trying to do is to separate the orbits of the ISS and > > > ARISSat as quickly as possible, to avoid the potential for a collision. > > > Consider the options: > > >> > > >> 1. Throw it sideways to the ISS orbit. The result is that twice per > > > orbit the two spacecraft's paths will cross, side to side. Bad idea. > > >> > > >> 2. Throw it ahead of the ISS (faster orbit speed). This will raise the > > > orbit, slightly, and also make it a bit elliptical (up and down). The > > > higher orbit makes the satellite go behind the ISS, but the elliptical > > > shape > > > also means that the orbits will cross every orbit (but out of phase, so > > > they > > > won't be at the same place when they do). But, then as the ARISSat orbit > > > decays, they will get closer and closer, potentially getting back to the > > > same place. Not good, either. > > >> > > >> 3. Throw it behind the ISS (slower orbit). As you note, this will lower > > > the orbit (and make it a bit elliptical), and initially the apogee of the > > > orbit will intersect that of the ISS. Being in a lower orbit, ARISSat will > > > move ahead of the ISS, and over time, as the ARISSat orbit decays, the two > > > will diverge even farther. So, this is the safest. > > >> > > >> At least, I think that's the logic. If not, pass me some of that tuna... > > >> > > >> Greg KO6TH > > > > > > _______________________________________________ > > > Sent via [email protected]. Opinions expressed are those of the author. > > > Not an AMSAT-NA member? Join now to support the amateur satellite program! > > > Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb > > > ------------------------------ > > Message: 7 > Date: Thu, 10 Feb 2011 14:09:47 -0500 > From: Charlie -K3VDB- <[email protected]> > Subject: [amsat-bb] RE;....2401MHZ Beacon query > To: [email protected], [email protected] > Cc: [email protected], [email protected], [email protected], > [email protected], [email protected] > Message-ID: <[email protected]> > Content-Type: text/plain; charset="us-ascii"; format=flowed > > Hello AMSAT;.......Regarding my earlier message copied below > asking for reports > of the usage of our 2401MHZ beacon. > > We have received sufficient positive reports to continue to maintain > this 24/7 beacon. > > I would like to thank all that responded with your comments and hope > to hear from you > from time to time with signal and TLM reports. > > Charlie K3VDB > > ----------------Quoted Message--------------------------------- > > Hello AMSAT;......I am trying to determine if the W3HMS > beacon on 2401MHZ > is being use by the Satellite community located in South Central PA. > We have not received any reports for some time and will not continue > to support it if not needed. > > It Is located in FM19qv (S/E of York PA.). > > For those who are not familiar with it, it has been on 24/7 > for >3 years and located at 1000ft on a 130ft tower. Its output is 1W > to a RHCP Lindenblad Ant. Its CW Message contains 5 Telemetering (TLM) > channels and about 15 sec of solid carrier > (then it repeat). A spread sheet TLM decoder is available on request. The > beacon is useful for Receive system testing and propagation analyzing etc. > > The 2401MHZ beacon is co-located with a 1296MHZ beacon and a 5760MHZ beacon. > > More info is available at [email protected] > > Please Let me know if any of these beacons are useful to you!!! > > Charlie > > > > ------------------------------ > > _______________________________________________ > Sent via [email protected]. Opinions expressed are those of the author. > Not an AMSAT member? Join now to support the amateur satellite program! > http://amsat.org/mailman/listinfo/amsat-bb > > > End of AMSAT-BB Digest, Vol 6, Issue 93 > *************************************** _______________________________________________ Sent via [email protected]. Opinions expressed are those of the author. 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