February 2011 - AMSAT-BB - mailman.amsat.org

AO-27 schedule
by George Henry 12 Feb '11

12 Feb '11

A new schedule was uploaded to the satellite last Saturday, Feb.5th. Users of the Java schedule lister should make sure they update their data files! The schedule lister is available for download at http://sites.google.com/site/ao27satellitescheduler/ George, KA3HSW

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March/April Launch for Pocket Qub Eagle-2
by Trevor . 12 Feb '11

12 Feb '11

This was expect to launch mid-Feb but the IARU Satellite Frequency Coordination pages are currently quoting a March/April launch, see http://www.amsatuk.me.uk/iaru/finished_detail.php?serialnum=190 73 Trevor M5AKA

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Heard ARISSAT-1 on two passes
by Andy MacAllister 12 Feb '11

12 Feb '11

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

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Re: ARISSat 1 Postponed ?
by Trevor . 12 Feb '11

12 Feb '11

The Russian Federal Space website is quoting April 12 - "In addition, the cosmonauts switched on small satellite Kedr to be activated on April 12, so RF-amateur station all over the world could hear the signals from space. " http://www.federalspace.ru/main.php?id=2&nid=11353 73 Trevor M5AKA --- On Sat, 12/2/11, Trevor . <m5aka(a)yahoo.co.uk> wrote: > From: Trevor . <m5aka(a)yahoo.co.uk> > Subject: Re: [amsat-bb] ARISSat 1 Postponed ? > To: amsat-bb(a)amsat.org, "Keith N4ZQ" <n4zq(a)netzero.com> > Date: Saturday, 12 February, 2011, 9:16 > This NASA page on EVA28, posted Feb > 9, doesn't mention ARISSAT-1 although NASA's earlier > postings on EVA28 had mentioned it as one of the tasks to be > performed. > http://www.nasa.gov/mission_pages/station/expeditions/expedition26/russian_… > > > It says the next Russian space walk will be in July. > > The lack of a mention doesn't necessarily mean anything > although taken in conjunction with the NASA TV reference it > looks like a postponement has occurred. Clearly deployment > of ARISSAT-1 is one of those activities that would be > postponed if additional time were needed to complete other > tasks. > > 73 Trevor M5AKA > > --- On Fri, 11/2/11, Keith N4ZQ <n4zq(a)netzero.com> > wrote: > > During today's Friday 16:00z > > ISS Mission Coverage on NASA TV, they announced that > the > > launch of the Nanosat with space greeting celebrating > the 50 > > years since Yuri Gagarin flight has been postponed > from > > Wednesday space walk. . I ASSUME they are talking > > about ARISSat 1. No explanation was given as to why it > has > > been delayed... Anyone have any other information ? > > > > Keith N4ZQ > > > > > > > > > > > ____________________________________________________________ > > 1 Mom's $279/Day Trick > > Single Mom Makes $4,375/Month. Discover How She Does > It... > > http://thirdpartyoffers.netzero.net/TGL3241/4d55a102ecb9d32c055st02vuc > > > > _______________________________________________ > > Sent via AMSAT-BB(a)amsat.org. > > 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 > > > > > >

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ARISSat 1 Postponed ?
by Keith N4ZQ 12 Feb '11

12 Feb '11

During today's Friday 16:00z ISS Mission Coverage on NASA TV, they announced that the launch of the Nanosat with space greeting celebrating the 50 years since Yuri Gagarin flight has been postponed from Wednesday space walk. . I ASSUME they are talking about ARISSat 1. No explanation was given as to why it has been delayed... Anyone have any other information ? Keith N4ZQ ____________________________________________________________ 1 Mom's $279/Day Trick Single Mom Makes $4,375/Month. Discover How She Does It... http://thirdpartyoffers.netzero.net/TGL3241/4d55a102ecb9d32c055st02vuc

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First copy of ARISSat-1 in South America !
by Roland Zurmely 12 Feb '11

12 Feb '11

I heard ARISSat-1 on 145,950 MHz at 22:25:42 UTC in GH70un Sete Lagoas Brasil, orbit # 70103 of ISS ! Audio here: http://www.qsl.net/py4zbz/satelite/ARISSAT1PY4ZBZ1.wav 73 de Roland.

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SATPC32 Doppler.SQF and TS-2000
by Bobby Lacey 11 Feb '11

11 Feb '11

I'm new to the SSB birds having just purchased a TS-2000. Unfortunately my radio and computer are about 25ft apart which makes tuning the uplink correction for SatPC32 pretty difficult. Would anyone mind sharing their doppler.sqf for the TS-2000 w/ uplink adjustments? Thanks so much for the help & vry 73 Bobby KF4GTA http://www.bobbylacey.com/KF4GTA/stats

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first Vo52 reception with Genesis G59 SDR
by Dimitrios Pallis 11 Feb '11

11 Feb '11

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: amsat-bb-request(a)amsat.org > Subject: AMSAT-BB Digest, Vol 6, Issue 93 > To: amsat-bb(a)amsat.org > Date: Fri, 11 Feb 2011 12:00:05 -0800 > > Send AMSAT-BB mailing list submissions to > amsat-bb(a)amsat.org > > 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 > amsat-bb-request(a)amsat.org > > You can reach the person managing the list at > amsat-bb-owner(a)amsat.org > > 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 (G0MRF(a)aol.com) > 5. audio excerpts of 03:11 UTC ARISSat-1 pass on ISS > (n4csitwo(a)bellsouth.net) > 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 <wmy(a)isac.gov.in> > Subject: [amsat-bb] ARISSat Signal ? > To: amsat-bb(a)amsat.org, AMSAT-INDIA <amsatindia(a)yahoogroups.com> > Message-ID: <20110211040118.BDE6C10CD(a)dnserns.isac.gov.in> > 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: wmy(a)isac.gov.in > vu2wmy_mani(a)yahoo.com > isrohams(a)yahoo.com > > ------------------------------------------------------------------------------ > 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" <w5acm(a)swbell.net> > Subject: [amsat-bb] Heard ARISSAT-1 on two passes > To: "'AMSAT BBS'" <amsat-bb(a)amsat.org> > 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." <ko6th_greg(a)hotmail.com> > Subject: [amsat-bb] ARISSat-1 copied > To: <amsat-bb(a)amsat.org> > Message-ID: <BLU133-W1456EA0AED14E14D53B2ACA9EF0(a)phx.gbl> > 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: G0MRF(a)aol.com > Subject: [amsat-bb] Re: ARISSat-1 copied > To: ko6th_greg(a)hotmail.com, amsat-bb(a)amsat.org > Message-ID: <108486.3f30b72b.3a865d27(a)aol.com> > Content-Type: text/plain; charset="US-ASCII" > > > In a message dated 11/02/2011 08:27:41 GMT Standard Time, > ko6th_greg(a)hotmail.com 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: <n4csitwo(a)bellsouth.net> > Subject: [amsat-bb] audio excerpts of 03:11 UTC ARISSat-1 pass on ISS > To: <amsat-bb(a)amsat.org> > 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 <orbitjet(a)hotmail.com> > Subject: [amsat-bb] Re: ARISSat-1 - Dumb Question > To: <saguaroastro(a)cox.net>, <bruninga(a)usna.edu> > Cc: clintbradford(a)mac.com, Amsat, BB <amsat-bb(a)amsat.org>, > g0mrf(a)aol.com > Message-ID: <COL106-W23F4400BB5D79D0EDF4466D6EF0(a)phx.gbl> > 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: orbitjet(a)hotmail.com; ko6th_greg(a)hotmail.com; g0mrf(a)aol.com; clintbradford(a)mac.com; amsat-bb(a)amsat.org > > From: saguaroastro(a)cox.net > > Subject: Re: [amsat-bb] Re: ARISSat-1 - Dumb Question > > Date: Thu, 10 Feb 2011 17:51:12 -0700 > > To: bruninga(a)usna.edu > > > > 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" <bruninga(a)usna.edu> 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 AMSAT-BB(a)amsat.org. 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- <ceheisler(a)comcast.net> > Subject: [amsat-bb] RE;....2401MHZ Beacon query > To: amsat-BB(a)amsat.org, amsat-dc(a)amsat.org > Cc: w3hms(a)aol.com, ptvjoe(a)pa.net, phil(a)k3tuf.com, > gadboisg(a)dejazzd.com, Fredw3mmv(a)aol.com > Message-ID: <201102111505.p1BF5cRf016294(a)amsat.org> > 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 k3vdb(a)amsat.org > > Please Let me know if any of these beacons are useful to you!!! > > Charlie > > > > ------------------------------ > > _______________________________________________ > Sent via amsat-bb(a)amsat.org. 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 > ***************************************

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Re: ARISSat-1 copied
by G0MRF＠aol.com 11 Feb '11

11 Feb '11

In a message dated 11/02/2011 08:27:41 GMT Standard Time, ko6th_greg(a)hotmail.com 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

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ARISSat-1 copied
by Greg D. 11 Feb '11

11 Feb '11

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

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