December 2010 - AMSAT-BB - mailman.amsat.org

Sacramento and L.A
by Michael Chen 27 Dec '10

27 Dec '10

Hey, guys, I will be in Sacramento today to 29th and then L.A till Jan. 5. It will be great to meet some amsat guys in these areas. Leave me a message or call (317)716-6818. Michael Chen, BD5RV/4 AMSAT-China: http://www.camsat.cn ----------------------------------- Twitter: http://twitter.com/bd5rv Email: michael.bd5rv(a)gmail.com MSN: bd5rv(a)jsdxc.org Skype: michael-bd5rv

1 0

FS: FT736R and accessories
by Rm2642＠aol.com 27 Dec '10

27 Dec '10

Offering my FT736R with accessories first to the satellite community before placing them on eBay. Detailed photos of everything at n6paa.org. Please reply off list. Thanks ron n6paa

1 0

DM31 QSLs to the post office...
by Patrick STODDARD (WD9EWK/VA7EWK) 27 Dec '10

27 Dec '10

Hi! After returning home earlier this afternoon, I printed and wrote out the QSL cards from my DM31 trip to southern Arizona just over a week ago (18 December). All of those cards will go to the post office tomorrow morning. These cards will have a different Arizona license plate on them; I'm not much of an artist, but I can at least mix things up with the large variety of license plates issued by the state of Arizona. :-) I hope everyone had a good Christmas. Happy 2011 to all, and 73! Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/

1 0

AO-51 update 26 Dec 2010 2115utc
by Mark L. Hammond 26 Dec '10

26 Dec '10

Hi All, This afternoon the power management function of AO-51 was turned ON, in anticipation of eclipses in just a few days. You might see the transmitter power levels go UP and DOWN a bit as the battery voltage changes. We'll make some adjustments and tweaks to keep it from going UP and DOWN too often--but it's the way it's gonna work. In a few weeks we expect transmitter(s) to be OFF while in eclipse and ON when in the sun. Expect adjustments and various power management schemes from now until the end of February when we'll again see full sunlight for a brief period (few short months as I recall). We'll do our best to keep you informed via the BBS and the AO-51 webpage. On behalf of the Command Team, Mark L. Hammond [N8MH]

1 0

First Satellite QSO AO-27
by John M. Belstner 26 Dec '10

26 Dec '10

Congratulations to Steve KC4SW on his first Satellite QSO on AO-27 today. Too bad I must also apologize for all the poor operating behavior on the FM Birds. Its not normally this bad. John Belstner W9EN Valley Center, CA DM13le

1 0

Re: O/OREOS TLE errors ?
by PA3GUO 26 Dec '10

26 Dec '10

Hi Ryan Thanks a lot for your detailed reply. Would you be so kind to share that spreadsheet (XLS?) with me ? In the coming days I really need (well, would higly appreciate) to have working TLEs - especially also for Nanosail. Best of course would be if the O/OREOS/Nanasail team could fix this prior to posting them on the web :-) Thanks Henk ---- Ryan Caron <rcaron(a)gmail.com> schreef: > The O/OREOS TLEs consistently do not have valid checksums (last digit of > each line). I submitted a comment about this on their website but I have > not heard back. The correct checksums are 2 & 3, and not the 6 & 5 that > is listed. > > If, by the time you read this, the posted TLEs are not 6 & 5, then the > TLEs have been updated and you'll have to generate new checksums. The > formula is a sum of all numerical characters on the line, including the > line number, treating minus signs as a one and everything else (letters, > +, spaces) as a 0. Then take modulus 10 of the sum (i.e. last digit of > the sum). Look it up on wikipedia for more details. > > I've made a spreadsheet to fix this, but it is still a manual operation > for me (got to write a script at some point). Some programs disregard > the the checksum, which is why HRD & the website still work and your > tracking tool doesn't. Predict/GPredict, my tools of choice, require > valid checksums, making proper TLEs a pet peeve of mine. I don't know > what NOVA's up to. > > In terms of "swarm spread" (i.e. how small delta-V between spacecraft > that shared the same ride, which in this case is just done by compressed > springs, translates into spatial differences), 35 minutes of separation > is pretty high for just 10 days after launch. With all the latest TLEs > from the three websites, I show O/OREOS being 3.5 minutes ahead of RAX, > and RAX being a 1.33 minutes ahead of FAST1/2. > > Ryan, KB1LKI > > On 11/30/10 4:54 AM, amsat-bb-request(a)amsat.org wrote: > > ------------------------------ > > > > Message: 4 > > Date: Mon, 29 Nov 2010 22:55:16 +0100 > > From: PA3GUO<pa3guo(a)upcmail.nl> > > Subject: [amsat-bb] O/OREOS TLE errors ? > > To:[email protected] > > Message-ID:<19767175.1291067716437.JavaMail.root(a)viefep21.chello.at> > > Content-Type: text/plain; charset=utf-8 > > > > Dear all, > > > > I keep on having troubles with the O/OREOS kepler sets. > > RAX and the others are fine. > > > > With todays version (as from the O/OREOS dashboard on the web) > > - NOVA gives O/OREOS just a bit behind RAX > > - HamRadioDeluxe give O/OREOS 35 minutes behind RAX > > - The O/OREOS web (dashboard graphic) shows O/OREOS 35 minutes behind RAX > > - My private antenna tracking tool does not recognize the keplerset of O/OREOS > > > > Anyone else has experienced this (and maybe even a solution) ? > > Henk > > -- > > Henk, PA3GUO > > -- Henk, PA3GUO

2 1

AO27 and TS 2000
by Mateusz 26 Dec '10

26 Dec '10

Hallo TS 2000 users known very well how irritating is internal bird on 436.798 MHz. It is makes impossible(*) to operate AO27 at AOS, has to wait close to LOS or forced to use preamp that is questionable in urban area. I tried today to make QSO on AO27 just after AOS. I was listening in AM mode arround internal bird and did QSO with OE6MDF.A few seconds after AO27 was off (packet). * - try listening in amplitude modulation arround internal bird :) SQ7DQX

1 0

Re: no signal, please help
by G0MRF＠aol.com 26 Dec '10

26 Dec '10

In a message dated 26/12/2010 07:05:57 GMT Standard Time, n.mahdinejad(a)gmail.com writes: Hi Dear. I have visited that website, now in my installation every thing is ok, antennas track the sateliites and ICOM set to satellites ferequencies but there is no signal, could you please help me what is the problem. Thanks for your help and attention. Hi. 1) check you have a good connection between the antenna and the receiver. Do this by listening to a weak local signal. This will check 'silly' errors e.g. Not having the RF gain control turned to the correct position. 2) When you have the weak local signal coming through, turn the antennas so you can check they are OK. You can see from the S meter that the antenna has the correct 3dB beamwidth for the expected gain. 3) With the system checked out on local signals, select a satellite with a strong beacon signal. My personal suggestion is HO-68. It has a 200mW CW beacon that is very easy to hear and it is on 24/7. Check for the the next suitable pass, perhaps one with an elevation that exceeds 30 degrees. Then check your computer is giving correct the correct tracking information by going to N2YO.com. If your PC and N2YO agree, then you are ready for a pass. 4) Set up the radio 15 minutes in advance of you aquisition of signal. Point the antennas towards the horizon where you expect the satellite to appear. Set the radio to CW (wide) and set to 435.790 (beacon frequency) then add about 9kHz for doppler. 5) Wait and see if the satellite appears as expected. If the satellite 'fails to appear' and your antenna starts to track across the sky, switch the tracking off. There is no point tracking something that is not there. Look for errors, perhaps move the frequency +/- 5kHz....but if you have done all the above, I suspect you will be listening to the reassuring beeps from HO-68. You can then check tracking and doppler compensation if you have it. Regards David G0MRF

1 0

true tle
by N. Mahdinejad 26 Dec '10

26 Dec '10

Dears. Merry Christmas. I wish all of you have happy holidays. I have question about true tle of amsat satellites. There is one set of TLE in celestrak and one in each satellite webpage in amsat . those are different from in clestrak. Which of these TLE are true that I can use in unitrak for tracking? My tracking predictions in following two pages are different. I don’t know why? http://www.amsat.org/amsat-new/tools/predict/index.php http://www.amsat.org/amsatnew/satellites/satInfo.php?satID=116&retURL=/sate… Any help would be gratefully appreciated. Best Regards.

2 1

no signal, please help
by N. Mahdinejad 26 Dec '10

26 Dec '10

Hi Dear. I have visited that website, now in my installation every thing is ok, antennas track the sateliites and ICOM set to satellites ferequencies but there is no signal, could you please help me what is the problem. Thanks for your help and attention.

1 0