[amsat-bb] ARISSat-1 Operational Survey at 2012 ARRL/TAPR DCC (Digital Communications Conference), Atlanta
ARISSat-1 Operational Survey by TAPR's Steve, N7HPR at 2012 ARRL/TAPR DCC (Digital Communications Conference), Atlanta http://youtu.be/t0i_6in8CE0 More Info about TAPR at: www.tapr.org ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Operational Survey by Steve, N7HPR at ARRL/TAPR DCC, Atlanta, GA, September 21, 2012
ARISSat-1 Operational Survey by Steve, N7HPR at ARRL/TAPR DCC, Atlanta, GA, September 21, 2012 http://www.youtube.com/watch?v=t0i_6in8CE0list=PL2Uw0HJVsJgbkEi1cu1N_4K1SJzIu-PLx ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 GeoReferenced SSTV Images
Hi Everyone, I spent some time plotting the ARISSat-1 SSTV images geo-spatially. Let me know what you think! http://libjoe.blogspot.com/2012/02/arissat-1-sstv-images-geo-referenced.html Joseph Armbruster KJ4JIO ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT and such presentation material ?
All, I have been asked to do a presentation at a high-school about satellite telemetry and LEO amateur satellites and such. I wonder if there is any material I could use out there such as power points or so with pretty diagrams and pictures ? Maybe even something about the latest batch of cubesats ? Thanks, Andreas - VK4HHH ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Orbit / Telemetry Correlation
I did some more work tonight on the telemetry data. http://libjoe.blogspot.com/2012/02/arissat-1-analysis-correlated-telemetry.html Joseph Armbruster, KJ4JIO ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Keplerian Elements Analysis - Eclipses and Elevation
All, I did some work tonight calculating Eclipses and looking at differences in elevation. If you are interested in peer reviewing my calculations, please let me know and I will send you some files. http://libjoe.blogspot.com/2012/02/arissat-1-analysis-eclipses-and.html Enjoy! Joseph Armbruster, KJ4JIO ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Keplerian Element Analysis
Everyone, I started digging into the ARISSat-1 Keplerian Elements in more details. See some of my effort here: http://libjoe.blogspot.com/2012/02/arissat-1-keplerian-element-analysis.html Right now I am generating some basic plots but I wish to do much more with this, such as: - intersect this with the telemetry data - there are many ways to do this the first will be plotting temperature values along the line of orbit as the satellite entered / exited eclipse - maybe generate a few fly-by videos that show line-of-site to a particular station that was receiving telemetry / sstv at that particular time If you have any comments or suggestions, feel free to share them. I am really excited right now because I am using my code and made my first correct plots this evening! If we knew (or could predict) the satellites orientation at a particular moment, I could drop in a model of ARISSat-1 into the scene and orient it correctly. I think this will be a great way to interactively visualize what happened during the satellites lifetime. Joseph Armbruster, KJ4JIO ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 TLM decod tool
Is there any tool to display ARISSat-1 telemetry date form CSV files and binaly files on ARISSat Telemetry Archives which are decoded by ARISSatTLM? Thank you for you help 73 Masa JN1GKZ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Operation Survey
The ARISSat-1 team created an Ops Survey last September. Have the results been published anywhere? Clint Bradford, K6LCS ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Die Hards
Or why not just turn the voice transponder on one of the two radio's that are on the ISS? Hmmm... Or why not just install whatever type of setup that would make everyone happy ON THE ISS? Why waste all that money developing/building all these sats and then waste all that money on a launch vehicle that does not deliver the package like how many times in the past? But considering the last escapade with ARISSat-1 I guess it would be asking to much... :) Kevin KF7MYK ___ Sent via AMSAT-BB@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
[amsat-bb] arissat-1 current keps
Just to make sure I'm on schedual. I see the next pass at about 1933Z at CN87 with a elevation of about 76 degrees. I realize the keps on this thing can change by the minute. 73 Bob W7LRD Seattle, Wa. ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT 1
Nice clear signal at 1803 Z here in San Jose, CA. IHU temp 42 degrees. Pete WA6WOA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Voice #2
23:50-23:56 UTC, 3 Jan 2012, Ele 22 S-SE-E, 145.950MHz FM over Japan http://www.ne.jp/asahi/hamradio/je9pel/20104ar1.mp3 1:22-1:27 UTC, 4 Jan 2012, Ele 7 W-WN-N, 145.950MHz FM over Japan http://www.ne.jp/asahi/hamradio/je9pel/20104ar2.mp3 JE9PEL, Mineo Wakita ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 still functioning
Good telemetry during the 1933Z pass today. No major changes in temperature noted. Using today's keps, height is 184.2 km, so it can't stay up much longer. Max elevation was 39 degrees and had to manually tune to keep the audio in the telemetry decoder. 73, Ken, W7KKE CN75xa ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1: Goodbye little guy...
No reception over NH at the predicted time of around 14:25. I kept the receiver on for a while before and after, but nothing. One of my programs said it was at 147Km; the other said 127. If 127 is right, then it's probably down. Otherwise, maybe it overheated. Also the last telemetry on the web site is for 6:02z 4Jan. Apparently no one else over a swarth from Mexico and Texas up through New Englad received it either. On the last telemetry frame, the RF temp was 88C. Not quite enought to fry eggs, but not good for semiconductors. It's been a lot of fun Burns, W2BFJ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1
Hello to All Just copy sstv on 145950 FM , at 19:59 utc max elev. 4 dgr with good signals. Best 73! Pedro Cruz - CU2JX ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 R.I.P.
Applause and accolades to the ARISSat-1 Team, for the tremendous amount of fun, excitement, opportunities and activity that ARISSat-1 provided! I got hooked at launch, listening/watching on the internet even as I was also on HF that day conducting an exercise with the local and state R.A.C.E.S. teams and the local nuclear power plant during the launch. I started tracking and gathering telemetry a few days later and dedicated a PC and my sat station to automated telemetry gathering 24/7. I split off the 2M signal to my FT-817 and captured hundreds of amazing SSTV pictures. I enjoyed watching the telemetry decoding program on my PC showing the live readings. I followed especially in the last days, on the arissattlm.org web site. Much of this excitement I shared with my local ham radio groups in meetings and on the air, with local children and non-hams, and even in Colombia over Christmas I engaged some of the family with listening for the secret word in Spanish. A few attempts were made when I had time, to make contacts through the transponder. I heard myself and others, and had a part of a QSO... but never got that complete QSO. I became so engaged with the telemetry that near the end, I wrestled with the decision to try a transponder contact or to keep copying telemetry in hopes of the last telemetry award! Thank you very much, all who made ARISSat-1 possible. Your work was very fruitful indeed. I look forward to the Fox family and hope that we can keep up the enthusiasm and support necessary to stay on the air in space! 73, Jerry N0JY ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Voice
23:50-23:56UTC, 3 Jan 2012, Ele 22 S-SE-E, 145.950MHz FM over Japan http://www.ne.jp/asahi/hamradio/je9pel/20104ar1.mp3 JE9PEL, Mineo Wakita ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 QRT
Hi all No signs from ARISSAT-1 at 1011z. It must be SK by now... Thanks for the great memories! Congratulations to all team for this absolute sucess. 73 F.Costa, CT1EAT http://ct1eat.no.sapo.pt ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 RADIOSKAF-V KEDR Signal Status
ALL, I very much regret to report that on the pass over Cincinnati this Morning using Dr. Kelso's Keps for January 4, 2011 with the AOS predicted at 14:24Z, there was no evidence of any signal on 145.950 or 145.930 MHz. It may be that this very enjoyable, interesting and challenging satellite is now history. What have others determined as to signal status? Excellent signals were last heard in this area of the USA from ARISSat on the January 3, 2012 pass at 22:43 Z by W4HTB, Bowling Green, KY, WB8LGA, Marengo, Ohio and W8ZCF, Cincinnati. Farrell Winder,W8ZCF Cincinnati, Ohio ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 and Japan
Hmmm ... One of the first reception reports of ARISSat-1 after deployment comes from JN1GKZ in Japan. And the satellite re-enters Earth's atmosphere - over Japan. Just wonderin' out loud ... (grin) Clint Bradford K6LCS ___ Sent via AMSAT-BB@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
[amsat-bb] arissat-1 reception with video.
As an avid Hamsat operator with limited equipment I was able to listen and record a pass of arissat-1 two days ago. My goal was to make a memento of sorts for my log of new acheivements for 2012.I thought some readers might like to see it. 73, VE7DAO / VA7ISS http://ve7dao.blogspot.com/2012/01/listening-to-arissat-1-with-arrow.html ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 still fully functional (12:20utc) (incl mp3 recordings)
03 Jan 2012 / 12:16 UTC pass: ARISSAT-1 satellite is still fully functional. MP3 recording of CW transmission via the transponder: PA3GUO ARISSAT1 03JAN2012 (Jan 03,2012 / 12:16 utc) http://www.pa3guo.com/arissat1_cw_03jan2012_1216utc_pa3guo.mp3 MP3 recording of FM (voice) telemetry at 145.950 MHz (Jan 03,2012 / 12:21 utc) http://www.pa3guo.com/arissat1_telem_voice_03jan2012_1221utc_pa3guo.mp3 SSTV picture: http://www.pa3guo.com/arissat1_sstv_03jan2012_1216utc_pa3guo.jpg -- Henk, PA3GUO The Netherlands ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1: 13:50utc pass: still functional
Also the 13:50utc pass: satellite still functioning correct Henk, PA3GUO ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 descending rapidly
According to the morning numbers from Space Track, ARISSat-1 is down to 191 km, and losing about 1.5 km per orbit, or about 1 km per hour. The drag effects are increasing rapidly, so TODAY would be an excellent time to make any last minute QSOs through the transponder. Thanks to those who are keeping live telemetry flowing. This is one tough satellite! 73s, Alan WA4SCA ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1: Keeps on ticking (but is it taking a licking?)
A nice strong pass over NH around 1500z. Many telemetry frames decoded and forwarded. The little guy is still going strong! Oddly, the doppler predictions seemed to be pretty close today even at its highest point when the frequency changes most rapidly. Is there low solar activity or something? Anyway, I have notced pretty high temps in a few places, for example the IHU temp has been in the 60s. RF was in the 70s once, I think. The solar cells are high, but that's not surprising anyway with the sun shining on them. Hoping for another pass around 2115z. Burns, W2BFJ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 RADIOSKAF-V KEDR Reception
All, Report that 1st part of 16:34Z pass covering Cincinnati was strong. A couple of minutes later noted some erratic behavior on trying to receive own transmitted CW, then return signal became weak. Did hear some good CW dots but no call letters followed. Try next pass at 18:08 Z I will be correcting for doppler to receive my signal on 145.930. Will listen for any stations CW or USB. Farrell Winder, W8ZCF ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 reentry?
Hello everybody: This is David EA4SG. Just a moment ago at 16:54 UTC while the Arissat-1 was over the vertical of Madrid, I was listening to the SAT and it stopped/interrumped suddenly its transmissions while it was still in a theorical sunny or iluminated area. Not sure if it was the final re-entry but It could be. So I decided to leave this info here. The last sent voice message sent was the italian one and at the end of the secret word, it stopped. A moment before, I was able to record around 40 seconds of CW telemetry in 145.919 Khz but very poor signal/noise rate. Best 73s David EA4SG ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 in So CA
Current pass (like RIGHT NOW - 10:03AM PST) was three minutes ahead of AMSAT-NA's Keplerian data. But I couldn't have asked for better reception ... Temps were 42C and 41C ... Clint Bradford, K6LCS ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1
All, Copied beacon for pass at around 1800Z. Copied W8ZCF on cw through transponder at 18:10Z at about 3 deg elevation. Voice beacon also observed briefly. 73 WC7V Kerry ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1
Monitored the satellite fm broadcast at 1805z keps seem current keps seem accurate, signal dropped out at the calcuated time. 73 Bob W7LRD Seattle ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 RADIOSKAF-V KEDR Status
Still loud and clear on the 18:08Z Cincinnati pass. Downlink on own signal good but no response to CQ.. Try the next one at 19:41Z . Farrell Winder, W8ZCF Cincinnati, OH ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 still going strong Jan 02, 2012 / 14:16 utc pass over Europe
http://www.pa3guo.com/arissat1_voice_telem_pa3guo_02jan2012_1416utc.mp3 ARISSAT-1 still going strong Jan 02, 2012 / 14:16 utc pass over Europe: - very strong downlink - transponder active (CW uplink was easy, OZ1MY had very clear voice signal) -- Henk, PA3GUO ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 18:35 Pass
All, Just listened to the 18:35Z ARISSat pass over Cincinnati. Satellite was on time but signal on both 149.950 MHz and 149.930 seemed to be much weaker than usual. How did others in Midwest and Eastern US receive? 73, Farrell Winder, W8ZCF ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 RADIOSKAF-V KEDR
ALL, ARISSat on the 21:40 Z pass Dec 2, 2012 for Cincinnati was right on the mark and had good CW signal return from the transponder. Heard someone calling but could not get reception above the noise floor. Trying next pass at 23:12 Z but it may be eclipse controlled. 73, Farrell Winder, W8ZCF ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1, inductor temps rising
Topic says it all...I don't remember the inductor temps being much above 50 deg; this is just from memory, not a data plot! Anyhow, to me this appears to be the first indicator that things in the bird are warming up... 73! Mark L. Hammond [N8MH] ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 What a bummer!
I heard myself well on SSB and real well on CW, and heard another station trying to find themself but apparently they couldn't hear me (and I didn't copy a callsign). One more pass tonight here for Texas and the west, 00:45UTC... anyone else going to be trying the transponder? 73, Jerry N0JY ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 today
I heard the FM signal and a lot of SSB on the pass around 12:45 today, although it was low in the sky. I heard PA1BQV (dyslexic moment, could be BVQ?) towards the end of the pass but didn't copy the callsign of the station he was working. Nothing at all on the 14:10 pass, although it was a good 14 degrees high. -- Gordon JC Pearce MM0YEQ gordon...@gjcp.net ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat height and decay rate
Updated graphics for ARISSat height (km) and decay rate (km/day): http://www.qsl.net/py4zbz/arissat.htm#r there are only 2 or 3 days for re-entry... 73 de Roland PY4ZBZ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 SSTV cameras
Hi folks, I just received an ARISSat-1 pass that crossed into eclipse about 80% of the way by. As expected, the FM signal dropped pretty much immediately upon entering eclipse. But that's not the reason for the post... I got a really neat SSTV picture of the Sun streaming into the camera, just a few seconds before the eclipse. Unfortunately it didn't show the planet below (ran out of picture), but it got me thinking: Did the design team do anything to protect the cameras when they're looking directly into the Sun? Were these special cameras, or are we counting on the satellite spin to keep them from getting too much of a sun tan and burning a hole in the sensor? I ask because the camera I mounted on my Az / El rotor is dying, and I need to replace it. I built a mechanical shutter to cover the lens when not in use, but I wonder if it's worth keeping that mechanical contraption when I get the replacement. Thanks, Greg KO6TH ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 transponder question
Happy New Year! This morning I kicked off the new year with 2 passes of ARISSat-1, copied both CW beacon, BPSK telemetry and FM voice/SSTV simultaneously on Kenwood TS-2000. I would also like to try the transponder but don't know if my transceiver allow it? This TS-2000 has all modes on its main transceiver but its sub receiver only supports AM or FM. Could anybody help? Thanks, Thu XV9AA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 RADIOSKAF-V KEDR
All, I am most pleased to advise that ARISSat-1/ RADIOSKAF-V/ KEDR is very much alive and giving an excellent performance through the 475.750/145.930 MHz TRANSPONDER. On the 17:54Z pass over Cincinnati today December 30, I sent and copied my picture. Picture was my ATV call ID used for fast scan. Picture came through all together but does have noise, particularly in the last half. I will send it to the ARISS SSTV Gallery for consideration to post. I hope others will also experiment with CW, voice, and SSTV via the Transponder. 73, Farrell Winder, W8ZCF Cincinnati, Ohio, USA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat Today--low power, I would guess
Hi, I had two passes of ARISSat today over New Hampshire. The first one, I only caught the tail end and got a Kursk frame or 2, but no satellite telemetry. The second one I had nice and strong as soon as it appeared above the horizon, but it must have been in low power mode. The transmission cut off cleanly (no fade). Then shortly afterwards it came on again and cut off again. I should have timed them but did not. I had 3 periods of reception during the pass. Unfortunately, none was long enough to let the telemetry decoder get a frame. Farrell, were you sending SSTV to the transponder around 1630Z? It did look like SSTV on the spectrum diagram but it was not doppler synchronized, so it was drifting even when I synchronized. It also disappeared long before my pass was over, as I would have expected if the source were way west of me. Burns, W2BFJ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1
Strong signal on the FM downlink 145.950 here in urban Cali, Colombia, S.A. on a nearly overhead pass at 14:55UTC. 73, Jerry N0JY ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1
Hi Arissat-1 still working fine . Transponder signal very good on a pass of 45 degrees. http://www.youtube.com/watch?v=Ws9W78_t_C0 73 PY5LF LUCIANO FABRICIO Curitiba-PR-Brazil GG54jm http://www.qrz.com/db/py5lf http://www.qrz.com/db/py5lf ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1
I was able to copy ARISSat-1 during three passes today but as was mentioned in a previous bulletin, the signal seems much weaker, and I have had to correct the frequency often which means the keps are not up to date although I downloaded them this morning. I just downloaded them again a few minutes ago and noticed a big change. She was also in Low Power mode in full sunlight again. I did work CW through her and heard my signal on the downlink but it was weak and warblely (if that is a word). I am thinking it is tumbling quite a bit. I am beginning to believe that the predictions for de-orbit on the 30th might be accurate. I must say it has been fun and I hope we have all learned lessons from the experience. I'll keep monitoring until it is confirmed that de-orbit has occurred. I am looking forward to Hamcation in February so I can sit and chat (debrief) with all the fine people who put her up there. 73, -- *Carl W8KRF* ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1
I wanted to let W6IHG that I did hear him through ARISSat-1 during my 1817 UTC pass. I have an audio recording of that pass. I believe I also heard WB2OQQ. There was also a station sending SSTV through the transponder but the station was not using Doppler. He went right out of the bandpass. I tried to follow but could not. I noticed that even though ARISSat-1 was in full sunlight, it went into Low Power mode. I was able to get a pretty decent SSTV copy during that pass, also. I am trying to determine what I am going to do when it terminates. It has taken up a good portion of my operating since August 4th. HI HI. There is another pass coming up in 5 mins (1951UTC). It will be a 13 degree pass so that should be pretty decent also. 73, -- *Carl W8KRF* ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat : only a few more days !
Within a few days, ARISSat will burn in the atmosphere! The fall rate dh/dt is increasing dramatically! Look at theupdatedgraphs of height and fall rate here: http://www.qsl.net/py4zbz/arissat.htm#r 73 de Roland. ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 (37772) decay date update for 2011 Dec 27
Greetings, The decay rate of ARISSat-1 has slowed down from the last decay prediction I produced on 2011 Dec. 14. It currently appears that ARISSat-1 (37772) will now decay on 2012 January 3 plus or minus a day. Caveat lector. Jim, N8OQ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 RADIOSKAF-V KEDR
Does anyone have a prediction of the lowest altitude for ARISSat-1 and still have it be functional? With the latest Keps I show its altitude around 155 miles. Depending of signal strength on today's Cincinnati passes I might try another SSTV via the Transponder adjusting my Tx to receive on 145.930 MHz (+/- depending on location). Hope others will also try with voice and video. Farrell Winder, W8ZCF Cincinnati, Ohio ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 heard
I heard ARISSat-1 loud and clear at 15:55 UTC pass. Did not decode any telemetry due to bad sound card setup :( Data transmission and CW sounded very healthy indeed. -jari oh3uw ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAt-1 STK
Is anyone using STK to do any analysis on ARISSAT-1. I have it installed with the free license but it looks like a steep learning curve to figure out. Anyone with experience to give me pointers off line? ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 European Activity and Status update.
Hi all, I again monitored and worked into ARISSat-1 during the earlier pass and the final one as it entered eclipse over here in Europe. The early pass was a low angle from my QTH and screened by buildings so I was not able to access the satellite. However the FM downlink was quite reasonable and I did hear someone active on CW . The final pass as it moved into eclipse was really remarkable and my downlink and the FM transmissions were booming in . The loudest that I have ever heard from the satellite, in addition I quickly monitored the CW portion and someone was booming in, I could not stay at that end of the band as I was trying to make schedule on SSB. Heard someone calling but not able to confirm whom it was as they were not easy to copy. I wonder in view of the recent predicted re-entry if the loss of height is perhaps why it is now so strong, or was it perhaps the angle and coverage of the satellites antenna? Will try again tomorrow evening and thanks to those that were hoping to make a contact. Ken Eaton GW1FKY Amsat-UK Amsat NA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat height and fall rate
Updated graphics for ARISSat height: http://www.qsl.net/py4zbz/arissat.htm#r 73 de Roland PY4ZBZ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 European Passes
Hi all, I worked into ARISSat -1 this evening( Wednesday 21st December, 1730 hrs) prior to it shutting down via the timer as it moved into the eclipse area. My downlink was quite healthy once again just using an Elk antenna and about 20 watts RF power. Sadly no takers/response to my CQ calls , I also can report that the FM transmissions were also healthy including SSTV. ( I was not set up to decode or record this) The opportunities over here in Europe will improve with regression over the next few days and I will once again call in to the satellite whilst it is still active and available prior to it perhaps loosing major height. Thanks to all of the team and key players in this project which has been of significant value to me personally for use as a demonstration and example of our hobby. Merry Christmas and Very Best wishes and Good Luck to all for the coming New Year. Ken Eaton GW1FKY Amsat -UK Amsat NA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 Pass Over SoCal Tuesday
If these keps are correct then hams in DM04rj will be treated to a 53 degree pass from ARISSAT-1 around 2331 UTC (331pm local) this afternoon (Tuesday). Here in the Santa Clarita Valley, 30 miles north of Downtown Los Angeles, we are surrounded by 3000-6000 foot peaks. We have not seen a pass above 20 degrees since mid-October. To date I have only managed to successfully receive ARISSAT-1 twice, I'm hoping this afternoon I will be able to receive a SSTV image, decode some telemetry or contact someone through the transponder. -- Bryan Herbert - KE6ZGP Newhall, CA. DM04RJ USA http://bryanherbert.com http://twitter.com/ke6zgp ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat height
Please see the updated graphics for ARISSat height here: http://www.qsl.net/py4zbz/arissat.htm#r 73 de Roland PY4ZBZ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1/RADOSKAF-V/KEDR
Note excellent ARISSat-1 SSTV Pictures today from DJ3AK and JA0CAW listed on the ARISS SSTV Gallery. How about these stations and others trying to send pictures through the Transponder 435.750 up and 145.950 dn and posting results on the Gallery. Possibly only a few weeks left to experiment with this Historical satellite! It appears that only 3 stations have sent images through the transponder to date? Respectfully submitted, Farrell Winder, W8ZCF Cincinnati, Ohio ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 - NOT Dead yet!
Wow - ARISSat-1's pre-recorded voice messages, computer voice info, and images were booming here in Southern California just now! Clint Bradford K6LCS ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat height
See the updated graphics for ARISSat height here: http://www.qsl.net/py4zbz/arissat.htm#r Often, ARISSat switch from high power to low power mode when passing over my QTH in Brazil, despite being fully illuminated by the sun. Coincidentally, this happens when he enters the SAA, South Atlantic Anomaly! Is there any relationship? 73 de Roland PY4ZBZ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat
Updated graphics of average height and fall rateof ARISSat: http://www.qsl.net/py4zbz/arissat.htm#r 73 de Roland PY4ZBZ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Orbital Decay
Hi Satelliters, Using Keps from Space-Track for ARISSat-1 (37772) I have been plotting various parameters including Mean Motion. Rrecent results were unexpected. From day 328to 334 the daily change in Mean Motion has been exactly the same. The orbital decay is going at a very steady rate. This is completely different from earlier observations where there is quite a bit of daily variation. My interpretation is that the atmospheric density along the orbital track has been remarkably unchanged over 6 days or so. This is something I have not seen before. 73 John G7HIA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 (37772) decay date update for 2011 Nov. 30th
Greetings, Using solar data through 2011 Nov. 30 and updating the decay fit I am getting a re-entry date of 2012 January 12 with a rule-of-thumb error estimate of +/- 10 days or so for ARRISSat-1 (37772). Regards, Jim, N8OQ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Telemetry
How do I know whether or not the data I have been submitting has in fact been received? I noticed my call sign does not appear in the list on DK3WN SatBlog and I am sure I have submitted more frames than some of those listed. Up until now, I was not interested in a certificate but after seeing a copy of one, I would now like to get one. I have all my CSV files so I can send them in, if necessary. I also have several wav files of the Voice transmissions. I have SSTV images and wav files posted on my website at www.w8krf.net. Is there something else I need to do to get the certificate? 73, http://www.dk3wn.info/p/ *Carl W8KRF* ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Height Profile
The following graphs show the decrease in average height (km) of ARISSat and the fall rate (km/day) since the launch on 08/03/2011 and until 21/11/2011. The calculations are made by me from the daily Keplerian data. It is clearly visible the irregularity of the fall rate, due to variations in solar flux, which cause variations in the density of the atmosphere and therefore in drag. http://www.qsl.net/py4zbz/arissat.htm#r 73 de Roland PY4ZBZ. ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 (37772) decay
Greetings, First, thank you Mineo for reading the AMSAT Journal and making several of my papers available on your web site. My AMSAT Journal paper published in the March/April 2011 issue is actually still fairly valid for the scenarios shown in the paper. The solar flux has turned out to be somewhat higher than was used/predicted in the paper. This has caused the atmospheric densities to be higher which results in higher decay rates. When I wrote the paper I had this nagging feeling that stopping the release height scenarios at 370-km was not going to be high enough. We are very fortunate that the ISS was boosted to such a height before release of ARISSat-1 and not after release! There is a valuable lesson, I think, to be made with respect to predicting satellite decay dates far into the future. The future state of the atmosphere, i.e. the atmospheric density that the satellite will pass through is poorly predictable in the long-term, say starting greater than a week or two into the future. Predictions of satellite decay dates months in the future should be evaluated with the understanding that your date of prediction errors may be large. The errors are due to the future uncertainties of the orbital path which grow quickly with time in a prediction. The atmospheric density is not the only source of error. Your orbit model, the integrator, and the accounting of the gravitational and drag forces among others will affect your results. Predictions of satellite decay dates are not do-and-forget. The general process is to make a prediction, get new measured observations of the height in the future, and at some point re-do your prediction when the errors become significant to you. With that all said here is my current prediction using the same tools used in the AMSAT J. paper and produced as of 2011 November 13th. The decay of ARISSat-1 (37772) will happen nominally on 2012 January 30th with a 10% rule-of-thumb error allowance of 18 days around this date. The errors may be larger than the rule-of-thumb indicates! Jim, N8OQ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 BPSK
Hi folks, Just got my first 1000 BPSK frames of data using the ARISSat-1 Telemetry software. Appreciate most of you on the bb have probably already done it already. I just wanted to say a public thank you for a superb and easy to use piece of software. Looks cool on screen too. Using the CW beacon as a reference to stay on tune is brilliant, worked well, even with manual Doppler tune. Anyone not yet tried it, give it a go. WX4SXM's quick Start Guide will put you on the right track. 73 All off to get a few more frames G7HIA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Re-entry Prediction
I calculated and predicted the time of ARISSat-1 Re-entry. http://www.ne.jp/asahi/hamradio/je9pel/arissat5.htm JE9PEL, Mineo Wakita ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Nov 3, 2011
Did anyone hear signals from ARISSat-1 on the last pass, (16:53 Z Cincinnati) ? I did not hear anything on 2 m or the transponder. Will listen and try both 2 m and also Tx thru the transponder ,Rx approx 145.930 +/- doppler. Farrell Winder, W8ZCF ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Cincinnati Pass 21:14 Oct 26
Appreciate confirmation of station calling W8ZCF on subject ARISSat Pass. Was it W9ORD ?? Freq had QRM from local BC station harmonic. Thanks to station calling. Farrell Winder, W8ZCF, Cincinnati Ohio ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat received spectrum
Today I copied the spectrum of signals received from ARISSat with an SDR-IQ (and homemade VHF / HFconverter ) and SpectraVue. The frequencies listed are the transmitted by satellite, and Doppler effectis clearly visible in the received signals, with higher frequencies at the beginning and lower at the end of the pass. The noise generated by linear transponder and the return of the transmission that I did in the UHF uplink are clearly visible. The CW-2 signal close to the 1kBPSK telemetry signalcan also be seen, as well as FM transmissions, switching between voice and SSTV. Please see here: http://www.qsl.net/py4zbz/arissat.htm#o 73 de Roland. ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 for educators paper// 11 days till Arissat-1 returns
Hi all! A friend of mine is a schoolteacher who is planning on using Arissat in a classroom presentation. I wrote a paper detailing how to install/configure Orbitron and Nova for Windows demo (for eclipse prediction). Also included are some helpful setup procedures for field operations. Anyone who would like a copy of this please let me know. 73 de Norm n3ykf ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Contact Experiment via Trqnsponder
In follow up of my previous post request, ARISSAT-1 did not activate for my location in Cincinnati until there was only about 40 seconds left in the pass which started at 13:44Z AOS. However, I did hear my CW signals with slight fading. Due to the eclipse delay and orbit it does not appear favorable at my location for further experiments via ARISSat-1 transponder for several days. . Thanks to anyone who might have tuned for my signal. Farrell Winder, W8ZCF, Cincinnati, Ohio ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Silent? ( Request)
*Hi All, I was listening on the 145.95 Voice telemetry Beacon Freq. @ 1310 UTC pass here in ENY didn't hear a peep from ARISSat-1 , was wondering if it has gone silent? My Grid Square is FN31! 73,.Stu (WA2BSS) PS (a request) Was wondering if someone has a Duplexer? *IE a Box, on 1 nd is where the Coax gets connected, on other end is 2 short coax cable lengths; 1 length goes to 2 meters; the other length goes to 70 CM1) (I have a Kenwwod TS-2000) * ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat and Elk or Arrow
I've been wondering if anyone besides me has tried to hear themselves using an Arrow or Elk antenna via ARISSat's linear transponder. If you have tried it and successfully heard yourself, please let me know. I'm curious as to what was your formula for success. The rig I've been using is an FT-847 and for an antenna either my Elk or Arrow mounted to a camera tripod. I've made about six attempts now on passes that I thought were very favorable to success. I've had zero trouble receiving telemetry or SSTV during these passes so I'm sure the bird was actually overhead during my attempts. I'm not ready to give up but time is running out. 73 Clayton W5PFG ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 silent over UK: Explanation
As reported over the weekend, Arissat-1 is no longer audible in the UK, because she does not switch on until after about 14 minutes from entering sunlight. I believe the sequence is: enter sunlight: MET starts: timer activated 14 minute wait before tx - other systems live Tx on with data at a MET of 14 minutes Tx sequence We in the UK now have to wait unril the orbit continues to precess to the late evening (about 10 days' time) 73 de andy G0SFJ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat in sunlight
Interesting thread regarding MET and ARISSat-1 switch on. Someone made the very good point that the transition in or out of sunlight (eclipse) is not an on/off event. I remember many MIR visuals, and as she passed from sunlight in the west to darkness in the east there was a significant time, perhaps a minute or more when she changed colour from bright and silver white to orange then disappeared into blackness. I always interpreted that as passing through the penumbra, or semi shadow area. ARRISat-1 is at at around 370km, does anyone know how to find the width of the penumbra at that altitude? Working out the transit time through that region might be informative. 73 John G7HIA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat in sunlight
Using Orbitron 3.71 software, I can tell that the penumbral duration today was 9 seconds. However, this will vary in the future as the angle of the orbit to the sun changes. However, the first sunlight the satellite will get will be very red (due to the blue light scatter caused by the atmosphere). I have observed that ARISSat-1 doesn't start transmitting for a further 14 minutes. To be more precise, I am seeing the Mission Elapsed Time (MET) counter start counting from zero about 40 seconds after coming out of eclipse, and the first BPSK telemetry frame has a MET=808. The first KURSK experiment data isn't transmitted until MET=945. However, since 12th September the KURSK experiment appears to have failed and is only sending null data. 73s, Simon G7WIQ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat daylightpower recovery time
Although I have severely limited satellite visibility I have been copying telemetry from ARISSat1 for some weeks. I live in a valley surrounded by chalk hills and cliffs over 100 metres higher than me so my visible horizon is +12 degrees to +18 degrees at best. Also my 3+3 element short crossed yagi and rotator are in the attic! This worked beautifully when the satellite batteries held up and now when ARISSat is powered up. However I notice it can take 10 minutes or more from the time the satellite enters sunlight until the system bursts into life. At present this means loss of telemetry at this location when ARISSat is over the Atlantic, and even on overhead passes if it has been in sunlight for less than 10 minutes. Question is why it takes ARISSat so long after entering sunlight before it starts transmitting? Surely if the batteries have failed high resistance the voltage should be up within seconds of entering sunlight. Dick G4BBH ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1
John K8YSE, thanks again for the QSO on ARISSat-1 today. They're not easy, but it can be done. That's my third on the bird. 73 de Sebastian, W4AS ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 Voice telemetry analysis from G0SFJ
I have submitted for a tlm certificate my analysis of the voice telemetry from Arissat-1 on certain orbits in September (when I was present, hi). The dates of the receptions in September are in the analysis spreadsheet. The MET is decreasing, I think this is because the satellite comes out of eclipse and swithches on nearer the observation, as the orbit is precessing I think the analysis shows that as the MET decreases, the IHU temperature decreases, and the battery current increases (this is a lesser negative number). Put that another way, as the MET in sunlight increases, the IHU temperature increases and the circuit current decreases (greater negative number). However I don't know why the circuit reports a negative current, or even if the voice tlm is accurate. I'd be grateful for any comments. 73 de Andy G0SFJ . ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1
I have made 2 different successful short duration CW transmissions through the ARISSat-1/RADIOSCAF-B transponder over the last 2 days. Called CQ with no replies. My receiver fixed to receive on 145.934.5. Transmissions made near 435.950 and varied to receive. I received back my signal very weak but clearly readable. Will be trying again with above freqs on Monday Sept 19, 2011 on passes over Cincinnati, Ohio beginning 13:50Z. Be listening for anyone trying to connect. Farrell Winder, W8ZCF ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT telemetry - no kursk frames
Hi all, I had a 1 deg pass this morning and could grab 18 telemetry frames (!). Interesting was that I received no one KURSK frame. Can someone confirm this? 73, Mike DK3WN ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1
Today I was able to make my first contact on ARISSAT-1. It was at 2038z with Sebastian, W4AS. It took a while for us to make it, but we finally succeeded. Was Sebastian's second contact. Glad I was able to make at least one contact before we loose the bird. ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 KURSK frames all zeros
On the just concluded pass of ARISSat, all the KURSK frames I copied were all zeros (except for the header). Is there a problem or a change? Ron W5RKN ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat observations
I have noticed on a number of daytime passes over the Southern US that the satellite is ON at AOS but within a minute or so switches off, NO FM, CW beacon or BPSK. Is this what is considered normal and I did not interpert the operation scheme correctly. Secondly, I have been sending in telemetry reports, should we hear that they are accepted ? 73 Jack, W3TMZ ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 KEDR Award
I am very happy! I received my certificate for SSTV ! http://www.qsl.net/py4zbz/arissat.htm#m 73 de Roland. ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-12 Reception Certificates
The folks behind issuing the ARISSat-1 reception report certificates ARE hard at work - even on a Sunday! - getting them sent out: I just received one! If you haven;t received yours yet, it is coming! Clint Bradford, K6LCS ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 Certificate requests--
All, The requests are being answered systematically. The requests by those not in North America are being addressed by another group of volunteers because of the quantity. Be patient. Please send your reports to the proper engineering team-- We just give out certificates so please do not duplicate. Enjoy the bird while it lasts and don't forget to donate at the AMSAT website for future funding of satellites...and your enjoyment. 73, Dee, NB2F One of the Certificate Team members. ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 CW and BPSK-1000 telemetry heard over Vietnam
Hello everyone, This morning I had a good pass of ARISSat-1 over Hanoi, Vietnam and decoded its BPSK-1000 for the first time. According to ARISSatTLM, more than 30 frames were sent to the server out of more than 60 decoded. Manually tuning the CW signal to keep it within range is fun and it was audible until the satellite was 1.5 degree under the horizon. Maybe next time I'll try the transponder :) 73, Thu XV9AA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 Pass Over DO33 2011-08-31
The FM telemetry downlink was initially acquired at 0014 UTC with the end of the SSTV transmission. The signal was barely audible. Transmission resumed at 0016 with S9+ strength, no noise, and the following details: - ID - Greeting in English - Secret word - MET = 45 minutes - IHU temp. = +31 degrees C - Control panel temp. = +31 degrees C - Battery voltage = 35.70 V - Battery current = -24 mA The CW beacon was not heard. 73s Bernhard VA6BMJ @ DO33FL ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat RF and audio recordings
Hi, Very good quality recordings of ARISSAT1 wide band RF signals are available on AMSAT telemetry directory. http://www.amsat.org/amsat/ftp/telemetry/arissat/recordings/ However, the server downloads are very slow probably due to a limited bandwidth. Laurent, F6FVY managed to upload the three files on a ten times faster server. http://dl.free.fr/kMOKtIsK2 http://dl.free.fr/n5dpN5JJx http://dl.free.fr/jXbL1U3Dz These RF stereo audio wav files may be played back and demodulated using any SDR software like HDSDR. AMSAT-DK made available BPSK telemetry audio files already demodulated that may be decoded by ARISSatTLM program. http://www.amsat.dk/oz7sat/sched.php?gs=oz1ktesat=ARISSAT-1status=All These audio files are sampled at48 kHz and include CW andBPSK1000 designed by Phil KA9Q (http://www.ka9q.net/bpsk1000.html). 73 de Bernard, f6bvp ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 battery
Hi all. The ARISSat team seem to have reached the conclusion that the Silver Zinc battery technology is not really suited for an orbiting satellite with a 55 / 35 minute charge and discharge cycle. I wonder if a couple of small Lithium polymer battery packs would be a suitable replacement for ARISSat-2 ? I note that there are safety issues with Li-ion technology, but there are some small battery packs of 10Whr / 20Whr 30Whr modules which have NASA approval for manned space flight. From the odd snippet of information on the power required during eclipse (is it 7 Watts for 35 minutes) it looks like 20-25% depth of discharge for the 20Whr battery pack. That's probably OK for a 9 month mission ?? Thanks David G0MRF http://www.clyde-space.com/documents/1902 ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSAT-1 TLM Problem
Hi all .. I am receiving the CW and TLM ok signal wise .. I tune in the CW to the mark in the CW / BPSK window.. But I don't ever receive any telemetry .. Using USB, FT897D .. I use the rig and computer for BPSK31 all the time .. Any ideas or suggestions ?? I even watched the You tube Video that was posted .. It seems like I am doing it correctly .. but must be missing something .. Thanks.. Randy - N2CUA ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat transponder
At the 1850z pass, ARISSat passed at approximately 20 degrees for me. I hadn't tried the SSB transponder in a while, and decided to give it a go. Once I found my downlink, it was loud and clear throughout most of the past. Called CQ for several minutes, but no takers. Those who haven't tried it, really should. 73 de Sebastian, W4AS ___ Sent via AMSAT-BB@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
[amsat-bb] ArisSat-1 UK pass over UK
Very clear pass overhead in the UK (28-08 20.10 UTC): MET: 54 minutes IHU: 33 deg C Control Panel: 38 deg C Batt Volt: 36.03V Batt Current: -8mA Dominic G6NQO ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 transponder LAST NIGHT OVER UK
rpt 5/7 sig last night via the transponder called cq a few times heard a EA station that was weak but didnt manage to work him.Its not easy to work but possable. 2E1EUB ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1 Pass Over DO33 2011-08-28
No CW beacon was heard. FM downlink was acquired at 0312 UTC with at least S7 and no fading but some noise. MET = 49 minutes IHU temp = +39 degrees C (not sure about final integer due to noise) Control panel temp = +28 degrees C Battery voltage = 35.70 Volts Battery current = -12 mA Transmission stopped at 0313 and resumed at 0315 with ID and greeting. 73s Bernhard VA6BMJ @ DO33FL ___ Sent via AMSAT-BB@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
[amsat-bb] ARISSat-1
I was having a really good pass gpong from my NW-SE and I had copied 6 frames of Telemetry and 5 frames of KURSK data when the bird just went silent. It never came back during this pass. It was the 08-27-2011 0241 UTC pass over Lake Erie. I am curious if anyone has heard it since than. That is probably the best I have copied it since day one. The frames where forwarded. The MET was 55' 33. Bat Voltage = 35.668; Bat Current = -16 ma. I've never heard it just go silent like that and not come back up. Carl W8KRF ___ Sent via AMSAT-BB@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
[amsat-bb] Arissat-1 signal
Is it just me, or was the last pass over Europe (orbit # 333) very weak? Barely heard it at all, before I have been getting S9 +60dB signals Pete Mi0VAX ___ Sent via AMSAT-BB@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
