April 2008 - AMSAT-BB - mailman.amsat.org

Call for Papers--2007 ARRL/TAPR Digital Communications Conference
by Ford, Steve, WB8IMY 16 Jul '12

16 Jul '12

Technical papers are solicited for presentation at the 26th Annual ARRL and TAPR Digital Communications Conference to be held September 28-30, 2007 in Hartford, Connecticut. These papers will also be published in the Conference Proceedings (you do NOT need to attend the conference to have your paper included in the Proceedings). The submission deadline is July 31, 2007. Please send papers to: Maty Weinberg ARRL 225 Main St Newington, CT 06111 or you can make your submission via e-mail to: maty(a)arrl.org Papers will be published exactly as submitted and authors will retain all rights. 73 . . . Steve, WB8IMY ARRL

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AO-16 Update and brief mode change
by Mark L. Hammond 02 Sep '08

02 Sep '08

Hello All, AO-16 has been in its "voice mode" continuously for nearly a month now. Many thanks to all the users of this "new" bird! It is time to pause voice operations long to receive some MBL telemetry (limited as it is, it's all we have). Around 0920 UTC on 17FEB08 I plan to return AO-16 to digital mode in order to receive some telemetry. If all goes as planned, it should be back to "voice mode" during the same pass. If not, I'll try to catch it on the 1056 UTC pass. Most of you will be asleep, so I don't think it will interfere with too many contacts. Looking to the future, we can see that after several months of continuous illumination, AO-16 will begin to experience eclipse periods at the end of March. The eclipse periods will increase and extend through the summer. This may impact AO-16's power budget such that the transmitter output will have to be reduced in order to protect its 18 year old batteries. We'll know more after the eclipse periods begin in late March and early April. In the meanwhile, enjoy AO-16 and her strong signals! 73 on behalf of the command team, Mark L. Hammond [N8MH]

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Santa docks at the ISS
by Ed Tump 25 Aug '08

25 Aug '08

Happy holidays! I got a kick out of this video: http://youtube.com/watch?v=_Di8mZLu0VE <http://youtube.com/watch?v=_Di8mZLu0VE&feature=PlayList&p=26B9B2ACB4AAC849& index=7> &feature=PlayList&p=26B9B2ACB4AAC849&index=7 Maybe he dropped off some more amateur radio gifts. 73, Ed KC9GWK Grid EN52 AmSat Member

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Yaesu G500 bearings, KLM antennas
by KYLE YOKSH 07 May '08

07 May '08

Hello, I've got a KR-500 and G500a rotor that need a good servicing. I've found a lot of great info in the archives that will help me, but still have a few questions.. I've read that the original bearings were steel, and begin to rust almost immediately after installation. Can anyone suggest a better quality bearing, and perhaps a source and part number? I've also read that the bearing cages are subject to failure, and some folks prefer to ditch them altogether. I'm also curious if anyone has any suggestions to optimize my old KLM crossed yagis? I use a KLM 2m14c and 43518c, and they seem to work fairly well, but are not exactly top performers. I've never opened the polarization switcher units on either antenna, but suppose I might want to clean the relay contacts? Since my tower must be tilted over to service the rotator and antennas, I'd like to get several years of service out of this gear. Thank you for any help. 73, Kyle K0KN

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RF connectors in 736R
by n1jez＠burlingtontelecom.net 02 May '08

02 May '08

Howdy, A while ago I seem to remember a discussion on availability of the small push on RF connectors used inside the FT-736R to interconnect boards. These same connectors are used in quite a few radios. They were a crimp on style. Anyone remember the source? Tnx 73, Mike N1JEZ AMSAT #29649 "A closed mouth gathers no feet"

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help tuning AO-16
by W0DXZ＠aol.com 01 May '08

01 May '08

I have a lot of trouble tuning in stations on AO-16,,, strong sigs, but i just haven't got the knack of it,,, I put the receiver on USB,,, even the most minor adjustments dont do it... any hints? All sounds like you are listening to SSB on an AM radio... by the time I get a station tuned in, they are gone 73 Bob W0DXZ **************Need a new ride? Check out the largest site for U.S. used car listings at AOL Autos. (http://autos.aol.com/used?NCID=aolcmp00300000002851)

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SEEDS reception...
by Mark Vandewettering 01 May '08

01 May '08

Well, I didn't get anything from Delfi C3 on its first pass over the West Coast, but I had heard that some people managed to get some signals from some of the other cubesats, so I set up for SEEDS on the low, second pass. Maximum elevation was only 9 degrees, and I recorded the pass with my FT-817 and a little voice recorder, tuning the doppler by hand. My morse skills are feeble, but even I could pick out the SEEDS in the telemetry stream. Audio is here: http://brainwagon.com/images/seeds.mp3 Congrats to all the teams! Mark

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AMSAT goes to the races -- photos
by Tom Clark, K3IO 01 May '08

01 May '08

This past weekend, W2GPS, WA4SXM and I attended the premier of AMSAT.ORG in Grand-Am Racing at the Virginia International Raceway (VIR). As reported earlier, Jim Jaeger (K8RQ) arranged for the AMSAT logo to appear prominently on the yellow Doran Racing Kodak #77 Dallara/Ford car driven by Brad Jaeger (Jim's son) and Memo Gidley. The Doran Racing web site has a gallery of photos featuring their #77 Kodak & #47 BSi cars available for viewing at http://www.doranracing.com/08_vir/photo.htm. The VIR race can be seen this coming Saturday on the cable SPEED CHANNEL from noon to 3PM EDT (16:00-19:00 UTC). AMSAT's logo will again be flying this coming weekend at the Laguna Seca track in California (see http://www.grand-am.com/rolex/schedule/event.cfm?eid=10). Rick and I have HUNDREDS of additional photos of the AMSAT car in action which we will post soon for your enjoyment. You will be able to see (a large photo of) the car in the AMSAT booth at Dayton. 73, Tom

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COMPASS or Cute ?
by Henk, PA3GUO 30 Apr '08

30 Apr '08

... interesting: Maybe I have mixed up COMPASS and Cute 1.7 ? I believed this was Cute, but now I start to believe this was in fact COMPASS: http://home.vianetworks.nl/users/hamoen/pa3guo/cute_17_pa3guo_29apr08_1820u… .. which means that what I thought was COMPASS was in fact Cute, and that the CW from Cute is good and COMPASS not. Ahhh ...: to many satellites flying by at the same time at the same frequency to confusing for me - trying to jump from one to the next sat :-)) Henk - PA3GUO

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Re: Fresh Delfi-C3 Kepler & Nova!!!
by Cor 30 Apr '08

30 Apr '08

Hello All, In my previous messages all sentences were together. Here are fresh keps (30-April2008) in a delfiC3.txt file: http://pd0rkc.ontwikkel.nl/DELFIC3/delfiC3.txt New keps are also on the DelfiC3 website. http://www.delfic3.nl/index.php?option=com_content&task=view&id=93&Itemid=1… 73's Cor PD0RKC Ham Radio In Space: http://iss.ontwikkel.nl

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COMPASS 2155UTC
by Mike Rupprecht 30 Apr '08

30 Apr '08

April 30, 2155UTC 00 COMPASS B3140100A41300210100B307FF 73, Mike DK3WN

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Fresh Delfi-C3 Kepler & Nova!!!
by Cor 30 Apr '08

30 Apr '08

Hello All,In a previos posting W8GUS mentioned he could not findDelfi-C3 in celestrak keps.That is correct I also could not find it after update.In the beginning (after DelfiC3 launch) I took the keps from the Delfi-C3 websiteand putted in an text file, and loaded manualy in my trackings software butThese where not accurate anymore.Earlier this evening I have spoken PE4WJ (DelfiC3 team) and he sended mefresh keps which was accurate (i checked AOS and previous pass.Put these two lines in a word txt file:Delfi-C31 32787U 08021E 08121.22875607 .00000324 00000-0 48264-4 0 1312 32787 97.9932 181.2525 0014422 294.5581 65.4118 14.81396579 300 Loading manualy in Nova:Go to the Nova menu: Kep. Elements---->Disk file update--->Manual update fromfile----> Press on the big UPDATE button (with satellite image!).Now scroll to the .txt file.Find Delfi-C3 in nova:Go to the Nova menu: Configure current view---> Satellites.See the little window left (below).Click on Artificial satellites.Now search Delfi-C3 on the left window (up).Drag Delfi-C3 to the right window and press on the OK button.Tip!!!! print this mail on a paper!73's Cor PD0RKCHam Radio In Space: http://iss.ontwikkel.nl

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COMPASS telemetry
by Mike Rupprecht 30 Apr '08

30 Apr '08

Apr 30, 2018 UTC compass 63140100a41300210100b20702 good signal strength but bad modulation (sounds like low batteries) 73, Mike DK3WN

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DelfiC3, Cute and Compass-1 20:12UTC pass
by Rob Hardenberg PE1ITR 30 Apr '08

30 Apr '08

Report good signals on: Delfic3 145.930, Cute 437.275 and Compass-1 437.275MHz (little higher freq than cute). 20080430 20:12 ~ 20:24 pass I made some nice recordings of cute and compass. After analyzing the files I pass the telemetry to ground stations. 73 Rob PE1ITR http://www.pe1itr.com

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Dish Controller Project Solicitation?
by Robert Bruninga 30 Apr '08

30 Apr '08

We are looking for someone to design a microcontroller for our Naval Academy 40 foot dish. The controller will be a small rack mount box with serial input port suitible for taking AZ/EL commands from any of the popular Tracking Programs. The output is an analog voltage from +/- 10 volts to drive the 75 HP hydraulic system as a closed loop PID controller. There are a few other discrete TTL signals involved to get the hydraulics running and to handshake with the various interlocks. The device will have front panel LCD readouts and buttons. See the web page where I am assembling ideas: http://www.ew.usna.edu/~bruninga/12m-dish.html There will be two such boxes. One at the dish and the other almost a mile away at the control station. One is the controller and the other is just a remote display. They are connected by a serial port operating at 9600 baud with the remote one also connected to whatever tracking program is controlling... This dish is an X/Y dish and not AZ/EL (X goes East and West, and Y goes North and South), but a few trig conversions can easily manipulate between the two. The optical shaft encoders are 16 bit+ and operate at 9600 baud serial also but at RS422 levels. We have been using the one I built 10 years ago that I programmed in Qbasic and runs on a PC104 bus DOS card. All of the TTL level interfaces are there... But I just don't have the time or patience any more to do this again... So we are going to contract it out. This will be a full blown Government procurement with all the overhead and other baggage. So only serious respondents should consider this. We have not yet written a formal spec, or procurment package. But this is just a heads up that we will be putting this together soon, since this must be completed this summer. Nothing in this email or web page in any way obligates the government to proceed with this project. It is just a way of getting out the word that we are looking for a solution to replacing our aging controller. Bob Bruninga US Naval Academy Satellite Lab

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CubeSats TLE number
by Mineo Wakita 30 Apr '08

30 Apr '08

Decision by Spase-Track and Using by each satellites GS: 32783 OBJECT A = CANTROSAT-2A 32784 OBJECT B = ? 32785 OBJECT C = ? 32786 OBJECT D = ? 32787 OBJECT E = DELFI-C3 32788 OBJECT F = ? 32789 OBJECT G = SEEDS 32790 OBJECT H = ? 32791 OBJECT J = CUTE-1.7+APDII 32792 OBJECT K = RUBIN 8/PSLV

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Re: Cute1 telemetry
by Henk, PA3GUO 30 Apr '08

30 Apr '08

Hi Alan, Here's the link to the project team for reports. I have submitted my report today, but haven't heared back from them yet (unfortunately). Hope it was useful. http://lss.mes.titech.ac.jp/ssp/cute1.7/ireceived_e.html Henk http://www.qsl.net/pa3guo ------------------------------------------------- I copied some CW from Cute 1 but it was not obvious where to send it so I will post it here. Hope that helps Alan ZL2BX

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Re: Cute-1.7+APDII over West Malaysia
by Henk, PA3GUO 30 Apr '08

30 Apr '08

Hi Sion, You have a much better (audio) signal as I get here in Europe: http://home.vianetworks.nl/users/hamoen/pa3guo/cute_17_pa3guo_30apr08_0920u… http://home.vianetworks.nl/users/hamoen/pa3guo/cute_17_pa3guo_29apr08_1820u… It sounds very, well, wobbely ? (new word, just invented by me :-)) You recording is much more normal. I used std CW mode, what did you use ? The other satellite is most likely COMPASS, which is on the same frequency. I hear it during the same pass few Khz lower, but that can be due to doppler differences. COMPASS has here 'normal' CW sounding. I did submit this report also to the Cute 1.7 team, but havent heared back from them yet. Henk, PA3GUO http://www.qsl.net/pa3guo -------------------------------------------------------------- Dear All, Here is an MP3 recording of Cute-1.7+APDII over West Malaysia. Satellite was tracked using Object - J and maximum elevation was 10 degree. Time was 2132 Local or 1332 UTC. The MP3 recording is unedited as I am copying this remotely via VNC/Teamspeak. I think I heard another satellite transmitting towards the end of the pass on top of Cute-1.7 + APDII. Sion Chow Q. C., 9W2QC.

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Re: Delfi Question
by John Marranca, Jr 30 Apr '08

30 Apr '08

Rod: Go to C:\Program Files\Orbitron\tle\amateur.txt and add these TLE's: DELFI-C3 1 32783U 08021A 08119.33805163 .00165610 00000-0 23146-1 0 23 2 32783 097.9217 179.2401 0029749 230.8058 129.0516 14.76344380 27 Restart Orbitron. Delfi-C3 will appear in your satellite list. Good Luck! John KB2HSH -- _______________________________ John Marranca, Jr PBX Technician/Shop Steward CWA Local 1122 BN Systems, Inc Orchard Park, NY (716)972-2006

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Re: Cute-1.7+APDII over West Malaysia
by Sion Chow Q. C. (9W2QC) 30 Apr '08

30 Apr '08

Dear All, Here is another recording during the 2307 Local or 1507 UTC pass, 30 degree elevation. Using Object-J again, and MP3 recording is again unedited as I was out of the shack operating remotely. Sorry for not posting this earlier, but I had Internet problems, which thankfully happened about 5 minutes after LOS. http://www.9w2qc.net/amsatbb/cute30apr2307.mp3 73, Sion Chow Q. C., 9W2QC. From: Sion Chow Q. C. (9W2QC) [mailto:9w2qc@9w2qc.net] Sent: Wednesday, April 30, 2008 10:22 PM To: 'amsat-bb(a)amsat.org' Cc: 'hiroki(a)lss.mes.titech.ac.jp'; 'Sangat Singh' Subject: Cute-1.7+APDII over West Malaysia Dear All, Here is an MP3 recording of Cute-1.7+APDII over West Malaysia. Satellite was tracked using Object - J and maximum elevation was 10 degree. Time was 2132 Local or 1332 UTC. http://www.9w2qc.net/amsatbb/cute30apr0932.mp3 The MP3 recording is unedited as I am copying this remotely via VNC/Teamspeak. I think I heard another satellite transmitting towards the end of the pass on top of Cute-1.7 + APDII. 73, Sion Chow Q. C., 9W2QC.

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Satellite Frequency Control
by RFI-EMI-GUY 30 Apr '08

30 Apr '08

Sounds like a good idea! I was at SVHFS last week and there was a lot of discussion and design effort toward GPS derived frequency control for EME and microwave roamers. -- Joe Leikhim K4SAT "The RFI-EMI-GUY"© "Treason doth never prosper: what's the reason? For if it prosper, none dare call it treason." "Follow The Money" ;-P

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Delfi-C3 Not Heard In Northern CA
by Bill Ress 30 Apr '08

30 Apr '08

Delfi-C3 wasn't heard from during today's 1725Z and 1858Z passes over Northern CA. Anyone have different results?? Regards...Bill - N6GHz

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Delfi-C3 status update 30 April 2008 08:00 UTC
by Wouter Jan Ubbels 30 Apr '08

30 Apr '08

Hi all, Delfi-C3 is in orbit and healthy, despite some minor issues, please find a status update below: 1. Telemetry indicates that all solar panels and antennas have deployed properly 2. Telemetry indicates nominal values for all housekeeping values 3. We have already obtained payload data, and have been able to generate IV curves of the Thin Film Solar Cell experiment, note that those uring RASCAL can view the IV curves by clicking Options-->show IV curves in RASCAL. 4. The spacecraft is operating in science mode, we have had one orbit in emergency mode, which was most probably due to a databus issue 5. Up till now we have received 7000+ (!) frames from amateurs using RASCAL around the globe, amazing, thank you all so much!! 6. We have verified command uplink functionality yesterday, and were able to command the spacecraft today on the low elevation (4.9max) pass over our GS at 0737UTC 7. The spacecraft has decided to consistently use the backup radio on 145.930MHz for its telemetry downlink, we were able to request a full on-board database dump while in range of our groundstation yesterday and analysis of the database confirms this. We currently have a good understanding why this is the case. We will try to switch downlinks to the primary radio on 145.870MHz during the next good pass over our GS, so amateurs in Western Europe might want to check that frequency also and might experience intermittent telemetry while we are commanding. Note that we suspect that the TX frequency could be 1 to 2 kHz lower on this radio, so tuning around slowly is the best strategy. 8. The spacecraft seems to have an issue with the downlink TX switching off into the orbit, which is the reason while Delfi-C3 has not been heard on most descending passes over VK/ZL, we think we have a good understanding of why it is. The TX itself is fine, but it switches off automatically when it does not get data from the OBC for a certain amount of time. We are working on resolving this issue. This also happened during the pass over our GS at 0737 UTC but we were able to command it back on. For those in Western Europe we would like to ask to keep tracking Delfi-C3 even if you can not hear it at first, as we will try to turn the TX back on as soon as we notice that it has been turned off. 9. Thank you all for your observations on the spin rate, these are really helpful! We currently think that the spacecraft is tumbling with approx 10deg/second, which corresponds to a 36 second period. Since the s/c downlink antenna is almost truely circular, polarization sense can change from RHCP to LHCP completely depending on s/c orientation, we use circular antennas on our GS as well, and when we switch to the opposite polarizaiton sense the signal is wiped out completely, switching back gives solid copy with strong sigs. 10. NORAD object E #32787 seems to match best thanks for all your observations and efforts so far! 73 on behalf of the Delfi-C3 team, Wouter Jan Ubbels

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Re: Delfi-C3 status update -THANK YOU!!!
by Stefan Wagener 30 Apr '08

30 Apr '08

Thanks! What a great example of keeping the community informed. By providing us with a very interesting satellite, a nice software tool, access to data and the opportunity to share in your experiences your team has done a tremendous job for the satellite amateur radio community and the promotion of our hobby and interests. Thank you and please keep it up. I am looking forward to tonight catching more telemetry. :-) 73, Stefan VE4NSA > Date: Wed, 30 Apr 2008 10:16:58 +0200> From: wjubbels(a)gmail.com> To: amsat-bb(a)amsat.org> CC: rascal(a)delfic3.nl> Subject: [amsat-bb] Delfi-C3 status update 30 April 2008 08:00 UTC> > Hi all,> > Delfi-C3 is in orbit and healthy, despite some minor issues, please find a> status update below:> > 1. Telemetry indicates that all solar panels and antennas have deployed> properly> > 2. Telemetry indicates nominal values for all housekeeping values> > 3. We have already obtained payload data, and have been able to generate IV> curves of the Thin Film Solar Cell experiment, note that those uring> RASCAL can view the IV curves by clicking Options-->show IV curves in> RASCAL.> > 4. The spacecraft is operating in science mode, we have had one orbit in> emergency mode, which was most probably due to a databus issue> > 5. Up till now we have received 7000+ (!) frames from amateurs using RASCAL> around the globe, amazing, thank you all so much!!> > 6. We have verified command uplink functionality yesterday, and were able to> command the spacecraft today on the low elevation (4.9max) pass over our GS> at 0737UTC> > 7. The spacecraft has decided to consistently use the backup radio on> 145.930MHz for its telemetry downlink, we were able to request a full> on-board database dump while in range of our groundstation yesterday and> analysis of the database confirms this. We currently have a good> understanding why this is the case. We will try to switch downlinks to the> primary radio on 145.870MHz during the next good pass over our GS, so> amateurs in Western Europe might want to check that frequency also and might> experience intermittent telemetry while we are commanding. Note that we> suspect that the TX frequency could be 1 to 2 kHz lower on this radio, so> tuning around slowly is the best strategy.> > 8. The spacecraft seems to have an issue with the downlink TX switching off> into the orbit, which is the reason while Delfi-C3 has not been heard on> most descending passes over VK/ZL, we think we have a good understanding of> why it is. The TX itself is fine, but it switches off automatically when it> does not get data from the OBC for a certain amount of time. We are working> on resolving this issue. This also happened during the pass over our GS at> 0737 UTC but we were able to command it back on. For those in Western Europe> we would like to ask to keep tracking Delfi-C3 even if you can not hear it> at first, as we will try to turn the TX back on as soon as we notice that it> has been turned off.> > 9. Thank you all for your observations on the spin rate, these are really> helpful! We currently think that the spacecraft is tumbling with approx> 10deg/second, which corresponds to a 36 second period. Since the s/c> downlink antenna is almost truely circular, polarization sense can change> from RHCP to LHCP completely depending on s/c orientation, we use circular> antennas on our GS as well, and when we switch to the opposite polarizaiton> sense the signal is wiped out completely, switching back gives solid copy> with strong sigs.> > 10. NORAD object E #32787 seems to match best> > > thanks for all your observations and efforts so far!> > 73 on behalf of the Delfi-C3 team,> > Wouter Jan Ubbels> _______________________________________________> 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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Delphi Elements Download Help
by Ronald Long 30 Apr '08

30 Apr '08

PE4WJ wrote: >Furthermore, Delfi-C3 is now listed on celestrack with identifier DELFI-C3 , >as object #32787, these TLE's are also on our mission ops page. I am using Nova download from celestrak but do not find Delphi-C3. In the download setup I have selected NORAD/elements and stations, amateur, visual, science, engineering and other categories. What am I doing wrong? ron w8gus

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Delfi-C3 RASCAL tuning & TLE's
by Wouter Jan Ubbels 30 Apr '08

30 Apr '08

Hi all, we have added a section to our RASCAL tuning guide in order to make achieving sync in RASCAL easier, see http://www.delfic3.nl/index.php?option=com_content&task=view&id=94&Itemid=1… I have also included it in this mail for clarity: Tuning can sometimes be difficult, in the presence of Doppler shift, fading due to polarization changes, frequency offset due to temperature of the spacecraft oscillators and there is the possibility that the Costas Loop indicates a false sync because of lock on one of the signal's sidebands. If possible, you can use a waterfall display in software like MixW running parallel to RASCAL which will give you an indication of the centerfrequency. During transmission of AX.25 flags, the actual carrier frequency is the highest peak in the spectrum, with a couple of sidebands exactly 150Hz apart, looks like a comb. Now, using the waterfall display, tune such that this highest peak corresponds to 1600Hz +/-100Hz, in order to achieve sync. Furthermore, Delfi-C3 is now listed on celestrack with identifier DELFI-C3 , as object #32787, these TLE's are also on our mission ops page. Today we also verified that our backup command receiver functions well, we are still working on the TX drop out issue. 73 on behalf of the Delfi-C3 team, Wouter Jan Ubbels PE4WJ

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Satellite Frequency Control
by David Barber 30 Apr '08

30 Apr '08

Perhaps this is a really stupid question? The deviation from the intended frequency of operation of a satellite is often mentioned here therefore would it not be possible to lock the frequency of the payload to a GPS derived source? I appreciate this may not be practical on Cubesats but for longer life products? Comments...

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DELFI C 3
by Luc Leblanc 30 Apr '08

30 Apr '08

Nothing heard on the 1405Z south bound pass on 145.930 Mhz "-" Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe WAC BASIC CW PHONE SATELLITE

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Cute-1.7+APDII over West Malaysia
by Sion Chow Q. C. (9W2QC) 30 Apr '08

30 Apr '08

Dear All, Here is an MP3 recording of Cute-1.7+APDII over West Malaysia. Satellite was tracked using Object - J and maximum elevation was 10 degree. Time was 2132 Local or 1332 UTC. http://www.9w2qc.net/amsatbb/cute30apr0932.mp3 The MP3 recording is unedited as I am copying this remotely via VNC/Teamspeak. I think I heard another satellite transmitting towards the end of the pass on top of Cute-1.7 + APDII. 73, Sion Chow Q. C., 9W2QC.

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Re: Delfi-C3 status update 30 April 2008 08:00 UTC
by Robert Turlington 30 Apr '08

30 Apr '08

Hi All a good pass of delfi at 1150 utc got 50 packets decoded the beacon was switching on and off every 60secs or so starting at 1155-30 secs approx finally switched off at1200-20secs or there aboutsRegards Robert G8ATE > Date: Wed, 30 Apr 2008 10:16:58 +0200> From: wjubbels(a)gmail.com> To: amsat-bb(a)amsat.org> CC: rascal(a)delfic3.nl> Subject: [amsat-bb] Delfi-C3 status update 30 April 2008 08:00 UTC> > Hi all,> > Delfi-C3 is in orbit and healthy, despite some minor issues, please find a> status update below:> > 1. Telemetry indicates that all solar panels and antennas have deployed> properly> > 2. Telemetry indicates nominal values for all housekeeping values> > 3. We have already obtained payload data, and have been able to generate IV> curves of the Thin Film Solar Cell experiment, note that those uring> RASCAL can view the IV curves by clicking Options-->show IV curves in> RASCAL.> > 4. The spacecraft is operating in science mode, we have had one orbit in> emergency mode, which was most probably due to a databus issue> > 5. Up till now we have received 7000+ (!) frames from amateurs using RASCAL> around the globe, amazing, thank you all so much!!> > 6. We have verified command uplink functionality yesterday, and were able to> command the spacecraft today on the low elevation (4.9max) pass over our GS> at 0737UTC> > 7. The spacecraft has decided to consistently use the backup radio on> 145.930MHz for its telemetry downlink, we were able to request a full> on-board database dump while in range of our groundstation yesterday and> analysis of the database confirms this. We currently have a good> understanding why this is the case. We will try to switch downlinks to the> primary radio on 145.870MHz during the next good pass over our GS, so> amateurs in Western Europe might want to check that frequency also and might> experience intermittent telemetry while we are commanding. Note that we> suspect that the TX frequency could be 1 to 2 kHz lower on this radio, so> tuning around slowly is the best strategy.> > 8. The spacecraft seems to have an issue with the downlink TX switching off> into the orbit, which is the reason while Delfi-C3 has not been heard on> most descending passes over VK/ZL, we think we have a good understanding of> why it is. The TX itself is fine, but it switches off automatically when it> does not get data from the OBC for a certain amount of time. We are working> on resolving this issue. This also happened during the pass over our GS at> 0737 UTC but we were able to command it back on. For those in Western Europe> we would like to ask to keep tracking Delfi-C3 even if you can not hear it> at first, as we will try to turn the TX back on as soon as we notice that it> has been turned off.> > 9. Thank you all for your observations on the spin rate, these are really> helpful! We currently think that the spacecraft is tumbling with approx> 10deg/second, which corresponds to a 36 second period. Since the s/c> downlink antenna is almost truely circular, polarization sense can change> from RHCP to LHCP completely depending on s/c orientation, we use circular> antennas on our GS as well, and when we switch to the opposite polarizaiton> sense the signal is wiped out completely, switching back gives solid copy> with strong sigs.> > 10. NORAD object E #32787 seems to match best> > > thanks for all your observations and efforts so far!> > 73 on behalf of the Delfi-C3 team,> > Wouter Jan Ubbels> _______________________________________________> 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 _________________________________________________________________ Search and win with BigSnapSearch.com http://www.bigsnapsearch.com

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Cute1 telemetry
by Alan Cresswell 30 Apr '08

30 Apr '08

Hiroki, I copied some CW from Cute 1 but it was not obvious where to send it so I will post it here. 1006UT CUTE 87 CB A7 69 3C 2D 29 AC 4F 26 17 1008UT CUTE 87 CA A7 69 3C 2D 29 AC ?C 29 17 1012UT (Fade) 8 CB A5 69 3C 2C 2A AC 51 2E 17 1014UT CUTE 86 C6 A5 68 3C 2C 29 A.. (LOS) Hope that helps Alan ZL2BX

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Re: Delfi-C3 status update 30 April 2008 08:00 UTC
by Robert Turlington 30 Apr '08

30 Apr '08

Hi All I heard Delfi-c3 for about a minute ,only ,at about 0916utc this morning on 145.930+/- doppler last evening it also switched off halfway through its obit just after 2000utc using a pointable 6el horiz quad and doppler tuned ft8476 in io92jp Regards Robert G8ATE > Date: Wed, 30 Apr 2008 10:16:58 +0200 > From: wjubbels(a)gmail.com > To: amsat-bb(a)amsat.org > CC: rascal(a)delfic3.nl > Subject: [amsat-bb] Delfi-C3 status update 30 April 2008 08:00 UTC > > Hi all, > > Delfi-C3 is in orbit and healthy, despite some minor issues, please find a > status update below: > > 1. Telemetry indicates that all solar panels and antennas have deployed > properly > > 2. Telemetry indicates nominal values for all housekeeping values > > 3. We have already obtained payload data, and have been able to generate IV > curves of the Thin Film Solar Cell experiment, note that those uring > RASCAL can view the IV curves by clicking Options-->show IV curves in > RASCAL. > > 4. The spacecraft is operating in science mode, we have had one orbit in > emergency mode, which was most probably due to a databus issue > > 5. Up till now we have received 7000+ (!) frames from amateurs using RASCAL > around the globe, amazing, thank you all so much!! > > 6. We have verified command uplink functionality yesterday, and were able to > command the spacecraft today on the low elevation (4.9max) pass over our GS > at 0737UTC > > 7. The spacecraft has decided to consistently use the backup radio on > 145.930MHz for its telemetry downlink, we were able to request a full > on-board database dump while in range of our groundstation yesterday and > analysis of the database confirms this. We currently have a good > understanding why this is the case. We will try to switch downlinks to the > primary radio on 145.870MHz during the next good pass over our GS, so > amateurs in Western Europe might want to check that frequency also and might > experience intermittent telemetry while we are commanding. Note that we > suspect that the TX frequency could be 1 to 2 kHz lower on this radio, so > tuning around slowly is the best strategy. > > 8. The spacecraft seems to have an issue with the downlink TX switching off > into the orbit, which is the reason while Delfi-C3 has not been heard on > most descending passes over VK/ZL, we think we have a good understanding of > why it is. The TX itself is fine, but it switches off automatically when it > does not get data from the OBC for a certain amount of time. We are working > on resolving this issue. This also happened during the pass over our GS at > 0737 UTC but we were able to command it back on. For those in Western Europe > we would like to ask to keep tracking Delfi-C3 even if you can not hear it > at first, as we will try to turn the TX back on as soon as we notice that it > has been turned off. > > 9. Thank you all for your observations on the spin rate, these are really > helpful! We currently think that the spacecraft is tumbling with approx > 10deg/second, which corresponds to a 36 second period. Since the s/c > downlink antenna is almost truely circular, polarization sense can change > from RHCP to LHCP completely depending on s/c orientation, we use circular > antennas on our GS as well, and when we switch to the opposite polarizaiton > sense the signal is wiped out completely, switching back gives solid copy > with strong sigs. > > 10. NORAD object E #32787 seems to match best > > > thanks for all your observations and efforts so far! > > 73 on behalf of the Delfi-C3 team, > > Wouter Jan Ubbels > _______________________________________________ > 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 _________________________________________________________________ Bag extra points with the Walkers Brit Trip Game http://www.walkersbrittrips.co.uk/game

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C3 heard at KM17VX
by Kostas Ioannidis 30 Apr '08

30 Apr '08

C3 heard at 9:25 at km17vx transmitting at 145.930MHz. It was not sending tlm . 73 de sw1ixp

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C3 heard at KM17VX
by Kostas Ioannidis 30 Apr '08

30 Apr '08

C3 heard over km17vx.Packets recieved and uploaded ok.At 7:50 utc transmission at 145.930 stopped. 73 de sw1ixp

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Jules Verne boosts ISS orbit
by uschndr＠zedat.fu-berlin.de 30 Apr '08

30 Apr '08

>From ESA Portal http://www.esa.int/esaCP/index.html 73, Udo,DL7OL ===================================================== ATV demonstrated its ability to raise orbit of ISS Jules Verne boosts ISS orbit 25 April 2008 ESA's Jules Verne ATV was used for the first time early this morning to raise the orbit of the International Space Station. A 740-second burn of the Automated Transfer Vehicle's main engines successfully lifted the altitude of the 280-tonne Station by around 4.5 km to a height of 342 km above the Earth's surface. After the ATV Control Centre (ATV-CC) in Toulouse, France, had 'woken up' Jules Verne ATV, the manoeuvre started at 06:22 CEST (04:22 GMT) this morning and provided a 2.65 m/s thrust using two of the ATV's four main engines. Controllers at ATV-CC closely monitored ATV's subsystems throughout the long manoeuvre. "The Station's altitude naturally decreases with atmospheric drag. Until now this has been compensated for by performing a re-boost using the Russian Progress, the Space Shuttle or by the ISS itself," explains Alberto Novelli, ESAs Mission Director at ATV-CC. "Today, ATV has successfully demonstrated that it too is able to perform this vital function. Only Progress and ATV can provide this high level of re-boost. ATV is unique due to the quantity of fuel available for such manoeuvres." The re-boost manoeuvre comes just three weeks after Jules Verne ATV successfully docked with ISS on 3 April 2008 delivering 1150 kg of dry cargo, including food, clothes and equipment, as well as additional supplies of water, oxygen and fuel. Since then, the European ISS resupply spacecraft has been in dormant mode attached to the docking port on the Russian Zvezda module. Today's re-boost sets up the International Space Station for the arrival of Space Shuttle Discovery on the STS-124 mission to deliver the Japanese Kibo laboratory. STS-124 is currently targeted for launch on 31 May 2008. Further re-boost manoeuvres using ATV are scheduled for 12 June, 8 July and 6 August. Jules Verne ATV is scheduled to remain docked to the International Space Station until early August. At the end of its mission, Jules Verne, loaded with up to 6.5 tonnes of material no longer required by the ISS, will undock and then burn up completely during a guided and controlled re-entry high over the Pacific Ocean.

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Delphi c3
by Alan Cresswell 30 Apr '08

30 Apr '08

Hi Once again nothing heard from Delphi over NZ on the 2041UT 36deg fully sunlit pass. Good signals from SEEDS, CUTE1.7 and even chirpy COMPASS. I note that stations reporting no signal today are all reporting on descending node passes while good signal reports are once again reporting on ascending node passes. Unless Delphi is turning off Southbound best guess would be an antenna squint effect. Are any stations reporting reception on Southbound passes? Alan ZL2BX

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Two CubeSats TLE decided
by Mineo Wakita 30 Apr '08

30 Apr '08

In Space-Track: 32783 OBJECT A = CARTSAT 2A 32792 OBJECT K = RUBIN 8/PSLV

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Delphi C3
by Alan Cresswell 30 Apr '08

30 Apr '08

Bram Well knock me down with a feather! Suddenly Delphi has burst into life in this part of the world! Strong signals during the entire 2217UT 20 Deg pass. LOS at 2217, 1deg within about 30 seconds of predicted. Seems to have been in its "emergency mode". Good sync but no packets decoded. I have a 68Mb wave file (manual Doppler on that pass) if required. Alan ZL2BX

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SEEDS and Delfi-C3 over West Malaysia
by Sion Chow Q. C. (9W2QC) 30 Apr '08

30 Apr '08

Dear All, Had another 57 degree pass of SEEDS and Delfi-C3 over West Malaysia at 1055 hours local or 0255 hours UTC. Again, I was tracking object C, but SEEDS was heard for about 2 minutes more after LOS. This time, unfortunately nothing was heard from Delfi-C3 on 145.870 MHz +/- and 145.930 MHz +/-. SEEDS was very strong though, with occasional QSB. Attempted to try to listen to Cute-1.7+APDII, COMPASS-1 and AAUSAT-II but unfortunately did not hear any signals. The MP3 recording of SEEDS will be posted shortly. Equipment used this time were VHF - IC910H, 2x10 H-Yagi, SB-2000 Preamp and UHF - FT-847, 2x15 H-Yagi, SB-7000 Preamp. 73, Sion Chow Q. C., 9W2QC.

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Emergency in Cute-1.7
by Hiroki Ashida 30 Apr '08

30 Apr '08

Hello All, I'd like to inform you about the current status of our satellite, Cute-1.7 + APD II. There has been some strange behaviours on Cute that the battery voltage is very low in the FM packet though it is nominal value in the CW frame. The level of the voltage from FM packet indicates that our satellite may be in danger. We've been investigating the problem but informations we have are very small, so I'd like to appeal for your kind cooperation. Our satellite transmits its beacon at 437.275MHz by CW(Morse Code) and the beacon includes the battery voltage. Details are explained in the web-page: http://lss.mes.titech.ac.jp/ssp/cute1.7/cwtelemetry_e.html There's no FM telemetry transmission excpept over Japan but CW information is remakably helpful for us. If you have any questions, please don't hesitate to contact me. Best Regards, Hiroki Cute-1.7 + APD II -- Hiroki Ashida <hiroki(a)lss.mes.titech.ac.jp> Laboratory for Space Systems Department of Mechano-Aerospace Engineering Tokyo Institute of Technology TEL/FAX : +81-3-5734-2644 Room 554, Ishikawadai 1st Bldg, Tokyo Institute of Technology 2-12-1 O-okayama, Meguro-ku, Tokyo, Japan

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ao27.org possible schedule error?
by Sam KC2LRC 30 Apr '08

30 Apr '08

When setting up to work AO-27 yesterday I noticed that the schedule on ao27.org indicated it would be turning on later than normal, with the bird up in Canada. I went out to catch the pass a minute before the scheduled on time and found that the bird was already on. It switched to TLM within a minute and then turned off. Today I went out for the 2022 pass before my tracking program's indicated AOS. The bird was on as it rose and it stayed on for a good 6-7 mins before going to TLM. When I got back in after it turned off, ao27.org listed analog as the current mode, with over 5 minutes remaining. From what I see, the schedule on ao27.org seems to be 8-10 mins off from actual time. The bird doesn't seem to have changed schedule at all. Can anyone else confirm this? 73, Sam KC2LRC Syracuse, NY - FN13

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Seed Over CHILE Audio
by Raul Romero CA3SOC 30 Apr '08

30 Apr '08

----- Original Message ----- From: Raul Romero CA3SOC To: Amsat-Bb(a)Amsat.Org Sent: Tuesday, April 29, 2008 10:39 PM Subject: Seed Over CHILE Audio Rec in mid Pass Over Chile http://ce3soc.no-ip.org/ 080429_001.wav Rig Icom IC-PCR1500 5 Elem Hor Yagui 73 Raul CA3SOC --------------------------------------------------------------------- "Are you still wasting your time with spam?... There is a solution!" Protected by GIANT Company's Spam Inspector The most powerful anti-spam software available. http://mail.spaminspector.com

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Delfi-C3 not copy over PY land
by Fabio Teixeira Magalhaes 30 Apr '08

30 Apr '08

Hello >From 00:35 to 00:47 04/30/2008 - nothing heard from Delfi-3C over GH70un. 73 es DX Fabio - PY4AJ Amsat 19.748

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Seed Over CHILE Audio
by Raul Romero CA3SOC 30 Apr '08

30 Apr '08

Rec in mid Pass Over Chile http://ce3soc.no-ip.org/ 080429_001.wav Rig Icom IC-PCR1500 5 Elem Hor Yagui 73 Raul CA3SOC --------------------------------------------------------------------- "Are you still wasting your time with spam?... There is a solution!" Protected by GIANT Company's Spam Inspector The most powerful anti-spam software available. http://mail.spaminspector.com

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Delfi-c3 heard, packets printed!
by Mark L. Hammond 30 Apr '08

30 Apr '08

Finally got some packets tonight. 30April2008 0225 UTC from FM05pj, 145.930 MHz, LOUD when it came into the sunlight (S7). RASCAL recorded just shy of 100 packets. RASCAL is a neat piece of software! I also copied packets via the DSP-93/TNC in KISS mode. 73, Mark L. Hammond [N8MH]

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Delfi-C3 over West Malaysia
by Sion Chow Q. C. (9W2QC) 30 Apr '08

30 Apr '08

Dear All, Finally managed to copy Delfi-C3 during a 9 degree elevation pass this morning, 0922 local or 0122 UTC over West Malaysia. Unfortunately, I failed to log into the Delfi server for some reasons - have to check my login again. Also briefly heard SEEDS again on this pass, while Cute-1.7 + APDII was not heard. Is Cute-1.7+APDII continuously transmitting CW telemetry on 437.275 MHz? Captured telemetry are as below. A screenshot of RASCAL is available at http://www.9w2qc.net/amsatbb/delfi30apr0922.jpg from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 af 06 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 b0 06 96 84 eb ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 3f fb fb 57 77 00 01 01 09 00 00 00 00 3c 00 a0 83 4c 00 a8 0b 80 09 00 58 0d 40 5f 00 28 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 b3 06 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 b6 06 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 bb 06 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 bc 06 96 84 eb ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 3f fb fa 57 63 08 00 01 08 00 00 00 00 3d 00 a0 43 4c 00 a0 0b 80 12 00 84 0d c0 6d 00 78 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 bf 06 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 from: DLFIC3 to: TLM a8 98 9b 40 40 40 00 88 98 8c 92 86 66 01 03 f0 63 06 c0 06 96 84 eb ff 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ff 3f fa fa 58 6a 22 07 00 08 00 00 00 00 3d 00 a0 03 4c 00 38 09 40 12 00 6c 0d c0 63 00 60 07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 Tuning the downlink for Doppler is indeed not a simple process but luckily still manageable. Have another pass at 1055 local or 0255 UTC where I will attempt to copy again. Both SEEDS and Delfi-C3 were copied using Object C keps. Equipment used, IC-910H, 2x10 Yagi for VHF, 2x15 Yagi for UHF, SB-2000 VHF Preamp and SB-7000 UHF Preamp. All horizontally polarized. WAV or MP3 recording of Delfi-C3 also available on request. 73, Sion Chow Q. C., 9W2QC.

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Delfi-C3
by Alan Cresswell 30 Apr '08

30 Apr '08

It seems that most reports of good Delfi reception relate to northbound passes. So far it appears that Delfi has not been heard in VK/ZL during a number of Southbound sunlit passes despite a number of stations listening and good reception of SEEDS and Cute1.7. Could this be a spacecraft orientation issue or has Delfi just a bit anti Southern hemisphere? Alan ZL2BX

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Delfi still not heard over VK
by David 30 Apr '08

30 Apr '08

Hello All, 23:50 2008/04/29 UTC pass - nothing heard from Delfi-3C over VK. Admittedly I was concentrating on SEEDS, which I did hear very well. Yesterday I checked my setup was working by listening to VO-52's beacon and all is ok. Isn't this fun. 73 de David VK5DG

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DelfiC3 Spin Rate
by Rob Hardenberg PE1ITR 29 Apr '08

29 Apr '08

Hi All, Good DelfiC3 pass here on 2008-04-29 18:20~18:30UTC. Decoded 223 packets with the Rascal software. This time I used automatic doppler correction and tracked object D. I have the impression that DelfiC3 is earlier than object B. As experiment I tried to determine the spinrate of delfic3 and counted the dips in the signal level. Its 12 dips in 1 minute period so the spinrate at the moment must be 12 rpm or some related number (24,6,3.. rpm). See screenshot: http://www.pe1itr.com/satellite/delfic3_pe1itr_29apr2008.jpg 73 Rob PE1ITR http://www.pe1itr.com

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413 packets received from DelfiC3 (TLE +RASCAL screenshot).
by Cor 29 Apr '08

29 Apr '08

Hello All, In the 21:34UTC pass I received 413 packets. Sadly keps are not accurate so I had to search for the strongest signal (I lost sync somethimes). A screenshot of RASCAL software can be seen here: http://pd0rkc.ontwikkel.nl/DELFIC3/29April2008DelfiC3_TLE_orbit26.jpg DelfiC3 telemetry orbit 26: http://pd0rkc.ontwikkel.nl/DELFIC3/29April2008DelfiC3_TLE_orbit26.txt 73's Cor PD0RKC Ham Radio In Space: http://iss.ontwikkel.nl

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