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

Delfi question
by Stargate 29 Apr '08

29 Apr '08

Hi all, I use Orbitron for satellite tracking and get my TLE/KEPS from CelesTrak and/or Space-Track. Whenever there is a new launch, I can never figure out which satellites are "NEW" from the names given on my list of satellites. Does Celestrak/Spacetrak update their data as soon as the bird is launched our should I do it manually? Orbitron has a TLE-NEW.txt file that usually shows the space shuttle launches in a format that I know. (example...STS-123) I hope this makes sense to someone. I'm not sure if I have made myself clear. hihi TIA RoD KD0XX

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CubeSats TLE object ?!
by Mineo Wakita 29 Apr '08

29 Apr '08

I'm forecasting now TLE object as follows, because of the separated sequence. 28Apr2008 UTC PSLV-C9 03:53:51 Launched OBJECT A = CANTROSAT-2A 04:08:36 Separated OBJECT B = IMS-1 04:09:21 Separated OBJECT C = CUTE-1.7+APDII 04:11:03 Separated OBJECT D = CANX-2 04:11:23 Separated OBJECT E = DELFI-C3 04:11:43 Separated OBJECT F = AAUSAT-II 04:12:03 Separated OBJECT G = SEEDS 04:12:23 Separated OBJECT H = COMPASS-1 04:12:43 Separated OBJECT J = CANX-6 04:13:04 Separated OBJECT A 1 32783U 08021A 08119.88027102 .00000646 00000-0 10000-3 0 105 2 32783 097.9238 179.7711 0029795 228.8808 130.9863 14.76319584 103 OBJECT B 1 32784U 08021B 08119.94564281 .00069490 00000-0 88843-2 0 96 2 32784 097.9993 179.9780 0014395 290.8942 069.0752 14.80954700 118 OBJECT C 1 32785U 08021C 08119.87823559 .00000714 00000-0 10000-3 0 113 2 32785 098.0018 179.9127 0013160 284.9772 074.9985 14.80602469 102 OBJECT D 1 32786U 08021D 08119.87805543 .00000721 00000-0 10000-3 0 115 2 32786 097.9993 179.9103 0012861 292.3044 067.6803 14.80984919 100 OBJECT E 1 32787U 08021E 08120.01294647 .00000729 00000-0 10000-3 0 85 2 32787 097.9952 180.0399 0013948 297.7423 062.2303 14.81397180 120 OBJECT F 1 32788U 08021F 08119.94534902 .00000731 00000-0 10000-3 0 80 2 32788 097.9969 179.9695 0014256 302.4237 057.5509 14.81501743 111 OBJECT G 1 32789U 08021G 08119.94541883 .00068724 00000-0 86975-2 0 109 2 32789 097.9925 179.9678 0013523 294.4274 065.5528 14.81394650 119 OBJECT H 1 32790U 08021H 08119.94537520 .00000732 00000-0 10000-3 0 38 2 32790 098.0048 179.9689 0012489 327.6008 032.4084 14.81590405 98 OBJECT J 1 32791U 08021J 08119.74282862 .00000726 00000-0 10000-3 0 14 2 32791 097.9961 179.7775 0014804 307.9492 052.0379 14.81249662 53

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Re: Delfi_C3 life
by Luc Leblanc 29 Apr '08

29 Apr '08

Hi In a chat session yesterday about DELFI C 3 with Jean-Pierre VE2AHD we are questioning ourselves about the mission length. As per the mission web site (see below) even if the satellite should stay in space for "several decade" the mission lifetime is planned for +- 1 year. As no batteries are in the satellite what will prevent the mission to go where no man has gone before... oups! to go well over the expected one year period? Components failure? this will most likely be the main reason for a limited time frame life expectation? As a cute girl cannot give what she don't have i think there is nothing who will prevent DELFI C3 to live for several years aside of a component failure or a shut down command given from earth. She seems to be made strong but it is an external evaluation... > > How long will the Delfi-C3 be in orbit? > The drawback of the altitude at which the satellite will fly is the decay of the orbit. Due to atmospheric drag the satellite will lose energy, and thus altitude. > For Delfi-C3 this means that it will stay in orbit for several decades. The Delfi-C3 mission has been developed around a mission lifetime of one year. > Luc Leblanc VE2DWE Skype VE2DWE www.qsl.net/ve2dwe WAC BASIC CW PHONE SATELLITE

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Determining when Delfi-C3 is out of eclipse?
by Rick Mann 29 Apr '08

29 Apr '08

I have a couple passes tonight, but I'm not sure if Delfi-C3 will be in eclipse or not. Can someone tell me? My first pass begins at about 0342 UTC, and the second begins at about 0516 UTC. Thanks! -- Rick

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Re: ISRO launch
by vu3sxegmail 29 Apr '08

29 Apr '08

Hello I am not aware abt tracking it as of now, mostly Vu3TYG or Vu2POP should have tried. Most of the tracking was telemetry, Delphi is on telemetry for 3 months atleast. one satellite is with no battery, so works only during daylight, as per Amsat.org Sandeep. ----- Original Message ----- From: "Mr Jeffrey L Ross" <radiooperator(a)comcast.net> To: "vu3sxegmail" <vu3sxe(a)gmail.com> Sent: Tuesday, April 29, 2008 8:23 AM Subject: Re: [amsat-bb] ISRO launch > read back > on the bb > ----- Original Message ----- > From: "vu3sxegmail" <vu3sxe(a)gmail.com> > To: <amsatindia(a)yahoogroups.com> > Cc: <amsat-bb(a)amsat.org> > Sent: Monday, April 28, 2008 5:58 AM > Subject: [amsat-bb] ISRO launch > > > > Hello All > > > > ISRO making history, congrats to all involved for the success of the > > launch > > on 10 satellites, fantastic feat. > > > > Does anyone know if any satellites can be tracked by Radio Amateurs, if so > > which frequencies, and satellites. > > > > Regards, > > > > Sundeep Shah. > > Vu3sxe / +91 94484 26365 > > > > _______________________________________________ > > 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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Fw: Fw: [amsat-ne] Cornell Satellite Team Needs Help
by Roger Kolakowski 29 Apr '08

29 Apr '08

----- Original Message ----- From: "Roger Kolakowski" <rogerkola(a)aol.com> To: <nsp25(a)cornell.edu>; <amsat-bb(a)amst.org> Sent: Monday, April 21, 2008 6:42 AM Subject: Fw: [amsat-bb] Fw: [amsat-ne] Cornell Satellite Team Needs Help > A good suggestion after you can hear the radio on the ridgeline...Roger > WA1KAT > > Forwarded by Roger WA1KAT > From: "Alan" <ve4yz(a)mts.net> > > > > I hope a ham close to Cornell can at least confirm their ground station is > > not the issue and quickly get that out of the equation by monitoring a > > couple of passes of our existing LEO's. And, in the process give them > some > > training on the use of the equipment. > >

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Over Denver Area ?
by D. Mynatt 29 Apr '08

29 Apr '08

Would anyone be able to confirm for a newbie that Delfi-C3 is in dark on pass 14 going over Denver? Therefore, can't heard on 145.930Mhz. Right? Dave ===== http://sciencecenter.no-ip.org SID ID: S-0258 APRS IGate KA0SWT LAT: 38'16.278" N LON: -104'40.537" W Alt: 4780ft DM78

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Re: Delphi c3
by Alan Cresswell 29 Apr '08

29 Apr '08

Hi David, Yes we can rule out antenna squint because the second pass this morning (2217 UT) was very strong horizon to horizon. Nothing heard on the previous pass and VK's report nothing on the next pass so something seems to be turning Delphi off before it gets down this way. Unfortunately all ascending node passes (Today 9:45pm local and 11:22pm local) are all well into eclipse so we only see a couple of descending node passes in the mornings here. Having only heard the one pass it seemed to be in what the control team described as "emergency mode". I had good sync lock but no packets and it certainly sounded much different from the Demo file which decodes perfectly. I guess we just keep monitoring and waiting down under! 73 Alan ZL2BX -----Original Message----- From: g0mrf(a)aol.com [mailto:g0mrf@aol.com] Sent: Wednesday, 30 April 2008 01:14 To: alancresswell(a)xtra.co.nz Subject: Re: [amsat-bb] Delphi c3 Hi Alan. I think you're right. Even the teams own news pages say that they have trouble in the morning asending passes, while the evening passes here in Europe are all fine. Possibly a squint problem, but my feeling is that it could be the software latching up after half a pass or so. I note that the evening passes here are all just after exiting eclipse and hence the satellite is 'reset' What are the ascending passes like with you? Thanks David 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? -----Original Message----- From: Alan Cresswell <alancresswell(a)xtra.co.nz> To: amsat-bb(a)amsat.org Sent: Tue, 29 Apr 2008 22:01 Subject: [amsat-bb] Delphi c3 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 _______________________________________________ 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 _____ AOL's new homepage has launched. Take a tour <http://info.aol.co.uk/homepage/> now.

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Re: Delfi-C3 hear ~0034Z from FN20 with audio
by Charles Reiche 29 Apr '08

29 Apr '08

I havent figured that out yet... I am hand tuning. Plus the satellite is about 2 minutes 30 seconds ahead of where my keps puts it, So my doppler tuning would be greatly skewed. :) N3CRT > Charlie, could you please send me a copy of your Doppler.SQF file for > satpc32 for Delfi-C3? > Thanks, Tom N9RPQ > > Charles Reiche wrote: >> I rushed home from work to load up my keps into satpc32... waited until >> Delfi-c3 came above my horizon, then had to wait till it exited from >> eclipse! >> >> I had the audio recorder going and caught this audio and sent 10 packets >> back to the TLM server. >> >> Very exciting! >> >> Check out my recording here: >> >> http://www.n3crt.net/amsat/delfic3/ >>

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Delfi-c3 heard!
by Mark L. Hammond 29 Apr '08

29 Apr '08

Okay, finally was in the shack and heard Delfi-c3 come out of eclipse tonight-- 4/29/08 around 02:08 +/- UTC from FM05PJ. There wasn't much of the footprint in the sun, but it was transmitting. No data decoded--by the time I tuned back from its "sister craft" at 437.475/.485 (which I heard some CW) to the 2M side I had missed the strongest signals. In any event, it was unmistakably Delfi-c3 on 145.930 +/- transmitting 1200 BPSK :) Nice job, Delfi-c3 team! 73, Mark L. Hammond [N8MH]

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