[amsat-bb] Re: AO-10 and AO-16
Hi Joe, Actually, I checked on AO-16 last Saturday. I didn't even get the transmitter to come on, let alone stay on. It was a low pass, and I hope to check again in the next few weeks. If you'll remember, the problem with keeping the satellite ON is temperature related. If it gets lots of sun (little eclipse), it will be warm enough to remain on. Otherwise, it won't...and the orbit is such that it doesn't get enough sun--and it probably won't for another 10 years or so. But I check periodically. About every week or two Drew KO4MA and I try to turn AO-51 back on. My latest try was last Saturday. Nothing heard. IO-26 is still up there, and still humming; it needs to be turned on from time to time, so I do that. But we haven't figured out how to run it in voice like we did with AO-16; it doesn't appear possible. Don't know about AO-10; I haven't listened for a while. And I don't know if it is expected to come on without commanding (which I cannot do). 73, Mark N8MH At 10:28 PM 9/6/2012 -0500, Gary \"Joe\" Mayfield wrote: >Has anyone checked on AO-10 or AO-16 lately? > > > >73, > >Joe kk0sd > >___ >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 ___ 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] Re: AO-10 and AO-16
On a side note. Do we know the 'physical' status of AO-40? Is it still orbiting the earth? I don't believe I heard anything about it re-entering. I do remember a conversation here on the BB some time ago about making an attempt to command AO-40 again to see if it will respond. However, the command team stated they were reluctant to do so in the event it might cause further harm to an already bad situation. My comment would be that if this were the case what can we lose since we've gone this long without having its access. I think that if there is even a 1 percent chance of commanding it, it should be attempted since we've nothing to lose. Again, I may be in left field and missed something here, but I feel if there is a chance, it should be given a shot. If things go wrong, we're not any worse off then we have been without it being operational so long. Then again the command team may have already made an attempt and my comments are mute. Reid, W4UPD On 9/7/2012 6:42 AM, Mark L. Hammond wrote: Hi Joe, Actually, I checked on AO-16 last Saturday. I didn't even get the transmitter to come on, let alone stay on. It was a low pass, and I hope to check again in the next few weeks. If you'll remember, the problem with keeping the satellite ON is temperature related. If it gets lots of sun (little eclipse), it will be warm enough to remain on. Otherwise, it won't...and the orbit is such that it doesn't get enough sun--and it probably won't for another 10 years or so. But I check periodically. About every week or two Drew KO4MA and I try to turn AO-51 back on. My latest try was last Saturday. Nothing heard. IO-26 is still up there, and still humming; it needs to be turned on from time to time, so I do that. But we haven't figured out how to run it in voice like we did with AO-16; it doesn't appear possible. Don't know about AO-10; I haven't listened for a while. And I don't know if it is expected to come on without commanding (which I cannot do). 73, Mark N8MH At 10:28 PM 9/6/2012 -0500, Gary \"Joe\" Mayfield wrote: Has anyone checked on AO-10 or AO-16 lately? 73, Joe kk0sd ___ 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 ___ 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 - No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2197 / Virus Database: 2437/5252 - Release Date: 09/06/12 ___ 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] Re: Fw: Digital Slow Scan in space
Graham, What's 'medium resolution' ? Standard SSTV is not digital, it's analogous with the (now no longer used) analogue TV. There is true digital SSTV used on 80m and 40m and (I guess) other bands, from memory this is EasyPal; to implement this in a satellite would be a long and tedious task. Implementing one of the analogue SSTV modes would be easier - much easier - but quality is nowhere as good. Simon Brown, HB9DRV http://sdr-radio.com -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Graham Shirville We are looking for a practical system to use on a 1U, or perhaps 2U, cubesat to take medium definition images and transmit them to the ground on VHF for educational outreach purposes. ___ 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] Re: AO-10 and AO-16
At 08:05 AM 9/7/2012, you wrote in part: >However, the command team stated they were reluctant to do >so in the event it might cause further harm to an already bad situation. What more harm could there be? From what I have read, every attempt has already be made. It's my understanding that AO40 is dead. If anyone knows for sure please speak up, many would appreciate information. John, W0JAB ___ 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] AMSAT President Barry Baines, WD4ASW TV Interview on HAMRADIONOW.tv
Hello Everyone, Here is some good news that is best shared immediately: AMSAT President Barry Baines, WD4ASW TV Interview on HAMRADIONOW.tv Gary Pearce, KN4AQ, producer and host of the HAMRADIONOW.tv webcasts interviewed AMSAT President Barry Baines, WD4ASW at the Shelby North Carolina Hamfest. Barry's interview provides an in-depth update on AMSAT activities and plans. As Gary says, "So there's a lot going on at AMSAT. Exciting stuff like commanding a remote-control vehicle with instructions relayed through the ISS (think Mars Curiosity Rover)". As Barry said, "This isn't your grandfather's AMSAT" anymore. Barry discussed AMSAT's exciting projects including: + Project Fox Cubesat development + AMSAT selection for NASA's ELaNa launch program + AMSAT development of missions meeting STEM educational goals + AMSAT-ARRL-ARISS teamwork + Future opportunities in space + How you can join and help Watch the 60 minute interview at HAMRADIONOW.tv, Episode 19: http://arvideonews.com/hrn/HRN_Episode_0019.html While you are on the Amateur Radio Video News website please "click the pig" if you can donate to this amateur radio video series. [ANS thanks Gary Pearce, KN4AQ and Amateur Radio Video News for the above information] -- 73 de JoAnne K9JKM k9...@amsat.org Editor, AMSAT News Service Associate Editor, AMSAT Journal ___ 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] APRS back on 145.825 via ISS!
Just heard ISS back on 145.825. Two students went outside with a D7 HT and sent themselves email using APRS via ISS. Came back inside and were amazed to see the Email in their inbox already! Now they understand APRS! Bob, Wb4APR ___ 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] Re: APRS back on 145.825 via ISS!
On 07/09/12 17:53, Robert Bruninga wrote: Just heard ISS back on 145.825. Two students went outside with a D7 HT and sent themselves email using APRS via ISS. Came back inside and were amazed to see the Email in their inbox already! It must be nice to work the ISS with a handie. I suppose it helps being so far south. -- Gordon JC Pearce MM0YEQ ___ 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] Re: APRS back on 145.825 via ISS!
At 12:53 PM 9/7/2012 -0400, bruni...@usna.edu wrote: Just heard ISS back on 145.825. Two students went outside with a D7 HT and sent themselves email using APRS via ISS. Came back inside and were amazed to see the Email in their inbox already! Thank God for QRM. KB7ADL ___ 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] Re: AO-10 and AO-16
Reid, Still up there, and will be for years. Early on, after the propulsion incident, there WAS a reluctance to command certain functions for fear of making things worse. I recall some discussions at an AMSAT Symposium, perhaps imperfectly, on the subject. For instance, the solar panels were not deployed. They were working adequately in the stowed position. If only one deployed, then you would have had an unbalanced spacecraft, which would have made attitude control difficult to impossible. Also, the damage to the wires was unknown, and a short might be induced. Post final failure, there were some amazing tests run, including the use of a radio telescope which could hear the internal local oscillators responding to commands. The nature of the failure was well understood. I doubt anyone would be worried about making things worse, now. There is just little probability that it will pull an AO-10. 73s, Alan WA4SCA -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of w4upd Sent: Friday, September 07, 2012 8:05 AM To: amsat-bb@amsat.org Subject: [amsat-bb] Re: AO-10 and AO-16 On a side note. Do we know the 'physical' status of AO-40? Is it still orbiting the earth? I don't believe I heard anything about it re-entering. I do remember a conversation here on the BB some time ago about making an attempt to command AO-40 again to see if it will respond. However, the command team stated they were reluctant to do so in the event it might cause further harm to an already bad situation. My comment would be that if this were the case what can we lose since we've gone this long without having its access. I think that if there is even a 1 percent chance of commanding it, it should be attempted since we've nothing to lose. Again, I may be in left field and missed something here, but I feel if there is a chance, it should be given a shot. If things go wrong, we're not any worse off then we have been without it being operational so long. Then again the command team may have already made an attempt and my comments are mute. Reid, W4UPD On 9/7/2012 6:42 AM, Mark L. Hammond wrote: > Hi Joe, > > Actually, I checked on AO-16 last Saturday. I didn't even get the transmitter to come on, let alone stay on. It was a low pass, and I hope to check again in the next few weeks. If you'll remember, the problem with keeping the satellite ON is temperature related. If it gets lots of sun (little eclipse), it will be warm enough to remain on. Otherwise, it won't...and the orbit is such that it doesn't get enough sun--and it probably won't for another 10 years or so.But I check periodically. > > About every week or two Drew KO4MA and I try to turn AO-51 back on. My latest try was last Saturday. Nothing heard. > > IO-26 is still up there, and still humming; it needs to be turned on from time to time, so I do that. But we haven't figured out how to run it in voice like we did with AO-16; it doesn't appear possible. > > Don't know about AO-10; I haven't listened for a while. And I don't know if it is expected to come on without commanding (which I cannot do). > > 73, > > Mark N8MH > > At 10:28 PM 9/6/2012 -0500, Gary \"Joe\" Mayfield wrote: >> Has anyone checked on AO-10 or AO-16 lately? >> >> >> >> 73, >> >> Joe kk0sd >> >> ___ >> 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 > ___ > 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 > > > - > No virus found in this message. > Checked by AVG - www.avg.com > Version: 2012.0.2197 / Virus Database: 2437/5252 - Release Date: 09/06/12 > > ___ 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 ___ 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] Re: Fw: Digital Slow Scan in space
Hi Simon, Good question - "medium" was a deliberately vague term as it will also depend on the camera and available data rates etc. I was hoping we might be able to move on from analogue SSTV now.. we should be able to achieve much better quality images,,,as you suggest the challenge would be to do the digital encoding on board the spacecraft without using lots of power but, as mentioned, - if they can do it on a tiny payload hanging beneath a small helium balloon then it should be possible to do something similar on a spacecraft even a 1U cubesat! 73 Graham G3VZV -Original Message- From: Simon HB9DRV Sent: Friday, September 07, 2012 2:13 PM To: 'Graham Shirville' ; 'AMSAT BB' Subject: [amsat-bb] Re: Fw: Digital Slow Scan in space Graham, What's 'medium resolution' ? Standard SSTV is not digital, it's analogous with the (now no longer used) analogue TV. There is true digital SSTV used on 80m and 40m and (I guess) other bands, from memory this is EasyPal; to implement this in a satellite would be a long and tedious task. Implementing one of the analogue SSTV modes would be easier - much easier - but quality is nowhere as good. Simon Brown, HB9DRV http://sdr-radio.com -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Graham Shirville We are looking for a practical system to use on a 1U, or perhaps 2U, cubesat to take medium definition images and transmit them to the ground on VHF for educational outreach purposes. ___ 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 ___ 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] Re: Fw: Digital Slow Scan in space
Well you should be able to do it on small ARM processor, but you've always got to take transmission time into account - those pesky satellites do tend to move about quite a bit :) There's also the format used by the NOAA weather satellites - simple and works... Simon Brown, HB9DRV http://sdr-radio.com -Original Message- From: Graham Shirville [mailto:g.shirvi...@btinternet.com] Good question - "medium" was a deliberately vague term as it will also depend on the camera and available data rates etc. I was hoping we might be able to move on from analogue SSTV now.. we should be able to achieve much better quality images,,,as you suggest the challenge would be to do the digital encoding on board the spacecraft without using lots of power but, as mentioned, - if they can do it on a tiny payload hanging beneath a small helium balloon then it should be possible to do something similar on a spacecraft even a 1U cubesat! ___ 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] APRS back on 145.825 via ISS!
Yup working great! http://ariss.net/index.cgi?absolute=1 Hope to make some Digi contacts through all the beacons... 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] Re: APRS back on 145.825 via ISS!
I was thinking the same thing, Kevin. With all this noise about it being back up, I'm sure some people will boot up their PC's, turn the radio on, and walk away. It's likely that some of these people gate the traffic to the Internet but I'd wager greater than 50% of the unattended stations beaconing every minute "HEY I'M ON THE ISS" don't even have the courtesy to relay. 73 Clayton W5PFG On Fri, Sep 7, 2012 at 3:57 PM, Kevin Deane wrote: > Yup working great! http://ariss.net/index.cgi?absolute=1 Hope to make some > Digi contacts through all the beacons... > > 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 ___ 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] Re: Digital Slow Scan in space
Hi both. I believe the digital SSTV that is used on HF / VHF is in reality DRM, which is a forward error corrected digital communications standard (?) I suppose the real difficulty is implementing a method of reading an image file and then encoding it for transmission in a broadcast type format for general reception rather than one that requires handshaking or acknowledgments from the groundstation. An essential feature would be that whenever a 'packet' of data is received, that data is displayed rather than waiting for the complete image to be received error free. I couldn't find much on DRM encoding but I think it was originally intended for digital voice in a narrow bandwidth so it sounds suitable for low power satellite use. Thanks David -Original Message- From: Simon HB9DRV To: 'Graham Shirville' ; 'AMSAT BB' Sent: Fri, 7 Sep 2012 21:51 Subject: [amsat-bb] Re: Fw: Digital Slow Scan in space Well you should be able to do it on small ARM processor, but you've always got to take transmission time into account - those pesky satellites do tend to move about quite a bit :) There's also the format used by the NOAA weather satellites - simple and works... Simon Brown, HB9DRV http://sdr-radio.com -Original Message- From: Graham Shirville [mailto:g.shirvi...@btinternet.com] Good question - "medium" was a deliberately vague term as it will also depend on the camera and available data rates etc. I was hoping we might be able to move on from analogue SSTV now.. we should be able to achieve much better quality images,,,as you suggest the challenge would be to do the digital encoding on board the spacecraft without using lots of power but, as mentioned, - if they can do it on a tiny payload hanging beneath a small helium balloon then it should be possible to do something similar on a spacecraft even a 1U cubesat! ___ 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 ___ 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] Re: Fw: Digital Slow Scan in space and free food...
Argent Data makes a small SSTV camera about 1.5" cube for under $100. For all practical purposes it is a modern replacement for the original Kenwood VC-H1 SSTV handheld. He makes them for balloons etc. We have one on a model satellite hanging out in our lobby and anyone can trigger it with any FRS radio with the right channel and tone, and then they can also receive and display the picture on any laptop with SSTV software on it by just letting the laptop's mic hear the FRS radio speaker. The intent of this "spysat" in the lobby was so we could see when someone was having a reception out there and there might be free food. Bob, WB4APR -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Graham Shirville Sent: Friday, September 07, 2012 4:39 PM To: Simon HB9DRV; 'AMSAT BB' Subject: [amsat-bb] Re: Fw: Digital Slow Scan in space Hi Simon, Good question - "medium" was a deliberately vague term as it will also depend on the camera and available data rates etc. I was hoping we might be able to move on from analogue SSTV now.. we should be able to achieve much better quality images,,,as you suggest the challenge would be to do the digital encoding on board the spacecraft without using lots of power but, as mentioned, - if they can do it on a tiny payload hanging beneath a small helium balloon then it should be possible to do something similar on a spacecraft even a 1U cubesat! 73 Graham G3VZV -Original Message- From: Simon HB9DRV Sent: Friday, September 07, 2012 2:13 PM To: 'Graham Shirville' ; 'AMSAT BB' Subject: [amsat-bb] Re: Fw: Digital Slow Scan in space Graham, What's 'medium resolution' ? Standard SSTV is not digital, it's analogous with the (now no longer used) analogue TV. There is true digital SSTV used on 80m and 40m and (I guess) other bands, from memory this is EasyPal; to implement this in a satellite would be a long and tedious task. Implementing one of the analogue SSTV modes would be easier - much easier - but quality is nowhere as good. Simon Brown, HB9DRV http://sdr-radio.com -Original Message- From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org] On Behalf Of Graham Shirville We are looking for a practical system to use on a 1U, or perhaps 2U, cubesat to take medium definition images and transmit them to the ground on VHF for educational outreach purposes. ___ 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 ___ 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 ___ 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] Re: AO-10 and AO-16
Does anyone even have KEPS for AO-10? 73, Joe kk0sd -Original Message- From: Mark L. Hammond [mailto:marklhamm...@gmail.com] Sent: Friday, September 07, 2012 5:43 AM To: Gary "Joe" Mayfield; 'AMSAT-BB' Subject: Re: [amsat-bb] AO-10 and AO-16 Hi Joe, Actually, I checked on AO-16 last Saturday. I didn't even get the transmitter to come on, let alone stay on. It was a low pass, and I hope to check again in the next few weeks. If you'll remember, the problem with keeping the satellite ON is temperature related. If it gets lots of sun (little eclipse), it will be warm enough to remain on. Otherwise, it won't...and the orbit is such that it doesn't get enough sun--and it probably won't for another 10 years or so.But I check periodically. About every week or two Drew KO4MA and I try to turn AO-51 back on. My latest try was last Saturday. Nothing heard. IO-26 is still up there, and still humming; it needs to be turned on from time to time, so I do that. But we haven't figured out how to run it in voice like we did with AO-16; it doesn't appear possible. Don't know about AO-10; I haven't listened for a while. And I don't know if it is expected to come on without commanding (which I cannot do). 73, Mark N8MH At 10:28 PM 9/6/2012 -0500, Gary \"Joe\" Mayfield wrote: >Has anyone checked on AO-10 or AO-16 lately? > > > >73, > >Joe kk0sd > >___ >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 ___ 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] for sale
Hi: i have some transverters for sale. 1- Spectrum International Model MMV 1296 in the box with paper works asking $125.00 or offers 1-SSB linear power amplifier model 2310 500to 700 MV output 10 watts This is in the box too.asking $150.00 or offer Will ship in lower 48 states only. Thank you Jerry w0sat w0s...@gmail.com ___ 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] Deciphering Phase 3D Telemetry
All: I found a recording I had made of OSCAR-40's beacon on an old hard drive. I decoded the telemetry with AO40 RCV and found that it dates back to November 17, 2000. The status window shows that AO-40 was on it's third orbit at 15:11 UTC. I'd like to know the position of satellite when the recording was made and was wondering where I can find an accurate set of old Keplerian elements? Thanks, Tony -K2MO ___ 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] IO-26 as digital EMAIL relay?
> IO-26 is still up there, and still humming; > But we haven't figured out how to run it in > voice like we did with AO-16; Woha! But if it is a pacsat, can't it act as a digipeater if you just set the DIGI bit to on? Then people can use it for real-time digital QSO's. In the old days, it required everyone to get a $300 modem and use an SSB rig on the downlink. But the Uplink is FM. SO anyone can transmit. And these days, somone I am sure has already written the sound-card generate the manchester uplink! Then the satgates with the SSB receivers could capture all the downlink traffic. Or am I forgetting something? (I know, I'm an APRS hammer and everything kinda looks like an APRS nail...) But you dont have to call it APRS, just call it an emergency or EMAIL link providing worldwide coverage for ham travelers needing a way to get a message out... The global internet linked ground station and Email engine already exists, Just send the email. If an IGate hears it anywhere on the planet, then the Email is as good as delivered. Bob, WB4APR ___ 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] Re: Deciphering Phase 3D Telemetry
Hi Tony, All of the AO-40 telemetry is archived on the AMSAT website. You can start at http://www.amsat.org/amsat/ftp/telemetry/ao40/ For November 17 at 15:11 UTC you probably want the file http://www.amsat.org/amsat/ftp/telemetry/ao40/2000/11/ao40_2000-11-17_3.zip for the corresponding telemetry from that day. For the satellite's position, you can use the then-current TLEs from earlier that day which are in the file http://www.amsat.org/amsat/ftp/telemetry/ao40/2000/11/ao40_2000-11-17_2.zip Almost every telemetry zip file contains a .TLE file with the NORAD TLE elements that correspond to that telemetry. For example, the file ao40_2000-11-17_2.zip contains AO40_NORAD_SET_3.TLE which contains the then-current TLEs. Those TLEs were only a few hours old when your recording was made. If you load those into a prediction program you can get the satellite's position. If your telemetry data from your recording is not already in the archives, then I'm sure we could get it added as a late submission. Let us all know if your data is unique! If you're not sure, send me what you copied or send me the recording. 73 and I hope all of this helps, Douglas KA2UPW/5 -Original Message- From: Tony To: amsat-bb Sent: Fri, Sep 7, 2012 11:41 pm Subject: [amsat-bb] Deciphering Phase 3D Telemetry All: I found a recording I had made of OSCAR-40's beacon on an old hard drive. I decoded the telemetry with AO40 RCV and found that it dates back to November 17, 2000. The status window shows that AO-40 was on it's third orbit at 15:11 UTC. I'd like to know the position of satellite when the recording was made and was wondering where I can find an accurate set of old Keplerian elements? Thanks, Tony -K2MO ___ 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 ___ 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] Re: IO-26 as digital EMAIL relay?
Bob wrote: In the old days, it required everyone to get a $300 modem and use an SSB rig on the downlink. But the Uplink is FM. SO anyone can transmit. And these days, somone I am sure has already written the sound-card generate the manchester uplink! Hi Bob, I wrote that program to generate the Manchester uplink on a soundcard about ten years ago. The program is called UPW for "Uplink to Pacsats for Windows" and it's at http://www.quagliana.com/upw/index.html if anyone is still interested in it. UPW will generate the proper 1200 baud AX.25 APRS packet with NRZI and Manchester encoding suitable for feeding to the microphone of an FM transmitter. UPW is also mentioned on your APRS ASTARS page. :-) Bob continues: But if it is a pacsat, can't it act as a digipeater if you just set the DIGI bit to on? I think there's more to digipeating than just setting the digi bit. I believe IO-26 is still in MBL mode or something similar. I am pretty sure the satellite is not running the full PACSAT BBS software which was needed to digipeat AX25 packets, but I'll defer to Mark, N8MH, on the specifics of the current status of IO-26. 73, Douglas KA2UPW/5 ___ 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
