July 2015 - AMSAT-BB - mailman.amsat.org

ISS SSTV
by Cor PDØRKC 18 Jul '15

18 Jul '15

Hello radio friends, Thanks for your reports. I have sended an e-mail to the ARISS manager in Russia and informed him about the carrier problem. In the past this problem also occured in the beginning of the events often the Russian crew managed to solve the problem. Have patience. 73s Cor PD0RKC

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Planned SSTV. Testing from ISS ???
by David 18 Jul '15

18 Jul '15

Hello all: This is David EA4SG from Madrid Spain. Just listening on 145.800 for the planned SSTV transmission, just some minutes ago at 10:53 UTC I copied a very strong intermitent signal coming from the ISS direction. I call the ISS telling them that I was listening and offering my help if needed and one of the two russians cosmonauts took the microphone and answered to my call. After the report I asked if they are going to send SSTV and he told me that they will be sending the pictures the whole day. Then he QRT. Very happy for my voice QSO with RS0ISS. 3 minutes later and until LOS a long carrier, strong signal but no modulation at all. Carrier was there until LOS so I could not had the chance to inform them that the expected SSTV modulation was missing. Just for your information. 73s David EA4SG

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Planned SSTV. Testing from ISS ???
by David 18 Jul '15

18 Jul '15

Hello all: This is David EA4SG from Madrid Spain. Just listening on 145.800 for the planned SSTV transmission, just some minutes ago at 10:53 UTC I copied a very strong intermitent signal coming from the ISS direction. I call the ISS telling them that I was listening and offering my help if needed and one of the two russians cosmonauts took the microphone and answered to my call. After the report I asked if they are going to send SSTV and he told me that they will be sending the pictures the whole day. Then he QRT. 3 minutes later and until LOS a long carrier, strong signal but no modulation at all. Just for your information. 73s David EA4SG

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SSTV-ISS
by KO6TZ Bob 18 Jul '15

18 Jul '15

10:30 utc Pass over USA Very strong S-9+20 FM carrier No SSTV Video Just like the last two events..... Bob KO6TZ

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Speakers + SSTL Visit at International Space Colloquium Guildford
by M5AKA 18 Jul '15

18 Jul '15

There is a great line up of speakers for the AMSAT-UK International Space Colloquium at the Holiday Inn, Guildford as well as visits to the satellite construction facilities at the SSTL Kepler Building. The event is open to all. http://amsat-uk.org/2015/07/16/colloquium-speakers-saturday/ ISS SSTV July 18-19 on 145.800 MHz FM (5 kHz deviation) http://amsat-uk.org/2015/07/14/iss-sstv-july-18-19/ Useful ISS SSTV links http://amsat-uk.org/beginners/iss-sstv/ Duchifat1 CubeSat Update http://amsat-uk.org/2015/07/17/duchifat1-update/ 73 Trevor M5AKA ---- AMSAT-UK http://amsat-uk.org/ Twitter https://twitter.com/AmsatUK Facebook https://facebook.com/AmsatUK ----

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DEORBITSAIL telemetry decoded !
by Roland Zurmely 17 Jul '15

17 Jul '15

With the new decoder from DK3WN: <http://www.qsl.net/py4zbz/deorbitsail.htm#b> 73 de Roland GH70un

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CN84 on SO-50 and AO-73 tonight
by Bryan Green 17 Jul '15

17 Jul '15

Short notice -- will be active tonight from CN84 with LotW confirmation on the following passes: SO-50 at 02:38z SO-50 at 04:19z AO-73 at 04:37z Sent from my iPhone

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Re: [amsat-bb] PSAT PSK31 experimental software (BRICsat too)
by Robert Bruninga 17 Jul '15

17 Jul '15

Remember to TEST your 10m PSK31 uplink about 10 minutes early and you may bring up BRICSAT PSK31. I may have just heard it about 6 minutes before PSAT. Same uplink and same downlink as PSAT. Bob, WB4aPR -----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of David W0DHB Sent: Thursday, July 16, 2015 8:27 PM To: 'Joe'; amsat-bb(a)amsat.org Subject: Re: [amsat-bb] PSAT PSK31 experimental software I'm using a GAP Challenger vertical for 10m and on 70cm an M2 30el (15h/15V) RHCP yagi on a Yaesu G5500 az/el rotator, but a handheld Arrow or similar antenna for 70cm would probably work fine. -----Original Message----- From: AMSAT-BB [mailto:[email protected]] On Behalf Of Joe Sent: Thursday, July 16, 2015 6:03 PM To: amsat-bb(a)amsat.org Subject: Re: [amsat-bb] PSAT PSK31 experimental software Thats what I was most interested in the antennas. describe them... Joe WB9SBD Sig The Original Rolling Ball Clock Idle Tyme Idle-Tyme.com http://www.idle-tyme.com On 7/16/2015 5:43 PM, David W0DHB wrote: > Thanks Joe I forgot BB would wrap line. > This one works also > https://www.dropbox.com/s/r6ywkczcf95o3f2/NO84.wav?dl=0 > > Base equipment is > 10m SSB Transmitter with the ability for TX audio being fed by > Computer sound card. > 70cm FM RX / antenna system capable of copying satellite downlink and > able to feed RX audio to Computer. > Computer with Windows/Mac , DopplerSQF software and software that will > demod > PSK31 (Fldigi,Digipan DM780 to name a few) > > Software to do downlink doppler tuning is very useful, but not required. > > Dave W0DHB > > -----Original Message----- > From: AMSAT-BB [mailto:[email protected]] On Behalf Of Joe > Sent: Thursday, July 16, 2015 4:24 PM > To: amsat-bb(a)amsat.org > Subject: Re: [amsat-bb] PSAT PSK31 experimental software > > hEDRE i FIXED THAT url ALSO, > > *http://tinyurl.com/q3np2sm > > Joe > * > Sig > The Original Rolling Ball Clock > Idle Tyme > Idle-Tyme.com > http://www.idle-tyme.com > On 7/16/2015 2:57 PM, David W0DHB wrote: >> Andy >> >> Here is a recording of the 1930 pass of NO-84 >> https://www.dropbox.com/s/2qtb5d2cm3ktrr0/FM%20435.359944MHz%20%5B12k >> % >> 5D%207 >> -16-2015%2019%2033%2052.wav?dl=0 >> >> Bob KO6TZ and I had a successful QSO. My audio was set at 1500 Uplink >> frequency of 28.119700 MHz . >> >> The signals seemed to be stable, decoding at my end (DM780 ) was not >> stellar, I'm running the recording through fldigi, MixW and Digipan >> to see if it's any better. >> >> Dave W0DHB >> >> -----Original Message----- >> From: AMSAT-BB [mailto:[email protected]] On Behalf Of David >> W0DHB >> Sent: Thursday, July 16, 2015 8:41 AM >> To: 'aflowers(a)frontiernet.net'; amsat-bb(a)amsat.org >> Subject: Re: [amsat-bb] PSAT PSK31 experimental software >> >> Hey Andy >> >> The ability to select soundcard would be helpful. In my setup TX >> audio is fed by a virtual audio cable set to match the 48K sample >> rate that DopplerPSK is using. >> Folks using windows should set the recording device side of their >> soundcard to a 48K sample rate (it usually defaults to 44.1K). >> >> You are correct that the uplink frequency is high, I apply a -300 Hz >> calibration offset. >> >> Thanks for all your work on this. >> >> Dave W0DHB >> >> -----Original Message----- >> From: AMSAT-BB [mailto:[email protected]] On Behalf Of >> aflowers(a)frontiernet.net >> Sent: Thursday, July 16, 2015 6:29 AM >> To: amsat-bb(a)amsat.org >> Subject: Re: [amsat-bb] PSAT PSK31 experimental software >> >> Bob, Dave; >> That's great. I'm interested in how well it tracks when the >> satellite is at a very high elevation and the Doppler is >3 Hz/s. I >> suspect the error is going to be mostly in the estimates of the >> orbital elements, but > we'll see. >> I will try to join you on the pass when I can cobble together an >> uplink and a downlink in the same place--probably next week sometime >> after I get back from vacation. >> >> I think you should be able to share a sound device on most OS's, but >> I have not tried. I assumed it would work on modern Windows OS's >> because of the hardware abstraction. The program appears to run fine >> on OSX, but I have not tried running CocoaModem or some other >> software next to it. Ultimately I could also add a demodulator to >> the program itself, but that will take some work....I know several >> hams have separate sound cards for radio stuff, so I may need to add >> a device selection option in case the system default (or whatever >> Java picks as the > default) isn't what you want. >> The audio frequency displayed in DopplerPSK is the audio frequency >> being send to the radio, not what you should expect in the passband >> of your downlink receiver. The LO on PSAT is apparently a bit below >> 28120 KHz, so if your radio was tuned to 28120 USB (suppressed >> carrier >> frequency) you would expect to be a bit higher than 2000Hz in the FM > passband: >> http://www.urel.feec.vutbr.cz/esl/files/Projects/PSAT/P%20sat%20trans >> p >> onder% >> 20WEB%20spec02.htm >> >> In general, if you want to be lower in the passband I would lower >> your transmitter RF frequency rather than the audio frequency going >> to the transmitter. The reason being that if you have any >> non-linearity in the audio chain you don't end up transmitting a >> harmonic higher in the band that might bother someone else. Of >> course, you can probably see if this is an issue or not since the >> satellite also serves as a crude signal analyzer :-) I chose 2000 Hz >> as a center since at maximum Doppler of around 700 Hz, the >> ~2700 Hz tone should go through the transmitter's IF filter without >> too much attenuation while keeping all the third harmonics and most >> of the time the second harmonic above the cutoff of a 3 KHz IF filter. >> Every radio is a bit different, however. You may find that the >> 1500Hz sweep in the program shows you all your passband ripple in >> your IF filter :-) >> >> Since it works, I'm more motivated to improve the ergonomics of the >> interface. Much of that depends on the unique operating practices of >> satellite operation. >> >> Andy K0SM/2 >> >> >> >> >> On Thursday, July 16, 2015 12:31 AM, KO6TZ Bob >> <my.callsign(a)verizon.net> >> wrote: >> >> >> The software worked great !!! Produced a straight line on the >> waterfall for the down link. >> >> As expected, I was alone on the pass, so no opportunity for a contact. >> >> I was using digi-pan for the RX, my signal was at around 2200Hz.. >> Probably an indication the oscillator in my radio is off a bit. I >> think I will lower the frequency from 2000 to about 1600. That will >> put my signal lower in the VF pass band. >> >> I like the program. Had good copy. >> >> THANKS..... >> >> >> BOB KO6TZ >> _______________________________________________ >> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available >> to all interested persons worldwide without requiring membership. >> Opinions expressed are solely those of the author, and do not reflect >> the official views of AMSAT-NA. >> Not an AMSAT-NA member? Join now to support the amateur satellite program! >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb >> >> >> _______________________________________________ >> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available >> to all interested persons worldwide without requiring membership. >> Opinions expressed are solely those of the author, and do not reflect >> the official views of AMSAT-NA. >> Not an AMSAT-NA member? Join now to support the amateur satellite program! >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb >> >> _______________________________________________ >> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available >> to all interested persons worldwide without requiring membership. >> Opinions expressed are solely those of the author, and do not reflect >> the official views of AMSAT-NA. >> Not an AMSAT-NA member? Join now to support the amateur satellite program! >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb >> >> _______________________________________________ >> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available >> to all interested persons worldwide without requiring membership. >> Opinions expressed are solely those of the author, and do not reflect >> the > official views of AMSAT-NA. >> Not an AMSAT-NA member? Join now to support the amateur satellite program! >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb >> >> >> > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. > Opinions expressed are solely those of the author, and do not reflect > the official views of AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > > _______________________________________________ > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. > Opinions expressed are solely those of the author, and do not reflect > the official views of AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > > > _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb

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FUNcube-1 operations
by Graham Shirville 17 Jul '15

17 Jul '15

Good evening, Just to report that FUNcube-1 is now in continuous “transponder on” mode for the weekend. It can be expected that, as usual, she will stay in this mode until Sunday evening (UTC time) A heads up for next weekend – As AMSAT-UK is holding their Collloquium event in Guildford Surrey, it is expected that FUNcube-1 will be switched to continuous transponder mode , exceptionally, from Thursday evening (July 23rd) until either Sunday evening (July 26th) or, more likely, Monday evening (July 27th). This will enable the Colloquium attendees to view or demonstrate and enjoy the transponder operations for the maximum possible time. Thanks for your understanding! best 73 Graham G3VZV

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LVB tracker board free
by Bob- W7LRD 17 Jul '15

17 Jul '15

Free to good home a unpopulated LVB tracker board V1.2 and the smaller one V1.1 as well as the disk. Can't use it just taking up space. Just buy me a cup of coffee if you ever get to Seattle. 73 Bob W7LRD Seatle

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