April 2020 - AMSAT-BB - mailman.amsat.org

AMSAT
by Ronaldo Martins 28 Apr '20

28 Apr '20

OLÁ 73 de PY2RMY

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LoTW and PO-101
by Bob Meyers 28 Apr '20

28 Apr '20

I am using N3FJP's logging program to upload contacts to LoTW. It has been working very good on all satellites. However when I try and upload PO-101 it gets rejected by LoTW. Does anybody know what LoTW wants for this satellites name? I get a message back that says "invalid satellite name on line 41". Bob WA8FXQ

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QUETZAL-1
by Pedro Converso 28 Apr '20

28 Apr '20

Passes & freqs http://amsat.org.ar/pass?satx=quetzal Congrats Guatemala for your 1st Satellite. 73, lu7abf, Pedro

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First signals from Quetzal-1
by Roland Zurmely 28 Apr '20

28 Apr '20

Please see here: < https://www.qsl.net/py4zbz/quetzal.htm > 73s de Roland PY4ZBZ

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NASA NEWS - Lunar Flashlight mission - CUBESAT TECH
by christy hunter 28 Apr '20

28 Apr '20

FYI - NASA CUBESAT NEWS https://www.jpl.nasa.gov/news/news.php?feature=7647&utm_source=iContact&utm… 73 Christy KB6LTY

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Re: [amsat-bb] Repeater interference on AO-92
by Eric Williams 28 Apr '20

28 Apr '20

Yes, I am also listening to the uplink freq. Next pass is in about 1 hour. 73 Eric KV1J (I use digest mode for this list so pardon the not including the string of messages) -----Original Message----- From: Eric Williams [mailto:[email protected]] Sent: Tuesday, April 28, 2020 10:51 AM To: 'amsat-bb(a)amsat.org' <amsat-bb(a)amsat.org> Subject: RE: Repeater interference on AO-92 I am in the area of a suspected repeater. Also in the area of the towns mentioned to could be that machine. I'll watch for the next AO-92 pass and announce my call of the repeater a few times and listen to AO-92. So if you hear "KV1J" it is me testing for the interference. I have not looked at the pass schedule yet but I can try a couple passes. 73, Eric KV1J FN42

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Repeater interference on AO-92
by Roy Dean 28 Apr '20

28 Apr '20

> > Yes, I am also listening to the uplink freq. Next pass is in about 1 hour. > 73 Eric KV1J Keep in mind that somebody may be commanding it into picture mode. --Roy K3RLD

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Re: [amsat-bb] Repeater interference on AO-92
by Eric Williams 28 Apr '20

28 Apr '20

I am in the area of a suspected repeater. Also in the area of the towns mentioned to could be that machine. I'll watch for the next AO-92 pass and announce my call of the repeater a few times and listen to AO-92. So if you hear "KV1J" it is me testing for the interference. I have not looked at the pass schedule yet but I can try a couple passes. 73, Eric KV1J FN42

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Re: [amsat-bb] Repeater interference on AO-92
by Burns Fisher 28 Apr '20

28 Apr '20

>Maybe someone here can better explain how the Fox tone squelch >works, for example how long it stays on after hearing a tone. The Fox FM satellites (now AO-91 and AO-92) have their receivers on all the time and listen for the 67Hz tone. If they do not hear it they turn on the Tx every 2 minutes for about 10 seconds for a couple frames of telemetry and a voice ID (without the repeater enabled). If they do hear a tone, they turn on the repeater for 1 minute (extended each time they hear the tone). The tone detector is not too sharp so it might trigger on 69.3 or 71.9 Hz as well. It does require that the tone be heard for a bit of time (I don't remember exactly how long--in the hundreds of ms, I think), so it is not too likely to be triggered by random noise that has some components in that frequency range. Of course it is not impossible. Unlike many terrestrial repeaters, the Fox repeaters do not transmit a tone squelch on the downlink. Those frequencies are right where we stick the telemetry. I hope that is helpful... Burns WB1FJ AMSAT Fox Flight Software > >

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Re: [amsat-bb] Repeater interference on AO-92
by tjschuessler＠verizon.net 28 Apr '20

28 Apr '20

Do be aware that the repeater that might be causing the interference may actually not be running 67Hz tone. The Fox satellites do need to hear 67 Hz to wake the transponder, but after that it is a bent pipe. Thus, as long as it got woke up, it would pass whatever FM it hears. Like the apparent DMR interference we dealt with several months ago, it's folks who think that it is "Clear air" down there and do their own thing. Hopefully someone with a scanner can locate and politely pass along some education. Tom Schuessler, N5HYP EM12ms _______ Date: Mon, 27 Apr 2020 08:55:51 -0400 From: Stephen DeVience <sjdevience(a)gmail.com <mailto:[email protected]> > To: amsat-bb(a)amsat.org <mailto:[email protected]> Subject: [amsat-bb] Repeater interference on AO-92 Message-ID: <CAMPfQQD4qBy7HOEC29rqjwVsWf7f=yoPfQY4gjibqqHtmPsajQ(a)mail.gmail.com <mailto:CAMP[email protected]> > Content-Type: text/plain; charset="UTF-8" Following up on the previous discussion, I too heard a ragchew on AO-92 during the 4/26 15:20 pass, and others heard it on the 4/27 02:00 pass. I checked for repeaters in New England with a 67 Hz CTCSS tone, and W1RJC in New Bedford comes up. Its output at 145.110 MHz also uses a 67 Hz tone and would have a third harmonic at 435.330 MHz, just about right for AO-92 considering doppler. It is also consistent with hearing a NH callsign and discussions about sea vessels :) -Stephen, N8URE

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