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CX2SA > SATDIG 09.11.15 01:00l 808 Lines 30516 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.SAL.URY.SOAM
To : SATDIG@WW
Today's Topics:
1. Re: FM signal on FO-29? (Paul Stoetzer)
2. Re: AO-7 (Eduardo Erlemann)
3. Re: AO-7 (Andrew Glasbrenner)
4. Re: AO-85 "reset" during pass (Jerry Buxton)
5. Re: AO-85 "reset" during pass (Daniel Est?vez)
6. Re: AO-85 "reset" during pass (Burns Fisher)
7. Re: FM signal on FO-29? (Jim Jerzycke)
8. Re: AO-7 (Eduardo Erlemann)
9. Re: AO-85 "reset" during pass (Jerry Buxton)
10. Re: FM signal on FO-29? (Zach Leffke)
11. Re: FM signal on FO-29? (Clayton W5PFG)
12. Re: FM signal on FO-29? (Paul Stoetzer)
13. FUNcube-1 Mode (Graham Shirville)
----------------------------------------------------------------------
Message: 1
Date: Sun, 8 Nov 2015 14:14:02 -0500
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Rick Walter <wb3csy@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] FM signal on FO-29?
Message-ID:
<CABzOSOrNcbgnYnrjqRT4O2k0viJa9O1zLM_DBx1=zRRhsawkjw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I was not on the pass, but it's not uncommon to hear FM signals,
normally non-amateur traffic from Central America and Mexico.
73,
Paul, N8HM
On Sun, Nov 8, 2015 at 2:03 PM, Rick Walter <wb3csy@xxxxx.xxx> wrote:
> I was just on the 18:44 Z pass of FO-29 and was certain I heard an FM
> signal around 435.869. There was a loud squeal and it sounded like an alien
> was talking! Should I get my hearing checked or did anyone else notice?
> Thanks.
> Rick - WB3CSY in FN10
>
> --
> Sent from Rick's gmail account
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 2
Date: Sun, 8 Nov 2015 19:33:45 +0000 (UTC)
From: Eduardo Erlemann <sasb.geo@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>, Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-7
Message-ID:
<472866996.1318167.1447011225086.JavaMail.yahoo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
I will be QRV as well.
73 Ed PY2RN
GG66
--------------------------------------------
On Sun, 11/8/15, Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx> wrote:
Subject: [amsat-bb] AO-7
To: amsat-bb@xxxxx.xxx
Date: Sunday, November 8, 2015, 2:06 PM
Hello to all, gud condictions today
for NA via AO7. I'm in QRV.
73 de PT9BM.
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx.
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
------------------------------
Message: 3
Date: Sun, 8 Nov 2015 14:38:05 -0500
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
To: "'Eduardo Erlemann'" <sasb.geo@xxxxx.xxx>, "'Gustavo Nicolau'"
<bombeiro.gustavo@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-7
Message-ID: <0f9901d11a5c$fd564d60$f802e820$@xxx>
Content-Type: text/plain; charset="us-ascii"
Ed, I will look for you at my AOS, please make lots of noise!
73, Drew KO4MA
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx On Behalf Of Eduardo
Erlemann via AMSAT-BB
Sent: Sunday, November 08, 2015 2:34 PM
To: amsat-bb@xxxxx.xxxx Gustavo Nicolau
Subject: Re: [amsat-bb] AO-7
I will be QRV as well.
73 Ed PY2RN
GG66
--------------------------------------------
On Sun, 11/8/15, Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx> wrote:
Subject: [amsat-bb] AO-7
To: amsat-bb@xxxxx.xxx
Date: Sunday, November 8, 2015, 2:06 PM
Hello to all, gud condictions today
for NA via AO7. I'm in QRV.
73 de PT9BM.
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx.
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@xxxxx.xxx. 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
------------------------------
Message: 4
Date: Sun, 8 Nov 2015 13:55:53 -0600
From: Jerry Buxton <n0jy@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-85 "reset" during pass
Message-ID: <563FA8C9.2010501@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
A few thoughts on this.
First, Burns mentioned "the hang timer on the transponder timing out not
having detected a 67Hz tone in a couple minutes".
He mis-spoke accidentally, the timing is one minute not a couple of
minutes. So the hang timer will drop one minute after IHU ceases
detecting a valid CTCSS.
Regarding the CTCSS detection, with the receive sensitivity issue we
believe that this couples with a "tight" tone detection that we
implemented for power budget reasons that I will elaborate on after we
commission AO-85. The short story is that it makes it harder for AO-85
to hear and therefore find the tone. The tone detect requires the
presence of the tone for 1.5-2 seconds to consider it valid therefore
any fading, loss of signal, a stronger station capturing the receiver
and perhaps being off frequency or low elevation so that their tone was
not heard to continue that two seconds, or perhaps the strongest station
was not using a tone - a number of factors might make it such that IHU
just didn't hear a tone that it considers valid, for 60 seconds, so the
hang timer times out. The tone is detected again, the hang timer is
activated.
The description of the situation indicates the lack of tone detect and
hang timer timeout based my experience testing Fox-1A.
Yes, tone detect is being addressed in Fox-1Cliff/D/B. :-)
Thanks for the reports. Hopefully this will help you understand what is
probably happening, so that you might recognize it if it happens again
and more importantly recognize if it is NOT what happened in a future
situation that you report to us.
Jerry Buxton, N?JY
On 11/8/2015 12:43, Daniel Est?vez wrote:
> I'm a bit doubtful on the no 67Hz on input theory. There were several
> stations trying to hit the satellite, including me. I was using only 5W,
> so perhaps the satellite won't lock to my 67Hz tone except in good
> conditions, but the other stations were probably using more power.
>
> El 08/11/15 a las 18:19, David G0MRF escribi?:
>> I think that just means there was no 67Hz on the input to start the 1
>> minute timer.
>>
>> However, there were some mails about testing another mode yesterday, so
>> the answer may be there.
>>
>> 73
>>
>> David
>>
>>
>> -----Original Message-----
>> From: Daniel Est?vez <daniel@xxxxxxxx.xxx>
>> To: amsat-bb <amsat-bb@xxxxx.xxx>
>> Sent: Sun, 8 Nov 2015 14:37
>> Subject: [amsat-bb] AO-85 "reset" during pass
>>
>> Hi all, An unusual thing happened during AO-85 last pass over Europe, at
>> about 14:20 UTC or so. The transponder stopped working and the satellite
>> went silent for about a minute. Then came the voice announcement in the
>> lines of "Hi! This is radio amateur satellite Fox 1", and some seconds
>> later the transponder started working again. I'm sorry that I have no
>> telemetry recording of the pass to try to see what happened. 73, Dani
>> M0HXM/EA4GPZ. _______________________________________________ Sent via
>> AMSAT-BB@xxxxx.xxx <mailto:AMSAT-BB@xxxxx.xxx>. 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@xxxxx.xxx. 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
------------------------------
Message: 5
Date: Sun, 8 Nov 2015 20:18:26 +0000
From: Daniel Est?vez <daniel@xxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-85 "reset" during pass
Message-ID: <563FAE12.1090407@xxxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Dear Jerry,
Many thanks for the in-depth explanation. Perhaps it's also possible
that several stations are transmitting at the same time, each of them
slightly off-frequency, so that the sat doesn't hear the 1.5-2 seconds
of tone from any one of these stations because they keep transmitting on
top of each other all the time, and some are weak and some are way off
frequency... This seems very plausible from what I was hearing on the
transponder.
73,
Dani M0HXM/EA4GPZ.
El 08/11/15 a las 19:55, Jerry Buxton escribi?:
> A few thoughts on this.
>
> First, Burns mentioned "the hang timer on the transponder timing out not
> having detected a 67Hz tone in a couple minutes".
> He mis-spoke accidentally, the timing is one minute not a couple of
> minutes. So the hang timer will drop one minute after IHU ceases
> detecting a valid CTCSS.
>
> Regarding the CTCSS detection, with the receive sensitivity issue we
> believe that this couples with a "tight" tone detection that we
> implemented for power budget reasons that I will elaborate on after we
> commission AO-85. The short story is that it makes it harder for AO-85
> to hear and therefore find the tone. The tone detect requires the
> presence of the tone for 1.5-2 seconds to consider it valid therefore
> any fading, loss of signal, a stronger station capturing the receiver
> and perhaps being off frequency or low elevation so that their tone was
> not heard to continue that two seconds, or perhaps the strongest station
> was not using a tone - a number of factors might make it such that IHU
> just didn't hear a tone that it considers valid, for 60 seconds, so the
> hang timer times out. The tone is detected again, the hang timer is
> activated.
>
> The description of the situation indicates the lack of tone detect and
> hang timer timeout based my experience testing Fox-1A.
>
> Yes, tone detect is being addressed in Fox-1Cliff/D/B. :-)
>
> Thanks for the reports. Hopefully this will help you understand what is
> probably happening, so that you might recognize it if it happens again
> and more importantly recognize if it is NOT what happened in a future
> situation that you report to us.
>
> Jerry Buxton, N?JY
>
> On 11/8/2015 12:43, Daniel Est?vez wrote:
>> I'm a bit doubtful on the no 67Hz on input theory. There were several
>> stations trying to hit the satellite, including me. I was using only 5W,
>> so perhaps the satellite won't lock to my 67Hz tone except in good
>> conditions, but the other stations were probably using more power.
>>
>> El 08/11/15 a las 18:19, David G0MRF escribi?:
>>> I think that just means there was no 67Hz on the input to start the 1
>>> minute timer.
>>>
>>> However, there were some mails about testing another mode yesterday, so
>>> the answer may be there.
>>>
>>> 73
>>>
>>> David
>>>
>>>
>>> -----Original Message-----
>>> From: Daniel Est?vez <daniel@xxxxxxxx.xxx>
>>> To: amsat-bb <amsat-bb@xxxxx.xxx>
>>> Sent: Sun, 8 Nov 2015 14:37
>>> Subject: [amsat-bb] AO-85 "reset" during pass
>>>
>>> Hi all, An unusual thing happened during AO-85 last pass over Europe, at
>>> about 14:20 UTC or so. The transponder stopped working and the satellite
>>> went silent for about a minute. Then came the voice announcement in the
>>> lines of "Hi! This is radio amateur satellite Fox 1", and some seconds
>>> later the transponder started working again. I'm sorry that I have no
>>> telemetry recording of the pass to try to see what happened. 73, Dani
>>> M0HXM/EA4GPZ. _______________________________________________ Sent via
>>> AMSAT-BB@xxxxx.xxx <mailto:AMSAT-BB@xxxxx.xxx>. 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@xxxxx.xxx. 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@xxxxx.xxx. 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
>
------------------------------
Message: 6
Date: Sun, 8 Nov 2015 15:20:07 -0500
From: Burns Fisher <burns@xxxxxx.xx>
To: Jerry Buxton <n0jy@xxxxx.xxx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 "reset" during pass
Message-ID:
<CABX7KxWe5L0f2ER2Y8CTAVjThsuHzTzNhd1q8-6+jPiuXMc8kQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Thanks Jerry. I never remember that timeout period even though I'm
the one that typed it into the software :-)
On Sun, Nov 8, 2015 at 2:55 PM, Jerry Buxton <n0jy@xxxxx.xxx> wrote:
> A few thoughts on this.
>
> First, Burns mentioned "the hang timer on the transponder timing out not
> having detected a 67Hz tone in a couple minutes".
> He mis-spoke accidentally, the timing is one minute not a couple of
> minutes. So the hang timer will drop one minute after IHU ceases
> detecting a valid CTCSS.
>
> Regarding the CTCSS detection, with the receive sensitivity issue we
> believe that this couples with a "tight" tone detection that we
> implemented for power budget reasons that I will elaborate on after we
> commission AO-85. The short story is that it makes it harder for AO-85
> to hear and therefore find the tone. The tone detect requires the
> presence of the tone for 1.5-2 seconds to consider it valid therefore
> any fading, loss of signal, a stronger station capturing the receiver
> and perhaps being off frequency or low elevation so that their tone was
> not heard to continue that two seconds, or perhaps the strongest station
> was not using a tone - a number of factors might make it such that IHU
> just didn't hear a tone that it considers valid, for 60 seconds, so the
> hang timer times out. The tone is detected again, the hang timer is
> activated.
>
> The description of the situation indicates the lack of tone detect and
> hang timer timeout based my experience testing Fox-1A.
>
> Yes, tone detect is being addressed in Fox-1Cliff/D/B. :-)
>
> Thanks for the reports. Hopefully this will help you understand what is
> probably happening, so that you might recognize it if it happens again
> and more importantly recognize if it is NOT what happened in a future
> situation that you report to us.
>
> Jerry Buxton, N?JY
>
> On 11/8/2015 12:43, Daniel Est?vez wrote:
>> I'm a bit doubtful on the no 67Hz on input theory. There were several
>> stations trying to hit the satellite, including me. I was using only 5W,
>> so perhaps the satellite won't lock to my 67Hz tone except in good
>> conditions, but the other stations were probably using more power.
>>
>> El 08/11/15 a las 18:19, David G0MRF escribi?:
>>> I think that just means there was no 67Hz on the input to start the 1
>>> minute timer.
>>>
>>> However, there were some mails about testing another mode yesterday, so
>>> the answer may be there.
>>>
>>> 73
>>>
>>> David
>>>
>>>
>>> -----Original Message-----
>>> From: Daniel Est?vez <daniel@xxxxxxxx.xxx>
>>> To: amsat-bb <amsat-bb@xxxxx.xxx>
>>> Sent: Sun, 8 Nov 2015 14:37
>>> Subject: [amsat-bb] AO-85 "reset" during pass
>>>
>>> Hi all, An unusual thing happened during AO-85 last pass over Europe, at
>>> about 14:20 UTC or so. The transponder stopped working and the satellite
>>> went silent for about a minute. Then came the voice announcement in the
>>> lines of "Hi! This is radio amateur satellite Fox 1", and some seconds
>>> later the transponder started working again. I'm sorry that I have no
>>> telemetry recording of the pass to try to see what happened. 73, Dani
>>> M0HXM/EA4GPZ. _______________________________________________ Sent via
>>> AMSAT-BB@xxxxx.xxx <mailto:AMSAT-BB@xxxxx.xxx>. 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@xxxxx.xxx. 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@xxxxx.xxx. 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
------------------------------
Message: 7
Date: Sun, 08 Nov 2015 20:25:37 +0000
From: Jim Jerzycke <kq6ea@xxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] FM signal on FO-29?
Message-ID: <563FAFC1.4030700@xxxxxxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
On 11/08/2015 07:03 PM, Rick Walter wrote:
> I was just on the 18:44 Z pass of FO-29 and was certain I heard an FM
> signal around 435.869. There was a loud squeal and it sounded like an alien
> was talking! Should I get my hearing checked or did anyone else notice?
> Thanks.
> Rick - WB3CSY in FN10
>
I've heard FM on FO-29 before, but it's been a while. I forget if it was
a Ham, or a Mexican/South American taxi or similar.
73, Jim KQ6EA
------------------------------
Message: 8
Date: Sun, 8 Nov 2015 20:27:31 +0000 (UTC)
From: Eduardo Erlemann <sasb.geo@xxxxx.xxx>
To: 'Eduardo Erlemann' <sasb.geo@xxxxx.xxx>, 'Gustavo Nicolau'
<bombeiro.gustavo@xxxxx.xxx>, Andrew Glasbrenner
<glasbrenner@xxxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] AO-7
Message-ID:
<456630434.1304007.1447014451852.JavaMail.yahoo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Hi Drew, thanks for the qso GG66 <> EL88
Not too much noise was necessary, that was relatively easy :)
Uploading qso to LoTW in a few minutes.
73 Ed PY2RN
GG66
--------------------------------------------
On Sun, 11/8/15, Andrew Glasbrenner <glasbrenner@xxxxxxxxxx.xxx> wrote:
Subject: RE: [amsat-bb] AO-7
To: "'Eduardo Erlemann'" <sasb.geo@xxxxx.xxx>, "'Gustavo Nicolau'"
<bombeiro.gustavo@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Date: Sunday, November 8, 2015, 5:38 PM
Ed, I will look for you
at my AOS, please make lots of noise!
73, Drew KO4MA
-----Original Message-----
From: AMSAT-BB [mailto:amsat-bb-bounces@xxxxx.xxxx
On Behalf Of Eduardo
Erlemann via
AMSAT-BB
Sent: Sunday, November 08, 2015
2:34 PM
To: amsat-bb@xxxxx.xxxx
Gustavo Nicolau
Subject: Re: [amsat-bb]
AO-7
I will be QRV as
well.
73 Ed PY2RN
GG66
--------------------------------------------
On Sun, 11/8/15, Gustavo Nicolau <bombeiro.gustavo@xxxxx.xxx>
wrote:
Subject: [amsat-bb]
AO-7
To: amsat-bb@xxxxx.xxx
Date: Sunday, November 8, 2015, 2:06 PM
Hello to all, gud
condictions today
for NA via AO7. I'm
in QRV.
73 de PT9BM.
_______________________________________________
Sent via AMSAT-BB@xxxxx.xxx.
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@xxxxx.xxx.
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
------------------------------
Message: 9
Date: Sun, 8 Nov 2015 15:06:12 -0600
From: Jerry Buxton <n0jy@xxxxx.xxx>
To: Burns Fisher <burns@xxxxxx.xx>
Cc: AMSAT BB <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] AO-85 "reset" during pass
Message-ID: <563FB944.3050607@xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
There's no reason to, you typed it already! ;-)
Jerry Buxton, N?JY
On 11/8/2015 14:20, Burns Fisher wrote:
> Thanks Jerry. I never remember that timeout period even though I'm
> the one that typed it into the software :-)
>
>
------------------------------
Message: 10
Date: Sun, 8 Nov 2015 17:13:27 -0500
From: Zach Leffke <zleffke@xx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] FM signal on FO-29?
Message-ID: <563FC907.5060702@xx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Hi Rick,
I've been monitoring FO-29 on and off for the last few weeks as
part of my AO-73 to FO-29 cross link experimentation. I have
consistently seen FM on FO-29. In fact I played a video at the AMSAT
symposium where I pointed it out in a spectral display (FFT and
Waterfall) of the FO-29 downlink. We can see the entire noise floor of
FO-29's passband with the VTGS setup, and when the FM activity jumps up,
you can see the entire passband of the transponder drop in power as the
FM signal sucks up all the power of the transponder.
I have detected, but have yet to decode AO-73's tlm beacon via FO-29.
Right now I'm operating on a weak crosslink signal theory as the reason
for failed decodes. I can hear FO-29 just fine (in fact VERY strong at
VTGS), but AO-73 is barely making it into the uplink passband. I've
come up with a simulation tool thats a mixture of STK output data and
python that tells me when chain events will occur (a chain being AO-73
to FO29 to VTGS) and a whole bunch of other info like doppler offsets,
crosslink path loss, etc.
In fact, this last Friday, around 1357 Eastern time, was one of the best
opportunities to catch AO-73 via FO-29, in terms of minimum crosslink
path loss, in a two week window. At the beginning of the FO-29 pass
there was LOTS of FM activity on FO-29. I was cursing and pulling my
hair out (to the dismay of the students who were watching) because I was
worried that the FM activity would suck up resources on the transponder
right when I'm hunting for a weak signal on the bird. BUT... as the
satellite continued through the pass (an ascending pass) the FM activity
died down, which was good for my experiment because the AO73 chain event
was about the last 300 seconds or so of the pass. I still didn't decode
(though I *think* I detected AO-73, I need to review the capture file
more) because doppler shift had the AO-73 signal sweeping right through
the center of FO-29's passband, where there was lots of normal SSB activity.
So yes, in the last couple weeks I've seen a LOT of FM activity on
FO-29. And based on my experience with Friday's pass, which was
ascending, I'm leading towards the Central/South America QRM theory.
Lots of strong FM activity as the pass started and the satellite was
over the lower latitudes, but as FO-29 ascended over higher latitudes
towards the north pole, the FM activity died down.
-Zach, KJ4QLP
On 11/08/2015 03:25 PM, Jim Jerzycke wrote:
> On 11/08/2015 07:03 PM, Rick Walter wrote:
>> I was just on the 18:44 Z pass of FO-29 and was certain I heard an FM
>> signal around 435.869. There was a loud squeal and it sounded like an
>> alien
>> was talking! Should I get my hearing checked or did anyone else notice?
>> Thanks.
>> Rick - WB3CSY in FN10
>>
> I've heard FM on FO-29 before, but it's been a while. I forget if it
> was a Ham, or a Mexican/South American taxi or similar.
>
> 73, Jim KQ6EA
> _______________________________________________
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> to all interested persons worldwide without requiring membership.
> Opinions expressed
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> of AMSAT-NA.
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------------------------------
Message: 11
Date: Sun, 8 Nov 2015 16:30:52 -0600
From: Clayton W5PFG <w5pfg@xxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: Re: [amsat-bb] FM signal on FO-29?
Message-ID: <563FCD1C.7020806@xxxxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
I wouldn't recommend playing the FM audio heard via FO-29 to a group of
children. Normally it's not English. It's most likely NOT a religious
broadcast based on their choice of crude words.
73
Clayton
W5PFG
On 11/8/2015 16:13, Zach Leffke wrote:
> So yes, in the last couple weeks I've seen a LOT of FM activity on
> FO-29. And based on my experience with Friday's pass, which was
> ascending, I'm leading towards the Central/South America QRM theory.
> Lots of strong FM activity as the pass started and the satellite was
> over the lower latitudes, but as FO-29 ascended over higher latitudes
> towards the north pole, the FM activity died down.
>
> -Zach, KJ4QLP
------------------------------
Message: 12
Date: Sun, 8 Nov 2015 17:33:56 -0500
From: Paul Stoetzer <n8hm@xxxx.xxx>
To: Clayton W5PFG <w5pfg@xxxxx.xxx>
Cc: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: Re: [amsat-bb] FM signal on FO-29?
Message-ID:
<CABzOSOp6qznzNNd5NJFiCEK+GNow54wixkYLJYSjwgNAzraxdw@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=UTF-8
Speaking of FM signals on FO-29, you'll be able to hear the AO-85
transponder through FO-29 when their paths cross as well. I wonder if
you could get a high enough SNR to decode the DUV...
73,
Paul, N8HM
On Sun, Nov 8, 2015 at 5:30 PM, Clayton W5PFG <w5pfg@xxxxx.xxx> wrote:
> I wouldn't recommend playing the FM audio heard via FO-29 to a group of
> children. Normally it's not English. It's most likely NOT a religious
> broadcast based on their choice of crude words.
>
> 73
> Clayton
> W5PFG
>
> On 11/8/2015 16:13, Zach Leffke wrote:
>>
>> So yes, in the last couple weeks I've seen a LOT of FM activity on
>> FO-29. And based on my experience with Friday's pass, which was
>> ascending, I'm leading towards the Central/South America QRM theory.
>> Lots of strong FM activity as the pass started and the satellite was
>> over the lower latitudes, but as FO-29 ascended over higher latitudes
>> towards the north pole, the FM activity died down.
>>
>> -Zach, KJ4QLP
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
------------------------------
Message: 13
Date: Sun, 8 Nov 2015 22:52:11 -0000
From: "Graham Shirville" <g.shirville@xxxxxxxxxx.xxx>
To: "AMSAT BB" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] FUNcube-1 Mode
Message-ID: <5A4032B06B6940A68CF097FA257DA26C@xxxxxxx.xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi All,
Just to confirm that FUNcube-1 was returned to automatic mode during the
2100UTC pass over Europe this evening. The transponder and low power
telemetry will now be available when the spacecraft is in eclipse and the
high power telemetry only when in sunlight.
73
Graham
G3VZV
------------------------------
Subject: Digest Footer
_______________________________________________
Sent via amsat-bb@xxxxx.xxx.
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 member? Join now to support the amateur satellite program!
http://www.amsat.org/mailman/listinfo/amsat-bb
------------------------------
End of AMSAT-BB Digest, Vol 10, Issue 345
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