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CX2SA > SATDIG 27.08.10 21:03l 385 Lines 11924 Bytes #999 (0) @ WW
BID : AMSATBB5355
Read: GUEST
Subj: AMSAT-BB-digest V5 355
Path: IZ3LSV<IW8PGT<CX2SA
Sent: 100827/1903Z @:CX2SA.LAV.URY.SA #:16209 [Minas] FBB7.00e $:AMSATBB5355
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Happy Birthday from Space (ps8rf Piraja)
2. Re: New Satellite Downlink? (Robert Bruninga)
3. Re: Happy Birthday from Space (Fabiano Moser)
4. Re: New Satellite Downlink? Emergency ACKS (Robert Bruninga)
5. Offtopic: Echolink in Paris (Fabiano Moser)
6. Office Closed (Martha)
----------------------------------------------------------------------
Message: 1
Date: Thu, 26 Aug 2010 16:05:22 -0300
From: ps8rf Piraja <ps8rf@xxxxxxx.xxx>
Subject: [amsat-bb] Happy Birthday from Space
To: <amsat-bb@xxxxx.xxx>
Message-ID: <SNT121-W16046D81442E8CFDBE4C97E0850@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hello all,
Fabiano CT7ABD/PY5RX, yesterday August 25, had a one day doubly special.
First the date of his birthday and secondly, by receiving his
congratulations ( Happy Birthday ) sung by the crew of the International
Space Station directly from space. Fabiano is a great radio operator and
charismatic, congratulations on passing day of his birthday and to have
received this fantastic and historic celebration from space.
Listen Audio by CT1EAT: http://www.issfanclub.com/node/28329
73
Piraja, PS8RF
The Amateur Radio is supportive and helpful in any circumstance.
------------------------------
Message: 2
Date: Thu, 26 Aug 2010 16:14:00 -0400
From: "Robert Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink?
To: "'jon'" <jon@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <0B659A6BE3A840A585869526251AEBA6@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
> I've done DSP soundcard coding before. Years ago
> I wrote a DGPS decoder, so if you need some more
> coders, I'd be happy to help.
I'm embarassed that I still have not heard the bird on 2 tries.
Its supposed to be on 149.987 MHz and you can hear it's 2.3 KHz
tone with an FM receiver... I did hear it on APL-JHU's system
also consisting of an amateur OSCAR class station... But not on
mine yet.... OOPS! Wait! I have a very sharp DCI BANDPASS
filter up there! Duh.... Ill try a different antenna this
time!
OK, the signal is 50 baud modulated with + and - 60 degree phase
shift on the 400 MHz carrier (it can be switched to the 149.987
MHz carrier, but is not there currently). The wave form of the
modulation is as follows:
To transmit a "1" the carrier is phase shifted +60 degrees for
about 2 ms, then shifted -60 deg for about 2 ms and then brought
back to carrier with no phase shift for about 6 ms, then it is
shifted - 60 deg again for 2ms and then +60 for 2ms and then
brought back to no shift for another 6 ms. The "0" is the
opposite pattern of shifts. This process provides a clock
signal at twice the bit rate. The actual exact period of each
symbol is 19.7 ms.
The beginning of each exact 2 minute (6103 bit block) is marked
with 0111111111111111111111110, that is 23 "1"'s with a leading
and ttrailing zero.
Bob, Wb4APR
> On Wed, 25 Aug 2010, Robert Bruninga wrote:
>
> > Possible new AMSAT Application?
> >
> > We may have access to two old TRANSIT navigation satellites
with
> > a 50 baud downlink at 149.985 (and 400 MHz). (presently
coming
> > over in the mid afternoon). My problem is, coming up with
any
> > meaningful application to use them for communications that
would
> > capture the interest of students, hams or volunteers in
support
> > of education, public service or emergency comms or just
plain
> > fun...
> >
> > The downlink can be heard on an OMNI antenna (though I would
> > suggest a 3/4 wave (55") vertical) and could be decoded by a
> > simple software only application with a sound card. (someone
has
> > to write it)...
> >
> > The total useful message capability is about 500 bytes
> > transmitted every 2 minutes (at 50 baud). The uplink is
very
> > specialized and can ONLY BE DONE from one (or two) very
special
> > commmand stations. These satellites of course were the
original
> > Navy Navigation satellite system (also called OSCARS) and so
the
> > message would be in-place of the normal navigation data. SO
in
> > a sense, this is a downlink BROADCAST application. Since
ham
> > radio is two way, I'm stumped for applications.
> >
> > The total message capability of 500 Bytes can contain one
long
> > ARRL bulletin, or 20 APRS position/status reports, or say 20
or
> > so APRS text messages, or say 50 "callsign exchanges" or
maybe
> > even 1 thumbnail image... but what's the application?
> >
> > Even if we allow say, INTERNET link to the command station
for
> > "anyone" to contribute to the twice per-day upload, then
> > everyone's receiver application can receive them... For
what?
> >
> > So Im looking for ideas. All I can come up with so far is:
> > 1) ARRL Bulletins? (I don't even know how often ARRL sends
> > bulletins...)
> > 2) Navy/Army/AF MARS broadcast bulletins...
> > 3) Internet message in-to-command-upload-to message RF
downlink.
> > Two stations do this to each other and it counts as a
two-way
> > QSO?
> > 4) ...
> >
> > Every scenario of interest usually begins with the much
higher
> > value of UPLINK from the individual field station, not
> > downlink.. Hence I am stumped.
> >
> > HUMMH... Maybe purely educational? If the software can run
on
> > any PC with a sound card connected to any scanner... Then
every
> > school can use it as a satellite downlink signal of
interest..
> > What kind of thumbnail image can fit in 500 bytes? Send in
your
> > picture and get it downlinked on a given day?
> >
> > Etc..
> >
> > Will need a DSP volunteer to write the sound card decoder.
> >
> > Bob, WB4APR
> >
> > _______________________________________________
> > Sent via AMSAT-BB@xxxxx.xxx. 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
> >
>
------------------------------
Message: 3
Date: Fri, 27 Aug 2010 11:59:34 +0100
From: Fabiano Moser <fabianomoser@xxxxx.xxx>
Subject: [amsat-bb] Re: Happy Birthday from Space
To: ps8rf Piraja <ps8rf@xxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTin+hXmMHz6rObGCo6aFWYaQpo-=foWroFzF-Avo@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello Piraj? and friends,
Thank you for your kind words.
Every contact are special for me, and I remember all of.
One point important too is feel how the astronauts enjoy the amateur radio
on ISS.
One time Bill McArthur told me during a QSO that "We are an important part
of this mission". I believe on that, and we must be proud to be a part of
the missions via ARISS project.
Thank you ARISS, AMSAT and volunteers worldwide that does a wonderful job
with amateur radio in Space.
Hope all of you have a pleasure with the ISS.
Best Regards,
Fabiano Moser
CT7ABD - PY5RX
Lisbon/Portugal
2010/8/26 ps8rf Piraja <ps8rf@xxxxxxx.xxx>
>
> Hello all,
>
>
> Fabiano CT7ABD/PY5RX, yesterday August 25, had a one day doubly special.
> First the date of his birthday and secondly, by receiving his
> congratulations ( Happy Birthday ) sung by the crew of the International
> Space Station directly from space. Fabiano is a great radio operator and
> charismatic, congratulations on passing day of his birthday and to have
> received this fantastic and historic celebration from space.
>
>
> Listen Audio by CT1EAT: http://www.issfanclub.com/node/28329
>
> 73
>
> Piraja, PS8RF
>
> The Amateur Radio is supportive and helpful in any circumstance.
>
>
>
>
> _______________________________________________
> Sent via AMSAT-BB@xxxxx.xxx. 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
>
--
73
Fabiano Moser CT7ABD / PY5RX
"There is no great talent without great will. (Honor? de Balzac)"
------------------------------
Message: 4
Date: Fri, 27 Aug 2010 08:55:44 -0400
From: "Robert Bruninga" <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: New Satellite Downlink? Emergency ACKS
To: <bruninga@xxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <9436DB8590894DCE82A51DA115621CD7@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
OK, I think I have an application idea that would apply to
emergency comunications response.
Since this is a mostly one-way downlink satellite channel (that
can be received with ANY FM receiver a vertical whip and a
laptop with sound card), this means it can be fielded in the
emergency area very trivially. The use of this channel would be
to ACKnowledge the receipt of outgoing health and welfare
traffic. I would propose that the MARS volunteers could manage
this during an emergency.
Currently traffic from an emergency is usually one-way outbound,
and all inboud health-and-welfare concern traffic is blocked to
keep the channels open. But if this satellite broadcast channel
was available, then outboud traffic could assign a code number
to each outbond message and when that was delivered to the final
recepient, then the code number coiuld be sent back over the
satellite broadcast channel to confirm delivery. In addition, a
few digits could also be appended to indicate typical responses
from a pre-set response list.
So, for normal non-emergency times, the channel would be for
Q-tweets to exercise the system. During emergencys, the
downlink could be switched over to this emergency ack system.
Bob, WB4APR
> -----Original Message-----
> OOPS! Wait! I have a very sharp DCI BANDPASS
> filter up there! Duh.... Ill try a different
> antenna this time!
Yep, heard it fine on an HT with a long whip.
>>> Possible new AMSAT Application?
>>>
>>> We may have access to two old TRANSIT navigation
>>> satellites with a 50 baud downlink at 149.985
>>> (and 400 MHz).... My problem is, coming up with
>>> any meaningful application to use them for
>>> communications that would capture the interest
>>> of students, hams or volunteers in support
>>> of education, public service or emergency comms
>>> or just plain fun...
>>>
>>> The total useful message capability is about 500
>>> bytes transmitted every 2 minutes (at 50 baud).
>>> The uplink is very specialized and can ONLY BE
>>> DONE from one (or two) very special commmand
>>> stations.
------------------------------
Message: 5
Date: Fri, 27 Aug 2010 15:08:52 +0100
From: Fabiano Moser <fabianomoser@xxxxx.xxx>
Subject: [amsat-bb] Offtopic: Echolink in Paris
To: amsat-bb <AMSAT-BB@xxxxx.xxx>
Message-ID:
<AANLkTikKJv7zs5SJCapRZ6VQMtc9T74sH9OqsKB1aDkQ@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hello,
Sorry for Offtopic question.
I will be in Paris from 28sep - 02Oct
Someone can give me info about Echolink station (QRG) in range of Paris?
I want to try a QSO with friends in Brazil (PP5HR-R Station), and Holland.
Can you help me? Thank you
--
73
Fabiano Moser CT7ABD / PY5RX
"There is no great talent without great will. (Honor? de Balzac)"
------------------------------
Message: 6
Date: Fri, 27 Aug 2010 10:48:03 -0400
From: Martha <martha@xxxxx.xxx>
Subject: [amsat-bb] Office Closed
To: AMSAT BB <amsat-bb@xxxxx.xxx>
Message-ID:
<AANLkTim3J9BBz9nOD_242p52pwZhyifkbEV3JVzrCxEm@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
The AMSAT office will be closed until Tuesday, September 7th. I will be
going to Long Beach Island (LBI) NJ for holiday. If you are planning to
attend the AMSAT Symposium, please go to the AMSAT store and register
on-line.
--
73- Martha
------------------------------
_______________________________________________
Sent via amsat-bb@xxxxx.xxx. Opinions expressed are those of the author.
Not an AMSAT member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 5, Issue 355
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