This is by far the easiest voice satellite to hear with minimum antennas. Let's be sure to talk about this on the net tonight.
Uplink: 437.8000 MHz FM
Downlink 145.8000 MHz FM
Remember you must tune the uplink for doppler shift, tune 5 to 10 khz low at the beginning of the pass (437.790, 437.795), and high at the end of the pass (437.805, 437.810).
73, Drew KO4MA
-----Forwarded Message-----
>From: Håkan Harrysson <sm7wsj(a)telia.com>
>Sent: Jan 31, 2008 3:03 PM
>To: amsat-bb(a)amsat.org
>Subject: [amsat-bb] ISS repeater
>
>Hello,
>
>Looks to me the ISS repeater was right now activated as i heard some strange activity on 145800. Short after that i heard UA1TDZ calling CQ.
>
>Lets hear from people along the path.
>
>73 Hakan SM7WSJ
>
>_______________________________________________
>Sent via AMSAT-BB(a)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
Since AO-16 was recovered approximately 6 months ago, the command team has
attempted to reload the satellite software almost a dozen times without
success. Subsequently a series of memory tests were performed which points
towards a hardware failure which prevents restarting the spacecraft software
successfully. This team included Bruce Rahn WB9ANQ and Jim White WD0E
advising Mark Hammond N8MH as the primary groundstation. Mark put in many
early hours during the multiple reloads and test sessions, with Bruce, Jim,
and others advising. Thank you to all involved for your hard work.
After the conclusion that the spacecraft computer system was damaged and as
discussions about decommissioning were taking place, Jim recalled a series
of low level commands included in the spacecraft design by Tom Clark, K3IO
during construction. One of these commands allows an uplink receiver to be
directly tied to a downlink transmitter. The twist is that the uplink is
regular FM but the downlink via the BPSK transmitter is DSB (Double
Sideband). Mark placed the satellite in this mode early this week and some
testing was undertaken. The satellite hears VERY well, and the reduced
bandwidth by using either USB or LSB on the groundstation receiver allows
for a very robust downlink. Tuning the downlink is just like on a linear
transponder, meaning it is tight and with fast Doppler. Uplink tuning is not
required, just as with the FM mode V/U satellites. QSOs were made between
N8MH, WD4ASW, KO4MA, K5QXJ, and WA6FWF. My personal observations include
being able to access and hear the satellite within one degree of the
horizon, much lower than any other current bird for my QTH. This should be
an easy satellite with omni antennas and a 70cm preamp.
With that explanation, I'm happy to open the satellite to general use on
voice for a test period. Please submit reports either to the -bb or to
ao16(a)amsat.org . The uplink is 145.920 FM, and the downlink is 437.026 SSB
+/- Doppler shift. Please restrict your uplink power to a reasonable level,
and do not transmit without being able to hear the downlink. All the general
single-channel guidelines apply. Enjoy this bird's new life!
73, Drew KO4MA
AMSAT-NA VP Operations
Excellent work by the team!
Congratulations.
Stefan, VE4NSA
-----Original Message-----
From: "amsat-bb-bounces(a)amsat.org" <amsat-bb-bounces(a)amsat.org> on behalf of "Andrew Glasbrenner" <glasbrenner(a)mindspring.com>
Sent: Tuesday, January 22, 2008 6:47 PM
To: "pacops(a)amsat.org" <pacops(a)amsat.org>, "amsat-bb(a)amsat.org" <amsat-bb(a)amsat.org>
Cc: "amsat-florida(a)amsat.org" <amsat-florida(a)amsat.org>, "ans-editor" <ans-editor(a)amsat.org>
Subject: [amsat-bb] AO-16 reconfigured.
Since AO-16 was recovered approximately 6 months ago, the command team has
attempted to reload the satellite software almost a dozen times without
success. Subsequently a series of memory tests were performed which points
towards a hardware failure which prevents restarting the spacecraft software
successfully. This team included Bruce Rahn WB9ANQ and Jim White WD0E
advising Mark Hammond N8MH as the primary groundstation. Mark put in many
early hours during the multiple reloads and test sessions, with Bruce, Jim,
and others advising. Thank you to all involved for your hard work.
After the conclusion that the spacecraft computer system was damaged and as
discussions about decommissioning were taking place, Jim recalled a series
of low level commands included in the spacecraft design by Tom Clark, K3IO
during construction. One of these commands allows an uplink receiver to be
directly tied to a downlink transmitter. The twist is that the uplink is
regular FM but the downlink via the BPSK transmitter is DSB (Double
Sideband). Mark placed the satellite in this mode early this week and some
testing was undertaken. The satellite hears VERY well, and the reduced
bandwidth by using either USB or LSB on the groundstation receiver allows
for a very robust downlink. Tuning the downlink is just like on a linear
transponder, meaning it is tight and with fast Doppler. Uplink tuning is not
required, just as with the FM mode V/U satellites. QSOs were made between
N8MH, WD4ASW, KO4MA, K5QXJ, and WA6FWF. My personal observations include
being able to access and hear the satellite within one degree of the
horizon, much lower than any other current bird for my QTH. This should be
an easy satellite with omni antennas and a 70cm preamp.
With that explanation, I'm happy to open the satellite to general use on
voice for a test period. Please submit reports either to the -bb or to
ao16(a)amsat.org . The uplink is 145.920 FM, and the downlink is 437.026 SSB
+/- Doppler shift. Please restrict your uplink power to a reasonable level,
and do not transmit without being able to hear the downlink. All the general
single-channel guidelines apply. Enjoy this bird's new life!
73, Drew KO4MA
AMSAT-NA VP Operations
_______________________________________________
Sent via AMSAT-BB(a)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
----- Original Message -----
From: "Robert Bruninga" <bruninga(a)usna.edu>
To: <amsat-bb(a)amsat.org>
Sent: Tuesday, January 22, 2008 1:56 PM
Subject: [amsat-bb] Longwood (Orlando FLA)
> Im looking for a ham volunteer near Longwood Florida.
> This is NE Orlando.
>
> This is related to the Meteor Scatter 6m project we mentioned
> before.
>
> This is kinda short fuse. We have located a few dozen 6 meter
> radios in a warehouse there, but only have 5 days to act on it.
> We may need someone to go take a look and make sure this is not
> a pig in a poke.
>
> Reply to bruninga(a)usna.edu
>
> Bob, WB4APR
>
>
> _______________________________________________
> Sent via AMSAT-BB(a)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
Tonight's Florida AMSAT net will feature the President of AMSAT-NA, Rick
Hambly, W2GPS, discussing current AMSAT projects and developments including
a question and answer session. All interested parties are encouraged to
participate regardless of location.
The net meets at 7:30PM Eastern on the NI4CE and N4HHA repeater systems
covering most of central Florida. RF frequencies may be found here:
http://www.ni4ce.org/ni4ce.htm and here: http://n4hha.org/ . Echolink users
may check in via KG4YZY-R, node number 4429. Please configure all echolink
systems to suppress local courtesy tones and IDs over the link. Interested
parties may also listen to a live streaming link at
mms://repeater.aprsfl.net:2222/ .
I hope to hear many familiar calls tonight on the net!
73, Drew KO4MA
Thanks everyone for your help. Google keep pointing me to
http://groundstation.sourceforge.net/gpredict/index.php
but as was pointed out, it was under the the older 0.8.0 version and not the newest 0.9.0. Duh !!
Keith N4ZQ
-- "Keith N4ZQ" <n4zq(a)netzero.net> wrote:
Anyone know where I can find the file gpredict-x.y.z-win32.zip ?
Google not helping much..
Keith N4ZQ
_____________________________________________________________
_______________________________________________
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Not an AMSAT-NA member? Join now to support the amateur satellite program!
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