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CX2SA > SATDIG 11.11.08 16:35l 1014 Lines 34733 Bytes #999 (0) @ WW
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From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. LOTW and AO-16 QSOs (Alan P. Biddle)
2. SSTV on AO-51 (Andrew Glasbrenner)
3. working ao-51 (finding the bird) (Eric Fort)
4. anyone up for the 0347 utc so-50 pass through DM14? (Eric Fort)
5. Re: working ao-51 (finding the bird) (n3tl@xxxxxxxxx.xxxx
6. SSTV on AO-51 (Luc Leblanc)
7. Re: working ao-51 (finding the bird) (Eric Fort)
8. CO-56 silent (?) (David Giles)
9. Re: working ao-51 (finding the bird) (Greg D.)
10. Delfi-C3 primary data server not available (Wouter Jan Ubbels)
11. Re: working ao-51 (finding the bird) (Michael Heim)
12. AO-16 update 11 November 2008 (Mark L. Hammond)
13. Re: working ao-51 (finding the bird) (Michael Heim)
----------------------------------------------------------------------
Message: 1
Date: Mon, 10 Nov 2008 14:21:05 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] LOTW and AO-16 QSOs
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <26C13F6CDB614D83892F0AED2D729E49@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
The LOTW does not handle split mode QSOs such as AO-16, and AO-51 when it is
that mode. It does, however, want a mode. I have been using the TX mode,
but have had a couple of QSOs "bounce" because of mode mismatch. Not all
that important, but is there a recommended way to pick the mode for logging
purposes?
Alan
WA4SCA
-----------------------------------
What's the opposite of Diversity?
University!
Catherine McMillan
------------------------------
Message: 2
Date: Mon, 10 Nov 2008 19:41:57 -0500
From: "Andrew Glasbrenner" <glasbrenner@xxxxxxxxxx.xxx>
Subject: [amsat-bb] SSTV on AO-51
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Message-ID: <07AFA071FBCF4FFCB29C4D76549142A2@xxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
We had a little cross-uplink QRM on the 0030 pass tonight from SO-50 users,
but several pictures came through fine from KE7ULS, K7WIN, and KB1PVH. One
station had a hot mike at some point, and was trying to send with very low
audio levels. It wasn't perfect, but I think enjoyable. If you want to
try...PLEASE listen and make sure the uplink is clear before transmitting,
and try to give a voice notice before starting if you can.
Thanks and 73,
Drew, KO4MA
------------------------------
Message: 3
Date: Mon, 10 Nov 2008 18:33:14 -0800
From: "Eric Fort" <eric.fort@xxxxx.xxx>
Subject: [amsat-bb] working ao-51 (finding the bird)
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<2ad2af430811101833j144cb05fu4ff962891f31f33c@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I think I finally heard the ao-51 downlink sending some form of digital data
(likely sstv) this evening from DM14GK at 0218 GMT near the very end of the
pass. I had much trouble finding the bird and it took most of the pass to
find. What can everyone suggest for making it progressively easier?
Antenna is an arrow with duplexer feeding a vx-6 ht.
Eric
PS
I'm curious, who's uplink was that?
------------------------------
Message: 4
Date: Mon, 10 Nov 2008 18:44:17 -0800
From: "Eric Fort" <eric.fort@xxxxx.xxx>
Subject: [amsat-bb] anyone up for the 0347 utc so-50 pass through
DM14?
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<2ad2af430811101844n3ba4930bj77888a4e3faefa89@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
I'll be looking for contacts on the 0347 GMT pass through DM14GK via SO-50.
If there please call AF6EP. I'll be calling cq looking for a first sat
contact.
Eric
AF6EP
------------------------------
Message: 5
Date: Tue, 11 Nov 2008 03:03:19 +0000
From: n3tl@xxxxxxxxx.xxx
Subject: [amsat-bb] Re: working ao-51 (finding the bird)
To: eric.fort@xxxxx.xxxx AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<111120080303.22536.4918F5F70006DA650000580822230650029B0A02D2089B9A019C
04040A0DBF049BCC02@xxx.xxx>
Content-Type: text/plain
Hey Eric,
What are you using to find the times and such for passes? Even if you're only
using a handheld station - which is all I used for months here with good
success - I would suggest downloading and installing one of the tracking
programs available online. SatPC32 is very good, especially if you ultimately
are going to use it to guide an az/el rotor setup and to tune your radio(s)
for Doppler. I am old school here, doing everything manually (and will be for
the foreseeable future), and I use a program called Orbitron. I like it a lot
for a number of reasons - not the least of which is its ability to provide you
with a schedule of upcoming passes based on parameters you provide it.
Each listing on that schedule gives you the time of Acquisition of Signal
(AOS) along with an azimuth position. It also lists time and azimuth for
maximum elevation, and time and azimuth for Loss of Signal (LOS). If you have
those data and a compass, you can "map" a pass in advance, which is what I do.
I note "landmarks" for AOS, mid pass and LOS, then simply turn the compass on
its side to check the angle at maximum elevation. From there, it's a matter of
visualizing the satellite rising, moving across the sky and setting. Watching
visible passes of the International Space Station is a great way to get some
visual practice to help when trying to "see" an amateur satellite pass as it
happens. You won't actually see the satellite, of course, but watching the ISS
will give you an idea of how a satellite moves across the sky - especially if
you have a chance to watch passes with different maximum-elevation angles.
My first handheld station included a Yaesu VX-7R HT and an Arrow, so I have
literally hundreds of passes' worth of experience with that antenna. When
you're searching for the satellite, are you twisting your wrist to adjust the
position of the elements (i.e., the antenna's polariztion relative to the
satellite)? If not, you should try that. There have been more than a few times
when a twist of the wrist made the difference for me in terms of getting a new
grid square, or not.
I hope at least some of this proves helpful.
73,
Tim - N3TL
AMSAT Member No. 36820
Athens, Ga. - EM84ha
-------------- Original message from "Eric Fort" <eric.fort@xxxxx.xxx>: ------
--------
> I think I finally heard the ao-51 downlink sending some form of digital data
> (likely sstv) this evening from DM14GK at 0218 GMT near the very end of the
> pass. I had much trouble finding the bird and it took most of the pass to
> find. What can everyone suggest for making it progressively easier?
> Antenna is an arrow with duplexer feeding a vx-6 ht.
>
> Eric
>
> PS
>
> I'm curious, who's uplink was that?
> _______________________________________________
> 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: 6
Date: Mon, 10 Nov 2008 19:16:28 -0500
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
Subject: [amsat-bb] SSTV on AO-51
To: amsat-bb@xxxxx.xxx
Message-ID: <4918888C.26353.C31C98D@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset=US-ASCII
On the 2249 UTC 74 deg elevation pass i try one SSTV transmission but only
hear a very weak audio on the downlink on a S9 plus 30 carrier.
There is a problem with the audio level setting probably?
I also hear someone speaking with a child it look like a telephone
conversation a bit off the uplink frequency.
A couple of also weak SSTV tone where transmitted but to weak to be decoded
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 7
Date: Mon, 10 Nov 2008 20:41:01 -0800
From: "Eric Fort" <eric.fort@xxxxx.xxx>
Subject: [amsat-bb] Re: working ao-51 (finding the bird)
To: n3tl@xxxxxxxxx.xxx
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<2ad2af430811102041icc20904y27f7056d72347c2f@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Presently I'm using a vx-6 and a handheld arrow antenna. I'm getting my
tracking information from the amsat website. I've downloaded gpredict for
osx but have not got it running yet, mainly the price was right. if any of
you have this running under osx I'd like to hear from you. for The
forseeable future my station will run under unix so some version of predict
seems like the likely choice. Other suggestions for tracking under unix are
welcome, especially those which are low cost. orbitron and pcsat32 look
nice but unfortunately they only run under windows.
as for tracking I have been attempting to orient for best polorization but
finding and keeping on the sat while tuning around is still somewhat
difficult. one question though - Are bearings true or magnetic?
Eric
AF6EP
On Mon, Nov 10, 2008 at 7:03 PM, <n3tl@xxxxxxxxx.xxx> wrote:
> Hey Eric,
>
> What are you using to find the times and such for passes? Even if you're
> only using a handheld station - which is all I used for months here with
> good success - I would suggest downloading and installing one of the
> tracking programs available online. SatPC32 is very good, especially if you
> ultimately are going to use it to guide an az/el rotor setup and to tune
> your radio(s) for Doppler. I am old school here, doing everything manually
> (and will be for the foreseeable future), and I use a program called
> Orbitron. I like it a lot for a number of reasons - not the least of which
> is its ability to provide you with a schedule of upcoming passes based on
> parameters you provide it.
>
> Each listing on that schedule gives you the time of Acquisition of Signal
> (AOS) along with an azimuth position. It also lists time and azimuth for
> maximum elevation, and time and azimuth for Loss of Signal (LOS). If you
> have those data and a compass, you can "map" a pass in advance, which is
> what I do. I note "landmarks" for AOS, mid pass and LOS, then simply turn
> the compass on its side to check the angle at maximum elevation. From there,
> it's a matter of visualizing the satellite rising, moving across the sky and
> setting. Watching visible passes of the International Space Station is a
> great way to get some visual practice to help when trying to "see" an
> amateur satellite pass as it happens. You won't actually see the satellite,
> of course, but watching the ISS will give you an idea of how a satellite
> moves across the sky - especially if you have a chance to watch passes with
> different maximum-elevation angles.
>
> My first handheld station included a Yaesu VX-7R HT and an Arrow, so I have
> literally hundreds of passes' worth of experience with that antenna. When
> you're searching for the satellite, are you twisting your wrist to adjust
> the position of the elements (i.e., the antenna's polariztion relative to
> the satellite)? If not, you should try that. There have been more than a few
> times when a twist of the wrist made the difference for me in terms of
> getting a new grid square, or not.
>
> I hope at least some of this proves helpful.
>
> 73,
>
> Tim - N3TL
> AMSAT Member No. 36820
> Athens, Ga. - EM84ha
> -------------- Original message from "Eric Fort" <eric.fort@xxxxx.xxx>:
> --------------
>
>
> > I think I finally heard the ao-51 downlink sending some form of digital
> data
> > (likely sstv) this evening from DM14GK at 0218 GMT near the very end of
> the
> > pass. I had much trouble finding the bird and it took most of the pass to
>
> > find. What can everyone suggest for making it progressively easier?
> > Antenna is an arrow with duplexer feeding a vx-6 ht.
> >
> > Eric
> >
> > PS
> >
> > I'm curious, who's uplink was that?
> > _______________________________________________
> > 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: 8
Date: Tue, 11 Nov 2008 16:20:59 +1030
From: David Giles <vk5dg@xxxx.xxx.xx>
Subject: [amsat-bb] CO-56 silent (?)
To: amsat <amsat-bb@xxxxx.xxx>
Message-ID: <49191D43.7030807@xxxx.xxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Hello All,
I've been listening to some of the passes of CO-56 (CUTE 1.7+APD) over
the last couple of days and have not heard its continuous carrier.
Today I listened 10 minutes before and after the predicted pass and
heard nothing.
Can anyone confirm this?
73 de David VK5DG
------------------------------
Message: 9
Date: Mon, 10 Nov 2008 22:04:38 -0800
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: working ao-51 (finding the bird)
To: <eric.fort@xxxxx.xxx>, <n3tl@xxxxxxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <BLU133-W30ECF5900BC1E1DD95854AA9150@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Eric,
I use both gpredict and predict under Linux, and they work great. What sort
of problem are you having?
For me, gpredict is for the visual and prediction side of things, and predict
(the text-mode application) drives my Az/El rotors, and my radios (for
Doppler) with the help of a small homebrew client. There's no problem running
both at the same time, and amazingly (!) they both give pretty close to the
same results.
You might be able to run some of the Windows-based prediction programs under
Wine, but no guarantees.
Good luck,
Greg KO6TH
> Date: Mon, 10 Nov 2008 20:41:01 -0800
> From: eric.fort@xxxxx.xxx
> To: n3tl@xxxxxxxxx.xxx
> CC: amsat-bb@xxxxx.xxx
> Subject: [amsat-bb] Re: working ao-51 (finding the bird)
>
> Presently I'm using a vx-6 and a handheld arrow antenna. I'm getting my
> tracking information from the amsat website. I've downloaded gpredict for
> osx but have not got it running yet, mainly the price was right. if any of
> you have this running under osx I'd like to hear from you. for The
> forseeable future my station will run under unix so some version of predict
> seems like the likely choice. Other suggestions for tracking under unix are
> welcome, especially those which are low cost. orbitron and pcsat32 look
> nice but unfortunately they only run under windows.
>
> as for tracking I have been attempting to orient for best polorization but
> finding and keeping on the sat while tuning around is still somewhat
> difficult. one question though - Are bearings true or magnetic?
>
> Eric
> AF6EP
>
> On Mon, Nov 10, 2008 at 7:03 PM, <n3tl@xxxxxxxxx.xxx> wrote:
>
> > Hey Eric,
> >
> > What are you using to find the times and such for passes? Even if you're
> > only using a handheld station - which is all I used for months here with
> > good success - I would suggest downloading and installing one of the
> > tracking programs available online. SatPC32 is very good, especially if
you
> > ultimately are going to use it to guide an az/el rotor setup and to tune
> > your radio(s) for Doppler. I am old school here, doing everything manually
> > (and will be for the foreseeable future), and I use a program called
> > Orbitron. I like it a lot for a number of reasons - not the least of which
> > is its ability to provide you with a schedule of upcoming passes based on
> > parameters you provide it.
> >
> > Each listing on that schedule gives you the time of Acquisition of Signal
> > (AOS) along with an azimuth position. It also lists time and azimuth for
> > maximum elevation, and time and azimuth for Loss of Signal (LOS). If you
> > have those data and a compass, you can "map" a pass in advance, which is
> > what I do. I note "landmarks" for AOS, mid pass and LOS, then simply turn
> > the compass on its side to check the angle at maximum elevation. From
there,
> > it's a matter of visualizing the satellite rising, moving across the sky
and
> > setting. Watching visible passes of the International Space Station is a
> > great way to get some visual practice to help when trying to "see" an
> > amateur satellite pass as it happens. You won't actually see the
satellite,
> > of course, but watching the ISS will give you an idea of how a satellite
> > moves across the sky - especially if you have a chance to watch passes
with
> > different maximum-elevation angles.
> >
> > My first handheld station included a Yaesu VX-7R HT and an Arrow, so I
have
> > literally hundreds of passes' worth of experience with that antenna. When
> > you're searching for the satellite, are you twisting your wrist to adjust
> > the position of the elements (i.e., the antenna's polariztion relative to
> > the satellite)? If not, you should try that. There have been more than a
few
> > times when a twist of the wrist made the difference for me in terms of
> > getting a new grid square, or not.
> >
> > I hope at least some of this proves helpful.
> >
> > 73,
> >
> > Tim - N3TL
> > AMSAT Member No. 36820
> > Athens, Ga. - EM84ha
> > -------------- Original message from "Eric Fort" <eric.fort@xxxxx.xxx>:
> > --------------
> >
> >
> > > I think I finally heard the ao-51 downlink sending some form of digital
> > data
> > > (likely sstv) this evening from DM14GK at 0218 GMT near the very end of
> > the
> > > pass. I had much trouble finding the bird and it took most of the pass
to
> >
> > > find. What can everyone suggest for making it progressively easier?
> > > Antenna is an arrow with duplexer feeding a vx-6 ht.
> > >
> > > Eric
> > >
> > > PS
> > >
> > > I'm curious, who's uplink was that?
> > > _______________________________________________
> > > 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
> >
> _______________________________________________
> 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
_________________________________________________________________
Color coding for safety: Windows Live Hotmail alerts you to suspicious email.
http://windowslive.com/Explore/Hotmail?ocid=TXT_TAGLM_WL_hotmail_acq_safety_11
2008
------------------------------
Message: 10
Date: Tue, 11 Nov 2008 12:54:46 +0100
From: "Wouter Jan Ubbels" <wjubbels@xxxxx.xxx>
Subject: [amsat-bb] Delfi-C3 primary data server not available
To: "Amsat-Bb@xxxxx. Org" <amsat-bb@xxxxx.xxx>
Message-ID:
<af4c9b1b0811110354q7527aa82p4d0e9a42bdf79ddd@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi all,
some of you may have already noticed that the Delfi-C3 primary data
server for submitting RASCAL telemetry is not running. The secondary
server will keep on running however, so we will get your telemetry!
73 on behalf of the Delfi-C3 / DO-64 team
Wouter Jan Ubbels
------------------------------
Message: 11
Date: Tue, 11 Nov 2008 04:39:27 -0800 (PST)
From: Michael Heim <kd0ar@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: working ao-51 (finding the bird)
To: n3tl@xxxxxxxxx.xxxx eric.fort@xxxxx.xxx
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <90643.22202.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Gentlemen,
I believe Orbitron is written in Java. I have linux, but I cant remember if
I've tried it in Linux, but if its in Java, it (should) work. Might want to
give it a try anyway, its pretty good, and I use it occasionally in Windows.
Sorry, I havent booted the linux box up in awhile. Maybe this evening I'll
try orbitron in Linux. Got me curious now.
Michael Heim
Chief Engineer, Forever Broadcasting
New Castle PA
WKST WJST WWGY
814-671-0666
Chapter Chair, SBE-122
ARS KD0AR
--- On Mon, 11/10/08, Eric Fort <eric.fort@xxxxx.xxx> wrote:
> From: Eric Fort <eric.fort@xxxxx.xxx>
> Subject: [amsat-bb] Re: working ao-51 (finding the bird)
> To: n3tl@xxxxxxxxx.xxx
> Cc: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
> Date: Monday, November 10, 2008, 11:41 PM
> Presently I'm using a vx-6 and a handheld arrow antenna.
> I'm getting my
> tracking information from the amsat website. I've
> downloaded gpredict for
> osx but have not got it running yet, mainly the price was
> right. if any of
> you have this running under osx I'd like to hear from
> you. for The
> forseeable future my station will run under unix so some
> version of predict
> seems like the likely choice. Other suggestions for
> tracking under unix are
> welcome, especially those which are low cost. orbitron and
> pcsat32 look
> nice but unfortunately they only run under windows.
>
> as for tracking I have been attempting to orient for best
> polorization but
> finding and keeping on the sat while tuning around is still
> somewhat
> difficult. one question though - Are bearings true or
> magnetic?
>
> Eric
> AF6EP
>
> On Mon, Nov 10, 2008 at 7:03 PM, <n3tl@xxxxxxxxx.xxx>
> wrote:
>
> > Hey Eric,
> >
> > What are you using to find the times and such for
> passes? Even if you're
> > only using a handheld station - which is all I used
> for months here with
> > good success - I would suggest downloading and
> installing one of the
> > tracking programs available online. SatPC32 is very
> good, especially if you
> > ultimately are going to use it to guide an az/el rotor
> setup and to tune
> > your radio(s) for Doppler. I am old school here, doing
> everything manually
> > (and will be for the foreseeable future), and I use a
> program called
> > Orbitron. I like it a lot for a number of reasons -
> not the least of which
> > is its ability to provide you with a schedule of
> upcoming passes based on
> > parameters you provide it.
> >
> > Each listing on that schedule gives you the time of
> Acquisition of Signal
> > (AOS) along with an azimuth position. It also lists
> time and azimuth for
> > maximum elevation, and time and azimuth for Loss of
> Signal (LOS). If you
> > have those data and a compass, you can "map"
> a pass in advance, which is
> > what I do. I note "landmarks" for AOS, mid
> pass and LOS, then simply turn
> > the compass on its side to check the angle at maximum
> elevation. From there,
> > it's a matter of visualizing the satellite rising,
> moving across the sky and
> > setting. Watching visible passes of the International
> Space Station is a
> > great way to get some visual practice to help when
> trying to "see" an
> > amateur satellite pass as it happens. You won't
> actually see the satellite,
> > of course, but watching the ISS will give you an idea
> of how a satellite
> > moves across the sky - especially if you have a chance
> to watch passes with
> > different maximum-elevation angles.
> >
> > My first handheld station included a Yaesu VX-7R HT
> and an Arrow, so I have
> > literally hundreds of passes' worth of experience
> with that antenna. When
> > you're searching for the satellite, are you
> twisting your wrist to adjust
> > the position of the elements (i.e., the antenna's
> polariztion relative to
> > the satellite)? If not, you should try that. There
> have been more than a few
> > times when a twist of the wrist made the difference
> for me in terms of
> > getting a new grid square, or not.
> >
> > I hope at least some of this proves helpful.
> >
> > 73,
> >
> > Tim - N3TL
> > AMSAT Member No. 36820
> > Athens, Ga. - EM84ha
> > -------------- Original message from "Eric
> Fort" <eric.fort@xxxxx.xxx>:
> > --------------
> >
> >
> > > I think I finally heard the ao-51 downlink
> sending some form of digital
> > data
> > > (likely sstv) this evening from DM14GK at 0218
> GMT near the very end of
> > the
> > > pass. I had much trouble finding the bird and it
> took most of the pass to
> >
> > > find. What can everyone suggest for making it
> progressively easier?
> > > Antenna is an arrow with duplexer feeding a vx-6
> ht.
> > >
> > > Eric
> > >
> > > PS
> > >
> > > I'm curious, who's uplink was that?
> > > _______________________________________________
> > > 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
> >
> _______________________________________________
> 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: 12
Date: Tue, 11 Nov 2008 08:30:52 -0500 (EST)
From: "Mark L. Hammond" <n8mh@xxxxxxxxxx.xxx>
Subject: [amsat-bb] AO-16 update 11 November 2008
To: amsat-bb <amsat-bb@xxxxx.xxx>
Cc: pacops <pacops@xxxxx.xxx>
Message-ID:
<1676456073.24351226410252652.JavaMail.root@xxxx.xxxxxx.xxxxxxx.xxx>
Content-Type: text/plain; charset=utf-8
Hello All,
An update on AO-16 is long overdue, so please accept my apologies for the
tardiness of the post. (Life is good, but busy!)
AO-16 has been in continuous voice operations since commanded back ON and
configured in voice mail on 15 Sept 2008 at 10:58 UTC. Our predictions
regarding sustained activities seem to be right on the mark. Recording your
observations about AO-16 at http://oscar.dcarr.org has been, and will continue
to be, very helpful to us. Please keep this up, especially over the 4 weeks.
Many of you will recall that the "best guess current model" is that a hardware
timer in AO-16 is firing when the craft is at a certain temperature, currently
around 15 deg C or cooler. When the space craft temperature is over 15 deg C,
the hardware timer behaves and continuous operations are sustained. The craft
temperature is dependent upon solar illumination. It appears that around 85%
illumination is the "magic number." If the orbit puts AO-16 with less than
85% illumination, the watchdog timer restarts the satellite, and the
transmitter shuts down.
Illumination projections (and subsequent temperature predictions) suggest that
we might be able to sustain operations until sometime in the window of
November 22 until December 4, 2008. So, if you want to make some AO-16
contacts, you had better get them as soon as possible!!!
Long term orbital projections suggest that if the satellite hardware remains
fundamentally unchanged (i.e., no deterioration of components on-board), it
will be nearly 10 years before AO-16 receives sufficient illumination to warm
up the spacecraft enough to again support sustained operations! You can be
sure that we'll continue to probe the craft with commands, in hopes that we
something will change in a good way that will allow us to use the bird for
operations of some sort.
It is possible that the transmitter on AO-16 will turn OFF sometime in the
next few days/weeks; this requires some commanding to get it running again,
which means a pass over the Eastern US coast is required for a change in
operational status. We expect that as the spacecraft cools down, transmitter
shutdowns will become more frequent.
Enjoy this grand old bird while you can!
Current operational mode for AO-16:
Mode FM Voice Repeater ( Downlink is DSB)
Uplink : 145.9200 MHz FM
Downlink 437.0260 MHz SSB
On behalf of the command team,
--
Mark L. Hammond [N8MH]
------------------------------
Message: 13
Date: Tue, 11 Nov 2008 06:19:46 -0800 (PST)
From: Michael Heim <kd0ar@xxxxxxxxx.xxx>
Subject: [amsat-bb] Re: working ao-51 (finding the bird)
To: n3tl@xxxxxxxxx.xxxx eric.fort@xxxxx.xxx
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <855918.65515.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Oops... I was wrong. I thought it was written in Java. I know there IS a
java tracker out there that is cross platform, but I cant remember which one
it was. Seemed like Orbitron was it...
I'll see if I can find the one I'm thinking of, and I'll post it here.
Michael Heim
Chief Engineer, Forever Broadcasting
New Castle PA
WKST WJST WWGY
814-671-0666
Chapter Chair, SBE-122
ARS KD0AR
--- On Tue, 11/11/08, Michael Heim <kd0ar@xxxxxxxxx.xxx> wrote:
> From: Michael Heim <kd0ar@xxxxxxxxx.xxx>
> Subject: [amsat-bb] Re: working ao-51 (finding the bird)
> To: n3tl@xxxxxxxxx.xxxx eric.fort@xxxxx.xxx
> Cc: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
> Date: Tuesday, November 11, 2008, 7:39 AM
> Gentlemen,
>
> I believe Orbitron is written in Java. I have linux, but I
> cant remember if I've tried it in Linux, but if its in
> Java, it (should) work. Might want to give it a try anyway,
> its pretty good, and I use it occasionally in Windows.
>
> Sorry, I havent booted the linux box up in awhile. Maybe
> this evening I'll try orbitron in Linux. Got me curious
> now.
>
> Michael Heim
> Chief Engineer, Forever Broadcasting
> New Castle PA
> WKST WJST WWGY
> 814-671-0666
> Chapter Chair, SBE-122
> ARS KD0AR
>
>
> --- On Mon, 11/10/08, Eric Fort <eric.fort@xxxxx.xxx>
> wrote:
>
> > From: Eric Fort <eric.fort@xxxxx.xxx>
> > Subject: [amsat-bb] Re: working ao-51 (finding the
> bird)
> > To: n3tl@xxxxxxxxx.xxx
> > Cc: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
> > Date: Monday, November 10, 2008, 11:41 PM
> > Presently I'm using a vx-6 and a handheld arrow
> antenna.
> > I'm getting my
> > tracking information from the amsat website. I've
> > downloaded gpredict for
> > osx but have not got it running yet, mainly the price
> was
> > right. if any of
> > you have this running under osx I'd like to hear
> from
> > you. for The
> > forseeable future my station will run under unix so
> some
> > version of predict
> > seems like the likely choice. Other suggestions for
> > tracking under unix are
> > welcome, especially those which are low cost.
> orbitron and
> > pcsat32 look
> > nice but unfortunately they only run under windows.
> >
> > as for tracking I have been attempting to orient for
> best
> > polorization but
> > finding and keeping on the sat while tuning around is
> still
> > somewhat
> > difficult. one question though - Are bearings true
> or
> > magnetic?
> >
> > Eric
> > AF6EP
> >
> > On Mon, Nov 10, 2008 at 7:03 PM,
> <n3tl@xxxxxxxxx.xxx>
> > wrote:
> >
> > > Hey Eric,
> > >
> > > What are you using to find the times and such for
> > passes? Even if you're
> > > only using a handheld station - which is all I
> used
> > for months here with
> > > good success - I would suggest downloading and
> > installing one of the
> > > tracking programs available online. SatPC32 is
> very
> > good, especially if you
> > > ultimately are going to use it to guide an az/el
> rotor
> > setup and to tune
> > > your radio(s) for Doppler. I am old school here,
> doing
> > everything manually
> > > (and will be for the foreseeable future), and I
> use a
> > program called
> > > Orbitron. I like it a lot for a number of reasons
> -
> > not the least of which
> > > is its ability to provide you with a schedule of
> > upcoming passes based on
> > > parameters you provide it.
> > >
> > > Each listing on that schedule gives you the time
> of
> > Acquisition of Signal
> > > (AOS) along with an azimuth position. It also
> lists
> > time and azimuth for
> > > maximum elevation, and time and azimuth for Loss
> of
> > Signal (LOS). If you
> > > have those data and a compass, you can
> "map"
> > a pass in advance, which is
> > > what I do. I note "landmarks" for AOS,
> mid
> > pass and LOS, then simply turn
> > > the compass on its side to check the angle at
> maximum
> > elevation. From there,
> > > it's a matter of visualizing the satellite
> rising,
> > moving across the sky and
> > > setting. Watching visible passes of the
> International
> > Space Station is a
> > > great way to get some visual practice to help
> when
> > trying to "see" an
> > > amateur satellite pass as it happens. You
> won't
> > actually see the satellite,
> > > of course, but watching the ISS will give you an
> idea
> > of how a satellite
> > > moves across the sky - especially if you have a
> chance
> > to watch passes with
> > > different maximum-elevation angles.
> > >
> > > My first handheld station included a Yaesu VX-7R
> HT
> > and an Arrow, so I have
> > > literally hundreds of passes' worth of
> experience
> > with that antenna. When
> > > you're searching for the satellite, are you
> > twisting your wrist to adjust
> > > the position of the elements (i.e., the
> antenna's
> > polariztion relative to
> > > the satellite)? If not, you should try that.
> There
> > have been more than a few
> > > times when a twist of the wrist made the
> difference
> > for me in terms of
> > > getting a new grid square, or not.
> > >
> > > I hope at least some of this proves helpful.
> > >
> > > 73,
> > >
> > > Tim - N3TL
> > > AMSAT Member No. 36820
> > > Athens, Ga. - EM84ha
> > > -------------- Original message from "Eric
> > Fort" <eric.fort@xxxxx.xxx>:
> > > --------------
> > >
> > >
> > > > I think I finally heard the ao-51 downlink
> > sending some form of digital
> > > data
> > > > (likely sstv) this evening from DM14GK at
> 0218
> > GMT near the very end of
> > > the
> > > > pass. I had much trouble finding the bird
> and it
> > took most of the pass to
> > >
> > > > find. What can everyone suggest for making
> it
> > progressively easier?
> > > > Antenna is an arrow with duplexer feeding a
> vx-6
> > ht.
> > > >
> > > > Eric
> > > >
> > > > PS
> > > >
> > > > I'm curious, who's uplink was that?
> > > >
> _______________________________________________
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> expressed
> > are those of the author.
> > >
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> > > program!
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> > >
> > _______________________________________________
> > 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!
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> _______________________________________________
> 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!
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------------------------------
_______________________________________________
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!
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End of AMSAT-BB Digest, Vol 3, Issue 582
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