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CX2SA > SATDIG 30.11.10 21:14l 588 Lines 21541 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: UHF antenna help (Mark L. Hammond)
2. Tracking Software (Michael)
3. Re: UHF antenna help (Alan P. Biddle)
4. Re: UHF antenna help (David Palmer)
5. ] Re: unitrack 2004 (Tom Schuessler)
6. Re: Network of MEO sats at 8000km (Auke de Jong, VE6PWN)
7. Re: unitrack 2004 (Dale Hershberger)
8. Re: O/OREOS TLE errors ? (Ryan Caron)
9. Re: Tracking Software (Bob- W7LRD)
10. Re: O/OREOS TLE errors ? (PA3GUO)
----------------------------------------------------------------------
Message: 1
Date: Tue, 30 Nov 2010 08:02:28 -0500
From: "Mark L. Hammond" <marklhammond@xxxxx.xxx>
Subject: [amsat-bb] Re: UHF antenna help
To: zm1267@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Message-ID: <dR2a1f00D56cfur05R2ev7@xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Hi Larry,
Have you determined that your pre-amp is still working?? I'd do that first.
I have found the 436CP30 to be a good antenna.
73,
Mark N8MH
At 08:14 PM 11/29/2010 -0500, larry wrote:
>Good evening,
>
> Name here is Larry, N1MIW. I recently moved to a better (higher) QTH and
>finally got around to setting up the satellite station "almost" like it used
>to be, but am experiencing some reception difficulties on UHF. I'm hoping
>someone out here can help me diagnose what I'm doing wrong, or what the
>problem is. I am using a Yaesu FT-847 which is computer controlled, as well
>as the Yaesu G-5400 rotator. The antennas are mounted on a solid fiberglass
>mast only ~17 feet off the ground, and fed with LMR-400. The frequencies are
>correct for the satellite I want to use.
>
> My problem is with the 436CP30 antenna. I cannot seem to find good
>results with it since my move - terrestrial or sat related. My SWR is around
>1.5:1 at 435MHz, and the polarity switch is working. I tried changing
>feedlines and removing the pre-amp, but I still cannot seem to make it work
>correctly. I am trying to receive SO-50 D/L, and VO-52 U/L, but both are
>just not working like I remember it being before the move. I don't have any
>broken or mis-aligned elements (that I noticed - I'll look again). The only
>thing I was looking into was instead of having it placed on the boom in a
>"+" pattern was making it an "x" pattern - would that make a difference? I
>don't remember hearing or reading about that anywhere, so I was looking for
>your opinion.
>
> On a side note, what's your opinion of this antenna? Like I said, I used
>to have good luck with it, but I'm not sure what's different, except the new
>home. Should I get "horizon" to "horizon" coverage (plus or minus a few
>degrees)? Oh, I also looped the coax off the back like the manual states,
>but the improvement is very minimal. I checked the "jumpers" at the tuning
>box, and they seem OK too.
>
> I'm running out of ideas, and any guidance would be appreciated. Thanks &
>looking forward to working the birds again!
>
>73's... Larry N1MIW
>
>_______________________________________________
>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
Mark L. Hammond [N8MH]
------------------------------
Message: 2
Date: Tue, 30 Nov 2010 08:36:29 -0500
From: "Michael" <mikef1234@xxxxxxxxxxxxxxx.xxx>
Subject: [amsat-bb] Tracking Software
To: <AMSAT-BB@xxxxx.xxx>
Message-ID: <AA4C09411BB54341A42A913EE7AB743F@xxxxxxxxxxxxx>
Content-Type: text/plain; charset="Windows-1252"
I was wondering if someone could give me the pros and cons of the tracking
software. I have orbitron, the one from amsat ( can't think of the name )
then I see ARRL has a software. What are the pro's and cons on these three
and are there more ?
Mike N8GBU
------------------------------
Message: 3
Date: Tue, 30 Nov 2010 08:08:06 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
Subject: [amsat-bb] Re: UHF antenna help
To: <zm1267@xxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <2173A991EB664419AF540DA6427479A3@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Larry,
A couple of others things to check after working through all the other great
suggestions.
You did not mention how you moved it. Assuming you only broke it down to
the boom sections, are the various phasing cables still good? There are a
couple of places where you have to pull them very tight, and with a sharp
bend, to get them to fit. Those could use checking. As someone else noted,
the SWR is not that high, and if one of those were broken, I would expect
things to be more obvious.
The other area to check is the aluminum blocks which are the folded dipole
feeds. About two years ago, I noticed that rear driven element was slightly
but obviously crooked. The SWR measured by my Bird was about 1.8:1. I
brought it inside and opened the aluminum box. Sure enough, that was the
problem. One of the connections was loose, and the element was not
internally supported or connected. (Best theory is a bird flew into it. I
have had 2 other such incidents over the years, complete with blood and
feathers, and in one case a dead hawk.) However, what surprised and
appalled me was that the broken connection was a solder bridge, and a very
obvious one! We are talking something which even MFJ "quality control"
would reject. However, it would have been possible for the mechanical
connection to be good, with the electrical connection still bad. I am
thinking there is a possibility, slight though it is, that yours might have
gotten bumped in transport. It is not robust at all. I repaired the
connection better than new, and all is well. The next time I take down the
antennas, I will crack them all open and check.
Something to check if all the probable stuff fails.
73s es gud luck!
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of larry
Sent: Monday, November 29, 2010 7:14 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] UHF antenna help
Good evening,
Name here is Larry, N1MIW. I recently moved to a better (higher) QTH and
finally got around to setting up the satellite station "almost" like it used
to be, but am experiencing some reception difficulties on UHF. I'm hoping
someone out here can help me diagnose what I'm doing wrong, or what the
problem is. I am using a Yaesu FT-847 which is computer controlled, as well
as the Yaesu G-5400 rotator. The antennas are mounted on a solid fiberglass
mast only ~17 feet off the ground, and fed with LMR-400. The frequencies are
correct for the satellite I want to use.
My problem is with the 436CP30 antenna. I cannot seem to find good
results with it since my move - terrestrial or sat related. My SWR is around
1.5:1 at 435MHz, and the polarity switch is working. I tried changing
feedlines and removing the pre-amp, but I still cannot seem to make it work
correctly. I am trying to receive SO-50 D/L, and VO-52 U/L, but both are
just not working like I remember it being before the move. I don't have any
broken or mis-aligned elements (that I noticed - I'll look again). The only
thing I was looking into was instead of having it placed on the boom in a
"+" pattern was making it an "x" pattern - would that make a difference? I
don't remember hearing or reading about that anywhere, so I was looking for
your opinion.
On a side note, what's your opinion of this antenna? Like I said, I used
to have good luck with it, but I'm not sure what's different, except the new
home. Should I get "horizon" to "horizon" coverage (plus or minus a few
degrees)? Oh, I also looped the coax off the back like the manual states,
but the improvement is very minimal. I checked the "jumpers" at the tuning
box, and they seem OK too.
I'm running out of ideas, and any guidance would be appreciated. Thanks &
looking forward to working the birds again!
73's... Larry N1MIW
_______________________________________________
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: 4
Date: Tue, 30 Nov 2010 08:09:11 -0800
From: David Palmer <dave@xxxx.xxx>
Subject: [amsat-bb] Re: UHF antenna help
To: zm1267@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<AANLkTinunHi=z44m3WXrYO7RSFXx+4zJsrTzBHFaY-1z@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Larry,
Lots of excellent advice so far! I'll throw in one more thing to check:
> I am trying to receive SO-50 D/L, and VO-52 U/L, but both are
> just not working like I remember it being before the move.
You didn't mention it, but be sure you're tuning up and down a little
for SO-50 just in case the frequency settings in your PC software
aren't matching the satellite anymore. I was having fits trying to
receive SO-50 for a while, turned out that for some reason I need to
program in my SatPC32 (doppler.sqf file) a downlink frequency 5 kHz
lower than published (even though there are reports of some stations
observing SO-50 with a downlink frequency 5 kHz higher than
published). I just use multiple SO-50 entries in my software, one at
published frequency, one +5, one -5, and one -10, and choose whichever
one works best on a given pass. Haven't noticed this with the other
birds, and this wont' explain your problems with VO-52 (assuming
youv'e calibrated for default uplink/downlink offset already of
course).
Anyway, that was my experience, just wanted to share in case it helps!
73 de Dave KB5WIA / CM88
ARRL / AMSAT
Elk + 2xFT817ND + SatPC32
------------------------------
Message: 5
Date: Tue, 30 Nov 2010 11:06:30 -0600
From: "Tom Schuessler" <tjschuessler@xxxxxxx.xxx>
Subject: [amsat-bb] ] Re: unitrack 2004
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000301cb90b0$eea53780$cbefa680$@xxx>
Content-Type: text/plain; charset=US-ASCII
On the comment on using the Virtual PC for Windows 7 to run an XP emulation,
This add on will not work with any version of Windows 7 Home, either 32 or
64 but will need to be at least Windows 7 Professional. This unless anybody
has a hack to make the download think it is running on the Business platform
instead of Home.
Tom Schuessler
2713 Lake Gardens Drive
Irving, Texas 75060
972-986-7456
214-403-1464 (Cell)
n5hyp@xxxx.xxx
_____________________________________________________
At 05:34 PM 11/29/2010 -0900, Dale Hershberger wrote:
>I need some help. I recently acquired a new HP 64 bit computer that has
>win 7 home
>OS. I tried to load the unitrack software and it would not permit me to
>do it. I have ordered
>
>a LVB tracker from AMSAT and not received it yet. I have tried to
>download the latest
>upgrades from Unitrack but can not install on the 64 bit machine. Any
>help would be
>appreciated.
>
>73,
>Dale/KL7XJ
------------------------------
Message: 6
Date: Tue, 30 Nov 2010 11:10:07 -0700
From: "Auke de Jong, VE6PWN" <sparkycivic@xxxx.xx>
Subject: [amsat-bb] Re: Network of MEO sats at 8000km
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000801cb90b9$d1fcb460$7300a8c0@xxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
This has me wondering if there are opportunities for co-launch, tethered
power supply sharing or upper-stage rocket-body piggybacking of Ham and
educational communication payloads....... our price per Kg could be REALLY
attractive given that they're launching four 700Kg birds PER launch! How
much fun could we have with a triple cube at these heights? Passes would be
visible for over an hour at a time... Cali could work the Gold Coast and
JA's at the same time!
----- Original Message -----
From: "Trevor ." <m5aka@xxxxx.xx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Monday, November 29, 2010 2:25 PM
Subject: [amsat-bb] Network of MEO sats at 8000km
> 03B networks is planning to launch a network of 20-24 satellites into a
> 8000km equitorial orbit on Soyuz rockets from Kourou in the Caribbean.
>
> http://www.o3bnetworks.com/Media_Centre/press_release_details.aspx?id=60
> http://www.o3bnetworks.com/Media_Centre/press_release_details.aspx?id=67
>
> Trevor
>
>
>
>
>
>
> _______________________________________________
> 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
>
>
> -----
> No virus found in this message.
> Checked by AVG - www.avg.com
> Version: 10.0.1170 / Virus Database: 426/3288 - Release Date: 11/29/10
>
------------------------------
Message: 7
Date: Tue, 30 Nov 2010 09:19:03 -0900
From: Dale Hershberger <daleh@xxxxxx.xxx>
Subject: [amsat-bb] Re: unitrack 2004
To: amsat bbs <amsat-bb@xxxxx.xxx>
Message-ID: <4CF54017.1040900@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Thanks to all for the suggestions. I can't wait until the new box
arrives (LVB). I don't
want to move my old computer back in place of the new one.
In the mean time it is a manual operation...left-right, up-down with
the controller
for the G5500 rotors.
Thanks again.
Dale/KL7XJ
On 11/29/2010 5:34 PM, Dale Hershberger wrote:
> I need some help. I recently acquired a new HP 64 bit computer that has
> win 7 home
> OS. I tried to load the unitrack software and it would not permit me to
> do it. I have ordered
>
> a LVB tracker from AMSAT and not received it yet. I have tried to
> download the latest
> upgrades from Unitrack but can not install on the 64 bit machine. Any
> help would be
> appreciated.
>
> 73,
> Dale/KL7XJ
> _______________________________________________
> 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, 30 Nov 2010 10:21:58 -0800
From: Ryan Caron <rcaron@xxxxx.xxx>
Subject: [amsat-bb] Re: O/OREOS TLE errors ?
To: amsat-bb@xxxxx.xxxx PA3GUO <pa3guo@xxxxxxx.xx>
Message-ID: <4CF540C6.7060103@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
The O/OREOS TLEs consistently do not have valid checksums (last digit of
each line). I submitted a comment about this on their website but I have
not heard back. The correct checksums are 2 & 3, and not the 6 & 5 that
is listed.
If, by the time you read this, the posted TLEs are not 6 & 5, then the
TLEs have been updated and you'll have to generate new checksums. The
formula is a sum of all numerical characters on the line, including the
line number, treating minus signs as a one and everything else (letters,
+, spaces) as a 0. Then take modulus 10 of the sum (i.e. last digit of
the sum). Look it up on wikipedia for more details.
I've made a spreadsheet to fix this, but it is still a manual operation
for me (got to write a script at some point). Some programs disregard
the the checksum, which is why HRD & the website still work and your
tracking tool doesn't. Predict/GPredict, my tools of choice, require
valid checksums, making proper TLEs a pet peeve of mine. I don't know
what NOVA's up to.
In terms of "swarm spread" (i.e. how small delta-V between spacecraft
that shared the same ride, which in this case is just done by compressed
springs, translates into spatial differences), 35 minutes of separation
is pretty high for just 10 days after launch. With all the latest TLEs
from the three websites, I show O/OREOS being 3.5 minutes ahead of RAX,
and RAX being a 1.33 minutes ahead of FAST1/2.
Ryan, KB1LKI
On 11/30/10 4:54 AM, amsat-bb-request@xxxxx.xxx wrote:
> ------------------------------
>
> Message: 4
> Date: Mon, 29 Nov 2010 22:55:16 +0100
> From: PA3GUO<pa3guo@xxxxxxx.xx>
> Subject: [amsat-bb] O/OREOS TLE errors ?
> To:amsat-bb@xxxxx.xxx
> Message-ID:<19767175.1291067716437.JavaMail.root@xxxxxxxx.xxxxxx.xx>
> Content-Type: text/plain; charset=utf-8
>
> Dear all,
>
> I keep on having troubles with the O/OREOS kepler sets.
> RAX and the others are fine.
>
> With todays version (as from the O/OREOS dashboard on the web)
> - NOVA gives O/OREOS just a bit behind RAX
> - HamRadioDeluxe give O/OREOS 35 minutes behind RAX
> - The O/OREOS web (dashboard graphic) shows O/OREOS 35 minutes behind RAX
> - My private antenna tracking tool does not recognize the keplerset of
O/OREOS
>
> Anyone else has experienced this (and maybe even a solution) ?
> Henk
> --
> Henk, PA3GUO
>
------------------------------
Message: 9
Date: Tue, 30 Nov 2010 19:31:17 +0000 (UTC)
From: Bob- W7LRD <w7lrd@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Tracking Software
To: Michael <mikef1234@xxxxxxxxxxxxxxx.xxx>
Cc: AMSAT-BB@xxxxx.xxx
Message-ID:
<261275568.1662615.1291145477898.JavaMail.root@xxxxxxx.xxxxxxxxxx.xx.xxxx.xxxx
xxx.xxx>
Content-Type: text/plain; charset=utf-8
Satpc32 from AMSAT, has excellent after purchase support, AMSAT gets all the
money (rocket science ain't) cheap, the learning curve is easy, runs my LVB
tracker perfectly.? The only problem I have is entering new keps that aren't
already in the downloadable database.
73 Bob W7LRD
Seattle
----- Original Message -----
From: "Michael" <mikef1234@xxxxxxxxxxxxxxx.xxx>
To: AMSAT-BB@xxxxx.xxx
Sent: Tuesday, November 30, 2010 5:36:29 AM
Subject: [amsat-bb] ?Tracking Software
I was wondering if someone could give me the pros and cons of the tracking
software. I have orbitron, the one from amsat ( can't think of the name )
then I see ARRL has a software. What are the pro's and cons on these three
and are there more ?
Mike ? N8GBU
_______________________________________________
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: 10
Date: Tue, 30 Nov 2010 20:33:19 +0100
From: PA3GUO <pa3guo@xxxxxxx.xx>
Subject: [amsat-bb] Re: O/OREOS TLE errors ?
To: amsat-bb@xxxxx.xxxx Ryan Caron <rcaron@xxxxx.xxx>
Message-ID: <11414707.1291145601523.JavaMail.root@xxxxxxxx.xxxxxx.xx>
Content-Type: text/plain; charset=utf-8
Hi Ryan
Thanks a lot for your detailed reply.
Would you be so kind to share that spreadsheet (XLS?) with me ?
In the coming days I really need (well, would higly appreciate) to
have working TLEs - especially also for Nanosail.
Best of course would be if the O/OREOS/Nanasail team could fix this prior
to posting them on the web :-)
Thanks
Henk
---- Ryan Caron <rcaron@xxxxx.xxx> schreef:
> The O/OREOS TLEs consistently do not have valid checksums (last digit of
> each line). I submitted a comment about this on their website but I have
> not heard back. The correct checksums are 2 & 3, and not the 6 & 5 that
> is listed.
>
> If, by the time you read this, the posted TLEs are not 6 & 5, then the
> TLEs have been updated and you'll have to generate new checksums. The
> formula is a sum of all numerical characters on the line, including the
> line number, treating minus signs as a one and everything else (letters,
> +, spaces) as a 0. Then take modulus 10 of the sum (i.e. last digit of
> the sum). Look it up on wikipedia for more details.
>
> I've made a spreadsheet to fix this, but it is still a manual operation
> for me (got to write a script at some point). Some programs disregard
> the the checksum, which is why HRD & the website still work and your
> tracking tool doesn't. Predict/GPredict, my tools of choice, require
> valid checksums, making proper TLEs a pet peeve of mine. I don't know
> what NOVA's up to.
>
> In terms of "swarm spread" (i.e. how small delta-V between spacecraft
> that shared the same ride, which in this case is just done by compressed
> springs, translates into spatial differences), 35 minutes of separation
> is pretty high for just 10 days after launch. With all the latest TLEs
> from the three websites, I show O/OREOS being 3.5 minutes ahead of RAX,
> and RAX being a 1.33 minutes ahead of FAST1/2.
>
> Ryan, KB1LKI
>
> On 11/30/10 4:54 AM, amsat-bb-request@xxxxx.xxx wrote:
> > ------------------------------
> >
> > Message: 4
> > Date: Mon, 29 Nov 2010 22:55:16 +0100
> > From: PA3GUO<pa3guo@xxxxxxx.xx>
> > Subject: [amsat-bb] O/OREOS TLE errors ?
> > To:amsat-bb@xxxxx.xxx
> > Message-ID:<19767175.1291067716437.JavaMail.root@xxxxxxxx.xxxxxx.xx>
> > Content-Type: text/plain; charset=utf-8
> >
> > Dear all,
> >
> > I keep on having troubles with the O/OREOS kepler sets.
> > RAX and the others are fine.
> >
> > With todays version (as from the O/OREOS dashboard on the web)
> > - NOVA gives O/OREOS just a bit behind RAX
> > - HamRadioDeluxe give O/OREOS 35 minutes behind RAX
> > - The O/OREOS web (dashboard graphic) shows O/OREOS 35 minutes behind RAX
> > - My private antenna tracking tool does not recognize the keplerset of
O/OREOS
> >
> > Anyone else has experienced this (and maybe even a solution) ?
> > Henk
> > --
> > Henk, PA3GUO
> >
--
Henk, PA3GUO
------------------------------
_______________________________________________
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 473
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