Has anyone located a driver for the LVB Tracker internal USB to serial
port adapter on Windows 7 x64?
If not, has anyone reverted to the serial port connection on LVB Tracker
and used an external USB to serial port adapter successfully with
SatPC32 on Windows 7 x64?
I have an Edgeport multiple USB to serial port that has drivers for
Windows 7 x64 that I will use if I have to. I would prefer using the LVB
Tracker with its USB to serial adapter if someone has another solution.
Here is a quick AO-16 update. On Sunday I turned AO-16 long enough to
get some telemetry packets. The satellite would remain on for less
than one minute after being commanded on. A quick test of the "bent
pipe" voice mode repeater was successful. . The "hardware watchdog
timer problem" is still evident; as expected, spacecraft temperatures
are insufficient to keep the transmitter ON (needs to be above 15 deg
Orbit projections suggest that satellite illumination conditions will
not result in increased temperatures for nearly 10 years. Command
stations do periodically turn AO-16 "ON" to check on its condition and
see if the hardware timer problem has "automagically" fixed itself
(which in not anticipated, but who knows...).
3 Oct 2010 1838 utc
PACSAT MBL Telemetry Decoder Ver. 1.3 (c) Mike Rupprecht, DK3WN
+10V Battery Bus : 0.00 V
Battery Charge Reg : 0.55 mA
Base Temp : 9.07 °C
PSK RF Out : 1.90 W
+5V RX Bus : 4.87 V
+8.5V RX Bus : 8.49 V
+10V RX Bus : 11.24 V
Here is another teaser :) Several months ago I commanded the AO-16
S-band transmitter ON; it too remains functional (albeit weak), and
was received by me, Drew KO4MA, and Alan WA4SCA.
Mark L. Hammond [N8MH]
Technical papers are solicited for presentation at the 26th Annual ARRL
and TAPR Digital Communications Conference to be held September 28-30,
2007 in Hartford, Connecticut. These papers will also be published in
the Conference Proceedings (you do NOT need to attend the conference to
have your paper included in the Proceedings). The submission deadline is
July 31, 2007. Please send papers to:
225 Main St
Newington, CT 06111
or you can make your submission via e-mail to: maty(a)arrl.org
Papers will be published exactly as submitted and authors will retain
73 . . . Steve, WB8IMY
I have both a commercial and a homebrew Eggbeater and am disappointed with both, especially in light of its rather high price. Connected to my IC-7000 via an ARR mast-mounted preamp, performance is far less than with an HT and an Arrow. Guess an omni can't cut it, at least not from my QTH.
Maybe if I could get it up higher, clear of all roofs, it would do better. I can make contacts at relatively high sat elevations, but can do just as well with a $10 dual band ground plane. My friend has an Eggbeater and the same preamp at a clearer QTH, and he hears substantially better, down to 10 degrees elevation in some directions.
Good luck and 73,
> > Hi Steve,
> > It is surprising to read that you are not hearing
> anything. I have
> > repeatedly used a 2m and 70cm Eggbeater for the sats
> and have had no
> > problem hearing things. No pre-amp.
> > I was using a short cable (e.g. less than 10 meters).
> The rigs I
> > used were a FT-736r (deaf) and a FT-847 (so-so).
> > 73,
> > Dave
Has anyone successfully increased the maximum FM deviation of the 910H when
using the 9600 setting on the radio? We have not been able to. We have
two units, and one is maxed at 2.5 KHz and the other at 3.2 KHz deviation.
We've used the service manual to adjust the deviation to max higher values
(>7KHz). But, this doesn't affect the 9600 input path. Looking through
the service manual, on page 10-1 lower left corner, it shows that the gain
control we just set doesn't affect the 9600 path.
So, I'm thinking of modifying the over modulation detection circuitry to
allow for a larger peak to peak voltage signal to be input. The components
that see that voltage appear to be able to handle it.
Has anyone tried this, or know of another way to increase the deviation?
I totally agree with you James... the process is a continuous evolution.
I did my prediction on October 6th for the "Chicken Little Competition" and
my date was January 23rd 2012.
It surprisingly agrees with your prediction done almost one month later,
this make me think that my assumptions were right, up to now at least.
Thanks for the update on your AMSAT Journal article.
There are several people on the bb who are following this topic and are
Any futher thoughts you have, as we move towards January would, I am sure
73 John G7HIA
From: DeYoung James <deyoung_james(a)yahoo.com>
To: amsat-bb <amsat-bb(a)amsat.org>
Sent: Tuesday, 15 November, 2011 17:29:31
Subject: [amsat-bb] ARISSat-1 (37772) decay
First, thank you Mineo for reading the AMSAT Journal and making several of
on your web site.
My AMSAT Journal
paper published in the March/April 2011 issue is actually still fairly valid
for the scenarios shown in the paper. The solar flux has turned out to be
somewhat higher than was used/predicted in the paper. This has caused the
atmospheric densities to be higher which results in higher decay rates.
wrote the paper I had this nagging feeling that stopping the
scenarios at 370-km was not going to be high enough. We are very fortunate
the ISS was boosted to such a height before release of ARISSat-1 and not
There is a
valuable lesson, I think, to be made with respect to predicting satellite
dates far into the future. The future state of the atmosphere, i.e. the
atmospheric density that the satellite will pass through is poorly
in the long-term, say starting greater than a week or two into the future.
Predictions of satellite decay dates months in the future should be
evaluated with the understanding that your date of prediction errors may be
large. The errors
are due to the future uncertainties of the orbital path which
grow quickly with time in a prediction. The atmospheric density is not the
source of error. Your orbit model, the integrator, and the accounting of
drag forces among others will affect your results.
satellite decay dates are not do-and-forget. The general process is to make
prediction, get new measured observations of the height in the future, and
some point re-do your prediction when the errors become significant to you.
With that all
said here is my current prediction using the same tools used in the AMSAT J.
paper and produced as of 2011 November 13th. The decay of ARISSat-1 (37772)
will happen nominally on 2012 January 30th with a 10% rule-of-thumb error
allowance of 18 days around this date. The
errors may be larger than the rule-of-thumb indicates!
Sent via AMSAT-BB(a)amsat.org. Opinions expressed are those of the author.
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Good to hear FO29 back operating over the US!
Lets not forget that our flying friends are fragile and we need to keep
looking to the future and the need for replacements.
We may get another miracle and have one of the crippled birds come back
to life in the future, but do we really want to depend on chance?
This is a hobby and we will always be considered "second banana" when it
comes to getting help to fund a launch.
Write someone, call someone, offer to help or heaven forbid try and find
an extra dollar or two to donate.
I don't know where best to use anyone's talents or their monies but I do
know this, if we do nothing there won't be someone come along and say, "
we need an amateur satellite, lets launch one!" We need to take the
initiative and get another satellite on the launch pad and then beg,
borrow or steal a ride into space.
A very Happy New Year to everyone and lets get behind some of these
satellites and find a way to get them launched!
All the talk about SSTV from this bird got me thinking I'd like to try!
I downloaded MMSSTV and installed.
What are the best settings to use in the setup page for decent copy of photos from ARRISAT-1?
I did copy pix on 14.230 after setup as a test run...but on last pass of ARRISAT, had wonderful copy of voice beacon but no pictures decoded.
So wonder what I might be doing wrong.
Any help appreciated.
Just worked K3SZH, KG7EZ, and N9AMW on FO-29 orbit #75918 starting at 1749z.
This was a high elevation pass for me and signals were very strong with only
sent from my Apple IMac
Nice and strong on the 1812 pass here in EL88. It looks like the batts are good enough to get through eclipse. Maybe we ought to limit use when it's not illuminated?
73, Drew KO4MA
>From: Ib Christoffersen <oz1my(a)privat.dk>
>Sent: Dec 31, 2011 11:35 AM
>Subject: [amsat-bb] FO-29 heard by several European stations
>At the report page several European stations report FO-29 on.
>She worked very well. Any comment from our Japanese friends ?
>Happy New Year to all.
>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