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CX2SA > SATDIG 12.10.09 20:46l 944 Lines 33495 Bytes #999 (0) @ WW
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Today's Topics:
1. Re: Can we get them to fix AO-40 first then? (Larry)
2. Re: Road Trip finally comes to an end (Jeff Yanko)
3. Re: Can we get them to fix AO-40 first then? (Greg D.)
4. thanks (Nick Pugh K5QXJ)
5. Re: PCSAT still kicking (Bob Bruninga )
6. Re: thanks (Bob Martinson)
7. Re: Not everyone is working on ARISSat-1 . . . . The AMSAT
NextGen Spacecraft Bus (Alex, N3SQ)
8. Re: Can we get them to fix AO-40 first then? (John P. Toscano)
9. Re: Last Ditch Effort (Randy)
10. FM satellite operations again again over Europe (OZ1MY)
11. Re: accidental RF into wrong cable of Arrow=bad duplexer?
(Elan Portnoy)
12. Re: Can we get them to fix AO-40 first then? (Luc Leblanc)
13. Re: accidental RF into wrong cable of Arrow=bad duplexer? (P.H.)
14. an interesting article on "bleep sats" (Rocky Jones)
15. Yaesu GS-232B Problems Connecting (Nathaniel S. Parsons)
16. Re: FM satellite operations again again over Europe
(Eric Knaps, ON4HF)
----------------------------------------------------------------------
Message: 1
Date: Mon, 12 Oct 2009 02:26:36 -0400
From: "Larry" <n1miw@xxx.xxx>
Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?
To: <amsat-bb@xxxxx.xxx>
Message-ID: <689EED2372B74EA59A94CF6358059535@xxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
I would want to take the "chance" of trying to open those 4 solar panels,
even if it was to "see what happens". I don't know the exact layout of the
equipment on board, but opening those panels just might trigger something
good to happen. At this point, there really isn't anything to lose. Who
knows? Opening the panels might expose the batteries to more heat from the
sun, which could possibly cause them to "open" quicker, or if the
orientation of AO-40 is off, the extra panels might receive enough light to
get that IHU working again. Or if there's a short due to the "event", moving
the panels may remove the short (or fix an open). Do any of the command
stations want to elaborate on why the panels have remained retracted? Has
this been discussed? Of course, this is all depending on if the receiver
will accept the command in the first place...
I would wonder about the sensors picking up light inside the spacecraft
too. Doesn't sound possible that telemetry would still be able to report
this if there's holes in the craft.
I'm only questioning opening the panels because it seems like it's the
only possible thing left to try to resurrect the bird, but nobody wants to
make the decision - "just in case", which is understandable too. But I'd say
go for it since there's nothing else to try & she's been silent for a while
now.
Just my 2 cents worth. Keeping my fingers crossed that AO-40 comes back!...
Larry
>Four of the solar panels are retractable but not released. Please see some
>old pictures.
>As the orientation of AO-40 is not known it is better that the panels are
>kept around the satellite. If they still exists...
>There is enough power from a single panel to run IHU and some beacon if
>the bus wires and electronics are not damaged. Some sensors indicated that
>sun is shining into the satellite so there may be big hole(s) in it.
>Not sure about that raport though. Have to check out that.
>The beacons were loud with the omnis and data was easily received with
>rubber duck and hand held radio. Miss that fine telemetry sound.
>
>I have allways said that the world would be different if AO-40 were alive.
>
>Jari, OH3UW
------------------------------
Message: 2
Date: Sun, 11 Oct 2009 23:35:48 -0700
From: "Jeff Yanko" <wb3jfs@xxx.xxx>
Subject: [amsat-bb] Re: Road Trip finally comes to an end
To: <w6zkh@xxxxxxx.xxx>, "amsat-bb" <amsat-bb@xxxxx.xxx>
Message-ID: <312A6B513077481CA00D55C1145D6EE3@xxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi John,
Good trip. I only worked you a couple of times but that's good considering
the time available to me. :) You've made a number of people happy with some
new grids and or new states.
73,
Jeff WB3JFS
----- Original Message -----
From: <w6zkh@xxxxxxx.xxx>
To: "amsat-bb" <amsat-bb@xxxxx.xxx>
Sent: Sunday, October 11, 2009 6:19 PM
Subject: [amsat-bb] Road Trip finally comes to an end
> Have arrived at home base now, so can get back to somewhat normal
> operations. I would like to thank all the ops who I worked while on this
> 16 day cross country adventure while operating in the following grids:
> DM26, DM65, EM25, EM45, EM63, EM73, EM70, EL79, EM40, EM00 and last but
> not least DM91. I have a stack of envelopes on my desk now to answer with
> return cards for your efforts, and also I think I have the ones that came
> via eQSL.cc all confirmed as of yesterday. I think the 2 prized Grids were
> EL79 and EM00. So, please bear with me and I will get the cards out ASAP.
> Again, thanks to all for giving me some challenges using the Yaesu FT60 HT
> and the ELK L.P. yagi, handheld. Funny though.... in all the RV parks I
> was in and operating, not one person came up to me and asked me what I was
> doing !! They all looked at me funny though. Oh, acouple of highlights of
> the trip was first the visual observation of the ISS on a pass over the
> Mississippi River which was something, as !
> alot of the RV'ers were wondering what we were looking at, until I
> explained it, and then they all got a gander of it. Secondly, was finally
> meeing Glenn AA5PK eyeball to eyeball. Thanks for being a host and for
> letting me give a demo at the San Angelo Radio Club meeting of satellite
> ops. Was nice of AO-51 to be overhead at that time.
>
> See everyone back on normal shift now at home..
>
> 73 de John W6ZKH
> DM06
>
>
> _______________________________________________
> 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: Mon, 12 Oct 2009 00:09:35 -0700
From: "Greg D." <ko6th_greg@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?
To: <n1miw@xxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <BLU133-W105A90CD11AA74F7C4ABA1A9C80@xxx.xxx>
Content-Type: text/plain; charset="Windows-1252"
The thing is, running the spacecraft with the panels open only works if the
satellite is fully stabilized so that the panels continually point towards
the sun. Stabilization only works if lots of things, pretty much everything
in fact, is working on the spacecraft. I'd say that we've pretty much
determined that is not the case.
Let's follow the first rule of medicine (and spacecraft management), and "do
no harm", until something changes and we know more about what's going on up
there. I, too, am anxiously awaiting that magic day when AO-07 gets a
sibling.
Greg KO6TH
> From: n1miw@xxx.xxx
> To: amsat-bb@xxxxx.xxx
> Date: Mon, 12 Oct 2009 02:26:36 -0400
> Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?
>
> I would want to take the "chance" of trying to open those 4 solar panels,
> even if it was to "see what happens". I don't know the exact layout of the
> equipment on board, but opening those panels just might trigger something
> good to happen. At this point, there really isn't anything to lose. Who
> knows? Opening the panels might expose the batteries to more heat from the
> sun, which could possibly cause them to "open" quicker, or if the
> orientation of AO-40 is off, the extra panels might receive enough light to
> get that IHU working again. Or if there's a short due to the "event", moving
> the panels may remove the short (or fix an open). Do any of the command
> stations want to elaborate on why the panels have remained retracted? Has
> this been discussed? Of course, this is all depending on if the receiver
> will accept the command in the first place...
>
> I would wonder about the sensors picking up light inside the spacecraft
> too. Doesn't sound possible that telemetry would still be able to report
> this if there's holes in the craft.
>
> I'm only questioning opening the panels because it seems like it's the
> only possible thing left to try to resurrect the bird, but nobody wants to
> make the decision - "just in case", which is understandable too. But I'd say
> go for it since there's nothing else to try & she's been silent for a while
> now.
>
> Just my 2 cents worth. Keeping my fingers crossed that AO-40 comes back!...
> Larry
>
>
>
>
>
>
>
>
>
> >Four of the solar panels are retractable but not released. Please see some
> >old pictures.
> >As the orientation of AO-40 is not known it is better that the panels are
> >kept around the satellite. If they still exists...
> >There is enough power from a single panel to run IHU and some beacon if
> >the bus wires and electronics are not damaged. Some sensors indicated that
> >sun is shining into the satellite so there may be big hole(s) in it.
> >Not sure about that raport though. Have to check out that.
> >The beacons were loud with the omnis and data was easily received with
> >rubber duck and hand held radio. Miss that fine telemetry sound.
> >
> >I have allways said that the world would be different if AO-40 were alive.
> >
> >Jari, OH3UW
>
> _______________________________________________
> 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
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------------------------------
Message: 4
Date: Mon, 12 Oct 2009 05:54:37 -0500
From: "Nick Pugh K5QXJ" <quadpugh@xxxxxxxxx.xxx>
Subject: [amsat-bb] thanks
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000001ca4b2a$64bba850$2e32f8f0$@xxx>
Content-Type: text/plain; charset="us-ascii"
A big thanks to Frank and his team for a fantastic conference
Nick k5qxj
------------------------------
Message: 5
Date: Mon, 12 Oct 2009 09:24:11 -0400 (EDT)
From: "Bob Bruninga " <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: PCSAT still kicking
To: "Gordon JC Pearce" <gordonjcp@xxxx.xxx>, amsat-bb@xxxxx.xxx
Message-ID: <20091012092411.ABW64262@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
>> I saw a CQ packet from PCSAT show
>> up on my Mobile on 144.39 yesterday!
>
> Does PCSAT switch between 144.39 and
> 145.825? I'm reasonably certain I
> received a packet with W3ADO-1 a few
> days ago...
Yes, in the default mode, PCSAT has the transmitters cross-connected to both
TNC's. SO if either TNC keys up, it keys up both transmitters. The idea
was that this was a failure recovery mode so that we could get a command
link to either TNC in case either transmitter failed. Once we had command,
then we could disable tthe crossconnect.
Duh... but not if the reason you got there was due to low power. We can
command the isolation relay, but then we loose it 45 minutes later when we
go into eclipse and we are back to crossconnected.
Bob, Wb4APR
------------------------------
Message: 6
Date: Mon, 12 Oct 2009 09:38:53 -0400
From: "Bob Martinson" <REMartinson@xxx.xxx>
Subject: [amsat-bb] Re: thanks
To: "Nick Pugh K5QXJ" <quadpugh@xxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <CKEPIJLEFJLCJMEKKCNEGEBHDIAA.REMartinson@xxx.xxx>
Content-Type: text/plain; charset="us-ascii"
I second the motion!!! Fantasticis an understatement.
Bob, K1REM
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxxxx
Behalf Of Nick Pugh K5QXJ
Sent: Monday, October 12, 2009 6:55 AM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] thanks
A big thanks to Frank and his team for a fantastic conference
Nick k5qxj
_______________________________________________
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
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------------------------------
Message: 7
Date: Mon, 12 Oct 2009 09:52:41 -0400
From: "Alex, N3SQ" <amsat@xxxxxx.xxx>
Subject: [amsat-bb] Re: Not everyone is working on ARISSat-1 . . . .
The AMSAT NextGen Spacecraft Bus
To: amsat-bb@xxxxx.xxx
Message-ID: <4AD334A9.90407@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
As I mentioned a few weeks ago . . . Not all of us are focused on ARISSat-1.
I left everyone with two thoughts:
* Look to the Empire State near the Harvest Moon
* A gift may arrive near the ides of May
At the AMSAT Symposium (which happens to be occurring near the Harvest
Moon) a paper was presented on behalf of a team of students from the
State University of New York at Binghamton (Binghamton University),
Thomas J Watson School of Engineering and Applied Sciences. The students
form, as part of their Senior Design Projects, the core of an AMSAT
volunteer team to modify the ARISSat-1 design into the Next Generation
of OSCARs using the CubeSat specification, i.e. the NextGen Project. It
will be an OPEN, modular design in furtherance of the decision at last
year's symposium to create a building block architecture for future
satellites.
The core student team consists of 27 Systems Engineering students who
are focusing on requirements analysis of ARISSat-1, documenting the
ARISSat-1 systems, and analyzing the lessons learned from ARISSat-1 /
other prior spacecraft. The goal is to have a modular, evolutionary
design ready for NextGen's presentation at the 2010 Dayton Hamvention.
(which happens to be occurring near the ides of May . . . ). There are
also 7 Mechanical, Electrical and Computer Engineers working together
with the Systems Engineers on the Power and Structure Systems of
NextGen. The EEs will be focusing on redesigning the ARISSat-1 Power
Systems to use Supercapacitors instead of batteries and reducing the
footprint of some of the boards (ICB especially). The MEs will be
focused on modifying the structure to incorporate deployable solar
panels with a scalable design that will work for 1U, 2U and 3U sizes.
So that's a total core team of 34 Students . . . plus advisers, mentors
and volunteers
The goal is for NextGen to be a Picosat-class bus structure that AMSAT,
or any other University, can use for 1U, 2U, or 3U CubeSat spacecraft.
We will be using good Industrial Engineering concepts to drive the unit
cost down while maintaining reliability. If we can get the cost low
enough to mass produce the NextGen bus, AMSAT could make the bus
available at low-to-no-cost to qualified University groups - AMSAT would
handle spacecraft operations during the primary mission, but when the
primary mission is complete, the satellite is turned over to AMSAT for
it's secondary mission as a new Amateur Radio Satelite - an OSCAR in
every CubeSat.
Now the satellite, given the right conditions, could have a lifetime
equivalent to AO-7. This will allow Universities and Schools to focus on
developing the payload and experiments to fit within the integrated and
proven spacecraft bus.
An Engineering Model of the NextGen CubeSat spacecraft bus will be on
display at the Dayton Hamvention AMSAT Booth for everyone to study.
The BU team is the core of the AMSAT team, but we are looking for other
individuals and University/School teams to participate in all aspects of
the spacecraft design - RF Systems - Guidance, Navigation, Control &
Experiment Systems - Power & Structure Systems. This is an ongoing
effort, it is not a one time event, but the start of a stable,
evolutionary design process that will further STEM (Science, Technology,
Engineering & Mathmatics) with the Next Generation of engineers and
amateur radio operators.
We're going to do Evolutionary Change, not Revolutionary Change.
We're going to utilize, modify and develop Reusable Modules
We're going to start with Picosat-class and work our way up
We're going to use good Systems Engineering standards and practices
WITHOUT stifling creativity and the need to have FUN
We're going to all LEARN something from each other
Volunteers are needed, the adventure awaits! Time to stop talking and
time to get working.
There have been lots of posts on this list (AMSAT-BB) about not having
enough of in-orbit spacecraft, - well now is your chance to make a
difference.
V O L U N T E E R !
Even if you only have an hour a week, you can mentor a student over the
phone or you can peer review a document that the students(or someone
else) are working on.
If you have more than an hour a week, you can implement a small design
change to an existing subsystem; you could respin the board layout to
meet a reduced form factor; you could redesign a module to use different
technology (there are lots of ways to do an SDX and lots of ways to do
an IHU).
If you are working with a University/School who is working on a CubeSat
or thinking about it, talk to me, we're looking for other teams to
contribute. Your students will get experience dealing with
geographically-distributed virtual teams.
Please feel free to contact me with any questions, comments or offers to
volunteer.
Alex Harvilchuck, N3NP
NextGen Program Manager
Alex, N3SQ wrote:
> There are some of us out here who are trying to bring a little order
> to the chaos and help AMSAT, but we are all not working on ARISSat-1.
>
> Our effort lies in the following vectors and scalars:
> - Change needs to be EVOLUTIONARY not REVOLUTIONARY.
> - Chaos can be harnessed with the correct application of traceability.
> - The future leads through the correct application of effort
>
> There are clouds of dust on the horizon . . . . . with the sound of
> many hoof-beats in the distance . . . . . is that a bugle call-to-arms
> I hear on the wind?
> Those who know, understand. Those who need to know will find out soon
> enough.
>
> I will leave you with these two thoughts until next time . . .
> * Look to the Empire State near the Harvest Moon.
> * A gift may arrive near the ides of May.
>
>
------------------------------
Message: 8
Date: Mon, 12 Oct 2009 10:52:11 -0500
From: "John P. Toscano" <tosca005@xx.xxx.xxx>
Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?
To: amsat-bb@xxxxx.xxx
Message-ID: <4AD350AB.5070102@xx.xxx.xxx>
Content-Type: text/plain; charset=windows-1252; format=flowed
Greg D. wrote:
> The thing is, running the spacecraft with the panels open only works if
the satellite is fully stabilized so that the panels continually point
towards the sun. Stabilization only works if lots of things, pretty much
everything in fact, is working on the spacecraft. I'd say that we've pretty
much determined that is not the case.
>
> Let's follow the first rule of medicine (and spacecraft management), and
"do no harm", until something changes and we know more about what's going on
up there. I, too, am anxiously awaiting that magic day when AO-07 gets a
sibling.
>
> Greg KO6TH
And taking Greg's analogy a bit further, imagine a comatose patient
lying in his bed. Does the doctor stand at the bedside and scream at the
patient, "Tell me what's wrong with you so I can treat you!!!" -- I
don't think so. If that analogy seems too gruesome to you, then perhaps
another one that many parents of small children have experienced
first-hand will work. Your 3-year-old child wanders into the bathroom to
investigate all the pretty things inside, and she pushes the door closed
behind her. Then she plays with the doorknob and accidentally pushes the
lock button. Parents frantically stand outside the locked bathroom door
and plead with the child to please open the door, while imagining all
the dangerous objects on the other side of the barrier, such as sharp
scissors, scalding hair rollers, a large porcelain fixture full of water
to drown in, etc. "Please open the door! Mommy and Daddy aren't mad!
Please just open the door!" while the child on the other side has no
idea what mommy and daddy are babbling about...
In case you miss my point, with essentially no power making it to the
IHU or the receivers, how is the spacecraft supposed to "hear" a command
to open the panels, or even if it heard the command, execute it with no
electrical power?
Long before AO-40 went comatose (silent) for the last time, it had
already been determined after long and careful deliberation that without
the ability to properly steer the spacecraft attitude to keep the panels
in the sun, they would do more good in the folded configuration, and so
it was decided to NOT deploy them. There was some discussion on this
point on the mail list. You could dig back through the archives to find
that discussion if you were so inclined.
Indeed, it would be wonderful if the patient "woke up" from her long
sleep like AO-7 did. There's no harm in wishing, even when the odds of
success are so slim...
73 de W?JT
------------------------------
Message: 9
Date: Mon, 12 Oct 2009 11:57:25 -0400
From: "Randy" <RSwart1@xxxxx.xx.xxx>
Subject: [amsat-bb] Re: Last Ditch Effort
To: <amsat-bb@xxxxx.xxx>
Message-ID: <024801ca4b54$b19330b0$0301a8c0@xxxx>
Content-Type: text/plain; charset="us-ascii"
How do I configure this in MIXW2?
Don't see "via" in there?
Randy - N2CUA
>Hello all,
>The ISS is being overtaken by Castor. October 13 at 06:30 UTC, both will be
about 19km from each other. I did a little experiment >a week ago and found
that sending commands through the ISS is possible.
>Then TNC should be configured as follows:
>unproto KD4HBO-1 via RS0ISS-3
>Then send the command
>BE40R
------------------------------
Message: 10
Date: Mon, 12 Oct 2009 17:58:33 +0200
From: "OZ1MY" <oz1my@xxxxxx.xx>
Subject: [amsat-bb] FM satellite operations again again over Europe
To: "AMSAT-BB" <amsat-bb@xxxxx.xxx>
Message-ID: <000701ca4b54$da2b7e60$6401a8c0@xxxxxx.xx>
Content-Type: text/plain; charset="iso-8859-1"
Hi all in Europe,
It is obviously about time to repeate a few
good points about operating via the FM repeater
satellites.
1. Do not transmit if you can not hear it
2. When the satellite is busy - limit the number of QSO's to ONE
3. Do not call over an ongoing QSO
4. A valid QSO just needs the call and the report
5. Give way to weak stations like /p and /m
6. Allow DX-peditions to make as many QSO's as there are callers
That was the short version :-)
I have a long version in English, Italian, Russian, Spanish and French.
I can send it to you if you want it. Could use a few other languages
like Greek, Polish and others.
It would be nice if you can get it in your national journals.
And please no flames !
73 OZ1MY
Ib
------------------------------
Message: 11
Date: Sun, 11 Oct 2009 14:28:43 -0700 (PDT)
From: Elan Portnoy <elanportnoy@xxxxx.xxx>
Subject: [amsat-bb] Re: accidental RF into wrong cable of Arrow=bad
duplexer?
To: amsat-bb@xxxxx.xxx
Message-ID: <146469.95668.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Duplexer are bi-directional. Essentially passive bandpass filters--don't
care which way he RF flows.
--- On Sun, 10/11/09, Tim Goodrich <tim@xxxxxxxxxxx.xxx> wrote:
> From: Tim Goodrich <tim@xxxxxxxxxxx.xxx>
> Subject: [amsat-bb] accidental RF into wrong cable of Arrow=bad duplexer?
> To: amsat-bb@xxxxx.xxx
> Date: Sunday, October 11, 2009, 3:51 PM
> I am an owner of a 2m/70cm LEO
> satellite antenna with duplexer in the
> handle. Sometimes, I operate full duplex (two radios) and
> bypass the
> duplexer by attaching my own cables to the separate parts
> of the antenna (1
> radio for 2m, 1 radio for 70cm). In the course of rushing
> to catch a
> satellite pass, I mixed up my connections and accidentally
> transmitted (5
> watts) into one of the arrow antenna cables, causing RF to
> feed backwards
> into the duplexer.
>
>
>
> Recently, I have noticed decreased performance (poor
> reception, lower S/N,
> even on AO-51 when in the past it was full quieting) and am
> trying to
> ascertain if it could have anything to do with my mistake
> of feeding RF in
> the wrong direction into the duplexer. Could my mistake
> cause this problem?
>
>
>
> Thanks,
>
> Tim
>
> KI6VBY
>
>
>
>
>
> _______________________________________________
> 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: Mon, 12 Oct 2009 03:24:06 -0400
From: Luc Leblanc <lucleblanc6@xxxxxxxxx.xx>
Subject: [amsat-bb] Re: Can we get them to fix AO-40 first then?
To: amsat-bb@xxxxx.xxx
Cc: eu-amsat@xxxxxxxxxxx.xxx
Message-ID: <4AD2A156.9453.3604089@xxxxxxxxxxx.xxxxxxxxx.xx>
Content-Type: text/plain; charset=US-ASCII
On 12 Oct 2009 at 8:50, jari.koivurinne@xxxx.xxx wrote:
> > I'm no expert on AO-40, but to the best of my knowledge, the solar panels
> > are not retractable - they are fixed in place. The satellite cannot be
> > commanded "on", as the shorted batteries shunt virtually all of the solar
> > panel output, such that either the command receiver is not operating at
> > all,
> > or there is simply not enough juice to switch anything. Our best hope is
> > that someday, the batteries will fail open, just as AO-7's batteries did,
> > and AO-40 comes back to life when adequately illuminated.
> >
> > George, KA3HSW
> >
>
> Four of the solar panels are retractable but not released. Please see some
> old pictures.
> As the orientation of AO-40 is not known it is better that the panels are
> kept around the satellite. If they still exists...
> There is enough power from a single panel to run IHU and some beacon if
> the bus wires and electronics are not damaged. Some sensors indicated that
> sun is shining into the satellite so there may be big hole(s) in it.
> Not sure about that raport though. Have to check out that.
> The beacons were loud with the omnis and data was easily received with
> rubber duck and hand held radio. Miss that fine telemetry sound.
>
> I have allways said that the world would be different if AO-40 were alive.
>
> Jari, OH3UW
>
>
Just an excerpt from the amsat-dl AO-40 status page
http://www.amsat-dl.org/journal/adlj-p3d.htm
"The BCR's are designed to function with the solar panels extended, when
they have to handle over 3 times the power available in spin
mode."
You can also have a pretty good idea of AO-40 life at
http://en.wikipedia.org/wiki/AO-40.
Is AO-40 will be a next AO-07 in 30 years from 2004 lets say in 2034? just
reading back this catastrophic event period i note this.
" --W4SM for the AO-40 Command Team
PERSONAL NOTE : Like my colleagues on the command team, I have lived and
breathed AO-40 for over four years. All of us can almost mentally
decode 400 bps PSK. We hear it in our sleep. I was watching the battery
voltage telemetry at the exact moment that the voltage dropped
precipitously. In my "day job" I have frequently watched catastrophic events
unfold in human beings, and the feeling was EXACTLY the same.
Part of my day job is to have to make quick decisions during times such
times, decisions that can have serious consequences. I was
instantly aware that we had a serious power event, and I considered cutting
the main battery loose and trying to run on the nearly
completely discharged and untested under load aux. battery. However, because
I did not have a clear understanding of where the primary
fault was, I elected to watch things and try to figure out what was
happening. The general rule of, "when in doubt wait to understand"
works most of the time... In this case it didn't, and I'd sure like to live
those minutes over again and cut the main battery loose.
Hindsight is always 20-20. Of course, if it had crashed anyway, then I'd
really be beating myself up. If it's at all possible to bring AO-
40 back, we will. If the voltage is clamped low and there is no other
damage, we may end up waiting a long time for a cell to "open",
hopefully not as long as for AO-07. ..or it may happen today. No success for
even weeks or months does not mean that we won't eventually be
successful. We will sure keep trying. Several of you have written very nice
notes of support. Thank you."
I have a question in mind since that time. Is an open cell event as the one
happens in AO-07 can in the last AO-40 batteries context and
condition enable enough power/voltage-current to bring the satellite to some
sort of life?
"-"
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE
------------------------------
Message: 13
Date: Mon, 12 Oct 2009 17:43:57 +0100
From: "P.H." <bbjunkie@xxx.xxx>
Subject: [amsat-bb] Re: accidental RF into wrong cable of Arrow=bad
duplexer?
To: amsat-bb@xxxxx.xxx
Message-ID:
<a0b58e560910120943s5b341b2etab765ba8403c4b4c@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi Tim,
Just my $0.02 worth..
I read on the Kenwood TH-F7e reflector that a very high VSWR can fry
preamp components in that particular model, perhaps the same has
happened in yours?
Good luck finding the cause!
Pete
> If you reverse the antennas at the output of the above duplexer the only
> effect will be a very high VSWR in both bands VHF and UHF but no
> damage will involve the receivers.
>
> Best 73" de
>
> i8CVS Domenico
>
>
>
>
>
> _______________________________________________
> 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: 14
Date: Mon, 12 Oct 2009 12:01:07 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] an interesting article on "bleep sats"
To: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W62395723D6AD6861E63C35D6C80@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
http://thespacereview.com/article/1490/1
Robert WB5MZO
_________________________________________________________________
Your E-mail and More On-the-Go. Get Windows Live Hotmail Free.
http://clk.atdmt.com/GBL/go/171222985/direct/01/
------------------------------
Message: 15
Date: Mon, 12 Oct 2009 14:17:53 -0400
From: "Nathaniel S. Parsons" <nsp25@xxxxxxx.xxx>
Subject: [amsat-bb] Yaesu GS-232B Problems Connecting
To: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID:
<e9267a810910121117k18785bbbjb29e2aaabdffbad5@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi,
My 232B has worked fine in the past, but just today is acting up (last time
I used it was a few months ago). I can't connect to it with hyperterminal or
HRD.
Following the directions of the manual, I have connected on various bit
rates (1200, 9600), switched the device on, and hit enter a few times, but I
never get a successful connection message.
Could it be that the device stops working if it ever goes below a certain
temperature? It's gotten cold recently, so that's the only thing I can think
of.
Thanks
-Nate
KC2SVI
------------------------------
Message: 16
Date: Mon, 12 Oct 2009 20:26:21 +0200
From: "Eric Knaps, ON4HF" <eric.knaps@xxxxxxx.xx>
Subject: [amsat-bb] Re: FM satellite operations again again over
Europe
Cc: AMSAT-BB <amsat-bb@xxxxx.xxx>
Message-ID: <4AD374CD.8060600@xxxxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
I like rule number 3. I hate it when somebody calls cq while you are in
the middle of a qso.
73,
Eric.
Eric Knaps
Waterstraat 30
B-3980 Tessenderlo
Belgium
Tel. +32472985876 (mobile)
http://www.on4hf.be
OZ1MY schreef:
> Hi all in Europe,
> It is obviously about time to repeate a few
> good points about operating via the FM repeater
> satellites.
>
> 1. Do not transmit if you can not hear it
>
> 2. When the satellite is busy - limit the number of QSO's to ONE
>
> 3. Do not call over an ongoing QSO
>
> 4. A valid QSO just needs the call and the report
>
> 5. Give way to weak stations like /p and /m
>
> 6. Allow DX-peditions to make as many QSO's as there are callers
>
> That was the short version :-)
>
> I have a long version in English, Italian, Russian, Spanish and French.
> I can send it to you if you want it. Could use a few other languages
> like Greek, Polish and others.
> It would be nice if you can get it in your national journals.
>
> And please no flames !
>
> 73 OZ1MY
> Ib
>
> _______________________________________________
> 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 member? Join now to support the amateur satellite program!
http://amsat.org/mailman/listinfo/amsat-bb
End of AMSAT-BB Digest, Vol 4, Issue 528
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