| |
CX2SA > SATDIG 20.10.09 20:58l 244 Lines 8175 Bytes #999 (0) @ WW
BID : AMSATBB4551
Read: GUEST
Subj: AMSAT-BB-digest V4 551
Path: IZ3LSV<IK3GET<I3LUG<I3XTY<I4UKI<IK6ZDE<IK2XDE<DB0RES<DK0WUE<SP7MGD<
VE2PKT<F1BBI<CX2SA
Sent: 091018/1903Z @:CX2SA.LAV.URY.SA #:10461 [Minas] FBB7.00e $:AMSATBB4551
From: CX2SA@CX2SA.LAV.URY.SA
To : SATDIG@WW
Today's Topics:
1. Re: Why do hamsats? (Or anything else...) (Ben Jackson)
2. Re: Why do hamsats? (Or anything else...) (Bruce Robertson)
3. THE DMSP launch (Rocky Jones)
4. Re: Why do hamsats? (Or anything else...) (Rocky Jones)
5. FN65 on AO-27 18Oct 1845z (John Papay)
6. Alaska Special Event Station (Dale Hershberger)
----------------------------------------------------------------------
Message: 1
Date: Sun, 18 Oct 2009 12:57:34 -0400
From: Ben Jackson <bbj@xxxxxxxx.xxx>
Subject: [amsat-bb] Re: Why do hamsats? (Or anything else...)
To: Rocky Jones <orbitjet@xxxxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>, k6hx@xxxx.xxx
Message-ID: <4ADB48FE.8000504@xxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Rocky Jones wrote:
>
> That still doesnt answer the question of why on Suitsat 2 they should
> fly a digital transponder.
Actually, it does, you said the reasons yourself.
> In my view better engineering doctrine would imply that we try and
> put the digital transponder ON ISS and let it "cook" there for a bit.
Yup, that would be ideal, I'm nominating you to head that project. This
is right up your alley, as since you and your friends within the JSC
can navigate the political process easily. Lets run this in tandem with
the ARISSSat project.
Thanks for volunteering!
--
Ben Jackson - N1WBV - New Bedford, MA
bbj <at> innismir.net - http://www.innismir.net/
------------------------------
Message: 2
Date: Sun, 18 Oct 2009 14:08:45 -0300
From: Bruce Robertson <ve9qrp@xxxxx.xxx>
Subject: [amsat-bb] Re: Why do hamsats? (Or anything else...)
To: Rocky Jones <orbitjet@xxxxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>, k6hx@xxxx.xxx
Message-ID:
<49657a760910181008o4214cc68q3ff9ac0647886b6@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
On Sun, Oct 18, 2009 at 12:32 PM, Rocky Jones <orbitjet@xxxxxxx.xxx> wrote:
> As it is, with the knowledge that suitsat 1 died on deployment...we would
never know if the transponder was just not working or wasnt put together well.
I wonder if the misunderstandings I infer in the above sentence might
be part of the basis of the disagreement on this list. It was my
understanding that no transponder flew on SS1: rather the plan was to
transmit SSTV and messages from kids, as well as some telemetry.
Here is a typical document outlining the plan for the project:
http://science.nasa.gov/headlines/y2006/26jan_suitsat.htm
Second, the word 'died' suggests that ground stations never received
the signals from SS1. They did: even with my modest equipment I was
able to reach this challenge. However, the signals were highly
attenuated, and after two weeks they stopped altogether. Some of the
fun that hams and educators had during this time is documented at:
http://www.aj3u.com/blog/
A further point of fact that might inform this discussion: amateur
software defined transponders have been under design by Bob and others
for years. Granted, they were originally planned for P3-E and Eagle,
but it is an exaggeration to suggest that something that has Howard
Long first had working in 2005, and that Tom Clark W3IWI, Rick Hambly
W2GPS, and Bob McGwier N4HY ran a QSO through in August, 2005 is not
ready for prime-time. Hear that QSO at
http://www.gpstime.com/files/amsat/Eagle_SDT_1st_Contact.mp3
73, Bruce
VE9QRP
------------------------------
Message: 3
Date: Sun, 18 Oct 2009 12:12:16 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] THE DMSP launch
To: Rocky Jones <orbitjet@xxxxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <COL106-W2467CD2E79DD57EB29E285D6C20@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
"We have a unique opportunity with the Atlas 5/DMSP launch, as DMSP is
a relatively lighter spacecraft than many of those that fly on Atlas.
For that reason, we have a tremendous amount of performance margin.
That's certainly not the case for some future missions that Atlas will
be flying. So we're taking advantage of the opportunity before us to
use some of that excess performance margin on the Atlas 5," said Col.
Michael Moran, the Atlas Group commander.
to bad we didnt have something to use that excess performance...they flew
ballast on the flight
Robert WB5MZO
_________________________________________________________________
Hotmail: Free, trusted and rich email service.
http://clk.atdmt.com/GBL/go/171222984/direct/01/
------------------------------
Message: 4
Date: Sun, 18 Oct 2009 12:37:44 -0500
From: Rocky Jones <orbitjet@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Why do hamsats? (Or anything else...)
To: <bbj@xxxxxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>, k6hx@xxxx.xxx
Message-ID: <COL106-W45FA0985C6EE33197B1B54D6C20@xxx.xxx>
Content-Type: text/plain; charset="iso-8859-1"
> Date: Sun, 18 Oct 2009 12:57:34 -0400
> From: bbj@xxxxxxxx.xxx
> To: orbitjet@xxxxxxx.xxx
I wrote:
>
> > In my view better engineering doctrine would imply that we try and
> > put the digital transponder ON ISS and let it "cook" there for a bit.
>
you replied
> Yup, that would be ideal, I'm nominating you to head that project. This
> is right up your alley, as since you and your friends within the JSC
> can navigate the political process easily. Lets run this in tandem with
> the ARISSSat project.
>
> Thanks for volunteering!
>
> --
> Ben Jackson - N1WBV - New Bedford, MA
> bbj <at> innismir.net - http://www.innismir.net/
one has to wonder Ben why didnt they try it? There would have been a few
more issues involved in terms of operating the thing on ISS other then just
deploying it (mostly RF work)...
but...
as for me heading the project. I'd deep six the entire software defined
transponder, put it on a development effort with some heavy program
guidance...find some people who wanted to build linear transponders even if
they were overseas (such people exist already) and start flying as many of
those as possible.
Right now what in my view the satellite community needs is a 100 percent
Oscar 7 or 10...not some technological development issues.
If I were king we would have something to offer the USAF if they had spare
lift on a Centaur as they just had...remember the original Oscar's flew on
USAF vehicles.
in the meantime I will continue to keep my technical skills sharp (grin) by
helping the 10 year olds put together a buoy that is going to float in Clear
Lake...
Robert WB5MZO
_________________________________________________________________
Hotmail: Powerful Free email with security by Microsoft.
http://clk.atdmt.com/GBL/go/171222986/direct/01/
------------------------------
Message: 5
Date: Sun, 18 Oct 2009 13:47:59 -0400
From: John Papay <john@xxxxxx.xxx>
Subject: [amsat-bb] FN65 on AO-27 18Oct 1845z
To: amsat-bb@xxxxx.xxx
Message-ID: <86494.75959.qm@xxxxxxx.xxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
Richard, N2SPI, is in FN65 and will operate on
the next AO-27 pass at 1845z, 18 Oct. This was
unplanned, hence the short notice. Good luck!
73,
John K8YSE
John Papay
john@xxxxxx.xxx
------------------------------
Message: 6
Date: Sun, 18 Oct 2009 10:21:07 -0800
From: Dale Hershberger <daleh@xxxxxx.xxx>
Subject: [amsat-bb] Alaska Special Event Station
To: amsat bbs <amsat-bb@xxxxx.xxx>
Message-ID: <4ADB5C93.9040001@xxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
To all out there. I will be QRV on Satellites as KL5O, a special event
station in
celebration of Alaska's 50yrs of statehood. I was notified to
participate just a short while
ago. I was on some of the earlier passes. This event will go on until
10pm local time.
QSL info is on the www.KL5O.com website. Special cards will be available.
Hope to make contact with you.
Dale-kl7xj
------------------------------
_______________________________________________
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 551
****************************************
Read previous mail | Read next mail
| |
