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CX2SA > SATDIG 07.05.09 00:43l 609 Lines 18661 Bytes #999 (0) @ WW
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To : SATDIG@WW
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When replying, please edit your Subject line so it is more specific
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Today's Topics:
1. Dayton Room (Martha)
2. Happy Birthday HAMSAT (Bat? Andr?s)
3. Question (Dave)
4. Re: Question (Nigel Gunn G8IFF/W8IFF)
5. Re: Question (James Duffey)
6. Re: Happy Birthday HAMSAT (Prathap Kumar)
7. Re: Question (Jim Heck)
8. Re: Cal Poly's CP6 Satellite Launching May 5th (Wouter Weggelaar)
9. AMSAT Journal -Vol 32 - No3 (GW1FKY@xxx.xxxx
10. Call for Papers--2009 ARRL/TAPR Digital Communications
Conference (Ford, Steve, WB8IMY)
11. Re: Satellite funding sources! (John B. Stephensen)
12. Re: Question (Gordon JC Pearce)
----------------------------------------------------------------------
Message: 1
Date: Tue, 5 May 2009 15:57:08 -0400
From: Martha <martha@xxxxx.xxx>
Subject: [amsat-bb] Dayton Room
To: amsat-bb@xxxxx.xxx
Message-ID:
<956751cf0905051257t76e740b2m7ac2f67945b3b1c4@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
If I don't have a taker for the "AMSAT" room at Dayton by close of business
tomorrow, I will cancel it.
--
73- Martha
------------------------------
Message: 2
Date: Tue, 05 May 2009 20:16:19 +0000
From: Bat? Andr?s <bato@xxxxxxx.xx>
Subject: [amsat-bb] Happy Birthday HAMSAT
To: amsat-bb@xxxxx.xxxx amsatindia@xxxxxxxxxxx.xxxx
vuhams@xxxxxxxxxxx.xxxxxxxxxx@xxxxxxxxxxx.xxxx ARSICOM@xxxxxxxxxxx.xxx
Message-ID: <4A009E93.2050804@xxxxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-2; format=flowed
Gentlemen,
A group of Hungarian satellite enthusiasts are celebrating the fourth
birthdy of HAMSAT by tracking it on all orbits today and makingas many
Qs as pssible.
Let us say thank you for all your endeavours in giving birth to this
succesful bird.
Best regards from
HA2RD, HA5WH, HA5CH and HA6NN
------------------------------
Message: 3
Date: Tue, 5 May 2009 19:38:44 -0600
From: "Dave" <dave@xxxxxx.xxx>
Subject: [amsat-bb] Question
To: <amsat-bb@xxxxx.xxx>
Message-ID: <AFDC5B09DB9D432CB0A7286DDBD2853E@xxxxxxxxxxx>
Content-Type: text/plain; charset="us-ascii"
Okay, time for my stupid question of the week.
Why are our sats so low powered? Why don't we have better batteries, solar
power systems, or generators?
Seems our sats are so low powered they require extraordinary measures to
receive.
Is this an accurate perception?
Dave
------------------------------
Message: 4
Date: Wed, 06 May 2009 01:58:03 +0000
From: Nigel Gunn G8IFF/W8IFF <nigel@xxxxx.xxx>
Subject: [amsat-bb] Re: Question
To: dave@xxxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4A00EEAB.6080802@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Basically.... Money.
Dave wrote:
> Okay, time for my stupid question of the week.
>
>
> Why are our sats so low powered? Why don't we have better batteries, solar
> power systems, or generators?
>
> Seems our sats are so low powered they require extraordinary measures to
> receive.
>
> Is this an accurate perception?
>
> Dave
------------------------------
Message: 5
Date: Tue, 5 May 2009 20:17:19 -0600
From: James Duffey <JamesDuffey@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Question
To: dave@xxxxxx.xxx
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <2EB911DA-443D-4459-B94F-4093D558FA34@xxxxxxx.xxx>
Content-Type: text/plain; charset=US-ASCII; format=flowed; delsp=yes
Well more power means more solar cells and bigger batteries.
The number of solar cells that one can fit on the outside of a
satellite depends on the size of the satellite. More solar cells means
a bigger spacecraft or deployable cells. There is a limit to the size
of deployable panels and added complexity risks the mission if they
should fail. Bigger spacecraft cost more to build and launch.
The size of the solar panels determines the battery size. Ideally you
want a battery that can be fully charged by the solar cells while in
sunlight and maintain its charge to a useful level in eclipse. Bigger
batteries weigh more and weight pretty much determines how much a
satellite costs, particularly the launch costs.
So it pretty much boils down to optimizing the solar panel/battery
combination with the size of the spacecraft and the mass lift
capability available to us on a launcher.
I am not sure what you mean by extraordinary measures to receive, or
what satellite you are trying to receive, but the requirements to
receive many satellites is modest. Low loss feedline, helps, as do
directional antennas and preamps, but these are all available with
modest effort, either through building them yourself or purchasing
them. - Duffey
>
> Okay, time for my stupid question of the week.
>
>
> Why are our sats so low powered? Why don't we have better batteries,
> solar
> power systems, or generators?
>
> Seems our sats are so low powered they require extraordinary
> measures to
> receive.
>
> Is this an accurate perception?
>
> Dave
>
> _______________________________________________
> 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
--
KK6MC
James Duffey
Cedar Crest NM
------------------------------
Message: 6
Date: Wed, 6 May 2009 09:32:55 +0530
From: "Prathap Kumar" <vu2pop@xxxxx.xxx>
Subject: [amsat-bb] Re: Happy Birthday HAMSAT
To: Bat? Andr?s <bato@xxxxxxx.xx>, <amsat-bb@xxxxx.xxx>,
<amsatindia@xxxxxxxxxxx.xxx>, <vuhams@xxxxxxxxxxx.xxx>,
<CQ_VU@xxxxxxxxxxx.xxx>, <ARSICOM@xxxxxxxxxxx.xxx>
Message-ID: <B0EFC623B13640E49C68434B2A24D8EF@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Thank you all from Hungary
Great to hear about your activities
We from Amsat India and on behalf of ISRO look forward to your USER Reports
and Utilisation of Hamsat over your region.
If you have any sample recordings of QSOs you could send to
info@xxxxxxxxxx.xxx
Best 73
Pop
VU2POP
Secy Amsat India
----- Original Message -----
From: "Bat? Andr?s" <bato@xxxxxxx.xx>
To: <amsat-bb@xxxxx.xxx>; <amsatindia@xxxxxxxxxxx.xxx>;
<vuhams@xxxxxxxxxxx.xxx>; <CQ_VU@xxxxxxxxxxx.xxx>; <ARSICOM@xxxxxxxxxxx.xxx>
Sent: Wednesday, May 06, 2009 1:46 AM
Subject: [amsat-bb] Happy Birthday HAMSAT
> Gentlemen,
>
> A group of Hungarian satellite enthusiasts are celebrating the fourth
> birthdy of HAMSAT by tracking it on all orbits today and makingas many
> Qs as pssible.
>
> Let us say thank you for all your endeavours in giving birth to this
> succesful bird.
>
> Best regards from
>
> HA2RD, HA5WH, HA5CH and HA6NN
>
> _______________________________________________
> 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: 7
Date: Wed, 6 May 2009 07:17:33 +0100
From: "Jim Heck" <jimlist@xxxxxx.xx.xxx>
Subject: [amsat-bb] Re: Question
To: "James Duffey" <JamesDuffey@xxxxxxx.xxx>, <dave@xxxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Message-ID: <OLECJJCJBEHDCCHICKFFEEBBFPAA.jimlist@xxxxxx.xx.xxx>
Content-Type: text/plain; charset="windows-1250"
And dont forget the antennas on the sattelite. They cant necessarily be
optimal. A
directional antenna needs a platform, the orientation of which is known and
controlled. To do this is space is not trivial; vbarious mechanism exist,
gravity
gradient boom, megnetostorquing, spinning wheels. Its also expensive and adds
complication to the satellitte.
Some amateur sats have been stablised, and have used directional antennas
successfully, eg AO-40, AO-13, but not only were these costly to build and
launch,
they also required considerable ground control efforet (globally) to ensure
their
solar cells we never parrallel to the suns rays. (If that happens, no
power=death of
the sat).
73 Jim G3WGM
> -----Original Message-----
> From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxxxx
> Behalf Of James Duffey
> Sent: 06 May 2009 03:17
> To: dave@xxxxxx.xxx
> Cc: Amsat BB
> Subject: [amsat-bb] Re: Question
>
>
> Well more power means more solar cells and bigger batteries.
>
> The number of solar cells that one can fit on the outside of a
> satellite depends on the size of the satellite. More solar cells means
> a bigger spacecraft or deployable cells. There is a limit to the size
> of deployable panels and added complexity risks the mission if they
> should fail. Bigger spacecraft cost more to build and launch.
>
> The size of the solar panels determines the battery size. Ideally you
> want a battery that can be fully charged by the solar cells while in
> sunlight and maintain its charge to a useful level in eclipse. Bigger
> batteries weigh more and weight pretty much determines how much a
> satellite costs, particularly the launch costs.
>
> So it pretty much boils down to optimizing the solar panel/battery
> combination with the size of the spacecraft and the mass lift
> capability available to us on a launcher.
>
> I am not sure what you mean by extraordinary measures to receive, or
> what satellite you are trying to receive, but the requirements to
> receive many satellites is modest. Low loss feedline, helps, as do
> directional antennas and preamps, but these are all available with
> modest effort, either through building them yourself or purchasing
> them. - Duffey
>
> >
> > Okay, time for my stupid question of the week.
> >
> >
> > Why are our sats so low powered? Why don't we have better batteries,
> > solar
> > power systems, or generators?
> >
> > Seems our sats are so low powered they require extraordinary
> > measures to
> > receive.
> >
> > Is this an accurate perception?
> >
> > Dave
> >
> > _______________________________________________
> > 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
>
> --
> KK6MC
> James Duffey
> Cedar Crest NM
>
>
>
>
>
> _______________________________________________
> 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 incoming message.
> Checked by AVG - www.avg.com
> Version: 8.5.325 / Virus Database: 270.12.19/2099 - Release Date:
> 05/05/09 13:07:00
>
------------------------------
Message: 8
Date: Wed, 6 May 2009 10:21:53 +0200
From: Wouter Weggelaar <wouterweg@xxxxx.xxx>
Subject: [amsat-bb] Re: Cal Poly's CP6 Satellite Launching May 5th
To: Mineo Wakita <ei7m-wkt@xxxxxxxxx.xx.xx>
Cc: amsat-bb@xxxxx.xxx
Message-ID:
<7abd0e260905060121j7c375b7cr4a3a4c7c23ec5848@xxxx.xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1
Hi all,
The launch is postponed as can be seen on
http://sites.wff.nasa.gov/webcast/xml/status.html and on
http://twitter.com/NASA_Wallops
Quote
" Posted by RCC on 2009-05-05 at 21:06:18 EDT
We have decided not to try a launch attempt tomorrow, May 6. The next
launch attempt will be Thursday, May 7 with a launch window of 8 to 11
p.m. "
The launch is delayed because of the weather.
So the new window is at may 7 2009 8-11pm EDT which is may 8 00:00 -
02:00 UTC (midnight following on may 7th in europe)
73s
Wouter PA3WEG
On Tue, May 5, 2009 at 4:03 AM, Mineo Wakita <ei7m-wkt@xxxxxxxxx.xx.xx> wrote:
> Launch : 5 May 2009 between 20:00 and 23:00 EDT
> Vehicle: Minotaur-1
> Site ? : WI LA-0B
> Main Payload: TacSat-3, Air Force Research Laboratory
>
> Satellite ? ? USA Operator ? ? ? ? ? ? ? ? ? ? ? Downlink ?Mode
> ----------- ? --------------------------------- ?-------- ?------------
> AeroCube-3 ? ?Aerospace Corporation ? ? ? ? ? ? ?? ? ? ? ? ?
> HawkSat-1 ? ? Hawk Institute for Space Sciences ?437.345 ? ?
> PharmaSat-1 ? NASA, Stanford University ? ? ? ? ?437.465 ? 1200bps AFSK
> CP-6 ? ? ? ? ?CalPoly ? ? ? ? ? ? ? ? ? ? ? ? ? ?437.365 ? 1200bps AFSK
> ----------- ? --------------------------------- ?------- ? ------------
>
> JE9PEL, Mineo Wakita
>
> _______________________________________________
> 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: 9
Date: Wed, 6 May 2009 07:53:23 EDT
From: GW1FKY@xxx.xxx
Subject: [amsat-bb] AMSAT Journal -Vol 32 - No3
To: amsat-bb@xxxxx.xxx
Message-ID: <ce5.4f7fc923.3732d433@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
Hi all,
Received the latest issue of the "AMSAT Journal" in the post today here in
Wales -UK.
Congratulations and many thanks to all for the efforts in producing another
very well documented edition, it is a pleasure to read the contributions
once again..
I enjoyed looking back at "The First Decade". It also brought back many
memories not just on the satellites
but of all of those that played a key role for Amsat in the decade.
As I reached the concluding article on P3E and the - "continued on page
27". I turned back the pages and
had to smile to my self as a thought went through my mind.
The concluding para on page 27 was adjacent the final para on the progress
and process on "ITAR"
The thought that had crossed my mind was - "BACK TO THE FUTURE".
I trust all will be well and wish all Good Luck in this respect.
Ken Eaton
GW1FKY
Amsat - UK
Amsat NA
------------------------------
Message: 10
Date: Wed, 6 May 2009 09:46:43 -0400
From: "Ford, Steve, WB8IMY" <sford@xxxx.xxx>
Subject: [amsat-bb] Call for Papers--2009 ARRL/TAPR Digital
Communications Conference
To: "RTTY Reflector" <rtty@xxxxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>,
<vhf@xxxx.xxxxxxxx.xxx>, <psk31@xxxxxxx.xx.xxx.xx>,
<digitalradio@xxxxxxxxxxx.xxx>
Message-ID:
<AD6F46BB3421B241903D155572BA86FE04EECAD3@xxxxxxxx.xxxxxx.xxx>
Content-Type: text/plain; charset="us-ascii"
Technical papers are solicited for presentation at the 28th Annual ARRL
and TAPR Digital Communications Conference to be held September 25-27,
2009 in Chicago, Illinois. 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, 2009. Please send papers to:
Maty Weinberg
ARRL
225 Main St
Newington, CT 06111
or you can make your submission via e-mail to: maty@xxxx.xxx
Papers will be published exactly as submitted and authors will retain
all rights.
73 . . . Steve, WB8IMY
ARRL
------------------------------
Message: 11
Date: Wed, 6 May 2009 15:18:06 -0000
From: "John B. Stephensen" <kd6ozh@xxxxxxx.xxx>
Subject: [amsat-bb] Re: Satellite funding sources!
To: "Luc Leblanc" <lucleblanc6@xxxxxxxxx.xx>, <amsat-bb@xxxxx.xxx>
Cc: eu-amsat@xxxxxxxxxxx.xxx
Message-ID: <724F2A066DAA48A9821D1BF414730569@xxxxxxxxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Note that these are opportunties are for LEO satellites like AO-51.
73,
John
KD6OZH
----- Original Message -----
From: "Luc Leblanc" <lucleblanc6@xxxxxxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Cc: <eu-amsat@xxxxxxxxxxx.xxx>
Sent: Tuesday, May 05, 2009 13:21 UTC
Subject: [amsat-bb] Satellite funding sources!
>
> It seems that money is available and it is advertised publicly! I don't
> know if AMSAT-NA is aware of it? interested in it? sensible to it?
> able to refocused quickly their goals if any remains? Is a joint support
> offer to some researchers can be something to be explore?
>
> But in the mean time amateur are bystanders spinning their wheels on
> ice...
>
> Here is the text:
>
> Please be advised that the NSF Proposal & Award Policies & Procedures
> Guide (PAPPG) includes revised guidelines to implement the mentoring
> provisions of the America COMPETES Act (ACA) (Pub. L. No. 110-69, Aug. 9,
> 2007.) As specified in the ACA, each proposal that requests
> funding to support postdoctoral researchers must include a description of
> the mentoring activities that will be provided for such
> individuals. Proposals that do not comply with this requirement will be
> returned without review (see the PAPP Guide Part I: Grant Proposal
> Guide Chapter II for further information about the implementation of this
> new requirement).
>
> Beginning in 2009, NSF expects to launch two to three P-PODs every year,
> accommodating at least as many (two to six) individual satellite
> missions. This solicitation covers proposals for science missions to
> include satellite development, construction, testing and operation as
> well as data distribution and scientific analysis.
>
> More details at
> :http://www.nsf.gov/publications/pub_summ.jsp?ods_key=nsf09523
>
>
> "-"
>
>
>
>
> "-"
>
>
> Luc Leblanc VE2DWE
> Skype VE2DWE
> www.qsl.net/ve2dwe
> WAC BASIC CW PHONE SATELLITE
>
>
>
> _______________________________________________
> 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: Wed, 06 May 2009 18:05:52 +0100
From: Gordon JC Pearce <gordonjcp@xxxx.xxx>
Subject: [amsat-bb] Re: Question
To: amsat-bb@xxxxx.xxx
Message-ID: <1241629552.3445.2.camel@xxxxx>
Content-Type: text/plain
On Tue, 2009-05-05 at 19:38 -0600, Dave wrote:
> Seems our sats are so low powered they require extraordinary measures to
> receive.
What would you consider "extraordinary"? I'd consider shooting a signal
across a couple of hundred miles line-of-sight with 5W on VHF and a
3-element yagi to be not *that* extraordinary.
Gordon
------------------------------
_______________________________________________
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 214
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