Hi,
AMSAT can open a Project at KICKSTARTER in technology tag.
https://www.kickstarter.com/discover/categories/technology
I saw a lot of project getting 300, 400% more than originally goal. Some of
then looks like a stupid idea, but that´s no matter they get the found´s,
and what make no sense fo
Is there some reason why a digital signal cannot be passed thru an
analog/linear transponder? What goes in is what comes out. It seems the lack
of transponder bandwidth limits the digital signal experimenter...
Maybe that is why commercial transponders on satellites are linear. They can
take any
On 07/19/2014 09:23 PM, Robert Bruninga wrote:
> I cannot believe that. The equilibrium of a nominally black (solar panels
> on all sides) spacecraft is something like about 0 to 30 C (32F to 90F) a
> very benign operational range. The only time you DO have thermal issues is
> when you DO have a
Hi group im now qrv this week for 7 days from 20.july from io87mc de paul
2M1EUB/P ...2E1EUB
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Subscript
Hi All,
I could start writing all kinds of angry E-mails, but I have always
resisted to reply on these kind of threads.
I'm glad the AMSAT-BB is not reflecting the great community that is amateur
radio and the many exciting things we are doing for our community to keep
communications alive.
I wi
- Amateur Radio has many diverse interests.
CW, Rag Chew, RTTY, SSTV, Contests, DX, Repeaters, D-Star, EME, Phil's
latest digimode ...
- These diverse interests can coexist.
There are occasional gripes about things that conflict but for the most
part it is live and let live.
- Amateur Radio sat
John,
If both side have good Doppler correction then it can be done, but you have
to choose the correct mode as there are other issues even if the Doppler
correction is perfect, especially when the range is changing at its maximum,
for example as the satellite passes overhead.
Simon Brown G4ELI
h
I was not going to post but since no one else has, I thought there needs to be
a correction to a statement made in case some younger people are reading the
thread.
Phil said:
"Good analogy, actually. They returned to the moon six times (succeeding
on five) because they had excess hardware origi
I need to receive the foot in mouth award. The key word I read past was "They
RETURNED to the moon six..." I'll just go back to the my radios and hide.
Sent from Rick's iPad2
> On Jul 20, 2014, at 9:27 AM, Rick Walter wrote:
>
> I was not going to post but since no one else has, I thought ther
430-450 Mhz Amplifier FM/SSB/CW 2 watts in - 40 watts output. Works great
for Mode B satellites. $58 includes flat rate Priority shipping lower 48.
Thanks,
Pat K9HF
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Not an AMS
Im also qrv ao7 mode A if there are any takers? de paul 2M1EUB
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I must quickly point out some real data:
www.warehouse.funcube.org.uk
Which shows an equilibrium of around +20 degrees after 64 minutes of sunlight.
Black solar cells on a black surface but some polished Aluminium in the
structure.
During eclipse, The Earth facing side begins to increase in
Hi!
I plan on working several passes from grid FN56 in Maine, starting with the
AO-7 pass at 1727 UTC. After a couple of hours up there, I will head back
towards southern Maine or New Hampshire for the night. Hope to work lots of
stations, including some in Europe.
Time permitting, and dependi
Hi Phil,
The reality is, even with no battery heater on FUNcube-1 we seem to have an
acceptable battery temperature of between 0 and +5C. The temp sensor is, of
course, actually external to the battery itself.
Our orbit is sun synchronous so we "suffer" eclipses for approx 33% of the
orbit .
On Sunday, 20 July 2014, 15:37, paul robinson wrote:
Im also qrv ao7 mode A if there are any takers? de paul 2M1EUB
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a different slant-not wanting to enter the fm vs linear ongoing debate or the
"easy sat" concept-I started satellites not because it was easy, but because it
was hard, and at times still is! This was back in the days of the RS
satellites. I believe if you present the challenge they will come.
Congrats to N5JF Joseph Fouquet for GOT Grids ? award #14
Thanks
WA4HFN em55
www.starcommgroup.org
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Getting the $125,000 to launch a 1U cubesat into LEO should be plenty
doable, but raising $10-$15 million for a launch to HEO?
AMSAT-DL has been raising funds for P3E now for nearly a decade. If
they thought they had a chance of success, I'm sure there'd be a much
more public push to raise those f
On 7/20/2014 12:00 PM, Paul Stoetzer wrote: IN PART
The bottom line is that AMSAT-NA needs a significant boost in
membership and visibility and that boost needs to be soon.
I gave up on AMSAT when it seemed that the main afford was put into
FM in and FM out satellites. Membership ran out many (
Anyone have any updated news on this one? I haven't heard much since launch.
I'm curious how the primary mission is going.
73, Drew KO4MA
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The Fox-1 series of satellites will lead to the Fox-2 series with many
more interesting modes and capabilities. Yes, the priority is on
building and launching the Fox-1 series, but a good portion of that
work will be done by next year and then the lessons learned can be
applied to constructing and
Patrick,
Thank you for the eye-ball at the ARRL Convention, and the
new grid today on SO-50.
Congrats to Drew (KO4MA) for his last grid east of the
Mississippi (same pass -- at least that's what I heard).
Bill W1PA
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AC0RA tells me that he worked both Patrick in FN56 and F6CTW on the
1727 UTC AO-7 pass using just 5 watts from an FT-817 and a half Arrow
(4 of the 7 70cm elements) for his uplink.
Maximum elevation of the pass for AC0RA was just 2 degrees.
It doesn't take much power or even antenna to get into t
Yes!!! Great job from Patrick making that run up there after a full weekend
of AMSAT work at the ARRL Centennial. The man walks the walk!
Pending two cards that are in the mail from a sure-thing QSLer, FN56 will be
the last US grid east of the Rockies for me! I just updated my confirmed
grid map o
This is great news.
I thank all the AMSAT volunteers, past and present for this opportunity.
GO FOX, GO!
73
Clayton
W5PFG
On Jul 18, 2014 2:11 PM, "Joseph Spier" wrote:
> AMSAT NEWS SERVICE
> ANS-199
>
> The AMSAT News Service bulletins are a free, weekly news and infor-
> mation service of A
I personally am going to ask my local Amateur Radio Club to throw a donation
on the Fox 1C project. I challenge you to present the same request along to
your own local clubs.
I do numerous Radio Merit Badge presentations for the Boy Scouts and one of
the things I love to do is to throw in a satel
AMSAT-NA Members:
After the 2014 AMSAT-NA Board of Directors election ballots were mailed, we
were notified by our
printer that old stock return envelopes were inadvertently included. These
have the old Silver
Spring, MD address. The ballot postcard and other documents have the correct
Kensin
Okay,
This is pretty much the same discussion we use to have at the AMSAT meetings
at Godard in the 1980s.
The problem is and always will be resources (man power and money)
More technology vs the average user. And now who is the average user - the
low cost FMers or the Linear Transponder gu
On 07/20/2014 03:45 AM, John / NS1Z wrote:
> Is there some reason why a digital signal cannot be passed thru an
> analog/linear transponder? What goes in is what comes out. It seems the
> lack of transponder bandwidth limits the digital signal experimenter...
> Maybe that is why commercial transpon
Yes, that is exactly the temperatures of PCSAT in similar eclipse periods.
IE, anything more or less uniformly BLACK (solar panels) no matter the
shape and size will assume that average temperature with 35% eclipses.
This is because the absorbtivity and emissivity of "black" are both 0.9.
(assumin
Thanks for the FOX-1 thermal data! (36 C variation per orbit)
PCSAT (10" cubesat) has less than 15C variation on its sides with its 0.6
RPM spin and 35% eclipses, but this is because the sides are made of 1/8"
aluminum and have a huge 1/8" center deck that is thermally connected to
the center of
Hummh,
We get an equilibrium of a cube to be about 55F (13C) when exposed to the
sun on one side and all the other sides radiating to cold space. (assuming
they are thermally connected).
I wonder why the big difference between our calculations?
Bob, WB4aPR
On Sun, Jul 20, 2014 at 6:59 AM, Phil K
On 07/20/2014 03:45 AM, John / NS1Z wrote:
> Is there some reason why a digital signal cannot be passed thru an
> analog/linear transponder? What goes in is what comes out.
I forgot to mention that a FM repeater is not a linear transponder.
Although FM is constant envelope and a FM RF power ampli
Good evening,
Thanks to Shane, NV7SW, in Nevada, I have now worked 49 states on the
satellites. All that remains is Hawaii, a significant challenge. AO-7
is the only satellite with a footprint that reaches both the DC area
and Hawaii; suitable passes generally occur every other day, with
maximum e
On 07/19/2014 09:23 PM, Robert Bruninga wrote:
> Yes, but with who? 95% of everyone in view is more than 45 degrees OUT of
> the main beam. Directional antennas have zero value on LEO birds that need
> to serve everyone in view at the same time. And if you only serve those in
> the main beam, t
I'm all in favour of new modes and new technology. Pushing the
boundaries should be a primary goal. But before any new bird is put in
the sky, surely the target audience must be considered?
I'd hazard to guess that the 'average' shack has multi-mode HF
capability, along with VHF/UHF FM. Som
On 07/20/2014 06:10 AM, Thomas Doyle wrote:
> - What the majority wants is more important than any individual want.
>
> How do you determine what the majority wants.
>
> - Voting
The results of an election are strongly determined by who gets to vote.
If you poll the tiny fraction of the amateu
It was the space program that persuaded me to study engineering and
also to become involved with satellites.
Many thanks to all who made the events of that day possible.
73s
Bernhard VA6BMJ @ DO33FL
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On 07/20/2014 06:13 AM, Simon Brown wrote:
> John,
>
> If both side have good Doppler correction then it can be done, but you have
> to choose the correct mode as there are other issues even if the Doppler
> correction is perfect, especially when the range is changing at its maximum,
> for example
On 07/20/2014 06:27 AM, Rick Walter wrote:
> I was not going to post but since no one else has, I thought there needs to
> be a correction to a statement made in case some younger people are reading
> the thread.
>
> Phil said:
> "Good analogy, actually. They returned to the moon six times (suc
I concur , Bernhard. It was rewarding for me to be able to work with school
students and do ISS Contacts with astronauts that really got me
interested in
working different satellites. Possibilities are unlimited... I support
AMSAT.
73,
Dale-KL7XJ
On 7/20/2014 7:05 PM, B J wrote:
It was t
I'll finally charm in on this.
Don't also forget that the AMSAT membership hardly pays for its
> satellites. The volunteer engineering that goes into each one of them is
> easily worth millions of dollars at market rates. And it must be
> understood that there is no such thing as a volunteer willi
On 07/20/2014 08:09 AM, Graham Shirville wrote:
> Hi Phil,
>
> The reality is, even with no battery heater on FUNcube-1 we seem to have
> an acceptable battery temperature of between 0 and +5C. The temp sensor
> is, of course, actually external to the battery itself.
You must be using different s
I'm limited to indoor antennas for all my amateur operations, including
satellite operation. Right now, I'm running a 6 element 2 Meter yagi,
along with the 7 element 432 beam (part of an arrow antenna). I have
room to rotate a larger, and longer 432 antenna, and I'd love to have
more gain.
M
On 07/20/2014 10:00 AM, Paul Stoetzer wrote:
> A good number of
> amateur radio operators are only vaguely aware of the amateur
> satellite program and consider it to be quite esoteric.
Precisely. Huge az/el yagi arrays don't help that image either.
Nor does an occasional, brief, noisy pass of a
Hi, Les
I've been using an M2 420-50-11 for satellite use for years now, and it
works great.
Not as much gain as the old KLM 30-element CP antenna I have, but then
it's not 10' long either!
Check it out at the M2 website:
http://www.m2inc.com/index.php?ax=amateur&pg=103
73, Jim KQ6EA
On 07/20/2014 04:58 PM, Robert Bruninga wrote:
> Hummh,
>
> We get an equilibrium of a cube to be about 55F (13C) when exposed to the
> sun on one side and all the other sides radiating to cold space. (assuming
> they are thermally connected).
>
> I wonder why the big difference between our calcu
On 07/20/2014 08:00 PM, Gus wrote:
> I'd hazard to guess that the 'average' shack has multi-mode HF
> capability, along with VHF/UHF FM. Some lesser number of 'average'
> shacks will have multi-mode VHF/UHF, or could readily acquire that
> capability without too much expenditure in resources (tim
On 07/20/2014 08:42 PM, Bryce Salmi wrote:
> Cubesats are standardizing AMSATs satellites and there's much much more to
> the satellite than simply the amateur radio mode used to communicate. If I
> do my job right, and others working on their Fox-1 subsystems do their jobs
> right too, you will n
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