Hi,
I've been listening on a couple of ARISSat-1 passes, both with the bird in
sunlight. The first time I vaguely heard what might have been a voice. The
second time (and this one was 80 or 85 degrees elevation) I could clearly
hear that there was a voice, but could not understand,
An Oscar number has several specific requirements which must be met,
including but not limited to, coordination PRIOR to flight.
That didn't happen so far as I know.
Bob
N4Hy
On Mon, Aug 8, 2011 at 4:17 PM, Nigel A. Gunn, W8IFF/G8IFF
ni...@ngunn.netwrote:
Depends whether you can define the
On 8/8/11 5:23 AM, g0...@aol.com wrote:
I've been tracking doppler by hand. Seems to work OK but it's very
important to keep the CW in the 'blue' window. I would think jumps
would not be good. Perhaps frequent doppler updates. - So very small
jumps.
Jumps per se are not a problem. I.e., if
On 8/8/11 6:09 AM, Alan P. Biddle wrote:
Rich,
Orbital dynamics are not all that intuitive.
That's absolutely right. Some historical trivia: even NASA tripped over
this in the early days. When the Gemini IV crew tried to rendezvous with
their spent booster, they kept missing. They were
Hi.
I am Mrs Nayer from polytechnic(Amir Kabir) university in tehran IRAN,
Telecommunication engineering student in MA degree and dont have callsign.
Best Regards.
On Tue, Aug 9, 2011 at 1:18 AM, nh6vb Scheller nh...@msn.com wrote:
Mr. Mahdinejad
There should be no problem receiving
hi All,
I have just come across this podcast which has a very British approach to
space history but is quite enjoyable
http://audioboo.fm/boos/431009-space-boffins-podcast2
Additionally a rather longer film entitled first orbit - this has the
exactly the same running time as Gargarin's flight
Henk,
Was the pass high or low elevation? I had a pass this morning, all in high
power mode, with a 55 degree maximum elevation. Before TCA, I was able to
access the transponder easily. After TCA, it was much harder at the same
ranges. The CW and TLM signals were about the same. It is
These modes are confusingly named. The transmit power is the same in
both; what changes is the power consumption. Better to think of it as
high vs low duty cycle. I don't recall the low power duty cycle for
sure, but it's something like 40 seconds on/2 minutes off. This
happens
Mike,
High and low power refers more accurately to power consumption rather than
transmitted power. Low power means a less than 100% duty cycle. Many of
the popular tracking programs such as SATPC32 and MacDoppler will tell you
when the satellite is in daylight or eclipsed. A spacecraft is
I gather ARISSat-1's total power output is 500 milliwatts.
How many milliwatts of that is allocated to each of these downlinks
- FM transmitter
- BPSK Beacon
- CW beacon
- Transponder
I couldn't find the figures on a quick read through the ARISSat.org they may be
there somewhere but I didn't
Hi Trevor
FM 250mW
BPSK 100mW
CW 25mW
SDX 125mW
From QST article thats available online.
Regards
David G0MRF
I gather ARISSat-1's total power output is 500 milliwatts.
How many milliwatts of that is allocated to each of these downlinks
- FM transmitter
- BPSK Beacon
- CW beacon
-
Please see here:
http://www.qsl.net/py4zbz/arissat.htm#e
73 de Roland PY4ZBZ
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Thanks David,
For those who've not yet read it the excellent QST ARISSat-1 article is at
http://web.me.com/clintbradford/Work-Sat/ARISSat-1_files/QST-ARISSat1.pdf
73 Trevor M5AKA
--- On Tue, 9/8/11, g0...@aol.com g0...@aol.com wrote:
FM 250mW
BPSK 100mW
CW 25mW
SDX 125mW
From QST
Before I destroy these, is anyone using Mirage KP-2 mast mounted preamps with a
Yaesu FT-847?
I picked up a couple of them recently, and they came with the control box
(which appears to be a bias tee) that supplies 12 volts via the coax line, in
order to power them.
The FT-847 can already
Hello there.
I would just like to to say a big thank's for all the information given.
It's all you good people that help to keep this hobby going by helping us
who are not so clued up.
Cheers and beer's
Kev De MM0KJG
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Ballots must arrive at the AMSAT Office by the close of
I know some of you have been asking about this for a while. I will be heading
up north into grid FN05 this weekend and should be able to make some contacts
on the arrow from FN05 in Ontario this weekend. If you worked me last week in
FN04/14 and want a qsl, pls contact me via email or send a
Sebastian,
The bias T is for powering up the preamp if you didn't have the radio
that supplied power. I have these preamps and work well with my
IC-910 when I use them.
Good Luck,
Dee, NB2F
-Original Message-
From: amsat-bb-boun...@amsat.org [mailto:amsat-bb-boun...@amsat.org]
On Behalf
Is it possible to record all the transmissions in a single wave file
using FCD and separate the FM, telemetry, ssb, and SSTV later after the
bird is gone?
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Not an AMSAT-NA
Hi Floyd,
Yes, you can. Recording the full 80kHz bandwidth for a 10 min pass
(duration of ARISSat-1 passes, roughly) creates a BIG wavefile around 250MB
in size. You can play it back and decode whatever you want, whenever you
want.I've been doing that regularly, which results in about 1GB
You can get an idea of how close to eclipse a satellite is by watching Delphi
tonight as it approaches daylight . It is solar only and will power up just
before aos shadow reaches the daylight line on Satpc32 tracker . Interesting to
watch.
Jerry WB5LHD
RADIOSCAF-B
1 37772U 98067CK 11221.51416027 .00028252 0-0 33672-3 0 151
2 37772 051.6389 252.3218 0013261 062.6127 072.5778 15.60751789 814
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Not an AMSAT-NA
Dont know about those particular ones, but I am using a pair of Dressler mast
mounted pre-amps with the 847. I supply the 12 V via the coax and they perform
beautifully.
Cheers,
Andreas - VK4FHAW
--- On Tue, 9/8/11, Sebastian, W4AS w...@bellsouth.net wrote:
From: Sebastian, W4AS
I don't think it's rare, but if anyone needs EM84 on satellite, drop me an
email for a schedule tonight or tomorrow. High elevation passes are best, and
preferably on 29 or 52.
73, Drew KO4MA
Sent from my iPhone
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On 9 Aug 2011 at 1:01, Phil Karn wrote:
Jumps per se are not a problem. I.e., if you're off frequency, the
sooner you correct it the better; there's no need to tune back
gradually. The error correcting code I'm using is pretty strong but it
does have its limits, and being significantly off
Greg. well all I can say is that anyone who says that the US has virtually
abandoned crewed spaceflight is not up on current events. What we are doing
is transitioning from a program of the military industrial complex to one which
centers on private enterprise...and that will open space
On 8/9/11 4:56 AM, Alan P. Biddle wrote:
when the satellite is in daylight or eclipsed. A spacecraft is often
illuminated when the ground track is in darkness, though the passes you
mentioned would be in eclipse.
It's very easy to tell just by looking at a tracking map whether a
spacecraft
It's been suggested that I modify my ARISSat-1 BPSK-1000 telemetry
demodulator/decoder to accept wideband quadrature (I Q) recordings
like those produced by most of the software defined radios out there.
This is fundamentally not that hard, but first I need some information.
How many people
On my last morning pass 10deg i was able to get one KURSK frame and one
forwarded nothing yet on the TLM screen. Experiment in progress...
Auto doppler tracking will be very usefull i think?
-
Luc Leblanc VE2DWE
Skype VE2DWE
www.qsl.net/ve2dwe
DSTAR urcall VE2DWE
WAC BASIC CW PHONE SATELLITE
With all due respect Robert, I think this is a pipe dream. The current
global economy is in serious, serious shape. 'Private Enterprise' may indeed
get into the field but even private enterprise operates on cash. Playing
around in space is way down on the food chain in these conditions. NASA has
Hi All,
I've been recording quite a few passes of ARISSat-1 using the Funcube Dongle
(FCD) SDR and the HDSDR program. The resulting file from a 10 min pass,
recording the whole FCD passband, is about 250MB. Below is a link to a sample
from this morning. The bird was in the sun, so it's
My thanks to everyone who has responded. 4 out of 4 say it's ok to use the 847
to power the preamp.
I put up the 432 one today, but with the KP2 control box, just in case. But I
will go ahead and remove the box, and let the 847 power it.
One interesting response was to be careful if there is
I agree, that there is change that can happen. Here's my view on what I really
think are the issues.
I was specifically referring to the notion that funding is the problem.
Funding will be the issue that allows change to actually happen, and at what
speed it can happen. Money availability is
RADIOSCAF-B
1 37772U 98067CK 11221.57842078 .00028171 0-0 33574-3 0 168
2 37772 051.6389 251.9980 0013262 062.7903 073.7008 15.60755012 822
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Not an AMSAT-NA member?
I agree on the possibility of some line loss to the unit. The longer the
coax run the more problems you may have with it properly switching. I
found this to be especially true of the early models of the Mirage mast
mounted preamps. Even the power T can be a problem if the wire run is
long.
On this, would it be possible to power preamps for 70cm and 2m through coax
if the antennas are split using a diplexer? Or would 12v go to both on TX
and fry one of them?
Tim
K6TW
-Original Message-
From: Sebastian, W4AS [mailto:w...@bellsouth.net]
Sent: Tuesday, August 09, 2011 4:41
Steve Belter, N9IP has put together an excellent tutorial on setting and
using HDSDR especially with the FCD.
Find it in the Yahoo group
http://uk.groups.yahoo.com/group/funcube/files/User%20Guides/
Gould, WA4SXM
- Original Message -
From: Mark L. Hammond marklhamm...@gmail.com
To:
... [candidates] ... Barry ... Alan ... Steve ... Drew ... Mark ... Tony ...
Patrick ...
Gawd, with all that talent and dedication, I wish the board would have made a
proclamation that the board would consist of THREE one-year termers. AMSAT-NA
could use ALL their experience for our future.
Look carefully at the power consumption on the preamp. If it is less
than the max for the 847 (which I forget the maximum current), you could
use it powered from the radio. BUT pay careful attention that anything
between the radio and the preamp does not provide a dead short from
center
Thank you for the SO-50 contacts today. I'll be here for the week and will try
to make as many of the midday passes as possible
In the haste of things today, I think I slipped up a few times and said DN53
instead of EN53. My apologies, CRS kicking in I guess.
Please email me for a QSL and
You can't compare reception of ARISSat-1 to the ISS... The Kenwood radio on
the ISS transmits with something like 20 times the power that ARISSat-1
does! How well you hear the OTHER low earth orbit satellites like AO-27,
AO-51, and SO-50 will tell you a lot more about the effectiveness of
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