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CX2SA > SATDIG 22.01.12 02:49l 1136 Lines 42301 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. High sierra converters (Joe Leikhim)
2. Re: High sierra converters (Bill Ress)
3. Re: High sierra converters (Alan P. Biddle)
4. Re: High sierra converters (Alan P. Biddle)
5. Re: Hamtronics receive converters (WILLIAMS MICHAEL)
6. Re: Thanks for all the ... (i8cvs)
7. Quadrifilar Helix antenna question (William Leijenaar)
8. Re: Thanks for all the ... (Andre)
9. Re: Quadrifilar Helix antenna question (i8cvs)
10. Re: Testing a UHF antenna (normn3ykf@xxxx.xx.xxxx
11. Quadrifilar antenna (Dave Guimont)
12. ANS-022 Bulletins (Dee)
----------------------------------------------------------------------
Message: 1
Date: Sat, 21 Jan 2012 15:17:23 -0500
From: Joe Leikhim <rhyolite@xxxxxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] High sierra converters
Message-ID: <2259C110-E6D4-453F-A954-A5405D76EF0B@xxxxxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
Is there a typo in the specs of their 435 and 145 MHz converters? The
frequency stabilities are specified at a whopping 25 ppm.
Sent from my iPod
------------------------------
Message: 2
Date: Sat, 21 Jan 2012 12:38:50 -0800
From: Bill Ress <bill@xxxxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: High sierra converters
Message-ID: <4F1B225A.1040000@xxxxxxxxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Joe,
The spec reads "+/- 25 PPM versus operating temperature" which is
typical for a crystal oscillator in that frequency range.
Regards...bill - N6GHz
On 1/21/2012 12:17 PM, Joe Leikhim wrote:
>
> Is there a typo in the specs of their 435 and 145 MHz converters? The
frequency stabilities are specified at a whopping 25 ppm.
>
> Sent from my iPod
> _______________________________________________
> 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
>
>
--
Regards...Bill Ress
High Sierra Microwave
------------------------------
Message: 3
Date: Sat, 21 Jan 2012 14:40:55 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
To: "'Joe Leikhim'" <rhyolite@xxxxxxxx.xxx>, <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: High sierra converters
Message-ID: <CBB7A358468E4162B791E8A773E5B330@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
Looking around at other, similar devices they carry, they show 2.5 PPM.
Probably just a missing decimal point.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Joe Leikhim
Sent: Saturday, January 21, 2012 2:17 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] High sierra converters
Is there a typo in the specs of their 435 and 145 MHz converters? The
frequency stabilities are specified at a whopping 25 ppm.
Sent from my iPod
_______________________________________________
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: 4
Date: Sat, 21 Jan 2012 14:42:02 -0600
From: "Alan P. Biddle" <APBIDDLE@xxxxxx.xxx>
To: <APBIDDLE@xxxxxxx.xxx>, "'Joe Leikhim'" <rhyolite@xxxxxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: High sierra converters
Message-ID: <8F710419652049F0900DD89A86558CD9@xxxxxx>
Content-Type: text/plain; charset="us-ascii"
My mail crossed with Bill's. Corrected.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Alan P. Biddle
Sent: Saturday, January 21, 2012 2:41 PM
To: 'Joe Leikhim'; amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: High sierra converters
Looking around at other, similar devices they carry, they show 2.5 PPM.
Probably just a missing decimal point.
Alan
WA4SCA
-----Original Message-----
From: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx On
Behalf Of Joe Leikhim
Sent: Saturday, January 21, 2012 2:17 PM
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] High sierra converters
Is there a typo in the specs of their 435 and 145 MHz converters? The
frequency stabilities are specified at a whopping 25 ppm.
Sent from my iPod
_______________________________________________
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-NA member? Join now to support the amateur satellite program!
Subscription settings: http://amsat.org/mailman/listinfo/amsat-bb
------------------------------
Message: 5
Date: Sat, 21 Jan 2012 13:01:25 -0800 (PST)
From: WILLIAMS MICHAEL <k9qho6762@xxxxxxxxx.xxx>
To: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Re: Hamtronics receive converters
Message-ID:
<1327179685.99970.YahooMailClassic@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
John,
A big concern is transmitting into it. In the beginning, I used the
Hamtronics converter into a Ten Tec Corsair II HF rig. The Corsair has a aux
receiver input that can be selected which will completely eliminate any
possibility of RF damage to the converter. I've done my share of burning up
preamps so a person has to be careful.
I used the converter/TenTec, an IC-251A (2M/10W), and an 11 turn helix with
no preamp on FO20/29. It worked really well, but a preamp does help.
In fact, I used this original rig setup today to make three QSOs on FO-29.
It's still working well although there is now a SSB preamp out at the antenna.
If you have a two rig setup operating both "U" and "V" uplinks and switching
back and forth between rigs, somewhere along the line you'll make an error
and screw up. An aux receive input to the transceiver would be nice or just
setting the HF transceiver up so it can't be transmitted would be a second
choice.
If your interested in my Hamtronics CC432-5 converter (435-437 MHz to 28-30
MHz), give me an email or phone me.
73,
Mike (K9QHO)
------------------------------
Message: 6
Date: Sat, 21 Jan 2012 22:06:53 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "Andre" <sats@xxxxxx.xxxxx.xx>, "Amsat - BBs" <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Thanks for all the ...
Message-ID: <000001ccd881$1547a760$0401a8c0@xxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
----- Original Message -----
From: "Andre" <sats@xxxxxx.xxxxx.xx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, January 21, 2012 8:12 PM
Subject: [amsat-bb] Re: Thanks for all the ...
> Good point, a preamp is to cancel out the cable losses, anymore and you
> are just boosting the background noise and not improving the reception.
> So if your cable is very short there is not point in using a preamp.
>
> 73 Andre PE1RDW
Hi Andre, PE1RDW
It depends on the noise figure NF of your receiver.
Lets suppose the NF of your commercial receiver is as usually in the order
of 6 dB, then a preamplifier with a NF = 0.5 dB and 15 to 20 dB gain will
improuve your (S+N)/N ratio even if the lenght of your coax cable between
the antenna and receiver is very short.
73" de
i8CVS Domenico
------------------------------
Message: 7
Date: Sat, 21 Jan 2012 14:19:11 -0800 (PST)
From: William Leijenaar <pe1rah@xxxxx.xxx>
To: "amsat-bb@xxxxx.xxxx <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Quadrifilar Helix antenna question
Message-ID:
<1327184351.14178.YahooMailNeo@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Hi AMSAT's,
Because I can not set up my rotor/elevation system at the new QTH, I try to
get some omni antenna's to be active on the OSCAR's.
I made a 2m version and 70cm version from some calculation website
(www.jcoppens.com)? on the internet. Unfortunately both were too low
resonant in frequency. Cutting the lengths shorter, (to get a higher
resonance frequency) didn't work well, as I got too short elements at a
certain time and the mechanical construction didn't allow more shorter
elements.
So I started all over again, this time taking the well known Rothamel
antenna book as example. There is an GPS example which I re-calculated to a
70cm version and combined it with an infinite balun that is also described
one page further. For the elements (one element as infinite balun) I used
Aircell-7 coaxial cable. When I measured this antenna it surprisingly had
also a too low resonance frequency, some 60MHz lower then the expected
435MHz... Another thing I noticed is that the return loss is around 10dB
best case for this kind of helix antenna (that's at 375MHz resonance). It
gets better when I touch the elements, but that should not be the way it
should work...
Does anyone has experience with quadrifilar helix antenna's on 2m and 70cm
for TX ?
When using the infinite balun principle, should it be a number of 1/4
wavelength ? or should it fit the antenna element length ?
Because the quadrifilar element length (=infinite balun length) was shorter
than 3/4 lambda length. Due to this fact I actually expected a higher
resonance frequency, but it went out the opposite way.
FYI: The supporting of the elements is all done with PVC tubes, to avoid any
metal influence.?
Kind regards,
73 de PE1RAH, William Leijenaar
---
------------------------------
Message: 8
Date: Sat, 21 Jan 2012 23:27:23 +0100
From: Andre <sats@xxxxxx.xxxxx.xx>
To: Amsat - BBs <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Thanks for all the ...
Message-ID: <4F1B3BCB.305@xxxxxx.xxxxx.xx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Op 21-1-2012 22:06, i8cvs schreef:
> ----- Original Message -----
> From: "Andre"<sats@xxxxxx.xxxxx.xx>
> To:<amsat-bb@xxxxx.xxx>
> Sent: Saturday, January 21, 2012 8:12 PM
> Subject: [amsat-bb] Re: Thanks for all the ...
>
>> Good point, a preamp is to cancel out the cable losses, anymore and you
>> are just boosting the background noise and not improving the reception.
>> So if your cable is very short there is not point in using a preamp.
>>
>> 73 Andre PE1RDW
> Hi Andre, PE1RDW
>
> It depends on the noise figure NF of your receiver.
> Lets suppose the NF of your commercial receiver is as usually in the order
> of 6 dB, then a preamplifier with a NF = 0.5 dB and 15 to 20 dB gain will
> improuve your (S+N)/N ratio even if the lenght of your coax cable between
> the antenna and receiver is very short.
>
> 73" de
>
> i8CVS Domenico
>
>
true you can add a 5,5 dB improvement that way but you are talking EME
class LNA, about 60 usd per dB is far more then most hams are willing to
pay.
a more reasonable priced preamp is more likely to be around 1.5 dB NF
and would probably cost around 35 usd per dB improvement.
However you still run the risk over overloading your reciever frontend
with strong signals because you are not only boosting the satelite by 15
to 20 dB but also the athmospheric noise and other inband signals while
you only needed 6 dB to overcome the NF of the reciever.
by the way my ts790 is measured by DJ5IR at 4.5 dB NF so a typical
preamp would only improve by 3 dB at the cost of lowering my IP3 from
-14.5 dBm to -29.5 dBm, granted not everyone would do a portable
opperation with a ts790 but I do.
a more typical portable reciever is probably a ft817 and is measured at
5.4 dB NF by DK2DB.
http://www.df9ic.de/tech/trxtest/trxtest.html
BTW I know that the real IP3 stays the same but the offending signals
are boosted giving a virtual worsening of the IP3
73 Andre PE1RDW
------------------------------
Message: 9
Date: Sun, 22 Jan 2012 00:01:32 +0100
From: "i8cvs" <domenico.i8cvs@xxx.xx>
To: "William Leijenaar" <pe1rah@xxxxx.xxx>, "AMSAT-BB"
<amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] Re: Quadrifilar Helix antenna question
Message-ID: <01e801ccd890$9e701ea0$0401a8c0@xxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi William, PE1RAH
In a separate email I have sent to you copy of my article "Experimental
Investigation of Quadrifilar Helix Antennas for 2400 MHz that was published
into the AMSAT Journal May/June 2004 particularly covering the infinite
balun theory and applications if you need a End-Fire or Back-Fire radiation
from the Antenna.
Also I added an article written by Walter Maxell W2DU one the well know
guru about the Helix Antennas.
Finally I have added an artiche that I have written for Radio Rivista about
a QFA for 70 cm but sorry it is in italian but you can read the drawings.
Best 73" de
i8CVS Domenico
----- Original Message -----
From: "William Leijenaar" <pe1rah@xxxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, January 21, 2012 11:19 PM
Subject: [amsat-bb] Quadrifilar Helix antenna question
Hi AMSAT's,
Because I can not set up my rotor/elevation system at the new QTH, I try to
get some omni antenna's to be active on the OSCAR's.
I made a 2m version and 70cm version from some calculation website
(www.jcoppens.com) on the internet. Unfortunately both were too low resonant
in frequency. Cutting the lengths shorter, (to get a higher resonance
frequency) didn't work well, as I got too short elements at a certain time
and the mechanical construction didn't allow more shorter elements.
So I started all over again, this time taking the well known Rothamel
antenna book as example. There is an GPS example which I re-calculated to a
70cm version and combined it with an infinite balun that is also described
one page further. For the elements (one element as infinite balun) I used
Aircell-7 coaxial cable. When I measured this antenna it surprisingly had
also a too low resonance frequency, some 60MHz lower then the expected
435MHz... Another thing I noticed is that the return loss is around 10dB
best case for this kind of helix antenna (that's at 375MHz resonance). It
gets better when I touch the elements, but that should not be the way it
should work...
Does anyone has experience with quadrifilar helix antenna's on 2m and 70cm
for TX ?
When using the infinite balun principle, should it be a number of 1/4
wavelength ? or should it fit the antenna element length ?
Because the quadrifilar element length (=infinite balun length) was shorter
than 3/4 lambda length. Due to this fact I actually expected a higher
resonance frequency, but it went out the opposite way.
FYI: The supporting of the elements is all done with PVC tubes, to avoid any
metal influence.
Kind regards,
73 de PE1RAH, William Leijenaar
---
_______________________________________________
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: 10
Date: Sat, 21 Jan 2012 18:02:42 -0500
From: <normn3ykf@xxxx.xx.xxx>
To: amsat-bb@xxxxx.xxxx domenico.i8cvs@xxx.xx
Subject: [amsat-bb] Re: Testing a UHF antenna
Message-ID: <20120121230242.WHZQF.160243.root@xxxxxxxxxxxxxxxx>
Content-Type: text/plain; charset=utf-8
Domenico:
Thank you so much for sending the article on your experiments in the 2400MHz
band. The author of the page does provide some information on connecting the
infinite balun.
It's here: http://jcoppens.com/ant/qfh/img/v2/012.jpeg
He also does provide a clue of performance of inverse connection of the
loops in simulation
here: http://jcoppens.com/ant/qfh/sim.en.php It's in the n'th column labeled
as .44inv
Re the meter and the cable: I need to find some connectors so that I can
make up a cable. Just finished a move and am still in the process of
decimating the boxes.
Will report back when I get a cable made.
73 de Norm n3ykf
> Hi Norm
>
> I was looking at http://jcoppens.com/ant/qfh/calc.en.php .
>
> but unfortunately there are not informations on how to connect the
> 4 by 1/2 wavelength loops to get End-Fire or Back-Fire radiation
> from the quadrifiliar helix antenna as well no information to get a
> 50 ohm match properly connecting the 4 terminals of the loops to
> the infinite balun so that I suggest you to read the article:
>
> "Experimental Investigation of Quadrifilar Helix Antennas for
> 2400 MHz" published into the AMSAT-Journal May-June 2004
>
> BTW, about your question the lenght of coax cable between the device
> under test and the antenna analyzer must be any even or odd numbar of
> 1/2 electrical waveleght of coax cable for the frequency in use where
> the 1/2 electrical wavelenght of the coax cable is the 1/2 free wave
> multiplied by the velocity factor Vf of the coax used i.e.Vf = 0.66 for
> RG-213
>
> When the lenght of any transmission line is 1/2 electrical waveleght the
> impedance at one end of it is the same at the other end of it i.e. the
> impedance of the antenna will be seen unchanged at the antenna analyzer
> input connector no matter the value of the VSWR.
>
> 73" de
>
> i8CVS Domenico
>
>
>
>
>
>
>
------------------------------
Message: 11
Date: Sat, 21 Jan 2012 15:49:29 -0800
From: Dave Guimont <dguimon1@xxx.xx.xxx>
To: pe1rah@xxxxx.xxx
Cc: amsat-bb@xxxxx.xxx
Subject: [amsat-bb] Quadrifilar antenna
Message-ID: <0C.E9.15128.80F4B1F4@xxxxxxxxxxxxx.xxxx.xx.xxx>
Content-Type: text/plain; charset="us-ascii"; format=flowed
I've used them with great success at 435 and 2 m.
Go to:
http://tinyurl.com/wb6lloOscar
and see quadrifilar antenna articles...happy to answer any questions..
Follow dimensions carefully on 435..
73, Dave, WB6LLO
dguimon1@xxx.xx.xxx
Disagree: I learn....
Pulling for P3E...
------------------------------
Message: 12
Date: Sat, 21 Jan 2012 20:41:44 -0500
From: Dee <morsesat@xxxxxxxxx.xxx>
To: ans <ans@xxxxx.xxx>
Cc: Amsat BB <amsat-bb@xxxxx.xxx>
Subject: [amsat-bb] ANS-022 Bulletins
Message-ID: <000901ccd8a6$ffd7b840$ff8728c0$@xxxxxxxxx.xxx>
Content-Type: TEXT/PLAIN
AMSAT NEWS SERVICE
ANS-022
ANS is a free, weekly, news and information service of AMSAT North
America, The Radio Amateur Satellite Corporation. ANS reports on the
activities of a worldwide group of Amateur Radio operators who share an
active interest in designing, building, launching and communicating
through analog and digital Amateur Radio satellites.
Please send any amateur satellite news or reports to:
ans-editor@xxxxx.xxx
In this edition:
* Fox-1: Solar Panel Campaign
* Amateur Radio Help Needed for RS-39 Deployment on January 25
* SKN on OSCAR 2012 Best Fist Nominations Due
* University of Liege Students Provide Update on OUFTI-1 D-Star Cubesat
* More University Cubesat Projects Rolling Out
* NASA Launches STEMconnector Website
* Satellite Shorts From All Over
* Winners of AMSAT ARISSAT-1/KEDR Contests Announced
* ARISS Status Report - 9 January 2012
SB SAT @ AMSAT $ANS-022.01
ANS-015 AMSAT News Service Weekly Bulletins
AMSAT News Service Bulletin 022.01
From AMSAT HQ SILVER SPRING, MD.
January 22, 2012
To All RADIO AMATEURS
BID: $ANS-022.01
Fox-1: Solar Panel Campaign
As AMSAT embarks on the Fox-1 Project, here is an opportunity to
literally put your callsign on the Fox hardware. AMSAT is looking for
major donations to help underwrite the cost of solar cells/ panels, one
of the more significant expenses of the project. These solar cells are
needed for the flight unit as well as for the a flight spare. As Fox-1
will have solar cells on all six sides of the spacecraft and given the
relatively small surface area avail- able on each side (at most 4" by 4"
per side), AMSAT will invest in high efficiency solar cells to gain as
much power as possible to operate the spacecraft.
Complete details on how you can donate are posted on the web:
http://www.amsat.org - the top news item.
AMSAT President Barry Baines, WD4ASW, said, "We highlighted at the
recent 2011 Symposium that AMSAT is actively developing Fox-1, a new
spacecraft that is designed to replace AO-51. Fox-1 development now
takes on a great sense of urgency."
AMSAT Vice-President of Engineering, Tony Monteiro, AA2TX says,
"Fox-1 will advance single-channel FM repeater satellite operation
beyond the experience of AO-51. It will advance AMSAT to the next
generation of AO-51 class satellites."
Fox-1 is designed for longer operational life with these features:
+ Fox-1 is designed to operate in sunlight without batteries once
the battery system fails. This applies lessons learned from AO-51
and ARISSat-1 operations.
+ In case of IHU failure Fox-1 will continue to operate its FM
repeater in a basic, 'zombie sat' mode, so that the repeater
remains on-the-air.
+ Fox-1 is designed as the immediate replacement for AO-51. Its U/V
(Mode B) transponder will make it even easier to work with modest
equipment.
+ From the ground user's perspective, the same FM amateur radio
equipment used for AO-51 may be used for Fox-1.
+ Extending the design, Fox-2 will benefit from the development work
of Fox-1 by adding more sophisticated power management and Software
Defined Transponder (SDX) communications systems.
Barry concluded, "AMSAT's ability to provide a replacement spacecraft
and get it launched is dependent upon the active support of donors who
wish to see Fox-1 fly."
Several opportunities to make your donation to keep amateur radio in
space include:
+ Return the form sent with the letter to reply with your donation
for the Fox-1 Project.
- All donations over $40 will receive a Fox pin.
- Donations of $120 or more qualify you for AMSAT President's Club
+ Call Martha at the AMSAT Office +1-888-FB AMSAT (1-888-322-6728)
+ Paypal donation widget on the main page at: http://www.amsat.org
+ Paypal donation widget for Project Fox at:
http://www.amsat.org/amsat-new/fox/
+ You can also go to the Paypal site and send your donation to
martha@xxxxx.xxx.
+ The AMSAT Store: http://www.amsat-na.com/store/categories.php
Project Fox web site provide a good overview of the technical progress
of the new satellite: http://www.amsat.org/amsat-new/fox/
[ANS thanks AMSAT President Barry Baines, WD4ASW, and AMSAT's Project
Fox Engineering team for the above information]
---------------------------------------------------------------------
Amateur Radio Help Needed for RS-39 Deployment on January 24
The Chibis-M satellite,RS-39 is planned to be deployed from the Pro-
gress M-13M cargo ship into a 500 km orbit on January 24 at approxi-
mately 23:00-23:59 UTC.
RS-39 has CW beacons on 435.315 and 435.215 MHz that can be received
directly by radio amateurs and schools for educational outreach pur-
poses. Telemetry will be transmitted on these downlink frequencies.
The RS-39 Morse Code telemetry format is available as an MS-Word
document from: http://tinyurl.com/RS-39-Morse-Code-Telemetry
The RS-39 team is requesting support from amateur radio operators
for any reception reports of Chibis-M. Special attention is needed
during the first orbits as these are outside the range of control
stations. Each report will be confirmed by special QSL card.
The Space Research Institute of the Russian Academy of Sciences
(RAS) will activate an e-mail address for radio amateurs around
to send reception reports. The http://chibis.cosmos.ru/ link is
in Russian at present. (http://tinyurl.com/RS-39-Chibis-M is
available in google English.)
Chibis-M arrived at the ISS on November 2, 2011 aboard the Pro-
gress M-13M cargo craft. It has been studying Terrestrial Gamma
Ray Flashes which are hypothesized to be produced by beams of
very energetic electrons, accelerated in the intense electric
fields generated by large thunderstorm systems.
On January 23, 2012 Progress M-13M will undock from the ISS. Pro-
gress will then perform two orbital maneuvers to raise its orbit to
500 km. On January 24 Chibis-M will separate from the Progress cargo
craft.
RS-39 also carries receivers listening between 0.1 - 40 kHz and
26-48 MHz for a space weather experiment.
Additional information can be found on these links:
http://www.uk.amsat.org/3910
http://www.energia.ru/en/iss/researches/geophis/19.html
[ANS thanks Trevor, M5AKA and AMSAT-UK for the above information]
------------------------------------------------------------------------
------
SKN on OSCAR 2012 Best Fist Nominations Due
Many thanks to all who participated in AMSAT's Straight Key Night on
OSCAR 2012. If you have not already done so, please take a moment to
nominate someone you worked for Best Fist. Remember, your nominee need
not have the best fist of those you heard, only of those you worked.
Send your nomination to w2rs@xxxxx.xxx.
This year's event is dedicated to the memory of Don Brown, W1JSM, who
passed away in 2011, aged 90. Don was a longtime, enthusiastic VHF/UHF
and satellite operator, and one of our most frequent Best Fist winners.
Those nominated will be recognized in an ANS bulletin in early Feb-
ruary, and in The AMSAT Journal.
[ANS thanks Ray Soifer, W2RS for the above information]
---------------------------------------------------------------------
University of Liege Students Provide Update on OUFTI-1 D-Star Cubesat
The OUFTI-1 Newsletter, published by students at the University of
Liege, Belgium reports they plan to have their D-Star transponder
cubesat launched toward the end of 2012. The satellite will have up-
links in the 145 MHz band and downlinks on 435.015 and 435.045 MHz.
Subsystem status reports are written up on the following:
+ The components of the Attitude Control System were ordered and re-
ceived. Two sets of one permanent magnet and four hysteretic rods
are waiting for integration of engineering and flight models.
+ The Electrical Power Supply subsystem has its main functionalities
implemented and tested. Some secondary functions, such as USB bat-
tery charger, are still to be implemented.
+ The antenna deployment mechanism subsystem was tested at Centre
Spatial de Liège (CSL) last June. The tests were performed under
vacuum at low (-60°C) and high (+60°C) temperatures. The tests
proved the correct functioning of the system but it was also no-
ticed that the deployment of the antennas could be blocked by a
remaining part of the retention wire. This problem is currently
being investigated in order to improve the design and guarantee
the deployment.
+ The Communication subsystem is complete. Regarding the radio-fre-
quency part (mainly amplifiers), some tests were performed on the
receiver circuit and showed that improvements were needed. The
transmitter circuit will be designed by Audric Hay (HELMO-Gramme).
He will also integrate and test the whole subsystem.
+ The On-Board Computer software was coded and tested. This year,
Alexei Dick (HEPL-INPRES) will develop a mode for pre-flight tests
of the satellite.
+ Thermal Analysis showed that the system could not keep batteries
above 0°C. The thermal control system was complemented with poly-
mer insulators. Testing in June at CSL demonstrated this new sol-
ution worked.
+ The vibrational behavior of OUFTI-1 during launch was studied
thanks to a detailed finite-element model. Gilles Bodson (HELMO-
Gramme) will keep this model up-to-date and perform tests on the
engineering model.
+ The Ground Station hardware is operational at the Montefiore Insti-
tute. The station is regularly used for satellite tracking. Alain
Collette (HELMO-Gramme) will develop the Mission Control Software.
The OUFTI-1 team is planning for a launch towards the end of 2012.
Opportunities have been identified and discussions are ongoing with a
launch provider.
[ANS thanks the OUFTI-1 Newsletter for the above information]
---------------------------------------------------------------------
More University Cubesat Projects Rolling Out
Japan: ITF-1 (YUI) CubeSat
--------------------------
Students at the University of Tsukuba are working on the ITF-1 (YUI)
CubeSat project that is planned to be launched on a H-IIA rocket in
2013. The orbit will be 400 km by 350 km with an inclination of 65
degrees.
The formal name ITF-1 comes from the initial letter of the university
slogan “Imagine The Futureö. The satellite also has a popular name YUI
which means “bondö in Japanese, it came from the project’s concept‚
“Creating the Worldwide Human Communityö.
The 435MHz satellite beacon will send telemetry by a Morse Code audio
tone on an FM transmitter running 300 milliwats output. It should be
possible to receive it using simple equipment such as a handheld
transceiver or scanner. Telemetry information will be first compressed
into binary data and then cut into 5 bits and converted into 10 – 15
Morse code messages.
Reception reports will be acknowledged with a certificate and the
telemetry will be made available on the web.
The UTF-1 Project Manager is Ayano Okamura and you can read her blog:
http://tinyurl.com/ITF-1-ProjectManagerBlog
The Chief Tech blog by Asai Eisuke is at:
http://tinyurl.com/ITF-1-TechBlog
ITF-1 website in Google English http://tinyurl.com/CubeSat-ITF-1
AMSAT-UK posted this news at: http://www.uk.amsat.org/3809
Spain: Xatcobeo
---------------
Students at the University of Vigo in Spain have built Xatcobeo a
CubeSat that carries a Software Defined Radio (SDR) and a solar panel
deployment mechanism. A launch on an ESA Vega rocket in February is
planned.
The IARU Amateur Satellite Coordination Panel pages report that it
carries three payloads:
+ SRAD: a Software Defined Radio. The aim is to test under space
conditions a reconfigurable radio. Different modulation schemes
will be selected depending on the link conditions.
+ RDS: an ionizing radiation dosimeter. This dosimeter will take
measurements of ionizing radiation in a typical LEO orbit for
amateur satellites, thus increasing our knwoledge about radiation
conditions in this environment.
+ PDM: a solar panel deployment mechanism to be tested in-flight.
Xatcobeo plans to use FFSK with AX.25 on UHF. These frequencies have
been coordinated – Simplex 437.365 MHz and SSR downlink on 145.940 MHz.
Further info available at http://www.xatcobeo.com/ and a video at:
http://www.youtube.com/watch?feature=player_embedded&v=iMUmLhA7ioE
Pakistan: ICUBE-1 CubeSat
-------------------------
Students at the Institute of Space Technology (IST) built Pakistan’s
first CubeSat ICUBE-1. Like a number of new CubeSats its communica-
tions subsystem is capable of acting as an “AO-16 modeö FM to DSB
transponder.
The IARU amateur satellite frequency coordination panel pages say that
the VHF downlink will operate as a 1k2 BPSK beacon but has the
capability of being configured as an FM-DSB transponder. A downlink on
145.947 MHz and an uplink on 435.060 MHz have been coordinated.
It is planned to have an imaging payload with a small low resolution
CMOS sensor. The camera will be mounted on the Z+ face of the ICUBE and
can take continental scale images.
ICUBE-1 is scheduled to be launched by Interorbital Systems.
ICUBE http://www.icube.org.pk/
Student Satellite Project http://www.ist.edu.pk/student_satellite.html
Institute of Space Technology (IST) http://www.ist.edu.pk/
[ANS thanks the student cubesat teams and AMSAT-UK for the above
information]
---------------------------------------------------------------------
NASA Launches STEM connector Website
The new STEMconnector website launched on Nov. 30, 2011. This new
website serves as a national gateway to "who is doing what" in sci-
ence, technology, engineering and mathematics, or STEM.
STEMConnector is a nationwide collaboration of companies, nonprofit
associations and professional societies, STEM-related research and
policy organizations, and academic institutions concerned about the
plight of STEM education in the United States.
STEMConnector is designed to link "all things STEM" by constructing a
comprehensive website that provides connections to national, state and
local STEM entities and their own content through a variety of search
tools.
Visit the new site to find state-by-state information, a blog, events
and resources related to STEM: http://www.stemconnector.org/
[ANS thanks NASA Education Express for the above information]
---------------------------------------------------------------------
Satellite Shorts From All Over
+ Bob McGwier N4HY has made available an extensive collection of
amateur radio satellite pictures available for download. The
pictures range from the early 1960?s with OSCAR’s 1, 2, 3, etc.
to the more recent Eagle and SuitSat:
http://n4hy.smugmug.com/AMSAT
+ AMSAT Director of Awards, Bruce Paige, KK5DO wrote, "If you remem-
ber the photos a few weeks ago KC9ROI braving the cold to work
ARISSat-1, I thought that was pretty neat and I had to get a Sate-
llite Communicators Club Certificate to him and what better way
than at one of his club meetings. I sent the certificate out the
next day for a meeting they had Saturday, January 14. They framed
the certificate and presented it to him." Photos posted on the
club website, see: http://www.n9xh.org/
+ The 15th Annual Southeastern VHF Society Conference to be held in
Charlotte, NC. on April 20-21, 2012. Papers and presentations are
solicited on both the technical and operational aspects of VHF,
UHF and Microwave weak signal amateur radio. The deadline for the
submission of papers and presentations is February 17, 2012. The
technical program is being handled by Robin Midgett, K4IDC. Send
all questions & comments to Robin via: K4IDC at comcast dot net.
Also refer to SEVHFS web pages at: http://www.svhfs.org/
+ VE7DAO/VA7ISS posted a video recorded during the final days of
ARISSat-1/KEDR:
http://ve7dao.blogspot.com/2012/01/listening-to-arissat-1-with-arrow.htm
l
+ The FUNcube amateur radio satellite project is featured on the
website of Electronics Weekly: http://tinyurl.com/6twqvny
+ A visualization of the launch and deployment of 50 Cubesats in
the QB50 project can be seen at:
http://www.youtube.com/watch?v=wds7nKVhjs4
+ The European Southern Observatory posted a video of a zoom
sequence beginning at Earth, past the stars in our galaxy, and
on to the center of the Milky Way galaxy in the constellation of
Sagittarius: http://www.youtube.com/watch?v=XhHUNvEKUY8
+ Clint Bradford, K6LCS has been granted permission to reprint the
QST article, "A 2 meter and 70 cm Portable Tape Measure Beam" by
John Portune, W6NBC:
http://www.work-sat.com/Work-Sat/Antennas_files/W6NBC-Beam.pdf
Clint also has permission to reprint, "QRP to the ISS" by Doug
Cook, KD5PDN, which appeared in the February, 2012 issue of QST.
Doug walks the reader through building a simple tape measure beam,
and how to successfully work the ISS with it and a handheld radio:
http://www.work-sat.com/Work-Sat/Sat_Skeds_files/QRP-ISS_2.pdf
+ Congratulations to Ted, K7TRK on receiving VUCC Award #226. Ted
commented, "My thanks to all who contributed with contacts and
cards. Most of the blame goes to John, K8YSE, who got me started
on the venture and to Loren, K7CWQ for continuing encouragement
and advice."
+ A video by Doug Cook, KD5PDN, showing how to set up a Yaesu VX-8R
for ISS APRS packet data sending and receiving and other aspects
to make a digital contact with the International Space Station
can be viewed at:
http://www.youtube.com/watch?feature=player_embedded&v=HdS3EqRooN8
---------------------------------------------------------------------
Winners in the ARISSat-1/KEDR Chicken Little Contest.
The Chicken Little Contest received 77 entries from 17 different
countries, and all continents except Antarctica. Based on comments
sent along with the submissions, a wide variety of techniques were
used. These ranged from detailed calculations, to comparisons with
past satellites, to guesses based on birthdays.
The winners in each category are:
+ Kindergarten through grade 8: Cora Haefner, KK4ECV,
Fort A.P. Hill, VA, USA
+ High School, grades 9 through 12: Cameron, Lancashire, UK
+ Adult: Thomas Frey, HB9SKA, Birr, Switzerland
Cora, KK4ECV and Thomas, HB9SKA were both within 15 hours of the
best data we have from Space Track: approximately 0700 on
4 January 2012, in the South Atlantic.
All three winners have received an appropriate Chicken Little
Certificate, and the congratulations of the ARISSat-1/KEDR Team.
Thanks go to all those who entered, and especially educators
who worked with students.
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
Winners of the ARISSat-1/KEDR Grab the Last Telemetry Contest.
Thanks to the dedication of stations around the world, a nearly
steady stream of digital telemetry reports were received in the
final days from ARISSat-1/KEDR:
31 Dec -- 1125
01 Jan -- 1537
02 Jan -- 1541
03 Jan -- 1048
04 Jan -- 107
Many other reports were received from stations copying the voice,
SSTV, and telemetry transmissions, as well as some contacts through
the transponder.
The final digital data received was copied by both JA8TCH, Mori
Seiji, Sapporo City, Japan, and JA0CAW, Tetsurou Satou, Niigata
City, Japan. It was received at 06:02:14, 4 January, 2012, less
than an hour before the estimated point of loss in the South At-
lantic. Their data, combined with the submissions of many others,
constitutes the most comprehensive coverage of the reentry of any
amateur satellite. JA8TCH and JA0CAW will receive a certificate
for their achievement. They and all who submitted telemetry through-
out the ARISSat-1/KEDR mission have the thanks of the entire team.
[ANS thanks the Alan Biddle, WA4SCA and the ARISSat-1/KEDR Team
for the above information]
---------------------------------------------------------------------
Amateur Radio on the International Space Station (ARISS) Status Report
January 16, 2012
1. Upcoming School Contact
Vrije Technische Scholen (VTS), located in Sint-Niklaas, Belgium has
completed (ARISS) contact on Wednesday, January 18 at 09:47 UTC. VTS is
a technical and professional secondary school for students ages 12 - 18.
Lesson plans associated with this contact have been adapted for the
different age and skill levels of the students and cover electricity,
mechanics, antennas and space.
2. Burbank Participates in ARISS Contact with Descartes High School
Descartes High School in Montigny-Le-Bretonneux, France participated in
an Amateur Radio on the International Space Station (ARISS) contact with
Dan Burbank, KC5ZSX on Monday, January 9. Burbank talked about how
astronauts from different cultures get along on the ISS and fielded
questions about the various experiments performed onboard the Space
Station. About three hundred students and visitors were present for the
event, including Astronaut Leopold Eyharts who exchanged greetings with
Burbank. Presentations were given before the contact and a Question and
Answer session followed. The ARISS contact was a featured activity for
students who have been studying life and work on the ISS and through
collaboration with the town’s amateur radio club, have also been
learning about radio and wireless technology. NASA has posted video of
the event on its Web site. See:
http://www.nasa.gov/multimedia/videogallery/index.html?media_id=12848350
1
3. Belgian Students Radio Andre Kuipers
On Friday, January 13, an Amateur Radio on the International Space
Station (ARISS) contact was held between students from Atheneum Borgloon
in Belgium and Astronaut Andre Kuipers, PI9ISS on the ISS. The radio
connection was provided by telebridge station K6DUE in Greenbelt,
Maryland. The ARISS event highlighted a science curriculum covering the
history of space travel, the solar system and the ISS. Other activities
included space workshops and a field trip to the Eurospace Center in
Transinne. Approximately 100 people tied into the contact through
streaming video on the internet.
4. ARISS Contact Article in Canadian Magazine
The January/February 2012 issue of the Canadian Amateur Magazine (TCA)
has a great article on an ARISS contact held in Thetford Mines, Québec
on November 14, 2011. The contact was arranged by a fourteen year old at
the school. The story, written by ARISS Delegate Maurice-André
Vigneault, VE3VIG, is titled, “Quebec Youth Masters ISS Contact.ö A
photo and the table of contents may be viewed at:
http://www.rac.ca/tca/
5. KPARC ARISS Presentation
ARISS volunteer Dave Jordan, AA4KN gave a talk on the ARISS program
during the Sun City, Florida Kings Point Amateur Radio Club (KPARC)
monthly meeting on January 9. His presentation covered basic operations
of the ARISS organization, a brief history of ARISS beginning with SAREX
and a section discussing the ARISSat-1 mission during which he showed
released photos and others that illustrated the assembly, testing and
general development efforts that took place in the Orlando lab. In
concluding his talk, Jordan suggested that the club members form a group
to meet with local schools and encourage them to submit proposals for
future ARISS contacts. Some photos from the presentation are available
here: http://www.kparc.org/archive/aa4kn.htm
6. Astronaut Training Status
Astronaut Alexander Gerst is interested in earning his amateur radio
license and will be participating in training sessions in February. He
is scheduled to fly with Expedition 40 in May 2014.
[ANS thanks Carol, KB3LKI, for the above information]
In addition to regular membership, AMSAT offers membership in the
President's Club. Members of the President's Club, as sustaining donors
to AMSAT Project Funds, will be eligible to receive additional benefits.
Application forms are available from the AMSAT Office.
73,
This week's ANS Editor,
Dee Interdonato, NB2F
Nb2f at amsat dot org
------------------------------
_______________________________________________
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 7, Issue 39
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