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CX2SA > SATDIG 12.12.10 13:40l 1000 Lines 35064 Bytes #999 (0) @ WW
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To : SATDIG@WW
Today's Topics:
1. Re: Sat timing (Roger Kolakowski)
2. Anyone from Europe received QSL from OX/N0RC pedition?
(Mika Siira)
3. ANS-346 AMSAT News Service Weekly Bulletins (JoAnne Maenpaa)
4. Re: Anyone from Europe received QSL from OX/N0RC pedition?
(Reid Crowe)
5. Re: LF Satellite ideas? (John Magliacane)
6. Update On Akatsuki (B J)
7. Re: LF Satellite ideas? (Bob Bruninga )
8. Press Coverage of AMSAT-UK FUNcube (Trevor .)
9. Re: LF Satellite ideas? (G0MRF@xxx.xxxx
10. Re: LF Satellite ideas? (GRAHAM SHIRVILLE)
11. Re: LF Satellite ideas? (Jeff Yanko)
12. Re: LF Satellite ideas? (Matthias Bopp)
----------------------------------------------------------------------
Message: 1
Date: Sat, 11 Dec 2010 15:40:36 -0500
From: Roger Kolakowski <Rogerkola@xxx.xxx>
Subject: [amsat-bb] Re: Sat timing
To: Jack Barbera <barberaalderwood@xxxxx.xxx>
Cc: amsat-bb@xxxxx.xxx
Message-ID: <4D03E1C4.2080501@xxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Usually mismatching Keps...especially an odd number...but check your
computer time for the correct timezone...and the program's offset for same.
It is always possible you are 1 orbit off unless you are antenna
tracking...then it probably wouldn't be there at all...one orbit = about
1-1/2 hours...at least it's within 10 minutes of aos (maybe)
Roger
WA1KAT
On 12/11/2010 1:44 PM, Jack Barbera wrote:
> Need a little help as I have a problem with the timing between the count
down
> window and the Win Aos window. There is a discrepancy of about 20 minutes
with
> Win Aos running about 20 mins late. How do I correct this?
> Thanks
> Jack WA1ZDV
> _______________________________________________
> 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: 2
Date: Sat, 11 Dec 2010 22:33:45 +0100 (CET)
From: Mika Siira <oh8mbn@xxxxxxx.xx>
Subject: [amsat-bb] Anyone from Europe received QSL from OX/N0RC
pedition?
To: amsat-bb@xxxxx.xxx
Message-ID:
<16205030.60181292103225017.JavaMail.defaultUser@xxxxxxxxxxx>
Content-Type: text/plain;charset="ISO-8859-15"
Hi folks,
Just interested to know if any european sat operator who worked OX/N0RC
have received a QSL from him. I am asking
this because I have sent my card directly to him (SAE+greenstamp) over
five months ago and despite e-mail notification
still haven't got a card back.
Mika, OH8MBN
------------------------------
Message: 3
Date: Sat, 11 Dec 2010 19:20:10 -0600
From: "JoAnne Maenpaa" <k9jkm@xxxxxxx.xxx>
Subject: [amsat-bb] ANS-346 AMSAT News Service Weekly Bulletins
To: <amsat-bb@xxxxx.xxx>
Message-ID: <000701cb999a$b88f8d60$29aea820$@xxx>
Content-Type: text/plain; charset="us-ascii"
AMSAT NEWS SERVICE
ANS-346
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:
* ARISS Celebrates 10th Anniversary of Student Conversations with ISS
Astronauts
* SpaceX Falcon 9 Mission Successful - Deploys Cubesats
* December AO-51 Schedule Features VHF BBS Test, SKN, Dual SU Downlink
* AMSAT-UK FUNcube Documents On-Line
* Remembering Lost UNITEC-1 - Japan's Akatsuki Problem at Venus Encounter
* Writing Opportunities for Amateur Radio in Space
* Satellite Shorts From All Over
SB SAT @ AMSAT $ANS-346.01
ARISS Celebrates 10th Anniversary of Student Conversations with ISS
Astronauts
AMSAT News Service Bulletin 346.01
>From AMSAT HQ SILVER SPRING, MD.
December 12, 2010
To All RADIO AMATEURS
BID: $ANS-346.01
On 21 December 2000, astronaut William Shepherd turned from his usual
activities aboard the newly occupied International Space Station
(ISS). Floating over to a "ham" radio attached to a station bulkhead,
he called the Burbank School in Burbank, Illinois and was soon talking
with 14 enthusiastic students from grades 1-8. This month, amateur
radio operators world-wide celebrate the tenth anniversary of this
first school contact from ISS.
Since that first contact, Amateur Radio on the International Space
Station (ARISS) volunteers have conducted 565 successful contacts in
40 countries, allowing thousands of students to share the excitement
of those first 14. Moreover, tens of thousands of students, faculty,
and parents have participated by planning and attending these events.
ARISS contacts have prompted countless students to seriously consider
pursuing science, technology, engineering, and math (STEM) careers,
including becoming an astronaut. Educational programs and amateur
radio clubs established at participating schools continue to inspire
students long after the contact has ended.
The use of amateur radio in space began in 1983 aboard the Space
Shuttle Columbia. The Shuttle Amateur Radio Experiment (SAREX) flew on
28 shuttle missions, proving the educational and crew morale benefits
of ham radio. Ham radio also proved popular with the cosmonauts aboard
space station Mir. The value of amateur radio in space was so apparent
to NASA and the Russian Space Agency that the ARISS radio became the
first experiment to be activated on ISS.
ARISS is a volunteer program that inspires students the world over to
pursue STEM careers by providing amateur radio communications
opportunities with the International Space Station (ISS) on-orbit
crew. Students learn about life on board the ISS and explore Earth
from space through science and math activities. ARISS provides
opportunities for the school community (students, teachers, families,
and local residents) to become more aware of the substantial benefits
of human spaceflight and the exploration and discovery that occur on
spaceflight journeys while learning about technology and amateur radio.
ARISS is an international working group comprising delegations from 9
countries, including several countries in Europe as well as Japan,
Russia, Canada, and the USA. The organization is run by volunteers
from national amateur radio organizations and international AMSAT
(Radio Amateur Satellite Corporation) organizations in each member
country. ARISS team members in each country work with their respective
space agencies (ESA, NASA, JAXA, CSA, and the Russian Space Agency).
In the USA, ARISS works with the NASA Teaching From Space program.
[ANS thanks ARISS for the above information]
SB SAT @ AMSAT $ANS-346.02
SpaceX Falcon 9 Mission Successful - Deploys Cubesats
AMSAT News Service Bulletin 346.02
>From AMSAT HQ SILVER SPRING, MD.
December 12, 2010
To All RADIO AMATEURS
BID: $ANS-346.02
SpaceX launched the Dragon spacecraft from Florida on a two-orbit
test flight Wednesday, December 8 and the company brought the auto-
mated capsule back to Earth less than three-and-a-half hours later.
A video of the Falcon 9 liftoff can be viewed at:
http://www.youtube.com/watch?v=Xi9ljTW3GEQ
Liftoff photos from pad cameras can be viewed at:
http://spaceflightnow.com/falcon9/002/remotes/
SpaceFlightNow.com's Photo Gallery of the launch can be viwed at:
http://spaceflightnow.com/falcon9/002/press/
Photos of the Dragon parachute landing in the Pacific can be
viewed at: http://spaceflightnow.com/falcon9/002/splashdown/
During the flight four cubesats were deployed from the "trunk"
section of the Dragon spacecraft. At press time the function of
two of the cubesats have been identified.
The University of Southern California's (USC) CAERUS cubesat was
deployed SpaceX Falcon 9 rocket. CAERUS is part of the "MAYFLOWER"
Next Generation Technology CubeSat that is a joint effort with
Northrop Grumman NOVAWORKS group. CAERUS is licensed by the FCC
in the Experimental Service. It also has an amateur callsign and
a downlink in the 70cm band:
Call Sign: KJ6FIX
Downlink Frequency: 437.600 MHz (not coordinated by IARU)
Beacon Output Power: 900mW
Modulation Type: AFSK, 1200 baud
TLE: Updated on website, right after launch.
The CAERUS website is at: http://tinyurl.com/37w8map. The beacon
data can also be translated with the jar applet provided on this
website.
The second cubesat identifed aboard the Falcon X launch was the
US Army SMDC-ONE nanosatellite mission which is a store and for-
ward satellite. The primary objective of the first flight wass to
receive data from a ground transmitter and relay that data to a
ground station. The technology is planned to be expanded to build
a number of identical satellites and deploy them together into Low
Earth Orbit to simulate enhanced tactical communications capability.
[ANS thanks Omair A. Rahman at the University of Southern California,
SpaceDaily.com, and SpaceFlightNow.com for the above information]
SB SAT @ AMSAT $ANS-346.03
December AO-51 Schedule Features VHF BBS Test, SKN, Dual SU Downlink
AMSAT News Service Bulletin 346.03
>From AMSAT HQ SILVER SPRING, MD.
December 12, 2010
To All RADIO AMATEURS
BID: $ANS-346.03
AMSAT-NA VP Operations Drew KO4MA says the December 2010 AO-51 schedule
has been released. Some of the dates of mode changes may move a day or
so according to command station availability.
Note the 2m up BBS test beginning December 12. Beginning on December 17
a dual downlink of UHF and S-band will be available. AO-51 will feature
its CW up, FM down mode for Straight Key Night.
At the end of December we go back into eclipses for a LONG time, so the
overall power budget will shrink, and the command team will reinstate
the new PL mode, and the satellite will likely be off in eclipse.
December 12 (late UTC)
----------------------
FM Repeater, V/U
Uplink: 145.920 MHz FM (no PL tone)
Downlink: 435.300 MHz FM
9k6 Baud PBBS Operations, V/U
Uplink: 145.860 MHz FM at 9600 baud
Downlink: 435.150 MHz FM at 9600 baud
December 17 (late UTC)
----------------------
FM Repeater, V/SU
Uplink: 145.880 MHz FM (no PL tone)
Downlinks: 2401.200 MHz FM *and* 435.300 MHz FM (at low power!)
December 22 (late UTC)
----------------------
FM Repeater, V/U
Uplink: 145.920 MHz FM (no PL tone)
Downlink: 435.300 MHz FM
9k6 Baud PBBS Operations, L/U
Uplink: 1268.705 MHz FM at 9600 baud
Downlink: 435.150 MHz FM at 9600 baud
December 30 (late UTC)
----------------------
CW/FM Repeater, V/U For Straight Key Night
Uplink: 145.880 MHz CW
Downlink: 435.300 MHz CW over FM
9k6 Baud Telemetry
Downlink: 435.150 MHz FM at 9600 baud
As always, keep up with the latest AO-51 Control Team news at:
http://www.amsat.org/amsat-new/echo/CTNews.php
[ANS thanks Drew, KO4MA for the above information]
SB SAT @ AMSAT $ANS-346.04
AMSAT-UK FUNcube Documents On-Line
AMSAT News Service Bulletin 346.04
>From AMSAT HQ SILVER SPRING, MD.
December 12, 2010
To All RADIO AMATEURS
BID: $ANS-346.04
AMSAT-UK says they intend to publish as many of the working documents
as possible for their FUNcube satellite and the first two documents
are now available. The Mission Requirements Specification and the PA
Board Specification can be downloaded from:
http://funcube.org.uk/working-documents/
Pictures and videos from the recent FUNcube developers meeting
at Martlesham are at:
http://funcube.org.uk/working-meetings/cubesat-mtg-1314-nov-2010/
The UK Space Agency is proposing to use the AMSAT-UK FUNcube boards
as part of its innovative new CubeSat UKube-1 slated for launch in
December 2011.
The United Kingdom Space Agency website now includes some more details
of the UKube-1, a 3U CubeSat (10 * 10 * 30cm) project. See:
http://www.ukspaceagency.bis.gov.uk/20084.aspx
The baseline design for this satellite includes a set of FUNcube
boards to provide the educational outreach for the project. AMSAT-UK
are presently discussing the precise details of this arrangement with
the UKube-1 project team. This development will enable a much higher
level service to be provided for Science, Technology, Engineering and
Mathematics (STEM) outreach to schools than would be possible with
just a single spacecraft.
An information pack is provided by the UK Space Agency is at
http://www.ukspaceagency.bis.gov.uk/assets/ZIP/CubesatAOpayload.zip
BBC report on UKube: http://tinyurl.com/2w3rgyc (bbc.co.uk site)
FUNcube website
http://www.FUNcube.org.uk/
[ANS thanks Trevor, M5AKA, AMSAT-UK, and the SouthGate ARC News
for the above information]
SB SAT @ AMSAT $ANS-346.05
Remembering Lost UNITEC-1 - Japan's Akatsuki Problem at Venus Encounter
AMSAT News Service Bulletin 346.05
>From AMSAT HQ SILVER SPRING, MD.
December 12, 2010
To All RADIO AMATEURS
BID: $ANS-346.05
UniverseToday reported that Japan's first Venus space probe has arrived
at the planet but encountered problems while attempting orbit insertion
and went into safe mode. It took longer than expected (an hour and a
half) to regain communications after a known 22 minute blackout with the
Akatsuki spacecraft, and apparently controllers are still trying to
ascertain the spacecraft's orbit. They have regained some radio communi-
cations. Telemetry analysis confirmed the spacecraft was in safe mode.
The planned orbit for Akatsuki ranged between 300 and 80,000 kilometers
(186 to 49,600 miles), looking for signs of lightning and active volcan-
oes.
Once communications were restored JAXA was able to determine that the
probe's High Gain Antenna is working and telemetry from the spacecraft
is back to normal function as is full control and stabilization. AKATSUKI
is in a Sun circular orbit after not reaching Venus orbit.
Read the UniverseToday story at: http://tinyurl.com/2cfgw5p
and at: http://tinyurl.com/2vvl8yd (SpaceCoalition.com)
The May 21, 2010 Akatsuki launch also carried the UNITEC-1 amateur radio
satellite with the callsign of JQ1ZUN. Its 5840.000 MHz, 4.8W beacon was
initially copied from low earth orbit but the signal was lost days later.
UNITEC-1 would have become the world's first university satellite which
went beyond Lunar orbit.
[ANS thanks UniverseToday for the above information]
SB SAT @ AMSAT $ANS-346.06
Writing Opportunities for Amateur Radio in Space
AMSAT News Service Bulletin 346.06
>From AMSAT HQ SILVER SPRING, MD.
December 12, 2010
To All RADIO AMATEURS
BID: $ANS-346.06
IAA Conference on University Satellites Missions and Cubesats
-------------------------------------------------------------
The December 18 deadline for abstract submissions for the 1st IAA
Conference on University Satellites Missions and Cubesat Conference
is rapidly approaching. This conference will be held in Rome on
January 24-29, 2011. Early registration closes on January, 10th.
Those who register before this date will have a discount rate.
Full information is posted at: http://www.gaussteam.com under the
"Events" tab.
Call for papers for 2011 SA AMSAT Space Symposium
-------------------------------------------------
The 2011 SA AMSAT Space Symposium will be held in Gauteng on Saturday
26 March 2011 at Vodaworld in Midrand. This is the first call for pap-
ers. Authors are invited to submit a synopsis in a MSWord document not
exceeding 300 words. The synopsis should be mailed to:
saamsat@xxxxxxx.xx.xx (with Space Symposium 2011 in the subject line).
The theme of the conference is Innovation in Space Communication. Clos-
ing date for paper proposals and a synopsis is 20 January 2011. For more
details visit: http://www.amsatsa.org.za.
Call for Papers: 15th Annual SEVHF Society Conference
-----------------------------------------------------
The Southeastern VHF Society is calling for the submission of papers
and presentations for the upcoming 15th annual Southeastern VHF Soc-
iety Conference to be held in Huntsville, Alabama on April 29th and
30th, 2011. Papers and presentations are solicited on both the tech-
nical and operational aspects of VHF, UHF and Microwave weak signal
amateur radio.
Contact Steve Kostro, (e-mail: SVHFS2011 AT downeastmicrowave DOT com)
by January 8th, 2011 if you wish to make a presentation or submit your
paper. Deadline for the submission of papers is March 11, 2011. For
further information and updates about the conference please go to:
http://www.svhfs.org
Call for Papers: 45th Central States VHF Society Conference
-----------------------------------------------------------
The Central States VHF Society is hosting their 45th Conference
July 29-30, 2011 in Irving Texas. They are currently looking for
papers relating to amateur radio above 50 MHz. Anticipated topics
include: Design and build of VHF thru microwave equipment, VHF
DXPeditions, Antenna Design, Weak Signal Reception Techniques.
Deadline for papers is May 1, 2011. Papers should be sent to:
Kent Britain <wa5vjb@xxxxx.xxx>
[ANS thanks the IAA, SA AMSAT, and Robin Midgett K4IDC 2011 Conference
Program Co-Chair, SVHFS; Chuck Clark, AF8Z for the above information]
SB SAT @ AMSAT $ANS-346.07
Satellite Shorts From All Over
AMSAT News Service Bulletin 346.07
>From AMSAT HQ SILVER SPRING, MD.
December 12, 2010
To All RADIO AMATEURS
BID: $ANS-346.07
+ For those who collect archived publications here is a link to a
recently posted digitized copy of the 1985 1296/2304 MHz Conference
which has evolved into the Microwave Update MUD Conference. Thanks
to the work of Brian, WA1ZMS, these proceedings have been digitized
and can be downloaded in 7 sections from http://www.wa5vjb.com in
the Reference Section.
+ The AMSAT India newsletter is back after a long break and will be
published every month. A softcopy of the newsletter can be found at:
http://amsatindia.org/Newsletter/AMSATINDIA-News-Dec2010.pdf
Archives are at http://amsatindia.org/Newsletter/
(via Nitin, VU3TYG, Secretary, AMSAT India)
+ AMSAT-ZL's Fred Kennedy, ZL1BYP says the KiwiSAT team is in need of
a small quantity supply source of space quality thermally conductive
epoxy for KiwiSAT. They will need probably less than 10 grams total
over the last few months of KiwiSAT construction. Minimum order quan-
tities have been quoted as 100 tubes and this amount is not needed
nor can be afforded. Contact Fred at: fredk@xxxxx.xxx.xx if you can
help.
+ Henk, PA3GUO has posted a YouTube video (HD) that features the
O/OREOS satellite from launch to telemetry reception and decode,
including DK3WN's Softwar and Mission control upload:
http://www.youtube.com/watch?v=Qh6lH5vqw-Y
Henk also has a video of the 'bare' telemetry stream at:
http://www.youtube.com/watch?v=M4Ka-RVpEHU
O/OREOS audio recording: http://www.pa3guo.com/OOREOS_PA3GUO.mp3
FASTRAC/FAST1 audio recording: http://www.pa3guo.com/FAST1_PA3GUO.mp3
(Henk says you can use MixW with your MP3 your player to decode the
telemetry.)
+ Roland PY4ZBZ reports that Yuri UT1FG/MM, has been active at sea
from the vessel M/V "MOTTLER", on SO-50, FO-29 and HO68, in the
squares: GG85, GG54, GE06, FD37, FD29, FE82, FE81, FE20 and FE21,
from Rio de Janeiro to Chili via the Strait of Magellan.
+ UniverseToday.com declares, "What a view!" A photograph taken by
one of the astronauts on the International Space Station shows
several snow-covered volcanoes on Russia's Kamchatka Peninsula.
See: http://tinyurl.com/24ccnz4
+ The Nanosail-D nanosatellite may have failed to eject from FASTSAT.
NASA had planned to eject Nanosail-D from its cannister on December 6.
Initial telemetry indicated that ejection was successful. It also now
appears that the solar sail may not have unfurled. NASA continues to
investigate. The NanoSail-D amateur radio beacon will transmit a one-
half second data signal every 5 seconds on 437.270 MHz if it becomes
active. The satellite will operate primarily on battery power because
of the short duration of the mission.
+ The next crew arriving at the International Space Station on December 17
includes two radio amateurs: US astronaut Catherine Coleman, KC5ZTH, and
the European Space Agency's Paolo Nespoli, IZ0JPA.
[ANS thanks everyone 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. And with that
please keep in mind that upon receiving his invitation to his radio
club's Christmas Party the ham decided it was time to get spruced up.
73,
This week's ANS Editor,
JoAnne Maenpaa, K9JKM
K9JKM at amsat dot org
------------------------------
Message: 4
Date: Sat, 11 Dec 2010 19:34:58 -0600
From: Reid Crowe <reid.crowe@xxxxx.xxx>
Subject: [amsat-bb] Re: Anyone from Europe received QSL from OX/N0RC
pedition?
To: Mika Siira <oh8mbn@xxxxxxx.xx>, amsat-bb@xxxxx.xxx
Message-ID: <4D0426C2.70304@xxxxx.xxx>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Sorry Mika, things have been really hectic for me with moving and school
since I got back. I fully intend to get this issue resolved after I am
done with finals on Friday.
Again, sorry for the delay.
Reid, N0RC
On 12/11/2010 3:33 PM, Mika Siira wrote:
> Hi folks,
>
> Just interested to know if any european sat operator who worked OX/N0RC
> have received a QSL from him. I am asking
> this because I have sent my card directly to him (SAE+greenstamp) over
> five months ago and despite e-mail notification
> still haven't got a card back.
>
> Mika, OH8MBN
>
> _______________________________________________
> 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, 11 Dec 2010 18:13:24 -0800 (PST)
From: John Magliacane <kd2bd@xxxxx.xxx>
Subject: [amsat-bb] Re: LF Satellite ideas?
To: amsat-bb@xxxxx.xxx
Message-ID: <177703.37608.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
--- On Sat, 12/11/10, Bob Bruninga <bruninga@xxxx.xxx> wrote:
> Is 137 KHz possible from space?
Bob,
My understanding is that LF and VLF emissions of terrestrial origin don't
get beyond the 'D' layer, even at night. In fact, the 'D' layer acts as a
reflector, rather than an attenuator at these frequencies. Cosmic
background radiation maintains sufficient 'D' layer ionization at night.
However, your post reminded me of project INSPIRE, which was a plan to
transmit VLF signals from the Space Shuttle back in 1992 using a pulsed
electron gun in the payload bay. Details on project INSPIRE can be found
here:
http://theinspireproject.org/index.php?page=faq
I'm not sure how this would penetrate the ionosphere except through brute
force.
Nevertheless, compatible receivers are simple to build and readily available.
73, de John, KD2BD
--
Visit John on the Web at:
http://kd2bd.ham.org/
------------------------------
Message: 6
Date: Sat, 11 Dec 2010 18:43:28 -0800 (PST)
From: B J <top_gun_canada@xxxxx.xxx>
Subject: [amsat-bb] Update On Akatsuki
To: amsat-bb@xxxxx.xxx
Message-ID: <885769.39928.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=us-ascii
http://www.yomiuri.co.jp/dy/features/science/T101210005388.htm
http://www.planetary.org/blog/article/00002821/
http://www.isas.jaxa.jp/e/topics/2010/1210.shtml
73s
Bernhard VA6BMJ @ DO33FL
------------------------------
Message: 7
Date: Sat, 11 Dec 2010 18:37:24 -0500 (EST)
From: "Bob Bruninga " <bruninga@xxxx.xxx>
Subject: [amsat-bb] Re: LF Satellite ideas?
To: amsat-bb@xxxxx.xxx
Message-ID: <20101211183724.AGV59199@xxxxx.xxxx.xxx>
Content-Type: text/plain; charset=us-ascii
My initial 1100m long satllite antenna idea (with no knowledge of
propogation possibility through the ionosphere) is:
a) connect a product detector (SSB) receiver to the 1/2 wave 137 kHz
satellite antenna and downlink the audio that it hears on the UHF FM
downlink. Then anyone can hear the 137 KHz experimenters if the satellite
does. USA Hams cannot transmit on the 137 KHz band. But no licensing of the
LF uplink is needed since we are only "listening to an ionosphere
experiment"...
b) Connect a small CW transmitter on 137 KHz to the 1100m antenna and see if
the LOFERS can hear it? But there is no ITU/IARU amateur satellite
authorization there. But again, on-off keying of some electrons on a long
ionosphereic tether would be a physics experiement, not comms.
If such a link is possible, then people can transmit up on 145.825 MHz with
normal PACKET, and the satellite will convert the packet message to CW on
the 137 Khz downlink.
The #1 question is whether 137 KHz will pass anything through the
ionosphere? Maybe only straight up? I hoipe some real space-physics people
can contribut knowledge here.
Bob, WB4APR
>
> Is 137 KHz possible from space?
>
> Our next Cubesat will have a 1100 meter long
> antenna (think tether satellite). It will
> ultimatelly be an electrodynamic tether but the
> first one will have NO ACTIVE ELECTRONICS
> connected to the tether.
>
> So I have asked them to make it 1100m long instead
> of a generic 1km tether to try to make it resonant
> in an amateur band. THe path loss at 137 KHz is
> 60 dB LESS than it is at 2 meters, so it shouldn't
> take much to communicate with an 1100m long
> antenna.
>
> I'm sorry I didnt think of this sooner, but I need
> a real SCIENCE justification for this. Maybe LF
> that low will never punch through the ionosphere,
> or maybe it will be completely absorbed. Can give
> good science on this idea?
>
> Bob, WB4APR
>
>
------------------------------
Message: 8
Date: Sun, 12 Dec 2010 10:21:25 +0000 (GMT)
From: "Trevor ." <m5aka@xxxxx.xx.xx>
Subject: [amsat-bb] Press Coverage of AMSAT-UK FUNcube
To: amsat-bb@xxxxx.xxx
Message-ID: <213310.96447.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=utf-8
The December 10 edition of the UK Metro newspaper carried an article titled
'Celebrating great British science' which featured the AMSAT-UK FUNcube
satellite.
Read the article on page 25 of the Online edition of the Metro newspaper at
http://e-edition.metro.co.uk/2010/12/10/?p=25
Click on the PDF icon for a permanent copy of the page.
You can join the FUNcube Yahoo Group at
http://groups.yahoo.com/group/FUNcube/
FUNcube website
http://www.FUNcube.org.uk/
FUNcube SDR Dongle
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----
------------------------------
Message: 9
Date: Sun, 12 Dec 2010 04:44:21 EST
From: G0MRF@xxx.xxx
Subject: [amsat-bb] Re: LF Satellite ideas?
To: amsat-bb@xxxxx.xxx
Message-ID: <cacaa.3016ca6d.3a35f375@xxx.xxx>
Content-Type: text/plain; charset="US-ASCII"
In a message dated 12/12/2010 03:18:49 GMT Standard Time, bruninga@xxxx.xxx
writes:
b) Connect a small CW transmitter on 137 KHz to the 1100m antenna and see
if the LOFERS can hear it? But there is no ITU/IARU amateur satellite
authorization there. But again, on-off keying of some electrons on a long
ionosphereic tether would be a physics experiement, not comms.
Sorry, no allocation at 137kHz. slippery slope, don't go there.
How about a simple SDR receiver that feeds into the tlm?
David G0MRF
------------------------------
Message: 10
Date: Sun, 12 Dec 2010 08:52:26 +0000 (GMT)
From: GRAHAM SHIRVILLE <g.shirville@xxxxxxxxxx.xxx>
Subject: [amsat-bb] Re: LF Satellite ideas?
To: amsat-bb@xxxxx.xxxx John Magliacane <kd2bd@xxxxx.xxx>
Message-ID: <922439.61000.qm@xxxxxxxx.xxxx.xxx.xxxxx.xxx>
Content-Type: text/plain; charset=iso-8859-1
Hi Bob,
If the ionosphere screens all the terrestrial signals at that height then
maybe your 136kHz RX could be used to listen to radiation received from
outer space at that frequency which normally we cannot listen to on earth.
Sound like?fundamental?research to me but maybe it has?already?been done and
redone.
73
GrahamG3VZV
--- On Sun, 12/12/10, John Magliacane <kd2bd@xxxxx.xxx> wrote:
From: John Magliacane <kd2bd@xxxxx.xxx>
Subject: [amsat-bb] Re: LF Satellite ideas?
To: amsat-bb@xxxxx.xxx
Date: Sunday, 12 December, 2010, 2:13
--- On Sat, 12/11/10, Bob Bruninga <bruninga@xxxx.xxx> wrote:
> Is 137 KHz possible from space?
Bob,
My understanding is that LF and VLF emissions of terrestrial origin don't
get beyond the 'D' layer, even at night.? In fact, the 'D' layer acts as a
reflector, rather than an attenuator at these frequencies.? Cosmic
background radiation maintains sufficient 'D' layer ionization at night.
However, your post reminded me of project INSPIRE, which was a plan to
transmit VLF signals from the Space Shuttle back in 1992 using a pulsed
electron gun in the payload bay.? Details on project INSPIRE can be found
here:
? ? ? ? ? http://theinspireproject.org/index.php?page=faq
I'm not sure how this would penetrate the ionosphere except through brute
force.
Nevertheless, compatible receivers are simple to build and readily available.
73, de John, KD2BD
--
Visit John on the Web at:
??? http://kd2bd.ham.org/
? ? ?
_______________________________________________
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------------------------------
Message: 11
Date: Sun, 12 Dec 2010 03:26:12 -0800
From: "Jeff Yanko" <wb3jfs@xxx.xxx>
Subject: [amsat-bb] Re: LF Satellite ideas?
To: "Bob Bruninga " <bruninga@xxxx.xxx>, <amsat-bb@xxxxx.xxx>
Message-ID: <459355906D7144B7B43C2FC131F9D393@xxxxxxxx>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original
Hi all,
A 1100 meter long antenna attached to a satellite moving through a very thin
atmosphere would be interesting. My concern would be the static build up of
energy on the antenna leading back to the satellite. I would think it this
would fry any circuitry in the satellite. If I recall correctly didn't one
of the shuttle mission have a problem of static build up on along tether and
had to give up on the experiment?
73,
Jeff WB3JFS
----- Original Message -----
From: "Bob Bruninga " <bruninga@xxxx.xxx>
To: <amsat-bb@xxxxx.xxx>
Sent: Saturday, December 11, 2010 11:13 AM
Subject: [amsat-bb] LF Satellite ideas?
> Is 137 KHz possible from space?
>
> Our next Cubesat will have a 1100 meter long antenna (think tether
> satellite). It will ultimatelly be an electrodynamic tether but the first
> one will have NO ACTIVE ELECTRONICS connected to the tether.
>
> So I have asked them to make it 1100m long instead of a generic 1km tether
> to try to make it resonant in an amateur band. THe path loss at 137 KHz
> is 60 dB LESS than it is at 2 meters, so it shouldn't take much to
> communicate with an 1100m long antenna.
>
> I'm sorry I didnt think of this sooner, but I need a real SCIENCE
> justification for this. Maybe LF that low will never punch through the
> ionosphere, or maybe it will be completely absorbed. Can give good
> science on this idea?
>
> Bob, WB4APR
>
> _______________________________________________
> 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: Sun, 12 Dec 2010 12:29:50 +0100
From: "Matthias Bopp" <matthias.bopp@xxx.xx>
Subject: [amsat-bb] Re: LF Satellite ideas?
To: "'GRAHAM SHIRVILLE'" <g.shirville@xxxxxxxxxx.xxx>,
<amsat-bb@xxxxx.xxx>
Message-ID: <EDF45A961C8947189D46580D1DE30BA6@xxxxxxxxxxxxxx>
Content-Type: text/plain; charset="iso-8859-1"
Hi Grahma,
I like your idea ... to receive signals at VLF which cannot be heard on the
ground and convert them to a frequency band which we can receive ... I guess
this will allow us to receive some "sounds from space" which we are
otherwise blocked from ...
Best regards
Matthias
www.dd1us.de
-----Urspr?ngliche Nachricht-----
Von: amsat-bb-bounces@xxxxx.xxx [mailto:amsat-bb-bounces@xxxxx.xxxx Im
Auftrag von GRAHAM SHIRVILLE
Gesendet: Sonntag, 12. Dezember 2010 09:52
An: amsat-bb@xxxxx.xxxx John Magliacane
Betreff: [amsat-bb] Re: LF Satellite ideas?
Hi Bob,
If the ionosphere screens all the terrestrial signals at that height then
maybe your 136kHz RX could be used to listen to radiation received from
outer space at that frequency which normally we cannot listen to on earth.
Sound like?fundamental?research to me but maybe it has?already?been done and
redone.
73
GrahamG3VZV
--- On Sun, 12/12/10, John Magliacane <kd2bd@xxxxx.xxx> wrote:
From: John Magliacane <kd2bd@xxxxx.xxx>
Subject: [amsat-bb] Re: LF Satellite ideas?
To: amsat-bb@xxxxx.xxx
Date: Sunday, 12 December, 2010, 2:13
--- On Sat, 12/11/10, Bob Bruninga <bruninga@xxxx.xxx> wrote:
> Is 137 KHz possible from space?
Bob,
My understanding is that LF and VLF emissions of terrestrial origin don't
get beyond the 'D' layer, even at night.? In fact, the 'D' layer acts as a
reflector, rather than an attenuator at these frequencies.? Cosmic
background radiation maintains sufficient 'D' layer ionization at night.
However, your post reminded me of project INSPIRE, which was a plan to
transmit VLF signals from the Space Shuttle back in 1992 using a pulsed
electron gun in the payload bay.? Details on project INSPIRE can be found
here:
? ? ? ? ? http://theinspireproject.org/index.php?page=faq
I'm not sure how this would penetrate the ionosphere except through brute
force.
Nevertheless, compatible receivers are simple to build and readily
available.
73, de John, KD2BD
--
Visit John on the Web at:
??? http://kd2bd.ham.org/
? ? ?
_______________________________________________
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
------------------------------
_______________________________________________
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 5, Issue 488
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