[jamsat-news:3426] [ans] ANS-078 AMSAT News Service Weekly Bulletins

Joe Spier wao @ vfr.net
2017年 3月 19日 (日) 16:08:48 JST

The AMSAT News Service bulletins are a free, weekly news and infor-
mation service of AMSAT North America, The Radio Amateur Satellite
Corporation. ANS publishes news related to Amateur Radio in Space
including 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

The news feed on http://www.amsat.org publishes news of Amateur
Radio in Space as soon as our volunteers can post it.

Please send any amateur satellite news or reports to:
ans-editor at amsat.org.

In this edition:

* AMSAT Ground Terminal Weekly Report for March 7, 2017
* AMSAT SA to Sponsor SDR Workshop in Cape Town
* CAS-4A and CAS-4B Linear Transponder Frequencies Announced
* IARU Page Proposed South Korean Satellite
* ARISS Closer to Launching New Radio System
* AMSAT Awards Update
* 6E3MAYA on Satellites March 18-21
* AMSAT Events
* ARISS News
* Satellite Shorts from All Over

SB SAT @ AMSAT $ANS-078.01
ANS-078 AMSAT News Service Weekly Bulletins

AMSAT News Service Bulletin 078.01
DATE March 19, 2017
BID: $ANS-078.01


AMSAT Ground Terminal Weekly Report for March 7, 2017

We kick off this week’s report with two demonstrations of DVB-S2 
transmission from the LimeSDR. The first from Charles Brain G4GUO, and 
the second from Paul KB5MU and Michelle W5NYV. Charles has live video 
and Paul and Michelle are transmitting a pre-recorded work of art called 
Adventure Time.

Mike Seguin N1JEZ has some LimeSDR spectral analysis to report.
First, 850 MHz Phase Noise 10 kHz offset 1 kHz resolution bandwidth
-58.36 – 10LOGBW = -88.36 dBc/Hz
If I read the LMS7002M Spec sheet right, it should be down around -96 
dBc/Hz? PDF is in the Phase 4 Ground Github link is in the show notes.
Second, 2850 MHz Phase Noise 10 kHz offset 1 kHz resolution bandwidth
-49 – 10LOGBW = -79 dBc/Hz spec around -87 dBc/Hz?
Third image is at 2850 MHz ±200 kHz
Check out those curious 200 kHz spurs
Fourth image is 2850 MHz 100 MHz Span
A broader view – we need to go digging deeper.
Final image is 2850 MHz 388 kHz spur
small spur on the low side?
Output power varies. He’s seen upwards of +15 dBm. He is powering the 
LimeSDR board off an external supply.
He is using LimeSuite to set up the transmit output on TX1-1. There are 
so many settings it’s possible/probable we’re missing something.

He has also have done rudimentary noise figure measurements. Paul, W1GHZ 
loaned him a homebrew noise head he had built from his QEX article in 
1996? on Noise Figure. He used it to measure the NF, but had to rely on 
a chart for ENR. So assumptions!!! He found he definitely had to use a 
preamp in front of the Lime. He used an AD6IW wideband pre for testing.

“I need to do more real world tests on the bands….” -Mike Seguin

In the next segment of this report Paul described how to use the 
examples folder in GNU Radio to get to the DVB flowgraphs we’ve been 
using for experiments.

Charles G4GUO shares his plan for next steps for DVB-S2 receive. He is 
looking at how to do the front end that finds the start of a frame and 
compensates for frequency error. He is pondering how to do this and has 
some ideas. He also has the low density parity check (LDPC) decoder to 
do but has not yet planned it out. He has the BCH decoder done and the 
bit that decodes the preamble code FEC.

Charles explains that the whole of DVB-S2 has been designed for the 
parallel processing powers of ASICs/FPGAs/GPUs. He has decided to attack 
the problem using GPUs.

He asserts that GPUs don’t have such a steep learning curve as some of 
the other technologies. He believes that the symbol tracking and root 
raised cosine filtering is best done in the FPGA on the LimeSDR. His 
thoughts are to re-write some of the Lime code so he can alter the ADC 
sample rate in fractions of a symbol. Then use the host to calculate the 
timing error and send the correction to the Lime FPGA code. The Lime can 
also do fine frequency error correction using a complex mixer. The error 
can be calculated in the host from the phase change in the preamble 

The central question is how to fit it into the memory model of the GPU 
to keep all the threads fully occupied. This means properly balancing 
the combination of LDPC decoding, parallel thinking and NVIDIA GPU 
programming. One of the many questions he has is how to cope with the 
final XOR of the parity bit for each block as that makes every bit in 
the whole thing dependent on every other bit. He believes that there 
must be a short cut so you can break the problem at the receiver down 
into a load of independent blocks (divide and conquer).

It is all very DVBS2 specific but when a sub block of the code meets a 
condition where all its parity check equation are correct it can be 
marked as finished and the decoder can then move on to the next sub 
block. It requires a lot of thinking about and Charles welcomes your 

So! Lots of programming! We are here to help with this effort! It’s 
going to be a big one.

Please join AMSAT, TAPR, ARRL, and any other local or regional club that 
is helping advance the state of the art in amateur radio. Projects like 
ours cannot exist without your membership.


[ANS thanks Michelle Thompson, W5NYV and the AMSAT Ground Terminal Team 
for the above information]


AMSAT SA to Sponsor SDR Workshop in Cape Town

SDR workshop in Cape Town on 22 April. Following on a very successful 
symposium on Software Defined Radio held in Gauteng towards the end of 
last year, a similar event will be presented by AMSAT SA in the Cape on 
Saturday 22 April 2017 at the Bellville Campus of the Cape Peninsula 
University of Technology. To register visit

[ANS thanks the South African Radio League News for the above information]


CAS-4A and CAS-4B Linear Transponder Frequencies Announced

CAMSAT has worked closely with a Beijing Government aerospace contractor 
to build two satellites with amateur radio linear transponder payloads. 
IARU record a launch had been planned for March 31, 2017 from Taiyuan 
into a 524 km orbit with an inclination of 42 degrees.

Both will carry a 435/145 (U/V) 20 dBm (100 milliwatt) SSB/CW linear 
transponder, a 2m CW 17 dBm (50 mW) telemetry beacon and an AX.25 4.8 
kbps GMSK 20 dBm (100 mW) telemetry downlink.

The two micro-satellites will also carry optical remote sensing 
missions. Planned to be 494x499x630 mm dimension regular square shape 
and approximately 50 kg mass with three-axis stabilization system.

These frequencies have been coordinated by the IARU Satellite Frequency 
Coordination Panel:

• Linear transponder downlink 145.870 MHz, emission designator 
20K0V8WWF, output power 20 dBm
• Linear transponder uplink 435.220 MHz
• CW telemetry beacon 145.855 MHz, emission designator 100HA1AAN, output 
power 17 dBm
• GMSK telemetry 145.835 MHz, emission designator 16K0F1DCN, output 
power 20 dBm

• Linear transponder downlink 145.925 MHz, emission designator 
20K0V8WWF, output power 20 dBm
• Linear transponder uplink 435.280 MHz
• CW telemetry beacon 145.910 MHz, emission designator 100HA1AAN, output 
power 17 dBm
• GMSK telemetry 145.890 MHz, emission designator 16K0F1DCN, output 
power 20 dBm

[ANS thanks AMSAT-UK and Trevor, M5AKA for the above information]


IARU Page Shows Proposed South Korean Satellite K2SAT

The Republic of Korea Air Force Academy has applied to the IARU for 
coordination of its' K2SAT satellite frequencies.

Headline Details:
A 3U CubeSat. The missions of the K2SAT are to demonstrate satellite 
imaging and transfer, and secondly to test voice repeating capability.

The payloads:
1. On-board camera 2. On-board voice repeater. Attitude control will be 
performed with 3-axis reaction wheels and magnetorquer. The satellite 
surface that contains the main payload(Camera) shall be aligned to the 
nadir direction of the satellite. Requesting coordination for a V/U 
transponder. The TX would also be capable of downlinking AX25 telemetry 
at 9k6 using BPSK. Planning a 2018 launch into a 500 or 600km SSO.

[ANS thanks the IARU Page for the above information]


ARISS Closer to Launching New Radio System

March 13, 2017:   The ARISS team took a giant step closer to flying the 
new ARISS Interoperable Radio System to the International Space Station, 
having met a major milestone.  Lou McFadin, W5DID, and Kerry Banke, 
N6IZW, travelled to the NASA Johnson Space Center (JSC) in Houston, 
Texas, in mid-February for preliminary testing of Banke's breadboard 
version of the ARISS Multi-voltage Power Supply. The two worked 
alongside JSC engineers and JSC EMC lab personnel, putting the specially 
built power supply through its paces, checking against US and Russian 
space specifications for Power Quality and Electromagnetic Compatibility 
(EMC) preliminary tests.

The result:  Outstanding news-the ARISS Team can move on to the next 
step, fabrication of prototype and flight units.  The JSC engineers 
disclosed that the ARISS breadboard power supply was the first hardware 
to have passed all of the space agencies' tests! They said the very 
professional ARISS Team certainly knew hardware development and design.

ARISS-International Chair Frank Bauer thanked Banke and McFadin for the 
multiple days spent putting the unit through the serious battery of NASA 
and Russian preliminary electrical tests.  Banke expressed pleasure with 
the results: "I was looking to come away with what we needed to move 
forward. We achieved that."  He was impressed with the support he and 
McFadin received from the testing group, and said key players on those 
teams who are also ham radio operators, commented that they find 
equipment brought in that is supported by ham radio operators, to earn 
particularly good marks.  McFadin asserted that the Multi-voltage Power 
Supply's fine test results are due to ARISS's team working very well 
together and being very experienced.

The completed testing of the breadboard unit means McFadin can now 
purchase expensive space-certified parts so the final prototype/flight 
power supplies can be fabricated.  He and Banke now know that when the 
final, even more rigorous tests are done, the units will pass with 
flying colors.

Watch for more news stories on the hardware and the fundraising campaign 
to help support the costs associated with designing, building, and 
testing the new ARISS radio system-the Kenwood D710GA and Multi-voltage 
Power Supply. Those wishing to contribute toward the final fabrication 
and flight tests are highly appreciated and asked to go to the AMSAT 
website,  www.amsat.org, to click on the "ARISS Donate" button.  Or 
visit the donation page on the ARISS website, 
http://www.ariss.org/donate.html. Contributions are tax deductible. 
Those who contribute $100 or more will receive the handsome ARISS 
Challenge Coin.  If you or your ham club or place of employment wish to 
make a highly substantial contribution, contact Frank Bauer, KA3HDO, at 
ka3hdo @ verizon.net.


Amateur Radio on the International Space Station (ARISS) is a 
cooperative venture of international amateur radio societies and the 
space agencies that support the International Space Station (ISS). In 
the United States, sponsors are the Radio Amateur Satellite Corporation 
(AMSAT), the American Radio Relay League (ARRL), the Center for the 
Advancement of Science in Space (CASIS) and  National Aeronautics and 
Space Administration (NASA).  The primary goal of ARISS is to promote 
exploration of science, technology, engineering, and mathematics (STEM) 
topics by organizing scheduled contacts via amateur radio between crew 
members aboard the ISS and students in classrooms or informal education 
venues.  With the help of experienced amateur radio volunteers, ISS 
crews speak directly with large audiences in a variety of public 
forums.  Before and during these radio contacts, students, teachers, 
parents, and communities learn about space, space technologies, and 
amateur radio.  For more
information, see www.ariss.org, www.amsat.org, and www.arrl.org.

Also, join us on Facebook:  Amateur Radio on the International Space 
Station (ARISS) / Follow us on Twitter:  ARISS_status

[ANS thanks David Jordan, AA4KN for the above information]


AMSAT Awards Update

This is the first posting of awards for 2017. The year started slow and 
then picked up with the following earning their awards.

AMSAT Satellite Communicators Award for making their first satellite QSO
Christopher Hobbs, KD5RYO
Frank Garofalo, WA2NDV
Milan Stancel, OM4MX


AMSAT Communications Achievement Award
Adrian Liggins, VA3NNA, #575
Matthew Stevens, KK4FEM, #576
Milan Stancel, OM4MX, #577


AMSAT Sexagesimal Award
Ronald Parsons, W5RKN, #178
Matthew Stevens, KK4FEM, #179


AMSAT Century Club Award
Frank Westphal, K6FW, #49
Toralf Renkwitz, DJ7MS, #50
Ronald Oldham, N8RO, #51


South Africa Satellite Communications Achievement Award
Adrian Liggins, VA3NNA, #US202
Matthew Stevens, KK4FEM, #US203
Milan Stancel, OM4MX, #US204


AMSAT Robert W. Barbee Jr., W4AMI Award
Cleber Rodrigues, PY3TX, #88
Paul Stoezter, N8HM, Upgrade to 4000
Frank Westphal, K6FW, Upgrade to 2000
John Papay, K8YSE/7, Upgrade to 3000


AMSAT Robert W. Barbee Jr., W4AMI Award
Ronald Parsons, W5RKN, #89
Milan Stancel, OM4MX, #90


To see all the awards visit http://www.amsat.org or

[ANS thanks Bruce Paige, KK5DO, AMSAT Director Contests and Awards
for the above information]


6E3MAYA on Satellites March 18-21

Mexico trip includes satellite operating plans:

XE, Mexico:
      A group of Mexican amateurs plans to visit archaeological sites of
      Maya culture in Yucatan, Campeche, Tabasco, Chiapas, and Quintana
      Roo from the 18th to 21st. QRV with the call 6E3MAYA on 80-6m on
      SSB, CW, digital modes and via satellites. QSL via XE3N, LoTW.

[ANS thanks the DARC DX Newsletter DXNL 2032 March 15, 2017 for the 
above information]


AMSAT Events

Information about AMSAT activities at other important events around
the country.  Examples of these events are radio club meetings where
AMSAT Area Coordinators give presentations, demonstrations of working
amateur satellites, and hamfests with an AMSAT presence (a table with
AMSAT literature and merchandise, sometimes also with presentations,
forums, and/or demonstrations).

*Friday through Sunday, 31 March–2 April 2017, NVCON in Las Vegas NV

*Wednesday, 5 April 2007 – presentation for Scottsdale Amateur Radio 
Club in Scottsdale AZ

*Friday and Saturday, 7-8 April 2017, Green Country Hamfest in
Claremore OK

*Saturday, 6 May 2017 – Cochise Amateur Radio Association hamfest in
Sierra Vista AZ

*19-21 May 2017, HamVention in the Greene County Fairgrounds and
Expo Center, Dayton, Ohio

*Friday and Saturday, 9-10 June 2017, HAM-COM in Irving TX

*Saturday, 10 June 2017 – Prescott Hamfest in Prescott AZ

[ANS thanks AMSAT-NA for the above information]



Successful Contacts

*  A direct contact with students at McBride High School, Long Beach, 
CA, USA was successful Wed 2017-03-15 16:28:44 UTC 25 deg. Astronaut 
Thomas Pesquet, KG5FYG answered all 19 questions prepared by students.

Upcoming Contacts

*  A telebridge contact via W6SRJ with students at “School of Trois  
Paletuviers”, Saint-Georges de l'Oyapock, French Guyana, is presently 
scheduled Thu 2017-03-23 12:42:26 UTC 61 deg. with Astronaut Thomas 
Pesquet KG5FYG.

Trois Palétuviers is a small native people village of French Guyane, set 
between the Amazonian forest and the majestic Oyapock River, a natural 
border with Brazil. It is accessed only by dugout and the journey takes 
place in one hour. On site, no electricity during the day, internet and 
telephone recently, but a quality of life preserved, which in no way 
excludes projects and achievements in order to help envisage the future 
in a dynamic and optimistic way. The village comprises a population of 
180 inhabitants, exclusively Native Americans and many of whom have 
strong ties with Brazil.

The school hosts about fifty students divided into 2 classes: a 
kindergarten from the PS to the GS, an elementary from the CP to the 
CM2. In addition to the usual teachings, the school offers activities 
that enable you to travel and make contact with the outside of the 
village. So :

The "chess game for academic success" has been helping since 2006 to 
reason and confidence in its abilities,
The theater club has already performed several times in French Guiana.
A highly eclectic choir gives everyone the opportunity to express 

In addition, there are urban dance classes, numerous programs and 
projects related to the environment, space, health and so on.
Another peculiarity is that a school for parents has been in place since 

For the liaison with the ISS, the pupils will travel 1 hour of canoe 
motor and 3 hours of road.

*  A direct contact via AA4UT with students at the Student Space 
Technology Association, Knoxville, TN, USA  will be rescheduled.

The University of Tennessee Knoxville is an amazing school located in 
the hills of Tennessee. It is the largest campus in the state, hosting 
more than 30,000 students. This school is known for its engineering and 
science heritage, having close ties with research facilities such as Oak 
Ridge National Lab and companies like Alcoa. Also, included in our 
alumni are 9 astronauts including the recent ISS inhabitant Scott Kelly. 
Our school is filled with thousands of eager students seeking to pursue 
careers in the space industry. With our vision of becoming a top-tier 
research school, our students are set to become the next leaders in STEM 


ARISS  is always glad to receive listener reports for the above 
contacts. ARISS  thanks everyone in advance for their assistance. Feel 
free to send your  reports to aj9n @ amsat.org or aj9n @ aol.com.


Message to US Educators
Amateur Radio on the International Space Station
Contact  Opportunity

Call for Proposals
Proposal Window February 15 –  April 15, 2017

The Amateur Radio on the International Space  Station (ARISS) Program is 
seeking formal and informal education institutions  and organizations, 
individually or working together, to host an Amateur Radio  contact with 
a crew member on board the ISS.  ARISS anticipates that the  contact 
would be held between January 1, 2018 and June 30, 2018. Crew 
scheduling  and ISS orbits will determine the exact contact dates. To 
maximize these radio contact opportunities, ARISS is ;
looking for organizations that will draw large numbers of
participants and integrate the contact into a well-developed education

The deadline to submit a proposal is April 15,  2017.  Proposal 
information and documents can be found at

The Opportunity
Crew  members aboard the International Space Station will participate in 
scheduled  Amateur Radio contacts. These radio contacts are 
approximately 10 minutes in  length and allow students to interact with 
the astronauts through a question-and-answer session.

An ARISS contact is a voice-only  communication opportunity via Amateur 
Radio between astronauts and cosmonauts  aboard the space station and 
classrooms and communities. ARISS contacts afford education audiences 
the opportunity to learn firsthand from astronauts what it  is like to 
live and work in space and to learn about space research conducted on  
the ISS. Students also will have an opportunity to learn about 
satellite  communication, wireless technology, and radio science. 
Because of the nature of human spaceflight and the complexity of 
scheduling activities aboard the ISS,  organizations must demonstrate 
flexibility to accommodate changes in dates and  times of the radio contact.

Amateur Radio organizations around the  world, NASA, and space agencies 
in Russia, Canada, Japan and Europe sponsor this educational opportunity 
by providing the equipment and operational support to  enable direct 
communication between crew on the ISS and students around the  world via 
Amateur Radio.
In the US, the program is managed by AMSAT (Radio  Amateur Satellite
Corporation) and ARRL (American Radio Relay League) in partnership with 
NASA and CASIS (Center for the Advancement of Science in Space).

More Information
Interested parties can find  more information about the program at
www.ariss.org and  www.arrl.org/ARISS.

For proposal information and more  details such as expectations, 
proposal guidelines and proposal form, and dates  and times of 
Information Sessions go to
Please direct any  questions to
ariss @ arrl.org.


ARISS  is always glad to receive listener reports for the above 
contacts. ARISS  thanks everyone in advance for their assistance. Feel 
free to send your reports to aj9n @ amsat.org or aj9n @ aol.com.

Listen for the ISS on  the downlink of 145.8Ø  MHz.


All  ARISS contacts are made via the Kenwood radio unless otherwise  noted.


Several  of you have sent me emails asking about the RAC ARISS website 
and not being  able to get in.  That has now been changed to

Note that there are links to other ARISS  websites from this site.

Looking  for something new to do?  How about receiving DATV from the  ISS?

If interested, then please go to the ARISS-EU website for complete
details.  Look for the buttons indicating Ham Video.


If you need some  assistance, ARISS mentor Kerry N6IZW, might be able to 
provide some  insight.  Contact Kerry at
kbanke @ sbcglobal.net

ARISS  congratulations the following mentors who have now mentored over 100

Satoshi 7M3TJZ with 123
Gaston ON4WF with  123
Francesco IKØWGF with  119


The  webpages listed below were all reviewed for accuracy.  Out of date 
webpages were removed and new ones have been added.  If there are
additional ARISS websites I need to know about, please let me know.

Note, all times are approximate.  It is recommended that you  do your 
own orbital prediction or start listening about 10 minutes before  the 
listed time.
All dates and times listed follow International  Standard ISO 8601 date 
and time format  YYYY-MM-DD HH:MM:SS

The complete schedule page has been updated as of 2017-03-09 05:00 UTC.
Here you will find a listing of all scheduled school contacts, and
questions, other ISS related websites, IRLP and Echolink websites, and
instructions for any contact that may be streamed live.


Total  number of ARISS ISS to earth school events is 1116.
Each school counts  as 1 event.
Total number of ARISS ISS to earth school contacts is 1080.
Each contact may have multiple schools sharing the same time slot.
Total number of ARISS supported terrestrial contacts is 47.

A  complete year by year breakdown of the contacts may be found in the

Please  feel free to contact me if more detailed statistics are needed.


The following US states and entities have never had an ARISS contact:
Arkansas, Delaware, South Dakota, Wyoming, American Samoa, Guam, 
Northern Marianas Islands, and the Virgin Islands.


QSL  information may be found at:



The  successful school list has been updated as of 2017-02-23 05:00 UTC.


Frequency chart for packet, voice, and crossband repeater modes showing 
Doppler correction as of 2005-07-29 04:00  UTC

Listing of ARISS related magazine articles as of 2006-07-10 03:30 UTC.

Check  out the Zoho reports of the ARISS  contacts



Exp.  49 on orbit
Shane Kimbrough KE5HOD
Andrei Borisenko
Sergey  Ryzhikov

Exp. 50 on orbit
Peggy Whitson
Thomas Pesquet  KG5FYG
Oleg  Novitskiy


for information about upcoming contacts as they are scheduled.

[ANS thanks ARISS and Charlie, AJ9N for the above information]


Satellite Shorts from All Over

Help Wanted - Russian Space Agency

If you know what this means, "Mukhnem na Lunu: Rossiya
ishchet novykh kosmonavtov"*, you may be able to apply
at Russia's space agency, who on Tuesday announced a
recruitment drive for young would-be cosmonauts who it
hopes will become the country's first on the Moon. And
women are welcome, an official stressed.

In the first such drive for five years, Roscosmos space
agency said it is looking for 6 to 8 cosmonauts who will
operate a new-generation spaceship now in development and
"will become the first Russians to fly to the Moon".

The full story is posted at:

*Translation: Fly me to the Moon: Russia seeks new cosmonauts

[ANS thanks SpaceDaily.com 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 addi-
tional benefits. Application forms are available from the AMSAT

Primary and secondary school students are eligible for membership
at one-half the standard yearly rate. Post-secondary school students
enrolled in at least half time status shall be eligible for the stu-
dent rate for a maximum of 6 post-secondary years in this status.
Contact Martha at the AMSAT Office for additional student membership

This week's ANS Editor,
Joe Spier, K6WAO
k6wao at amsat dot org

-73, k6wao
AMSAT Vice President Educational Relations
AMSAT News Service Co-Editor
ARISS-NA Education
2017 AMSAT Space Symposium Chairman

Via the ANS mailing list courtesy of AMSAT-NA

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