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From: I0OJJ @ I0OJJ.ITA.EU (Gustavo)
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>From: "Frank Karnauskas (N1UW) via ANS" <ans@amsat.org
>Subject: [ANS] ANS-336 AMSAT News Service Weekly Bulletins
>Date: Sat, 30 Nov 2024 19:12:32 EST
>Reply-To: "Frank Karnauskas (N1UW)" <f.karnauskas@amsat.org>
>To: space@ww
In this edition:
* AMSAT OSCAR-7 50th Anniversary: CodeStore Breaking New Ground
* GridMasterMap Satellite Top 100 Rovers December 2024 Rankings
* Japan Launches World's First Wooden Satellite to Test Timber in Space
* Open-Weather APT: Updates to the Web Based NOAA APT Image Decoder
* ARISS News
* Upcoming Satellite Operations
* AMSAT Ambassador Activities
* Satellite Shorts From All Over
*
The AMSAT News Service bulletins are a free, weekly news and information
service of AMSAT, 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 satellites.
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
[dot] org.
You can sign up for free e-mail delivery of the AMSAT News Service Bulletins
via the ANS List; to join this list see:
https://mailman.amsat.org/postorius/lists/ans.amsat.org/
ANS-336 AMSAT News Service Weekly Bulletins
To: All RADIO AMATEURS
From: Radio Amateur Satellite Corporation
712 H Street NE, Suite 1653
Washington, DC 20002
DATE 2024 Dec 01
AMSAT OSCAR-7 50th Anniversary: CodeStore Breaking New Ground
There has always been a fascination among radio amateurs in digital modes of
communications. In thinking about where this spacecraft sits in electronic
history, it is all too easy to forget that it was designed at least three
years before the appearance of the first 8-bit microprocessor. The notion of
packet communications was still nearly 10 years into the future. The team
wanted to demonstrate that they could store data at-will on a spacecraft in
transit across the sky and then download it at another location. They wanted
to demonstrate non-real-time digital communications to themselves and to the
world.
Jan King, W3GEY, AMSAT OSCAR-7 Project Manager explains, â^`^|Thinking in
retrospect, that experiment wasnâ^`Oet the best it could have been. However, it
was simple and it proved our resolve. The entry in 1972 on AO-6 and, then
again, in 1974 on-board AO-7 was a demonstration experiment we called
CodeStore. And, it did lead to far more ambitious packetized,
store-and-forward data satellites in our future.
â^`^|It probably wasnâ^`Oet the best choice at the time, but we chose the command
frequency for the uplink. This meant we didnâ^`Oet have to implement yet
another receiver. However, this made the experiment far less accessible to
hams than it could have. AMSAT did not want to share the knowledge of the
command frequency and codes with anyone who didnâ^`Oet have a need to know
them. Thus, CodeStore was not an experiment that was shared with everyone as
were the communications transponders. It could realistically only be used by
authorized command stations. We had hoped for a universal store-and-forward
demonstration, but what was in fact created was a broadcast tool and in that
regard CodeStore was very successful.â^`^}
CodeStore was the brainchild of and was designed and fabricated by John
Goode, W5CAY. In one small module, he housed an AFSK decoding system, which
allowed uplink data to be clocked into a â^`^|longâ^`^} shift register containing
896 bits. This was done with the memory IC's of the day. What one could
manage then was 14 IC's each containing 64 bits of serial data storage. The
contents of the shift register was sequentially downlinked first-in-first-out
(FIFO) to the selected beacon when CodeStore was commanded to the RUN mode.
This number of bits is divisible by 8 so one might have expected that a
downlinked message of 112 8-bit words. No, this was 1974 so Morse Code
messages were downlinked. The idea was more individuals can copy a broadcast
message if they donâ^`Oet need specialized decoding equipment. King adds, â^`^|No
one can deny that we could have made a better go of it if the notion of a
remote terminal digital communications goal had remained pure. It did not.â^`^}
â^`^|Ultimately, its highest value was discovered to be to store the
spacecraftâ^`Oes NORAD TLEs as well as any critical AO-7 operating schedule
modifications, which might be of importance to the users. CodeStore was
already available for use on AO-6. So, users were already expecting this
feature, which appeared regularly on the beacons.â^`^}
While CodeStore was used on both AO-6 and AO-7 to demonstrate non-real-time
communications via satellite, it was never used by independent remotely
located stations to demonstrate two-way communications in that way. The
memory facilities required on-board and the lack of any firmware that even
approached the capabilities of a file handling system did not exist in
1972-74. That would have to wait for another day when, once again, four AMSAT
spacecraft in a small constellation would demonstrate a proper
store-and-forward packet handling system. That was to occur in 1990.
CodeStore went into service as a broadcast device allowing users to receive,
in Morse Code, the latest, (then) NORAD TLEs. CodeStore was a complete
success. It saved command stations a tremendous amount of work, avoiding the
need for a global network of operators who would otherwise be needed to relay
the same data.
Persons wanting to read more about the life and history of AMSAT OSCAR-7 are
invited to visit https://www.amsat.org/amsat-ao-7-a-fifty-year-anniversary/.
[ANS thanks Jan King, W3GEY, AMSAT OSCAR-7 Project Manager for the above
information.]
________________________________
GridMasterMap Satellite Top 100 Rovers December 2024 Rankings
The December 2024 rankings for the Top 100 Rovers (Mixed LEO/MEO/GEO) in
satellite operations, as determined by @GridMasterMap on Twitter, has been
released. The ranking is determined by the number of grids and DXCC entities
activated, taking into account only those grids where a minimum number of
QSO's logged on the gridmaster.fr website have been validated by a third
party. Grid numbers do not directly reflect the exact number of activations.
Satellite operators are encouraged to upload their LoTW satellite contacts to
https://gridmaster.fr in order to provide more accurate data.
Updated: 2024-11-29
1
ND9M
26
KX9X
51
N6DNM
76
LU4JVE
2
NJ7H
27
ON4AUC
52
JK2XXK
77
AA8CH
3
JA9KRO
28
KG5CCI
53
EB1AO
78
VE1VOX
4
UT1FG
29
N5BO
54
EA4NF
79
FG8OJ
5
N5UC
30
K8BL
55
SM3NRY
80
PT9BM
6
DL6AP
31
KE4AL
56
JL3RNZ
81
KJ7NDY
7
OE3SEU
32
KB5FHK
57
DF2ET
82
KI7UXT
8
WI7P
33
VE3HLS
58
XE1ET
83
YU0W
9
DP0POL
34
KI0KB
59
AA5PK
84
KB2YSI
10
K5ZM
35
KI7UNJ
60
KI7QEK
85
N6UTC
11
F5VMJ
36
LA9XGA
61
SP5XSD
86
N4DCW
12
N6UA
37
PA3GAN
62
F4DXV
87
WA9JBQ
13
HA3FOK
38
JO2ASQ
63
AD7DB
88
JM1CAX
14
WY7AA
39
F4BKV
64
VE1CWJ
89
VE3GOP
15
N9IP
40
BA1PK
65
KE9AJ
90
N0TEL
16
W5PFG
41
N7AGF
66
DL4EA
91
KG4AKV
17
AK8CW
42
VK5DG
67
N8RO
92
W8MTB
18
DL2GRC
43
VA3VGR
68
VA7LM
93
K0FFY
19
AD0DX
44
XE3DX
69
KM4LAO
94
CU2ZG
20
LU5ILA
45
KE0WPA
70
M1DDD
95
VE7PTN
21
N4AKV
46
PR8KW
71
W8LR
96
K6VHF
22
WD9EWK
47
K7TAB
72
W1AW
97
AF5CC
23
ND0C
48
KE0PBR
73
N4UFO
98
VE6WK
24
AD0HJ
49
AC0RA
74
HB9GWJ
99
DK9JC
25
DJ8MS
50
W7WGC
75
PT2AP
100
BG7QIW
[ANS thanks @GridMasterMap for the above information.]
________________________________
Only four Weeks Left!
And the 2024 AMSAT Presidentâ^`Oes Club Coins Are Gone!
Help Support GOLF and Fox Plus
[cid:image001.jpg@01DB4320.F10F2E40]
Join the AMSAT President's Club today and help
Keep Amateur Radio in Space!
https://www.amsat.org/join-the-amsat-presidents-club/
________________________________
Japan Launches World's First Wooden Satellite to Test Timber in Space
Japanese researchers launched the worldâ^`Oes first wooden satellite, LignoSat,
into space, marking an ambitious step toward exploring the viability of
timber for lunar and Martian construction. This pioneering satellite,
developed collaboratively by Kyoto University and Sumitomo Forestry, was sent
to the International Space Station aboard a SpaceX mission from NASAâ^`Oes
Kennedy Space Center on November 4, 2024. Once at the ISS, LignoSat will be
released into orbit approximately 400 kilometers (250 miles) above Earth.
[cid:image002.jpg@01DB4320.F10F2E40]
LignoSat, a 1U-sized CubeSat, carries an Amateur Radio mission that will
extract callsigns from the FM packet data signals uplinked, and respond to
them by using the CW downlink with their call signs.
An educational mission is to educate students to learn about the
characteristics of the satellite by acquiring its housekeeping data such as
the internal temperature, the strain of the wooden structure, and the
Earthâ^`Oes magnetic field and calculating the rotational direction and rate of
the satellite as well as observing the effect of the space environment on the
wooden structure.
The satellite, whose name derives from the Latin word for "wood," is a
compact, palm-sized structure. LignoSatâ^`Oes mission is to demonstrate the
potential of wood as a sustainable and durable material for space
exploration. Takao Doi, a former astronaut and a current researcher at Kyoto
University, expressed that using timber could pave the way for constructing
habitats that support human life and work in space indefinitely. â^`^|With
timber, a material we can produce by ourselves, we will be able to build
houses, live, and work in space forever,â^`^} Doi said.
Doiâ^`Oes team is working under a 50-year vision of building timber structures
on the Moon and Mars, planting the seeds for future space-based
infrastructure. The researchers opted for Honoki, a type of magnolia tree
native to Japan traditionally used for sword sheaths, after conducting a
10-month experiment on the ISS. Honoki proved its resilience, leading to its
selection as the core material for LignoSat. The satellite was constructed
using a traditional Japanese craft technique without screws or glue,
showcasing innovation steeped in heritage.
One of LignoSatâ^`Oes key roles in its six-month orbit will be to measure the
endurance of wood against extreme space temperatures, which oscillate from
-100 to 100 degrees Celsius (-148 to 212 degrees Fahrenheit) every 45 minutes
as the satellite shifts from sunlight to darkness. The onboard sensors will
also monitor how well wood mitigates space radiationâ^`Oes impact on
semiconductors, information that could be pivotal for designing data centers
and other space-based structures. Kenji Kariya of Sumitomo Forestry
emphasized the cutting-edge nature of this research, noting that despite
appearing old-fashioned, wood could be integral to future space technology.
The environmental benefits of using wood in space are significant. Unlike
conventional metal satellites that produce polluting aluminum oxide particles
upon re-entry, wooden satellites would disintegrate more cleanly in Earthâ^`Oes
atmosphere. â^`^|A wooden satellite burns up with much less pollution compared
to metal ones,â^`^} Doi stated. This feature could be an advantage as the space
industry grapples with sustainability and the proliferation of space debris.
[cid:image003.jpg@01DB4320.F10F2E40]
The team behind LignoSat is optimistic that their experiment could spur wider
adoption of timber in space exploration. Doi even hinted at the potential for
future partnerships, saying, â^`^|If we can prove our first wooden satellite
works, we want to pitch it to Elon Muskâ^`Oes SpaceX.â^`^} The successful
deployment of LignoSat could mark the beginning of a new era where
traditional materials meet advanced space technology, reinvigorating the
timber industry and pushing the boundaries of sustainable innovation in space
exploration.
A downlink on 435.820 MHz has been coordinated for CW, 4k8 GMSK AX25
telemetry and FM. More info at
https://space.innovationkyoto.org/amateur-radio-operators/
[ANS thanks Kantaro Komiya and Irene Wang, Reuters, for the above
information.]
________________________________
Open-Weather APT: Updates to the Web Based NOAA APT Image Decoder
Dr. Sasha Engelmann and Sophie Dyer, the team behind the Open-Weather project
have recently announced the launch of their new version of open-weather app,
a web-based NOAA APT image decoder. The web-based program accepts a WAV file
containing a NOAA satellite APT recording, demodulates and decodes it, and
displays the resulting weather satellite image.
Sasha writes, "â^`¦Open-weather apt is the only public, maintained,
browser-based decoder for Automatic Picture Transmissions (APT) from
satellites NOAA-19, NOAA-18 and NOAA-15. It was developed to improve access
to satellite signal decoding for all practitioners.
[cid:image004.png@01DB4320.F10F2E40]
"We are excited to share a new and improved version available here! The new
version includes the following updates and additional features:
* Improved accuracy in decoding and finding sync positions (locates more
sync positions than other comparable decoders)
* Upload a WAV file of any sample rate (no more re-sampling with
Audacity!)
* Option to see the â^`^xrawâ^`Oe image without syncing, and to â^`^xFind the
Syncsâ^`Oe
* Option to Rotate 180 degrees, often useful for viewing images from
nighttime passes
* Go deeper in your analysis: explore Signal Value and Image Value
Histograms
* Upload directly from open-weather apt to the Public Archive
"Open-weather apt is co-developed by open-weather with Rectangle (Lizzie
Malcolm and Dan Powers), Bill Liles (NQ6Z) and Grayson Earle."
Complete information at https://open-weather.community/decode/.
[ANS thanks RTL-SDR.com for the above information.]
________________________________
Need new satellite antennas?
Purchase M2 LEO-Packs from the AMSAT Store.
[cid:image005.png@01DB4320.F10F2E40]
When you purchase through AMSAT, a portion of the proceeds goes towards
Keeping Amateur Radio in Space.
https://amsat.org/product-category/hardware/
________________________________
Changes to AMSAT TLE Distribution for November 29, 2024
Two Line Elements or TLEs, often referred to as Keplerian elements or keps in
the amateur community, are the inputs to the SGP4 standard mathematical model
of spacecraft orbits used by most amateur tracking programs. Weekly updates
are completely adequate for most amateur satellites. TLE bulletin files are
updated daily in the first hour of the UTC day. New bulletin files will be
posted immediately after reliable elements become available for new amateur
satellites. More information may be found at
https://www.amsat.org/keplerian-elements-resources/.
The following satellite has been added to this week's AMSAT TLE distribution:
AO-123 Provisional catalog number 99130 IARU coordinated downlink 435.4000
MHz.
[ANS thanks Joe Fitzgerald, KM1P, AMSAT Orbital Elements Manager, for the
above information.]
________________________________
Want to fly the colors on your own grid expedition?
[cid:image006.png@01DB4320.F10F2E40]
Get your AMSAT car flag and other neat stuff from our Zazzle store!
25% of the purchase price of each product goes towards
Keeping Amateur Radio in Space
https://www.zazzle.com/amsat_gear
________________________________
ARISS NEWS
Amateurs and others around the world may listen in on contacts between
amateurs operating in schools and allowing students to interact with
astronauts and cosmonauts aboard the International Space Station. The
downlink frequency on which to listen is 145.800 MHz worldwide.
[ARISS News]
Upcoming Contacts
South Carolina RWAs (Regional Workforce Advisors), Columbia, SC, direct via
N4EE.
The ISS callsign is presently scheduled to be NA1SS.
The scheduled crewmember is Nick Hague, KG5TMV.
The ARISS mentor is Don Hopson, K4CF.
Contact is go for Monday, December 2, 2024 at 16:22 UTC.
Watch for Livestream at https://dew.sc.gov/.
Simferopol College of Radio Electronics, Simferopol, Russia, direct via TBD.
The ISS callsign is presently scheduled to be RSÃ^xISS.
The scheduled crewmember is Ivan Vagner.
The ARISS mentor is RV3DR .
Contact is go for Monday, December 2, 2024 at 15:15 UTC.
CEIP INDAUTXUKO ESKOLA HLHI, Bilbao, Spain, telebridge via ON4ISS.
The ISS callsign is presently scheduled to be OR4ISS.
The scheduled crewmember is Sunita Williams, KD5PLB.
The ARISS mentor is Marcelo Teruel, IK0USO.
Contact is go for: Wednesday, December 4, 2024 at 11:47 UTC.
State Budgetary Educational Institution "Vorobyovy Gory", Moscow, Russia,
direct via TBD.
The ISS callsign is presently scheduled to be RSÃ^xISS.
The scheduled crewmember is Alexander Gorbunov.
The ARISS mentor is RV3DR.
Contact is go for Thursday, December 5, 2024 at 11:00 UTC.
Shchyolkovo, Russia, direct via TBD.
The ISS callsign is presently scheduled to be RSÃ^xISS.
The scheduled crewmember is Aleksey Ovchinin.
The ARISS mentor is RV3DR.
Contact is go for Friday, December 6, 2024 at 10:10 UTC.
Publiczna Szkola Podstawowa im. Walentego Stefanskiego w Bodzechowie,
Bodzechow, Poland, direct via SP7POS.
The ISS callsign is presently scheduled to be OR4ISS.
The scheduled crewmember is Don Pettit, KD5MDT.
The ARISS mentor is Armand Budzianowski, SP3QFE.
Contact is go for Friday, December 6, 2024 at 11:49 UTC.
Completed Contacts
Colegio do Castanheiro, Ponta Delgada, Azores, direct via CQ8CDC.
The ISS callsign is presently scheduled to be OR4ISS.
The scheduled crewmember is Don Pettit, KD5MDT.
The ARISS mentor is Marcelo Teruel,IK0USO.
Contact was successful on Tuesday, November 26, 2024 at 14:57 UTC.
The crossband repeater continues to be active (145.990 MHz up {PL 67} &
437.800 MHz down). If any crewmember is so inclined, all they have to do is
pick up the microphone, raise the volume up, and talk on the crossband
repeater. So give a listen, you just never know.
The packet system is also active (145.825 MHz up & down).
As always, if there is an EVA, a docking, or an undocking; the ARISS radios
are turned off as part of the safety protocol.
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.
The latest information on the operation mode can be found at
https://www.ariss.org/current-status-of-iss-stations.html
The latest list of frequencies in use can be found at
https://www.ariss.org/contact-the-iss.html
[ANS thanks Charlie Sufana, AJ9N, one of the ARISS operation team mentors for
the above information.]
________________________________
Upcoming Satellite Operations
* ADÃ^xHJ is planning his last 2024 rove to the Missouri Ozarks area
between December 5-8, 2024. Mitch has never been to that area so he is
looking to do some sightseeing and activate eight new satellite grid squares.
EM26-EM28, EM36-EM39, and EN30. He will be working RS-44 passes in the
evenings. See https://hams.at for details.
A growing number of satellite rovers are currently engaged in sharing their
grid square activations on https://hams.at. By visiting the website, you gain
easy access to comprehensive information about the operators responsible for
activating specific grid squares. Additionally, you have the ability to
assess the match score between yourself and a particular rover for a given
pass, while also being able to identify the upcoming satellite passes that
are accessible from your location.
[ANS thanks Ian Parsons, K5ZM, AMSAT Rover Page Manager, and Alex Ners,
K6VHF, for the above information.]
________________________________
AMSAT Ambassador Activities
AMSAT Ambassadors provide presentations, demonstrate communicating through
amateur satellites, and host information tables at club meetings, hamfests,
conventions, maker faires, and other events.
[cid:image008.jpg@01DB4320.F10F2E40]
December 19, 2024
Central Kentucky Amateur Radio Society
CKARS Monthly Meeting
558 S Keeneland Dr.
Richmond, KY 40475
https://www.ckars.org/home
AI4SR
February 14-15, 2025
Yuma HAMCON and Southwestern Division Convention
Yuma County Fairgrounds
Yuma, AZ
https://www.yumahamfest.com/
N1UW
Interested in becoming an AMSAT Ambassador? AMSAT Ambassadors provide
presentations, demonstrate communicating through amateur satellites, and host
information tables at club meetings, hamfests, conventions, maker faires, and
other events. For more information go to: https://www.amsat.org/ambassador/
[ANS thanks Bo Lowrey, W4FCL, Director â^`^s AMSAT Ambassador Program for the
above information.]
________________________________
Satellite Shorts From All Over
* NASA has confirmed that one of its greatest ever missions, Voyager 1,
is back in business with communications restored following an incident in
October that had led to the veteran spacefarer losing its voice. When
engineers commanded Voyager 1 to switch on one of its heaters to give the
instruments a gentle thermal massage, a safety feature was tripped because of
low power levels. It automatically switched off non-essential systems. The
fault protection system took it upon itself to switch off the main X-band
transmitter and activate the lower-power S-band transmitter instead. Because
of the great distance between Voyager 1 and Earth, however, transmissions on
the S-band antenna could not be heard by NASA's Deep Space Network, meaning
that Voyager 1 had effectively fallen silent. NASA engineers were able to
resolve the problem early in November, and X-band communication resumed on
Nov. 18, with the spacecraft once again returning data from its four
remaining instruments. Read the complete story at
https://tinyurl.com/ANS-336-Voyager-1. [ANS thanks Space.com for the above
information.]
* In addition to all the AMSAT OSCAR-7 publicity in the news this few
weeks, AMSAT also received nice exposure about the ARISS program putting kids
in contact with astronauts. Read the complete story at
https://tinyurl.com/ANS-336-ISS. [ANS thanks Space.com for the above
information.]
________________________________
Join AMSAT Today at https://launch.amsat.org/
In addition to regular membership, AMSAT offers membership to:
* Societies (a recognized group, clubs or organization).
* 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 student rate for a maximum of 6 post-secondary
years in this status.
* Memberships are available for annual and lifetime terms.
Contact info [at] amsat [dot] org for additional membership information.
73 and remember to help Keep Amateur Radio in Space!
This week's ANS Editor, Frank Karnauskas, N1UW
f.karnauskas [at] amsat [dot] org
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