AMSAT Information Service
ANS-315
November 10, 2024
On this version:
- Celebrating AO-7: First Earth-House-House-Earth Relay Communications
- September/October 2024 Challenge of The AMSAT Journal Obtainable
- 2024 AMSAT Symposium Proceedings Obtainable to AMSAT Members
- ASRTU-1 Satellite tv for pc With FM Transponder Launched
- MO-122 Telemetry Beacon Degree and Replace – November 9, 2024
- ARISS SSTV Occasion
- Modifications to AMSAT TLE Distribution for November 8, 2024
- ARISS Information
- Upcoming Satellite tv for pc Operations
- AMSAT Ambassador Actions
- Satellite tv for pc Shorts From All Over
The AMSAT Information Service bulletins are a free, weekly information and data service of AMSAT, The Radio Novice Satellite tv for pc Company. ANS publishes information associated to Novice Radio in House together with experiences on the actions of a worldwide group of Novice Radio operators who share an energetic curiosity in designing, constructing, launching and speaking via analog and digital Novice Radio satellites.
The information feed on https://www.amsat.org publishes information of Novice Radio in House as quickly as our volunteers can put up it.
Please ship any beginner satellite tv for pc information or experiences to: ans-editor [at] amsat.org
You’ll be able to join free e-mail supply of the AMSAT Information Service Bulletins by way of the ANS Record; to hitch this listing see: https://mailman.amsat.org/postorius/lists/ans.amsat.org/
Celebrating AO-7: First Earth-House-House-Earth Relay Communications
As AO-7, launched on November 15, 1974, approaches is fiftieth Anniversary and setting a file because the longest working satellite tv for pc, we glance again at a couple of of its noteworthy accomplishments.
The downlink spectrum of AO-7’s UHF/VHF transponder overlapped with AO-6’s VHF-to-HF transponder. The overlap of the 2 was roughly 50 kHz huge. The 2 orbits have been the identical – virtually. AO-7’s imply movement was barely larger than that of AO-6, which implies, as soon as yearly of so, AO-6 will “lap” its youthful sibling in house. Throughout the time when the 2 spacecraft are in nearer proximity, it was already identified to be theoretically doable (if AO-7 has its UHF/VHF transponder on) for one consumer to speak via two spacecraft in succession, with the downlink of AO-7’s transponder being relayed via AO-6’s VHF/HF transponder uplink, after which, with the doubly relayed sign arriving on 29.5 MHz to a different consumer on the bottom. This may very well be completed, in sure geometries, in each instructions, making a two-way double-hop communications doable.
The primary profitable Earth-House-House-Earth relay of this sort befell on January 6, 1975. This occurred early in AO-7’s “first” lifetime and through the first event when AO-6 approached AO-7, of their very related orbits. The 2 stations have been each positioned within the state of Texas – one in Dallas and one in Richardson. This technique of communications was additionally performed and reported by 55 different consumer stations from 12 nations throughout 1975. These occasions have been documented within the IEEE Proceedings in October of 1975.
See one other AO-7 50 12 months Anniversary spotlight in subsequent week’s ANS Weekly Bulletin.
[ANS thanks Jan King, W3GEY, AMSAT AO-7 Project Manager for the above information]
September/October 2024 Challenge of The AMSAT Journal Obtainable
The September/October 2024 challenge of The AMSAT Journal is now out there to members on AMSAT’s Member Portal.
The AMSAT Journal is a bi-monthly digital journal for beginner radio in house lovers, printed by the Radio Novice Satellite tv for pc Company (AMSAT). Every challenge is your supply for {hardware} and software program initiatives, technical suggestions, STEM initiatives, operational actions, and information from world wide.
Contained in the Present Challenge:
- Apogee View – Robert Bankston, KE4AL
- AMSAT Awards – Bruce Paige, KK5DO
- The Historical past of AMSAT AO-7 – Jan King, W3GEY
- Lengthy Vary Modulation (LoRa) in Low Earth Satellites – Omar Álvarez Cárdenas, XE1AO, et al.
- A Go to to the Tokyo Ham Honest 2024 – Keith Baker, KB1SF/VA3KSF
- 2024 House Symposium and Annual Basic Assembly Images
[ANS thanks AMSAT for the above information]
2024 AMSAT Symposium Proceedings Obtainable to AMSAT Members
The Proceedings of the AMSAT forty second House Symposium and Annual Assembly are actually out there for AMSAT members on the AMSAT Member Portal.
On this yr’s version:
- Welcome – Robert Bankston, KE4AL
- Silent Keys
- The AMSAT CubeSatSim v2.0 Software program Overview – Alan Johnston, KU2Y
- AMSAT Training and CubeSat Simulator Challenge Replace – Alan Johnston, KU2Y
- Integration of the AMSAT CubeSat Simulator for Training and Analysis – Rachel Jones, KO4HLC
- ARISS Prototype: Automation and Distant Management (ARC) of the IORS – Chris Thompson, G0KLA / AC2CZ / VE2TCP
- FUNcube Lite on Jovian-1, A 6U College CubeSat with an AMSAT-UK Payload – David Bowman G0MRF
- CARD-SAT® – A Step Ahead for Satellite tv for pc Miniaturization – Adrian Totu, YO3HOT
- GOLF-TEE Flight Software program and Bus Overview – Burns Fisher, WB1FJ
- Willpower of Spacecraft Orbital Components from In-flight GNSS Measurement – Joseph DiVerdi, K0NMR
[ANS thanks Dan Schultz, N8FGV, AMSAT Symposium Proceedings Editor, for the above information]
2024 Cash Are Nonetheless Obtainable!
Assist Assist GOLF and Fox Plus.
Be a part of the AMSAT President’s Membership immediately!
ASRTU-1 Satellite tv for pc With FM Transponder Launched
On November 4, 2024 at 23:18 UTC, a Soyuz rocket launched from Vostochny with not less than 17 satellites utilizing beginner satellite tv for pc service frequencies. Amongst these launched was ASRTU-1, a 12U CubeSat designed by Russian and Chinese language college students and developed by the Harbin Institute of Know-how in Harbin, China, for schooling and beginner radio.
The satellite tv for pc incorporates an FM transponder, which is presently operational, with an uplink of 145.850 MHz (67 Hz CTCSS tone required) and a downlink of 435.400 MHz. After the repeater detects the tip of uplink, it’ll watch for 0.5s. If no new uplink in 0.5s, telemetry will probably be despatched. So make quick QSOs so the telemetry is much less prefer to interrupt you.
The satellite tv for pc additionally incorporates two cameras with an SSDV downlink for low decision photos on 436.210 MHz, and a excessive pace downlink on 10460.00 MHz for top decision photos.
On November 7, 2024, the digicam system was examined for the primary time. N6RFM uplinked the command and the picture was downloaded by Chinese language stations utilizing the UHF SSDV downlink.
Home windows software program for decoding telemetry is out there at https://drive.google.com/file/d/1W8nm-P0_h0J1Bd1eif74mLo-EuRdWcjH
A Dwell ISO Linux picture can be out there for telemetry at https://drive.google.com/drive/folders/1T6GMNnDNEEavckoe4oPXPIU_SPFXLDd4
A Telegram group has been created for discussing the satellite tv for pc: https://t.me/+I5NTtX7eAJA4ZDVl
Newest TLEs:
ASRTU-1_20241108D
1 99130U 24313.98869213 .00036395 00000-0 15511-2 0 00005
2 99130 097.3830 178.7387 0016365 224.8894 196.6964 15.22873038000014
| ASRTU-1 | |||
| Uplink FM (67 Hz CTCSS) |
Downlink FM | Feedback | |
| ASRTU-1 | 145.850 MHz | 435.400 MHz | In orbit, commissioning |
| Additionally downlinks on 436.210 MHz, 10460.00 MHz. Obtain Dwell CD for telemetry decoding. | |||
[ANS thanks BG2BHC, the IARU, and AMSAT-F for the above information]
MO-122 Telemetry Beacon Degree and Replace – November 9, 2024
Your continued assortment of telemetry information for MO–122/MESAT1 is all the time appreciated. For the following couple of days the telemetry beacon on MO–122 will stay at its lowest energy degree. This places the sign down a few dB, and it’s noticeable from the bottom. The low sign is a good alternative to work on enhancing the sensitivity of our receiving stations! The transponder energy stays the identical–it’s robust, because of AMSAT’s LTM (Linear Transponder Module)!
The satellite tv for pc stays in good well being. Since launch in early July, eclipse durations have elevated an excellent deal, going from about 15 minutes to just about 29 minutes. On the similar time, the orbit has precessed so the chook seems over populated areas the place the transponder will get extra use whereas in eclipse. These situations imply the battery is getting used extra with much less time to completely recharge.
We maintain a watchful eye on the battery and its reported capability, and when there’s an obvious decline it appears prudent to show off the transponder for a few days to permit restoration. The low beacon for the following couple of days will enable us to see how a lot “aid” that offers to the ability price range; it gained’t be a lot, however we are able to watch and be taught. Managing a satellite tv for pc’s energy price range is a balancing act of kinds.
The excellent news is that by the tip of February it appears like eclipse durations will drop again to round 17 minutes. On the similar time, the battery will probably be 4 months older–and have gone via plenty of orbits. Some enjoyable math- from immediately till the tip of February, there are 112 days. There are 1440 minutes per day, and MO–122 orbits about each 95 minutes. 1440 min/day / 95 min/orbit is about 15 orbits per day. So, 15 orbits / day X 122 days means virtually 1700 orbit and discharge/recharge cycles will happen earlier than the tip of February! Do this along with your energy drill battery pack 😉
Hopefully my replace will assist present a solution to the logical query, “why is the transponder being turned on and off?” Because the visitor payload on UMaine’s satellite tv for pc, we’re doing our greatest to be good stewards of an vital useful resource, whereas additionally studying about LTM, lithium batteries, and powerbudgets—all of which is useful to our engineering groups as they work on new birds like Fox-Plus and the GOLF household.
Benefit from the chook!
[ANS thanks Mark Hammond, N8MH, AMSAT Director and Command Station, for the above information]
ARISS SSTV Occasion Scheduled for November 11-18
Novice Radio on the Worldwide House Station (ARISS) pronounces an SSTV occasion to be held subsequent week. The occasion is scheduled to start on Monday, November 11 at 11:50 UTC and to finish Monday, November 18 at 13:40 UTC. SSTV transmissions will probably be paused throughout scheduled faculty contacts on November 15 and 16. Downlink transmissions will probably be at 145.800 MHz and the mode is anticipated to be PD 120.
The transmissions will encompass 12 photos that includes actions from the 2024 40th Anniversary Celebrating Novice Radio in Human Spaceflight. If you’re a previous participant in our SSTV occasions, please word that we are going to be utilizing our newly up to date gallery at https://ariss-usa.org/ARISS_SSTV/ .
ARISS has a brand new solution to request a particular certificates. When individuals efficiently obtain not less than one picture and submit it on the new gallery, individuals will probably be moved to a thank-you web page. There, an individual can learn textual content about information safety, and press the button that claims “I agree,” and obtain an e-mail in two weeks or sooner with a certificates. If an individual submits further photos, the thank-you web page tells them they’ve already requested for a certificates.
Because of our consumer neighborhood for collaborating in ARISS.
[ANS thanks Dave Jordan, AA4KN, ARISS PR, for the above information]
Modifications to AMSAT TLE Distribution for November 8, 2024
Two Line Components or TLEs, also known as Keplerian components or keps within the beginner neighborhood, are the inputs to the SGP4 customary mathematical mannequin of spacecraft orbits utilized by most beginner monitoring packages. Weekly updates are fully ample for many beginner satellites. TLE bulletin information are up to date Thursday evenings round 2300 UTC, or extra continuously if new excessive curiosity satellites are launched. Extra data could also be discovered at https://www.amsat.org/keplerian-elements-resources/
SR-0 Demosat NORAD Cat ID 60455 Decayed from orbit on or about 02 November 2024
Binar 4 NORAD Cat ID 60952 Decayed from orbit on or about 04 November 2024
SO-121 NORAD Cat ID 58567 Decayed from orbit on or about 05 November 2024
Binar 3 NORAD Cat ID 60957 Decayed from orbit on or about 05 November 2024
[ANS thanks Joe Fitzgerald, KM1P, AMSAT Orbital Elements Manager, for the above information]
Want new satellite tv for pc antennas?
Buy an M2 LEO-Pack from the AMSAT Retailer!
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ARISS Information
Amateurs and others world wide could pay attention to contacts between amateurs working in colleges and permitting college students to work together with astronauts and cosmonauts aboard the Worldwide House Station. The downlink frequency on which to hear is 145.800 MHz worldwide.
Worldwide Aerospace College named after U.N. Sultanov, Ufa, Russia, direct by way of RZ9WWB
The ISS callsign is presently scheduled to be RSØISS
The ARISS mentor is RV3DR
Contact is go for Fri 2024-11-01 21:08 UTC
If anybody heard this contact, please let ARISS know.
Scuola Primaria “Bandello”, Castelnuovo Scrivia, Italy, telebridge by way of VK6MJ
The ISS callsign is presently scheduled to be NA1SS
The scheduled crewmember is Sunita Williams KD5PLB
The ARISS mentor is IZ2GOJ
Contact was profitable: Thu 2024-11-07 07:56:25 UTC 25 deg
Congratulations to the Scuola Primaria “Bandello” college students, Sunita, mentor IZ2GOJ, and telebridge VK6MJ!
Bishop O’Connell HS, Arlington, VA, telebridge by way of VK4ISS
The ISS callsign is presently scheduled to be NA1SS
The scheduled crewmember is Nick Hague
The ARISS mentor is AA6TB
Contact is go for: Fri 2024-11-15 18:06:21 UTC 46 deg
SWSU, Kursk, Russia, direct by way of TBD
The ISS callsign is presently scheduled to be RSØISS
The scheduled crewmember is Alex Gorbunov
The ARISS mentor is RV3DR
Contact is go for Fri 2024-11-15 19:15 UTC
Cottam Scouts, Cottam, ON, Canada, telebridge by way of IK1SLD
The ISS callsign is presently scheduled to be OR4ISS
The scheduled crewmember is Sunita Williams KD5PLB
The ARISS mentor is VE6JBJ
Contact is go for: Sat 2024-11-16 18:17:04 UTC 53 deg
Aznakaevsky district resp. Tatarstan, Russia, direct by way of TBD
The ISS callsign is presently scheduled to be RSØISS
The scheduled crewmember is Ivan Vagner
The ARISS mentor is RV3DR
Contact is go for Tue 2024-11-19 16:05 UTC
Middle for the Improvement of Youngsters and Youth Creativity within the Metropolis of Pugachev, Saratov Area, Russia, direct by way of TBD
The ISS callsign is presently scheduled to be RSØISS
The scheduled crewmember is Aleksey Ovchinin
The ARISS mentor is RV3DR
Contact is go for Wed 2024-11-20 15:15 UTC
Amur State College, Blagoveshchensk, Russia, direct by way of TBD
The ISS callsign is presently scheduled to be RSØISS
The scheduled crewmember is Alex Gorbunov
The ARISS mentor is RV3DR
Contact is go for Thu 2024-11-21 11:25 UTC
Many instances a faculty could make a final minute determination to do a Livestream or run into a final minute glitch requiring a change of the URL however we at ARISS could not get the URL in time for publication. You’ll be able to all the time examine https://reside.ariss.org/ to see if a faculty is Livestreaming.
As all the time, if there’s an EVA, a docking, or an undocking; the ARISS radios are turned off as a part of the protection protocol.
The crossband repeater continues to be energetic (145.990 MHz up {PL 67} & 437.800 MHz down), If any crewmember is so inclined, all they must do is decide up the microphone, increase the quantity up, and discuss on the crossband repeater. So give a hear, you simply by no means know.
Word, all instances are approximate. It is strongly recommended that you simply do your personal orbital prediction or begin listening about 10 minutes earlier than the listed time.
The most recent data on the operation mode might be discovered at https://www.ariss.org/current-status-of-iss-stations.html
The most recent listing of frequencies in use might be discovered 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 tv for pc Operations
A rising variety of satellite tv for pc rovers are presently engaged in sharing their grid sq. activations on https://hams.at. By visiting the web site, you achieve quick access to complete details about the operators accountable for activating particular grid squares. Moreover, you will have the power to evaluate the match rating between your self and a selected rover for a given cross, whereas additionally with the ability to establish the upcoming satellite tv for pc passes which can be accessible out of your location.
Guyana: Aldir, PY1SAD (ZZ1M), operates from Georgetown as 8R1TM between Oct. 12 and Nov. 24 on 160-10m (CW, SSB, digital modes) and by way of satellites. QSL by way of LoTW, eQSL, qrz.com. (From DXNL 2427 – October 9, 2024)
[ANS thanks Ian Parsons, K5ZM, AMSAT Rover Page Manager, for the above information]
Need to fly the colours by yourself grid expedition?
Get an AMSAT automotive flag and different neat stuff from our Zazzle retailer!
25% of the acquisition worth of every product goes in direction of Holding Novice Radio in House
AMSAT Ambassador Actions
AMSAT Ambassadors present displays, reveal speaking via beginner satellites, and host data tables at membership conferences, hamfests, conventions, maker faires, and different occasions.
AMSAT Ambassador Clint Bradford, K6LCS, says,
“Suppose a 75-minute presentation on “working the simple satellites” could be acceptable on your membership or occasion? Let me know by emailing me at k6lcsclint (at) gmail (dot) com or calling me at 909-999-SATS (7287)!”
Clint has NEVER given the very same present twice: EACH of the 150+ displays to this point has been personalized/tailor-made to their audiences.
Scheduled Occasions
Yuma HAMCON
February 20-22, 2025
Yuma, AZ
N1UW
[ANS thanks Bo Lowrey, W4FCL, Director – AMSAT Ambassador Program, for the above information]
Satellite tv for pc Shorts from All Over
+Hackaday featured a homebrew LNA appropriate for satellite tv for pc operation on November 4th. https://hackaday.com/2024/11/04/a-lesson-in-rf-design-thanks-to-this-homebrew-lna/ (Because of Hackaday for the informaiton)
+ AMSAT-EA launched a press release on the decay of SO-121: “HADES-D (SO-121) satellite tv for pc has re-entered the environment, disintegrating as deliberate. Many because of the ham radio neighborhood on your help. We’re glad that, even with its low energy, many amateurs have been capable of make voice contacts and had enjoyable receiving its telemetry.” (Because of AMSAT-EA for the knowledge)
+ FO-29’s batteries are unable to help steady operation of the analog transponder all through its orbit after over 28 years. Nonetheless, JARL continues to activate the transponder at varied instances. Operation continues till the satellite tv for pc’s UVC (under-voltage management) mechanically turns off the transponder. Occasions for the rest of November are:
Nov tenth 01:50 UTC
Nov sixteenth 01:35 UTC
Nov seventeenth 02:24 UTC
Nov twenty third 02:09 UTC
Nov twenty fourth 01:15 UTC
Nov thirtieth 02:43 UTC
(Because of JARL for the knowledge)
Be a part of AMSAT immediately at https://launch.amsat.org/
Along with common membership, AMSAT provides membership to:
- Societies (a acknowledged group, golf equipment or group).
- Main and secondary faculty college students are eligible for membership at one-half the usual yearly fee.
- Publish-secondary faculty college students enrolled in not less than half time standing shall be eligible for the coed fee for a most of 6 post-secondary years on this standing.
- Memberships can be found for annual and lifelong phrases.
Contact information [at] amsat.org for added membership data.
73 and bear in mind to assist Maintain Novice Radio in House!
This week’s ANS Editor,
Paul Stoetzer, N8HM
n8hm [at] arrl.internet
ANS is a service of AMSAT, the Radio Novice Satellite tv for pc Company, 712 H Road NE, Suite 1653, Washington, DC 20002
