September 2024 - AMSAT-BB - mailman.amsat.org

Re: AO-73 question
by Mark L. Hammond 15 Sep '24

15 Sep '24

Hello, Jon. We've been helping the MESAT1 team at Univ. of Maine. https://www.mainesat.org/mesat1/ GPS on this LEO satellite does indeed work. The idea of using it for frequency stability is neat :) You can read https://iaru.amsat-uk.org/finished_detail.php?serialnum=822 and see this: "The MESAT1 spacecraft will also carry an L-band GlobalStar transmitter with a carrier frequency of 1616.25 MHz. This will be used along with the onboard GPS receiver, to provide back to our team, early mission TLEs" 73! Mark L. Hammond [N8MH] AMSAT Director and Command Station On Sat, Sep 14, 2024 at 8:13 PM Jon via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > Being in LEO orbits, can current day satellites use GPS disciplined > oscillator (GPSDO)? They are still below the GEO orbit and should > technically be able to receive GPS signals, but for the fact that they are > moving very fast. Asking just out of curiosity. > > 73 de Jon, VU2JO > > On Sat, Sep 14, 2024 at 10:30 PM graham shirville via AMSAT-BB < > amsat-bb(a)amsat.org> wrote: > >> Hi John, >> >> I am not sure if you have received any other answer but… >> >> AO73 has been operating in full time 24/7 transponder on mode for some >> time now. >> >> The telemetry is also transmitted at low power at the same time on the >> nominal 145.935 MHz. >> >> The nominal transponder frequencies remain unchanged: >> Uplink: 435.150 – 435.130 MHz LSB (Inverting) >> Downlink: 145.950 – 145.970 MHz USB >> >> But these do drift a for Hz depending upon the on board temperature – >> back in the day, perhaps twelve years ago, the design of the oscillators >> was a compromise between stability and power consumption. >> >> JO97, being a more recent design, does not have this “feature”. >> >> 73 >> >> Graham G3VZV >> >> >> >> >> >> >> From: JOHN GEIGER via AMSAT-BB <amsat-bb(a)amsat.org> >> Sent: Friday, September 13, 2024 7:02 PM >> To: amsat-bb <amsat-bb(a)amsat.org> >> Subject: [AMSAT-BB] AO-73 question >> >> Great to see that AO-73 has been QRV again. I seem to remember seeing >> somewhere that it has shifted frequency somewhat from the published >> frequencies. Is this correct? What are the current uplink and downlink >> passbands for it? >> >> 73 John AF5CC >> >> Sent using {0} >> >> >> >> >> ----------------------------------------------------------- >> >> Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available >> to all interested persons worldwide without requiring membership. >> Opinions expressed >> are solely those of the author, and do not reflect the official views of >> AMSAT-NA. >> Acceptable Use and Privacy Policies available at >> https://www.amsat.org/about-amsat/ >> >> View archives of this mailing list at >> https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org >> To unsubscribe send an email to amsat-bb-leave(a)amsat.org >> Manage all of your AMSAT-NA mailing list preferences at >> https://mailman.amsat.org > > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions > expressed > are solely those of the author, and do not reflect the official views of > AMSAT-NA. > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org

2 1

Re: AO-73 question
by Jon 15 Sep '24

15 Sep '24

Being in LEO orbits, can current day satellites use GPS disciplined oscillator (GPSDO)? They are still below the GEO orbit and should technically be able to receive GPS signals, but for the fact that they are moving very fast. Asking just out of curiosity. 73 de Jon, VU2JO On Sat, Sep 14, 2024 at 10:30 PM graham shirville via AMSAT-BB < amsat-bb(a)amsat.org> wrote: > Hi John, > > I am not sure if you have received any other answer but… > > AO73 has been operating in full time 24/7 transponder on mode for some > time now. > > The telemetry is also transmitted at low power at the same time on the > nominal 145.935 MHz. > > The nominal transponder frequencies remain unchanged: > Uplink: 435.150 – 435.130 MHz LSB (Inverting) > Downlink: 145.950 – 145.970 MHz USB > > But these do drift a for Hz depending upon the on board temperature – back > in the day, perhaps twelve years ago, the design of the oscillators was a > compromise between stability and power consumption. > > JO97, being a more recent design, does not have this “feature”. > > 73 > > Graham G3VZV > > > > > > > From: JOHN GEIGER via AMSAT-BB <amsat-bb(a)amsat.org> > Sent: Friday, September 13, 2024 7:02 PM > To: amsat-bb <amsat-bb(a)amsat.org> > Subject: [AMSAT-BB] AO-73 question > > Great to see that AO-73 has been QRV again. I seem to remember seeing > somewhere that it has shifted frequency somewhat from the published > frequencies. Is this correct? What are the current uplink and downlink > passbands for it? > > 73 John AF5CC > > Sent using {0} > > > > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions > expressed > are solely those of the author, and do not reflect the official views of > AMSAT-NA. > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org

1 0

ANS-259 AMSAT News Service Weekly Bulletins
by Paul Stoetzer 15 Sep '24

15 Sep '24

*AMSAT News Service* *ANS-259* *September 15, 2024* In this edition: - LAST DAY TO VOTE - AMSAT Board of Directors Election Concludes at 23:59 EDT on September 15th - Registration Continues for the 42nd Annual AMSAT Space Symposium & Annual General Meeting - Call for Papers - F. Brent Abbott, NA7D, Chief Revenue Officer of Rogue Space Systems Corporation, to Keynote AMSAT Space Symposium Banquet - July/August 2024 issue of *The AMSAT Journal *Now Available - Changes to AMSAT TLE Distribution for September 13, 2024 - 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 https://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 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/ ------------------------------ LAST DAY TO VOTE - AMSAT Board of Directors Election Concludes at 23:59 EDT on September 15th The nomination period for the 2024 AMSAT Board of Directors Election ended on June 15th. The following candidates have been duly nominated: - Mark Hammond, N8MH - Frank Karnauskas, N1UW - Bruce Paige, KK5DO - Paul Stoetzer, N8HM - Douglas Tabor, N6UA As three seats on the Board of Directors are up for election this year, the three candidates receiving the largest number of votes shall be declared elected to the seats. The two candidates receiving the next largest number of votes shall be declared First Alternate and Second Alternate, respectively. The voting process is now underway and will conclude at 23:59 EDT on September 15th. AMSAT members can find candidate statements and electronic voting information on AMSAT's Wild Apricot Membership Portal <https://launch.amsat.org/2024-BoD-Election>. Results will be announced no later than September 30th. *[ANS thanks Jeff Davis, KE9V, AMSAT Secretary for the above information]* ------------------------------ Registration Continues for the 42nd Annual AMSAT Space Symposium & Annual General Meeting The 42nd Annual AMSAT Space Symposium and Annual General Meeting will be held on Friday through Saturday, October 25-26, 2024, at the DoubleTree by Hilton Tampa Rocky Point Waterfront in Tampa, Florida. Highlights of all scheduled events include: - AMSAT Board of Directors Meeting, October 24-25 - 42nd AMSAT Space Symposium and Annual General Meeting, October 25-26 - Friday Night Social and Auction, October 25 - AMSAT Banquet and Reception, October 26 - AMSAT Ambassador Breakfast (all are welcome), October 27 *Note – if you wish to register guests for the banquet and/or breakfast who are not attending the Symposium sessions, you must register for each event separately and include your guests with your banquet and breakfast tickets.* If you are interested in presenting or submitting a paper for inclusion in the Symposium Proceedings, please see the Call for Papers <https://www.amsat.org/2024-symposium/call-for-papers-2024/>. *IMPORTANT: The deadline for Symposium registrations if you want to include the Saturday evening banquet or Sunday breakfast is Friday, October 18th. Meals cannot be ordered after that date.* Click Here to Register Now <https://launch.amsat.org/event-5833792>Hotel Reservations The rate for a standard room with two Queen beds is $169.00 plus state and local taxes of 14.5%. Rooms may be available for check-in on Wednesday, October 23 and check out Sunday, October 27. Rooms can be reserved at https://www.hilton.com/en/attend-my-event/radioamateursatellite/. Reservations may also be made by phone at 813-888-8800. Reference AMSAT to receive the group rate. *Note: If you are planning on driving to the Symposium or renting a car, parking charges are $20 per night for overnight parking. * We, at AMSAT, are excited to be able to host our 42nd annual Symposium this year. We hope that you can join us in celebrating Amateur Radio in Space. Schedule *Thursday, October 24, 2024* 8:00 AM – 6:00 PM AMSAT Board Meeting 6:00 PM – 8:00 PM Pre-Registration Check-in *Friday, October 25, 2024* 8:00 AM – 12:00 Noon AMSAT Board Meeting (Closed Session) 9:00 AM – 4:00 PM Registration 1:00 PM – 1:15 PM AMSAT Symposium Kickoff, President’s Welcome 1:15 PM – 5:00 PM Paper Sessions 5:00 PM – 7:00 PM Informal Dinner on your own 7:00 PM – 9:00 PM AMSAT Reception and Auction, Cash Bar Available *Saturday, October 26, 2024* 8:00 AM – 11:45 AM Registration 8:00 AM – 8:15 AM AMSAT Symposium Welcome 8:15 AM – 12:00 Noon Paper Sessions 1:00 PM – 3:15 PM Paper Sessions 3:30 PM – 4:45 PM AMSAT Annual Meeting & Awards Ceremony 6:00 PM – 7:00 PM Attitude Adjustment (Social), Cash Bar 7:00 PM – 10:00 PM AMSAT Banquet, Cash Bar *Sunday, October 27, 2024* 7:30 AM – 9:00 AM AMSAT Ambassador Breakfast (All are welcome) *[ANS thanks the AMSAT Symposium Committee for the above information]* ------------------------------ Call for Papers Papers continue to be accepted for the 42nd annual AMSAT Space Symposium to be held on the weekend of October 25-27, 2024 at the Doubletree by Hilton Tampa Rocky Point Waterfront in Tampa, Florida. Proposals for symposium papers and presentations are invited on any topic of interest to the amateur satellite community. We request a tentative title of your presentation as soon as possible, with final copy submitted by October 18 for inclusion in the symposium proceedings. Abstracts and papers should be sent to Dan Schultz, N8FGV at n8fgv(a)usa.net *[ANS thanks Dan Schultz, N8FGV, AMSAT Symposium Proceedings Editor for the above information]* ------------------------------ F. Brent Abbott, NA7D, Chief Revenue Officer of Rogue Space Systems, to Keynote AMSAT Space Symposium Banquet F. Brent Abbott, NA7D, Chief Revenue Officer of Rogue Space Systems will keynote the AMSAT Space Symposium Banquet, to be held on Saturday, October 26th. Brent has been the Chief Revenue Officer of Rogue Space Systems responsible for growth since July 2022. Before Rogue, Brent stood up the nanosatellite manufacturer NanoAvionics US office and factory as CEO and grew the US business. Before joining NanoAvionics, Brent was the CEO and head of North American operations for AAC/Clyde Space. Prior to that, he helped set up and held several senior roles at Surrey Satellite Technologies US (SST-US). He also started the hosted payload program at SST-US with the world’s first all commercial hosted payload satellite OTB-1 (Orbital Test Bed). Prior to joining Surrey in 2008, Brent served as business development manager at Honeywell Defense & Space and invented their Miniature Momentum Control System using Control Moment Gyros. His background also includes work as an engineer at Honeywell Commercial Aviation. Mr. Abbott is a registered professional engineer and graduated with a Bachelor of Science degree in electrical engineering from Iowa State University. Brent, NA7D, is a member of AMSAT and has been an amateur radio operator since 1992. *[ANS thanks the AMSAT Symposium Team for the above information]* ------------------------------ *2024 Coins Are Still Available!Help Support GOLF and Fox Plus.**Join <https://www.amsat.org/join-the-amsat-presidents-club/> the AMSAT President’s Club today!* ------------------------------ July/August 2024 issue of *The AMSAT Journal *Now Available The July/August 2024 issue of *The AMSAT Journal* is now available for AMSAT members to download on the AMSAT Member Portal <https://launch.amsat.org/The_AMSAT_Journal>. Inside the Current Issue: - Apogee View – Robert Bankston, KE4AL - Paul Graveline, K1YUB (SK) - Update: Decoding The Message from "A Sign in Space": A Year-long Journey - SETI Institute - 2024 AMSAT Field Day Results - Bruce Paige, KK5DO - AMSAT Awards - Bruce Paige, KK5DO - The Effects of Space Weather in Ham Radio Communications - Giselle M. Galván Tejada - Desktop Satellite Tracker - Zeke Wheeler, KN7JLL - The Journal Celebrates AO-7 - Paul Stoetzer, N8HM *[ANS thanks Joe Kornowksi, KB6IGK, AMSAT Journal Editor-in-Chief, for the above information]* ------------------------------ Changes to AMSAT TLE Distribution for September 13, 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 Thursday evenings around 2300 UTC, or more frequently if new high interest satellites are launched. More information may be found at https://www.amsat.org/keplerian-elements-resources/ There are no changes to this week's distribution. *[ANS thanks Joe Fitzgerald, KM1P, AMSAT Orbital Elements Manager, for the above information]* ------------------------------ *Need new satellite antennas? Purchase an M2 LEO-Pack from the **AMSAT Store! <https://amsat.org/product-category/hardware/>**When you purchase through **AMSAT, a portion of the proceeds goes towards **Keeping Amateur Radio in Space.* ------------------------------ 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. *Sailing Event, Moscow, Russia, direct via TBD* The ISS callsign is presently scheduled to be RSØISS The scheduled crewmember is Aleksandr Grebyonkin RZ3DSE The ARISS mentor is RV3DR Contact is go for: Sat 2024-09-21 16:25 UTC *Amur State University, Blagoveshchensk, Russia, direct via 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 2024-09-24 09:25 UTC *Tatarstan, Russia, direct via 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 Fri 2024-09-27 13:20 UTC As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol. 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. 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 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. Jim, *WU0I*, will be conducting a rove until Sep. 22. *Jim does NOT do X so if you need to set up a sked or whatever, please use the email address shown below. hams.at <https://hams.at/> *might be worth monitoring, but there was not direct mention of it in his email. *[ANS thanks Ian Parsons, K5ZM, AMSAT Rover Page Manager, for the above information]* ------------------------------ * Want to fly the colors on your own grid expedition?* Get an AMSAT car flag and other neat stuff from our Zazzle store <https://www.zazzle.com/store/amsat_gear>! 25% of the purchase price of each product goes towards Keeping Amateur Radio in Space ------------------------------ 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. AMSAT Ambassador Clint Bradford, K6LCS, says, "Think a 75-minute presentation on "working the easy satellites" would be appropriate for your club or event? 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 exact same show twice: EACH of the 150+ presentations so far has been customized/tailored to their audiences. Scheduled Events *Central Kentucky Hamfest**October 5, 2024* Lexington, KY AMSAT and Educational Satellites Forum and Information Table AI4SR and W4FCL *North Star Radio Convention**October 5, 2024* Hennepin Technical College (North Campus) Brooklyn Park, Minn. AMSAT Forum and Information Table KØJM and ADØHJ *Radio Society of Tucson* *October 5, 2024* Calvary Tucson Church 7811 E. Speedway Tucson, AZ https://k7rst.club/2024/07/tucson-autumn-ham-fest-2024/ N1UW *Pacificon 2024, ARRL Pacific Division Conference* *October 18-20, 2024* San Ramon, CA WU0I *2024 AMSAT Space Symposium and Annual General Meeting**October 25-27, 2024* Doubletree by Hilton Tampa Rocky Point Waterfront 3050 N Rocky Point Dr W Tampa, FL 33607 *Stone Mountain Hamfest, ARRL State Convention* *November 2-3, 2024* Stone Mountain, GA K4RGK *Oro Valley Amateur Radio Club* *November 9, 2024* Marana Middle School 11285 West Grier Rd. Marana, AZ 85653 https://www.tucsonhamradio.org/copy-of-hamfest-2022 N1UW *Yuma HAMCON* *February 20-22, 2025* Yuma, AZ N1UW *[ANS thanks Bo Lowrey, W4FCL, Director – AMSAT Ambassador Program, for the above information]* ------------------------------ Satellite Shorts from All Over + PLDSpace is currently offering student satellite launches at no cost. Information can be found at https://spark-program.pldspace.com/en/ (ANS thanks JoAnne, K9JKM, for the tip) + Congratulations to our newest GridMaster! Ryan, KI7QEK, earned award #71. (ANS thanks Bruce Paige, KK5DO, AMSAT Director of Contests & Awards for the information) + Another AMSAT VUCC/r (Reverse VUCC) award was also issued this past week. #17 goes to Leticia, LU5ILA. She has been very active roving in South America with 106 grids activated on satellite. (ANS thanks Bruce Paige, KK5DO, AMSAT Director of Contests & Awards for the information) + AMSAT's Operations team, in coordination with the University of Maine and AMSAT Engineering, continues to work to complete MESAT1's science mission. More telemetry coverage is needed! If you have UHF receive capability, please download FoxTelem <https://www.amsat.org/tlm/> and help us capture more data. (ANS thanks AMSAT for the 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.org for additional membership information. *73 and remember to help Keep Amateur Radio in Space!* *This week's ANS Editor,* *Paul Stoetzer, N8HM* *n8hm [at] arrl.net <http://arrl.net>* *ANS is a service of AMSAT, the Radio Amateur Satellite Corporation, 712 H Street NE, Suite 1653, Washington, DC 20002*

1 0

Upcoming ARISS Contact Schedule as of 2024-09-14 19:00 UTC
by aj9n＠aol.com 14 Sep '24

14 Sep '24

Upcoming ARISS Contact Schedule as of 2024-09-14 19:00 UTC Quick list of scheduled contacts and events: Instituto de Aplicação Fernando Rodrigues da Silveira (CAp-UERJ) and The State University of Rio de Janeiro (UERJ), Rio de Janeiro, Brazil, direct via PY1AX The ISS callsign is presently scheduled to be NA1SS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Sunita Williams KD5PLB The ARISS mentor is VE3TBD Contact was unsuccessful: Fri 2024-09-13 17:25:47 UTC 49 deg (***) ARISS is trying to determine what exactly happened. (***) Kordylewski Youth Astronomical Observatory in Niepołomice, Niepołomice, Poland, direct via SP9MOA The ISS callsign is presently scheduled to be OR4ISS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Sunita Williams KD5PLB The ARISS mentor is SP3QFE Contact is go for: Fri 2024-09-20 17:08:05 UTC 75 deg Questions have been updated. (***) Sailing Event, Moscow, Russia, direct via TBD The ISS callsign is presently scheduled to be RSØISS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Aleksandr Grebyonkin RZ3DSE The ARISS mentor is RV3DR Contact is go for: Sat 2024-09-21 16:25 UTC Amur State University, Blagoveshchensk, Russia, direct via TBD The ISS callsign is presently scheduled to be RSØISS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Ivan Vagner The ARISS mentor is RV3DR Contact is go for Tue 2024-09-24 09:25 UTC Tatarstan, Russia, direct via TBD The ISS callsign is presently scheduled to be RSØISS The downlink frequency is presently scheduled to be 145.800 MHz The latest information on the operation mode can be found at https://www.ariss.org/current-status-of-iss-stations.html The scheduled crewmember is Aleksey Ovchinin The ARISS mentor is RV3DR Contact is go for Fri 2024-09-27 13:20 UTC The crossband repeater continues to be active. 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. 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 2024-09-14 19:00 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. https://www.amsat.org/amsat/ariss/news/arissnews.rtf https://www.amsat.org/amsat/ariss/news/arissnews.txt The successful school list has been updated as of 2024-08-30 17:30 UTC. https://www.amsat.org/amsat/ariss/news/Successful_ARISS_schools.rtf ####################################################################################################################################### Comments on making general contacts I have been seeing a lot of traffic on Facebook and I suspect on other social media sites with people asking why they are not hearing the crew make general contacts. First off the crew is very busy on the ISS and they simply may not have the time to just pick up the microphone and talk. Also, one needs to be aware of their normal daily schedule. I have listed below the constraints that we at ARISS have to follow in order to schedule the school contacts. Hopefully this will help you better schedule your opportunities. Typical daily schedule Wakeup to Workday start= 1.5 hours Workday start to Workday end=12 hours Workday end to Sleep= 2 hours Sleep to wakeup= 8.5 hours The crew's usual waking period is 07:30 – 19:30 UTC. The most common times to find a crew member making casual periods are about one hour after waking up and about an hour before sleeping, when they have personal time. They're usually free most of the weekend, as well. SSTV events are not that often. So please check out https://www.ariss.org/ for the latest information or watch for the ARISS announcements. And don’t forget that the packet system is sometimes active. Check the status at https://www.ariss.org/ or http://www.issfanclub.eu to see if the packet system is active or not. As always, if there is an EVA, a docking, or an undocking; the ARISS radios are turned off as part of the safety protocol. 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 ######################################################################################################################################## A multi-point telebridge contact means that each student will be on the telebridge from their own home. **************************************************************************************************************************************** ARISS is very aware of the impact that COVID-19 is having on schools and the public in general. As such, we may have last minute cancellations or postponements of school contacts. As always, I will try to provide everyone with near-real-time updates. Watch for future COVID-19 related announcements at https://www.ariss.org/ The following schools have now been postponed or cancelled due to COVID-19: Postponed: No new schools Cancelled: No new schools **************************************************************************************************************************************** The ARISS webpage is at https://www.ariss.org/ Note that there are links to other ARISS websites from this site. The main page for Applying to Host a Scheduled Contact may be found at https://www.ariss.org/apply-to-host-an-ariss-contact.html +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ARISS Contact Applications (United States) Call for Proposals The next proposal window for US schools and educational organizations to host an Amateur Radio contact with a crew member on board the ISS opens July 8, 2024 for contacts to be scheduled for January 1, 2025 – June 30, 2025. This proposal window is due to ARISS by September 6, 2024 at 11:59 PM Pacific Time (Sept. 7, 2024, 06:59 UTC). (***) Proposal information and more details such as expectations, proposal guidelines and the proposal form can be found at www.ariss.org. An ARISS Introductory Webinar session will be held on July 22, 2024, at 7 PM ET (23:00 UTC). The Zoom link to sign up is: https://us06web.zoom.us/meeting/register/tZErf-ihrDktG9OphYxAjfz7nbONV0YcwY… Find more information and proposal instructions, visit the ARISS-USA website at: https://ariss-usa.org/hosting-an-ariss-contact-in-the-usa/ Please direct any questions to ariss.us.education(a)gmail.com. For future proposal information and more details such as expectations, proposal guidelines and proposal form, and dates and times of Information Webinars, go to www.ariss.org. About ARISS: 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 ISS National Lab and National Aeronautics and Space Administration (NASA). The primary goal of ARISS is to promote exploration of science, technology, engineering, and mathematics (STEAM) topics by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students in classrooms or public forms. Before and during these radio contacts, students, educators, parents, and communities learn about space, space technologies, and amateur radio. For more information, see www.ariss.org. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ ARISS Contact Applications (Europe, Africa and the Middle East) Schools and Youth organizations in Europe, Africa and the Middle East interested in setting up an ARISS radio contact with an astronaut on board the International Space Station are invited to submit an application from September to October and from February to April. Please refer to details and the application form at www.ariss-eu.org/school-contacts. Applications should be addressed by email to: school.selection.manager(a)ariss-eu.org ARISS Contact Applications (Canada, Central and South America, Asia and Australia and Russia) +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Organizations outside the United States can apply for an ARISS contact by filling out an application. Please direct questions to the appropriate regional representative listed below. If your country is not specifically listed, send your questions to the nearest ARISS Region listed. If you are unsure which address to use, please send your question to the ARISS-Canada representative; they will forward your question to the appropriate coordinator. For the application, go to: https://www.ariss.org/ariss-application.html. ARISS-Canada and the Americas, except USA: Steve McFarlane, VE3TBD email to: ve3tbd(a)gmail.com ARISS-Japan, Asia, Pacific and Australia: Satoshi Yasuda, 7M3TJZ email to: ariss(a)iaru-r3.org, Japan Amateur Radio League (JARL) https://www.jarl.org/ ARISS-Russia: Soyuz Radioljubitelei Rossii (SRR) https://srr.ru/ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 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(a)amsat.org or aj9n(a)aol.com. Listen for the ISS on the downlink of 145.8Ø MHz unless otherwise noted. ******************************************************************************* 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 https://www.ariss.org/ 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? Please note that the HamTV system is back on board but awaiting re-installation. Please monitor ARISS-EU or ARISS-ON for the very latest news on the troubleshooting efforts. If interested, then please go to the ARISS-EU website for complete details. Look for the buttons indicating Ham Video. http://www.ariss-eu.org/ If you need some assistance, ARISS mentor Kerry N6IZW, might be able to provide some insight. Contact Kerry at kbanke(a)sbcglobal.net The HamTV webpage: https://www.amsat-on.be/hamtv-summary/ **************************************************************************** ARISS congratulates the following mentors who have now mentored over 100 schools: Sergey RV3DR with 242 Francesco IKØWGF with 154 Satoshi 7M3TJZ with 153 Gaston ON4WF with 124 Steve VE3TBD with 121 Peter IN3GHZ with 120 **************************************************************************** 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. Total number of ARISS ISS to earth school events is 1764. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1655. Each contact may have multiple schools sharing the same time slot. Total number of ARISS supported terrestrial contacts is 48. Please feel free to contact me if more detailed statistics are needed. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ The following US states and entities have never had an ARISS contact: South Dakota, American Samoa, Guam, Northern Marianas Islands, and the Virgin Islands. ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ QSL information may be found at: https://www.ariss.org/qsl-cards.html ISS callsigns: DPØISS, FXØISS, GB1SS, IRØISS, NA1SS, OR4ISS, RSØISS **************************************************************************** Frequency chart for packet, voice, and crossband repeater modes showing Doppler correction as of 2005-07-29 04:00 UTC https://www.amsat.org/amsat/ariss/news/ISS_frequencies_and_Doppler_correcti… Check out the Zoho reports of the ARISS contacts https://reports.zoho.com/ZDBDataSheetView.cc?DBID=412218000000020415 **************************************************************************** Exp. 70 on orbit Oleg Kononenko Nikolay Chub Exp. 71 on orbit Tracy E. Caldwell Dyson SpaceX Crew-8 on orbit Matthew Dominick KCØTOR Mike Barratt KD5MIJ Jeanette Epps KF5QNU Aleksandr Grebyonkin RZ3DSE Boeing CFT on orbit Sunita Williams KD5PLB Barry Wilmore **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

1 0

Re: AO-73 question
by graham＠shirville.com 14 Sep '24

14 Sep '24

Hi John, I am not sure if you have received any other answer but… AO73 has been operating in full time 24/7 transponder on mode for some time now. The telemetry is also transmitted at low power at the same time on the nominal 145.935 MHz. The nominal transponder frequencies remain unchanged: Uplink: 435.150 – 435.130 MHz LSB (Inverting) Downlink: 145.950 – 145.970 MHz USB But these do drift a for Hz depending upon the on board temperature – back in the day, perhaps twelve years ago, the design of the oscillators was a compromise between stability and power consumption. JO97, being a more recent design, does not have this “feature”. 73 Graham G3VZV From: JOHN GEIGER via AMSAT-BB <amsat-bb(a)amsat.org> Sent: Friday, September 13, 2024 7:02 PM To: amsat-bb <amsat-bb(a)amsat.org> Subject: [AMSAT-BB] AO-73 question Great to see that AO-73 has been QRV again. I seem to remember seeing somewhere that it has shifted frequency somewhat from the published frequencies. Is this correct? What are the current uplink and downlink passbands for it? 73 John AF5CC Sent using {0}

1 0

AO-73 question
by JOHN GEIGER 13 Sep '24

13 Sep '24

Great to see that AO-73 has been QRV again. I seem to remember seeing somewhere that it has shifted frequency somewhat from the published frequencies. Is this correct? What are the current uplink and downlink passbands for it? 73 John AF5CC Sent using {0}

1 0

Re: Student requests help with a 70cm balloon borne antenna matching network
by Joe Fitzgerald 13 Sep '24

13 Sep '24

Simone, Thanks for the comments. Here is his GitHub project page: https://github.com/New-England-Weather-Balloon-Society/Tiny4FSK/ I have cc'ed Max W0MMX on this, I will let him answer you directly. de KM1P Joe

1 0

Re: Student requests help with a 70cm balloon borne antenna matching network
by Clint Bradford 13 Sep '24

13 Sep '24

Tom Medlin W5KUB has a lot of balloon experience. Sent from my iPad

1 0

FUNcube Data Warehouse Update
by g4dpz 12 Sep '24

12 Sep '24

Hi, All being well, the User Interface should be back online, late on Sunday. I am working on it while on holiday but uploading the new application is difficult with phone tethering! Our thanks for those who have uploaded data since the transition. 73 Dave, G4DPZ On behalf of the FUNcube Team +-------------------------+---------+ | site_id | score | +-------------------------+---------+ | HB9MFL | 1624665 | | KC0BMF | 1340244 | | VK5HI | 1180909 | | WA7FWF | 1140982 | | SP5ULN | 1052180 | | G4BIP | 1013258 | | TUDelft | 955837 | | VK5GU | 692467 | | Goonhilly_Earth_Station | 609119 | | f1grr | 455540 | | VA3ROM | 365560 | | DF7SC | 357148 | | VK2FRW | 309200 | | K4OZS | 304733 | | M7RED | 249672 | | n8mh | 184494 | | DL9DAK | 167273 | | kb6lty | 159710 | | EA4EKH | 75593 | | CU2JX | 47012 | | PA3WEG | 39913 | | n1miw | 21133 | | g4dpz | 19464 | | JJ1WTK | 4904 | | OH1NHW | 467 | | HS318 | 110 | +-------------------------+---------+

1 0

Re: Student requests help with a 70cm balloon borne antenna matching network
by Sasha Tim 12 Sep '24

12 Sep '24

Interested in this too, if there's anybody. On Thu, Sep 12, 2024 at 10:32 AM Joe Fitzgerald via AMSAT-BB < amsat-bb(a)amsat.org> wrote: > I am assisting a student building a 70cm transmitter for high altitude > balloons. He is concerned about losses in his matching network and is > asking questions past the the limit of my knowledge. Is there > anyone on the list that has experience designing and/or measuring losses > in PCB based matching networks with SMT lumped elements? > > Joe KM1P > > > > ----------------------------------------------------------- > > Sent via AMSAT-BB(a)amsat.org. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions > expressed > are solely those of the author, and do not reflect the official views of > AMSAT-NA. > Acceptable Use and Privacy Policies available at > https://www.amsat.org/about-amsat/ > > View archives of this mailing list at > https://mailman.amsat.org/hyperkitty/list/amsat-bb@amsat.org > To unsubscribe send an email to amsat-bb-leave(a)amsat.org > Manage all of your AMSAT-NA mailing list preferences at > https://mailman.amsat.org

1 0