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

Re: Doppler shift
by Peter 29 Apr '24

29 Apr '24

Yes, there actually is. Well, you will have to do some work as well in order to make it work. You can buy a TYT MD UV380 or the Retevis RT-3S (both are the same radio under different names) with or without GPS but I would recommend the GPS included models. Now comes the part where you have to do some work. You will have to install a different Firmware on the radio, called OpenGD77. Here is the relevant website with all download links and step-by-step instructions to install the Firmware: https://www.opengd77.com/viewtopic.php?f=19&t=2380 After the Firmware is installed you will be able to use the build in satellite feature which includes automatic frequency shift for the selected satellite. It also offers build in satellite tracking. Good luck Peter KC3UEP Sent with [Proton Mail](https://proton.me/) secure email. On Monday, 29 April 2024 at 1:45 PM, samuel galet via AMSAT-BB <amsat-bb(a)amsat.org> wrote: > I once read there was a rare handi that automatically corrected for the doppler shift during a satellite pass. Does anyone remember the radio and what was it'd name. > > Many thanks. > > 73 de VE2LJV Samuel Galet > > Sent from my Galaxy

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Re: Doppler shift
by Ignacio Granados Vega 29 Apr '24

29 Apr '24

I don't know of any brand from a few years ago, if there is someone will know, if we come back to the present day the Baofeng DM1701 and the Retevis RT3S can perform Doppler change with a free firmware called OpenGD77 https://www.youtube.com/watch?v=UUWXI47oLr8 Ignacio - TI3IES El lun, 29 abr 2024 a las 11:44, samuel galet via AMSAT-BB (< amsat-bb(a)amsat.org>) escribió: > I once read there was a rare handi that automatically corrected for the > doppler shift during a satellite pass. Does anyone remember the radio and > what was it'd name. > > Many thanks. > > 73 de VE2LJV Samuel Galet > > > > Sent from my Galaxy > > > ----------------------------------------------------------- > > 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/[email protected] > 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 -- ========================================== *Ignacio Granados Vega - TI3IES* Cartago, Costa Rica ========================================== *Cuidemos el medio ambiente. Por favor no imprima este correo si no es necesario.*

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Re: Doppler shift
by Adrian Engele 29 Apr '24

29 Apr '24

Never heard of such a beast. You did not mention if this was for FM satellites, which I think is the case or linear satellites.FM satellites you can usually store 5 frequency pairs, where VHF stays the same and UHF will change according to AOS, TCA, LOS. Linear satellites require some tuning even if you decide to operate with only one radio (Not recommended). These sats require dual radios to work properly. 73, Adrian AA5UK On Monday, April 29, 2024 at 12:44:35 PM CDT, samuel galet via AMSAT-BB <amsat-bb(a)amsat.org> wrote: I once read there was a rare handi that automatically corrected for the doppler shift during a satellite pass. Does anyone remember the radio and what was it'd name. Many thanks. 73 de VE2LJV Samuel Galet Sent from my Galaxy ----------------------------------------------------------- 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/[email protected] 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

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Doppler shift
by samuel galet 29 Apr '24

29 Apr '24

I once read there was a rare handi that automatically corrected for the doppler shift during a satellite pass. Does anyone remember the radio and what was it'd name. Many thanks. 73 de VE2LJV Samuel Galet Sent from my Galaxy

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Upcoming ARISS Contact Schedule as of 2024-04-29 17:00 UTC
by aj9n＠aol.com 29 Apr '24

29 Apr '24

Upcoming ARISS Contact Schedule as of 2024-04-29 17:00 UTC Quick list of scheduled contacts and events: Centennial Campus Magnet Middle School Center for Innovation, Raleigh, NC, telebridge via K6DUE 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 Matthew Dominick KCØTOR The ARISS mentor is AA6TB Contact is go for: Wed 2024-05-01 12:03:49 UTC 76 deg Watch for Livestream at: https://youtube.com/live/4ZU7I208cw4 Wireless Institute of Australia / Bundaberg High School Amateur Radio Club, Bundaberg, Queensland, Australia, telebridge via VK6MJ 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 Mike Barratt KD5MIJ The ARISS mentor is VK4KHZ Contact is go for: Sat 2024-05-04 10:28:24 UTC 51 deg Eric Knows CIC, Newcastle upon Tyne, United Kingdom, telebridge via K6DUE (***) 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 Matthew Dominick KCØTOR (***) The ARISS mentor is MØXTD Contact is go for: Sat 2024-05-11 08:42:32 UTC 48 deg (***) 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 April 8, 2024 for contacts to be scheduled for January 1, 2025 – June 30, 2025. This proposal window is due to ARISS by May 19, 2024 at 11:59 PM Pacific Time. (***) 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 2024-04-29 17:00 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 2024-04-23 04:00 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 April 8, 2024 for contacts to be scheduled for January 1, 2025 – June 30, 2025. This proposal window is due to ARISS by May 19, 2024 at 11:59 PM Pacific Time. (***) Proposal information and more details such as expectations, proposal guidelines and the proposal form can be found at www.ariss.org. 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 233 Francesco IKØWGF with 154 Satoshi 7M3TJZ with 150 Gaston ON4WF with 124 Peter IN3GHZ with 118 Steve VE3TBD with 106 **************************************************************************** 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 1719. Each school counts as 1 event. Total number of ARISS ISS to earth school contacts is 1624. 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 **************************************************************************** 73, Charlie Sufana AJ9N One of the ARISS operation team mentors

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ANS-119 AMSAT News Service Weekly Bulletins
by Paul Stoetzer 28 Apr '24

28 Apr '24

*AMSAT *News Service*ANS-119* *April 28, 2024* In this edition: - AO-109 Re-enters - AMSAT at Hamvention - Robusta-3A With Store & Forward Repeater Scheduled for Launch - Changes to AMSAT-NA TLE Distribution for April 26, 2024 - ARISS News - Upcoming Satellite Operations - Hamfests, Conventions, Maker Faires, and Other Events - 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/ ------------------------------ AO-109 Re-enters AO-109's orbit decayed on or about April 21, 2024 after just over three years in space. Launched on January 17, 2021, as part of the ELaNa 20 mission using a LauncherOne rocket operated by Virgin Orbit, AO-109, known prior to launch as RadFxSat-2 / Fox-1E, was carried aloft by a modified Boeing 747 named "Cosmic Girl" from the Mojave Air and Space Port in California, United States. After reaching an altitude of approximately 35,000 feet (11,000 meters), the rocket was released into space. This launch, conducted under NASA's CubeSat Launch Initiative program, marked the beginning of the satellite's mission to facilitate amateur radio communications and technology research. A video of the launch can be seen on YouTube. <https://www.youtube.com/watch?v=A9FqI2ukheY> AO-109 represented the fifth iteration of the "Fox" 1U amateur radio satellites series developed by AMSAT, featuring a 30KHz linear transponder radio. After launch, AMSAT's Engineering and Operations teams listened for the expected beacon signal, but nothing was initially heard. On January 27, 2021, Brad Schumacher, W5SAT, was able to hear his weak CW signals relayed through the satellite's transponder. This was confirmed by AMSAT Engineering and Operations the next day and the satellite was designated AMSAT-OSCAR 109. Continued monitoring confirmed that the satellite was operating properly, but with an extremely low signal output. It is likely that the satellite's final power amplifier transistor failed, limiting power output to just 8 mW. Although the signal was extremely weak, the satellite was able to support QSOs by CW, FT4/8, and even SSB. Five amateur stations successfully copied the weak telemetry signal from the satellite and provided valuable data about the health of the satellite: the PI9CAM radio telescope in Dwingeloo, Netherlands, provided the bulk of the data from the satellite. WA7FWF, W7KKE, K8DP, and the AMSAT Operations team also copied telemetry. Upon being declared operational and open for amateur use, despite the limitation of its low power output, on July 20, 2021, AO-109 embarked on a mission to serve both amateur radio and technology research objectives. The final telemetry data was received on April 5, 2024 from PI9CAM and revealed that the satellite had achieved a remarkable milestone: AO-109 had set a new Fox-1 program record for processor uptime. This information was gathered by Alan Biddle, WA4SCA, who has meticulously monitored telemetry reports on a daily basis and calculated the duration of each reset, allowing for precise correlation of telemetry frames with UTC time. The Fox satellites are designed to undergo onboard computer resets triggered by factors like radiation exposure and low battery voltage. Time on these satellites is measured by counting resets plus the duration since the last reset. It is common for the Fox satellites to reset every few days or weeks, especially when passing over the South Atlantic Anomaly. However, the processor on AO-109 ran continuously from September 2023 until at least April 5, 2024, accumulating over 18 million seconds of uptime—far surpassing any other Fox satellite. Among its key payloads was the RadFx-2 experiment, a collaboration with Vanderbilt University, aimed at studying the effects of space radiation on specific SRAM types. Consistent with the Fox-1A design blueprint, AO-109 was equipped with a 2-meter whip antenna and a 70 cm whip antenna. The linear transponder module developed for AO-109 also evolved into a program to equip other CubeSats with linear transponders. Evolutions of this transponder previously flew aboard HO-107 (HuskySat-1) and the next one is scheduled to fly aboard MESAT-1 later this year. AMSAT's GOLF program will also carry this linear transponder module for VHF/UHF communications. *[ANS thanks AMSAT Operations and Engineering for the above information]* ------------------------------ AMSAT at Hamvention Hamvention is just weeks away at the Greene County Fairgrounds in Xenia, OH May 17-19, 2024! AMSAT will have our usual robust presence and after-hours activities. *Volunteer at the AMSAT Booth - (Building 1, 1007-1010 & 1107-1110)* AMSAT is actively seeking volunteers to assist with booth activities and invites enthusiasts to dedicate their time. Last year, around 20 volunteers played crucial roles in fostering meaningful interactions with attendees. Volunteers, whether able to commit a few hours or the entire weekend, are warmly encouraged to participate. Aligned with this year's theme of "Expanding our Community," AMSAT aims to strengthen its presence by recruiting new members and volunteers. For those eager to be part of AMSAT's presence at Dayton Hamvention or request more information about volunteering, Phil Smith, W1EME, AMSAT Hamvention Team Leader, serves as the point of contact. To volunteer or inquire further, individuals can reach out to Phil via email at w1eme [at] amsat.org. Your involvement not only enriches the event but also contributes to the vibrant amateur radio community. *AMSAT Forum - Saturday, May 18th * The AMSAT Forum will take place in Forum Room 2 at 1:20pm - 2:50pm on Saturday, May 18th. This will immediately follow the ARISS Forum in the same room at 12:10pm, so get there early and see both presentations! *AMSAT Dinner at Tickets - Thursday, May 16th* The annual AMSAT “Dinner at Tickets” party will be held at Tickets Pub & Eatery on Thursday, May 16th from 6:00 PM to 8:00 PM EDT. There is no program or speaker – just good conversation. Everyone is invited regardless of whether or not they helped with setup or plan to work in the booth. Tickets has a great selection of Greek and American food and great company! Food can be ordered from the menu; drinks (beer, wine, sodas and iced tea) are available at the bar. Come as you are; no reservations required. Bring some friends and have a great time the night before Hamvention. Tickets Pub & Eatery is located at 7 W. Main St, Fairborn, OH 45324. (Telephone (937) 878-9022) *AMSAT/TAPR Banquet - Friday, May 17th* The 15th annual AMSAT/TAPR Banquet will be held at the Kohler Presidential Banquet Center on Friday, May 17th at 18:30 EDT. This dinner is always a highlight of the TAPR (Tucson Amateur Packet Radio) and AMSAT (Radio Amateur Satellite Corp.) activities during the Dayton Hamvention. This year’s banquet speaker will be Bill Reed, NX5R, AMSAT PACSAT Project Manager, who will highlight the forthcoming PACSAT digital communications payload. The Kohler Presidential Banquet Center is located at 4548 Presidential Way, Kettering, Ohio – about 20 minutes away from the Greene County Fairgrounds. Tickets ($60 each) may be purchased from the AMSAT store <https://www.amsat.org/product/2024-amsat-tapr-friday-night-banquet-registra…>. The banquet ticket purchase deadline is Friday, May 10th. Banquet tickets must be purchased in advance and will not be sold at the AMSAT booth. There will be no tickets to pick up at the AMSAT booth. Tickets purchased on-line will be maintained on a list with check-in at the door at the banquet center. Seating is limited to the number of meals reserved with the Kohler caterers based on the number of tickets sold by the deadline. *[ANS thanks the AMSAT Hamvention Team for the above information]* ------------------------------ Robusta-3A With Store & Forward Repeater Scheduled for Launch Robusta-3A is a 3U CubeSat with multiple mission 1) Amateur: Store & forward repeater, refer to 5.5 paragraph for more details. 2) Educational: No less than 300 students participated in the development of the platform. As part of their training, a module is allocated to the initiation to amateur radio. In addition, we pass the license to around ten students each year with the ANFR (French administration) and 3 new operators at CSUM. 3) Technical validation mission: An S-band transmitter is on board operating in commercial band for test purposes. This payload will not be controlled by the amateur radio band. The HAM radio messaging system provides a message-exchanging service between amateur radio users using Robusta satellite missions as relays. The main purpose of the system is to enable HAM radio operators to send and receive messages from anywhere in the world without having a direct (end-to-end) connection between them. The messaging system uses a method called ‘store and forward’ to provide this service. Messages are transported to the relay station (satellite) by a radio link, and from one geographical location to another, by the satellite orbital movement. A user sends a message to the satellite during a pass and the message is stored in the satellite’s memory. The satellite then moves on its orbit, making the stored message available for other HAM radio operators. Users can request messages to the satellite which, in turn will check if there are any stored messages available for that particular operator. Finally, the message is transmitted and it arrives at its destination A UHF downlink using 9k6 GMSK with AX25 is proposed. Launch is planned on the Ariane 6 maiden flight from Kourou, French Guiana into a 580 km circular 96 degree orbit together with GRBBEta and ISTSAT. More info at https://csum.umontpellier.fr/en/nanosatellites-projects-our-3u-projects/ *[ANS thanks the IARU for the above information]* ------------------------------ *The 2024 Coins Are Here Now!Help Support GOLF and Fox Plus.**Join <https://www.amsat.org/join-the-amsat-presidents-club/> the AMSAT President’s Club today!* ------------------------------ Changes to AMSAT-NA TLE Distribution for April 26, 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/ The following satellite has been added to this week's AMSAT-NA TLE distribution: KASHIWA NORAD Cat ID 59508 Downlink 437.3794 MHz The following satellite has been removed from this week's AMSAT-NA TLE distribution: AO-109 NORAD Cat ID 47311 Decayed from orbit on or about 21 April 2024 *[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. *Centennial Campus Magnet Middle School Center for Innovation, Raleigh, NC, telebridge via K6DUE* The ISS callsign is presently scheduled to be NA1SS The scheduled crewmember is Matthew Dominick KCØTOR The ARISS mentor is AA6TB Contact is go for: Wed 2024-05-01 12:03:49 UTC 76 deg Watch for Livestream at: https://youtube.com/live/4ZU7I208cw4 *Wireless Institute of Australia / Bundaberg High School Amateur Radio Club, Bundaberg, Queensland, Australia, telebridge via VK6MJ* The ISS callsign is presently scheduled to be NA1SS The scheduled crewmember is Mike Barratt KD5MIJ The ARISS mentor is VK4KHZ Contact is go for: Sat 2024-05-04 10:28:24 UTC 51 deg 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 OperationsQuick Hits: None Major Roves: K6VHF will be active on IO-117 as HR9/K6VHF from EK66 Roatan, Honduras [image: 🇭🇳] during Apr, 25th - Apr, 30th time frame. Also will be active on HF 160m-10m included 6m band mostly in FT8 as K6VHF/HR9 SO2R station. Since internet will be available the IO-117 UHM protocol be engaged. Do not call again if signal already was received. If you already worked HR9/K6VHF please sit and relax, allowing others to work new DXCC/VUCC. *[ANS thanks Ian Parsons, K5ZM, AMSAT Rover Page Manager, and Alex Ners, K6VHF, 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 ------------------------------ Hamfests, Conventions, Maker Faires, and Other Events 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, "Two “different” audiences last week invited me to speak. The Mount Baker Amateur Radio Club in Bellingham, WA, was a ham club - and we had a great time." "But the Orange County (CA) Astronomers Club was a little, well, different. But there was plenty of “crossover” interests: space photography, studies of our planets … so it wasn’t a 100-percent “ham” audience. But I edited and came up with a presentation they said they enjoyed!" "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 *Dayton Hamvention 2024* Friday May 17th through Sunday May 19th, 2024 Greene County Fairgrounds and Expo Center 120 Fairground Road Xenia, OH 45385 https://hamvention.org *[ANS thanks Clint Bradford, K6LCS, and AMSAT for the above information]* ------------------------------ Satellite Shorts from All Over + David Bowman, G0MRF, and Graham Shirville, G3VZV, will travel to St. Johns, Newfoundland May 15-19, 2024 in an attempt to operate QO-100 from below the horizon and claim trophies sponsored by AMSAT-UK and the British Amateur Television Club for the first QO-100 QSOs from North America. AMSAT-UK and BATC posed the challenge <https://amsat-uk.org/2022/11/01/making-qo-100-contacts-from-north-america-a…> in 2022. The trophies have so far gone unclaimed, though successful below horizon operation on QO-100 has occurred from Indonesia. (ANS thanks David Bowman, G0MRF, for the above information) + Members of the AMSAT Engineering team attended the CubeSat Developer's Workshop in San Luis Obispo, CA this past week. The workshop offered an opportunity for AMSAT Engineers to network with other CubeSat developers and learn about the most recent developments in space technology as applied to CubeSats. + The U.S. space agency says its Voyager-1 probe is once again sending usable information back to Earth after months of spouting gibberish. The 46-year-old NASA spacecraft is humanity's most distant object. A computer fault stopped it returning readable data in November but engineers have now fixed this. For the moment, Voyager is sending back only health data about its onboard systems, but further work should get the scientific instruments back online. Voyager-1 is more than 24 billion km (15 billion miles) away, so distant, its radio messages take a full 22.5 hours to reach us. (ANS thanks BBC News for the above information.) + In Colorado Springs, Colorado, students at the Thrive Home School Academy <https://www.thrivehsa.org/> (THSA), along with students at Stratton Meadows Elementary (SME), were able to have a space chat with NASA astronaut and mission specialist Jeanette "Jo" Epps, KF5QNU, on board the International Space Station (ISS) on April 22, 2024. At the time of the contact Epps, a member of the SpaceX Crew-8 mission, was on her 47th day of the 180-day mission. (ANS thanks the ARRL Letter <http://www.arrl.org/arrlletter?issue=2024-04-25> 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.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] amsat.org <http://amsat.org>* *ANS is a service of AMSAT, the Radio Amateur Satellite Corporation, 712 H Street NE, Suite 1653, Washington, DC 20002*

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ARISS News Release No. 24-27
by David Jordan 27 Apr '24

27 Apr '24

ARISS News Release No. 24-27 DaveJordan, AA4KN ARISS PR aa4kn(a)amsat.org FORIMMEDIATE RELEASE ARISSContact is Scheduled with Students at Centennial Campus Magnet Middle School Center forInnovation, Raleigh, North Carolina, USA April 27, 2024—AmateurRadio on the International Space Station (ARISS) has received scheduleconfirmation for an ARISS radio contact between an astronaut aboard theInternational Space Station (ISS) and students at the Centennial Campus MagnetMiddle School Center for Innovation located in Raleigh, NC. ARISS conducts 60-100 of these specialamateur radio contacts each year between students around the globe and crewmembers with ham radio licenses aboard the ISS. CentennialCampus Center for Innovation Magnet Middle School is a 6th through 8th gradepublic school serving approximately 470 students. As a Center for Innovation, students workwith STEM learning and the Design Thinking process to develop those skill setsand characteristics of an Innovator and thus are preparing for careers not yetimagined. In anticipation of this ARISS contact, students have learned aboutthe ISS and have taken a virtual tour of the ISS. Students have also participatedin various design thinking challenges, including designing a moon lander - ashock absorbing system that will protect two astronauts (marshmallows) whenlanding on the moon (dropped from a height). This will be atelebridge Contact via AmateurRadio allowing students toask their questions of astronaut Matthew Dominick, amateur radio call sign KCØTOR.The downlink frequency for this contact is 145.800 MHz and may be heard bylisteners that are within the ISS-footprint that also encompasses thetelebridge station. The ARISS amateur radio ground station (telebridge station)for this contact is in Greenbelt, Maryland, U.S. The amateur radio volunteerteam at the ground station will use the callsign K6DUE, to establish andmaintain the ISS connection. The ARISS radiocontact is scheduled for May 1, 2024 at 8:03:49 am EDT (NC) (12:03:49 UTC, 7:03am CDT, 6:03 am MDT, 5:03 am PDT). The public isinvited to watch the live stream at: https://youtube.com/live/4ZU7I208cw4 _______________________________ As time allows,students will ask these questions: 1. What is thelimit for how long someone can stay in space? How long have you been in space? 2. What is thebiggest challenge you face in your daily life aboard the ISS? 3. What doescollaboration with your fellow crew members look like on board the ISS? 4. What is thehardest part about being an astronaut, and how to you maintain a positiveattitude? 5. How does itfeel when you come back down to earth? Does it feel weird because of thedifference of gravity? 6. How manyyears did you have to study to become an astronaut and what do you study? 7. When do youuse resilience on your job? How do you stay motivated when working on difficulttasks? 8. Could you see the eclipse from the ISS? Whatother space events can you see from the ISS (like the eclipse) that we may nothave thought about? 9. We focus onthe Design Thinking process to solve problems. What process do you use to solveproblems? 10. How longdid it take you to feel like you were at home? Or what would make you feel moreat home? 11. What issome advice you would give to students willing to follow your career path? 12. What is anunderrated/not really known part of your job? 13. What typeof science projects are you working on? 14. Have youever worked with others in the station on a collaborative project? If so, howdid you collaborate as a team? 15. How doastronauts prepare for a journey to space? 16. How do youprepare for emergencies on the ISS? For example, do you have fire drills? 17. What foodsare you able to grow in space? 18. How often do you work with astronauts fromother countries? Can you describe what that is like and what challenges you mayface? 19. Have youever had any ventilation problems on the ISS, if so what did you do to fix it? 20. What wasthe process you went through to adjust to zero gravity? How does that feel? About ARISS: Amateur Radio on the International Space Station (ARISS) isa cooperative venture of international amateur radio societies and the spaceagencies that support the ISS. In the United States, sponsors are the AmericanRadio Relay League (ARRL), Amateur Radio Digital Communications (ARDC), RadioAmateur Satellite Corporation (AMSAT), NASA’s Space Communications andNavigation program (SCaN) and the ISS National Lab—Space Station Explorers. Theprimary goal of ARISS is to promote exploration of science, technology,engineering, the arts, and mathematics topics. ARISS does this by organizingscheduled contacts via amateur radio between crew members aboard the ISS andstudents. Before and during these radio contacts, students, educators, parents,and communities take part in hands-on learning activities tied to space, spacetechnologies, and amateur radio. For more information, see http://www.ariss.org . Media Contact: Dave Jordan,AA4KN ARISS PR Find us onsocial media at: X: ARISS_Intl Facebook:facebook.com/ARISSIntl Instagram:ariss_intl Mastodon:[email protected] Check out ARISSon Youtube.com.

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TEVEL-2
by david.greenberg 27 Apr '24

27 Apr '24

Hello All, TEVEL-2 FM transponder has been activated, starting from today 27.04.24 19:04U for 72 hours.73,David 4X1DGנשלח מה-Galaxy שלי

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TEVEL-7
by david.greenberg 26 Apr '24

26 Apr '24

נשלח מה-Galaxy שליHello All, TEVEL-7 FM transponder has been activated, starting from today 26.04.24 20:32U for 72 hours.73,David 4X1DG

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TEVEL-7
by david.greenberg 26 Apr '24

26 Apr '24

Hello All, TEVEL-7 FM transponder has been activated, starting from today 26.04.24 20:23U for 72 hours.73,David 4X1DGנשלח מה-Galaxy שלי

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