Remember, there is a scheduled power-off of the Columbus Module ARISS radio today to support on-station maintenance.
Updated schedule for the cross-band voice repeater:
- Radio off around 13:30 UTC | 9:30 AM ET
- Radio on around 15:30 UTC | 11:30 AM ET
TVNZ's One News in New Zealand has a recap of Monday's ARISS STEM contact between Diamond Harbor school and Jack Hathaway on the ISS.
www.1news.co.nz/2026/04/22/s...
A split-panel promotional poster for an upcoming ARISS amateur radio contact. On the left, a NASA photograph shows ISS astronaut Chris Williams floating in microgravity inside the International Space Station, wearing a black polo shirt and beige cargo pants while speaking into a white ARISS radio handset. On the right, a dark blue panel with yellow and white text announces: 'Contact Upcoming' with the ASU Preparatory STEM Academy in Mesa, Arizona, USA. The event is scheduled for Thursday, 23 April at 16:52 UTC (12:52 PM ET / 9:52 AM MST local). ISS crew member Chris Williams, callsign KJ5GEW, will use NA1ISS. Ground station callsign is WB7TJD. Listeners can tune to 145.800 MHz FM and watch live at live.ARISS.org. A note states the cross-band voice repeater will be offline. The bottom right features the ARISS logo with Earth and the text 'Amateur Radio on the International Space Station.' The image is captioned as a NASA photo of Chris Williams using an ARISS radio during a 2026 contact.
Contact upcoming with Arizona!
Students at ASU Preparatory STEM Academy in Mesa will talk live via ham radio to Chris Williams on the ISS.
Scheduled Thu. 23 Apr at 16:52 UTC | 12:52 PM ET | 9:52 AM MST direct via WB7TJD.
Listen live on 145.800 MHz FM or watch the school live feed.
The HamTV version of today's contact with Sophie Adenot and the University of Bordeaux (IUT de Bordeaux), GEII department, Gradignan, France is now available on our ARISS YouTube Channel.
youtu.be/wVW5_8g8ywk
ISS Outage Schedule for the week of 20 April 2026. The poster shows an astronaut in a white spacesuit performing an EVA (spacewalk) on the International Space Station against the backdrop of Earth. On the right side, text details scheduled outages for the Columbus Module and Service Module radios, including cross-band voice repeater and APRS packet radio.Key schedule:Columbus Module & Service Module Radios (Cross-band voice repeater & APRS packet radio): Off Monday, 20 April at 10:15 UTC (6:15 AM ET), back on Tuesday, 21 April at 9:10 UTC (5:10 AM ET). Columbus Module Radio (Cross-band voice repeater): Off Wednesday, 22 April at 8:05 UTC (4:05 AM ET), back on the same day at 18:50 UTC (2:50 PM ET). The image includes the ARISS logo and notes that times are approximate and dependent on other spaceflight activities. It features a NASA 2009 photo of an astronaut installing a ham radio antenna during an EVA."
After two successful STEM contacts today, the cross-band voice repeater and service module packet radio are off for spaceflight activities.
Expect them to resume tomorrow (Tuesday) and then another outage for the voice repeater Wednesday.
There is no livestream planned for the Christchurch, New Zealand contact. Crew audio for that event can be heard on 145.800 MHz FM in Europe.
During this contact, Audio from the ISS can be heard on 145.800 MHz FM, watch the live stream from the school at live.ariss.org, or watch the HamTV feed from the station at live.ariss.org/hamtv.
Thanks to Sophie Adenot for the shout out on Instagram yesterday during World Amateur Radio Day!
www.instagram.com/p/DXR3Im4AmH...
ARISS This Week schedule for April 20-25 showing amateur radio contacts and outages on the International Space Station. Left side features a photo of the ISS with extended solar arrays and a partial SpaceX Dragon spacecraft. Right side lists events: Monday April 20 contacts with University of Bordeaux (France) and Diamond Harbour School (New Zealand), plus repeater outage; Tuesday April 21 outage ends; Wednesday April 22 cross-band repeater outage; Thursday April 23 contact with ASU Preparatory STEM Academy (Mesa, AZ). Includes ARISS logo and NASA photo credit from 2021."
Here's your ARISS week at a glance for April 20-25. Ham radio STEM contacts in Europe, New Zealand and USA are on the list, along with some repeater outages this week.
World Amateur Radio Day poster for April 18. The left side features a white radio tower icon with signal waves above the bold text 'WORLD AMATEUR RADIO DAY' and the date '18 APRIL' on a dark blue background with subtle signal patterns. The right side has a yellow header 'Advancing Through Innovation!' followed by text highlighting this year's theme and ARISS initiatives: SPARKI for classroom education, STAR (Space Telerobotics through Amateur Radio) for rover control simulation, and expanding beyond the ISS to commercial space, Lunar, and Mars opportunities. An ARISS logo with Earth and the text 'Amateur Radio on the International Space Station' appears in the bottom right.
It's World Amateur Radio Day and this year's theme is "Advancing the Spirit of Amateur Radio Through Innovation.”
We're excited for our part in the innovation of ham radio, and we're continuing to dream toward the future! Read more about ARISS at ARISS.org.
Split image with a NASA photo on the left and event details on the right. In the photo, ISS crew member Sophie Adenot floats in microgravity inside the station, wearing a black t-shirt with blonde hair floating upward. She smiles while holding a tablet. To her left, astronaut Chris Williams floats in a black polo shirt and beige pants, holding a white ring-shaped object. The ISS interior shows equipment, cables, and stickers. On the right, a dark blue panel with yellow and white text announces an amateur radio contact with University of Bordeaux in Gradignan, France on Monday, 20 April at 08:12 UTC (4:12 AM ET / 10:12 AM CEST). Sophie Adenot (KJ5LTN / OR4ISS) will speak with ground station F5KBW on 145.800 MHz FM. Live stream at live.ARISS.org. Cross-band repeater offline. Bottom note: NASA image of Sophie Adenot with Chris Williams during a recent ARISS contact. ARISS logo in bottom right.
Contact upcoming with France!
Students at University of Bordeaux, GEII department in Gradignan will talk live via ham radio with Sophie Adenot on the ISS.
Scheduled Mon. 20 Apr at 08:12 UTC | 4:12 AM ET |
10:12 AM CEST direct via F5KBW with HamTV planned.
Listen on 145.800 MHz FM.
Graphic showing astronaut Jack Hathaway in a blue NASA flight suit on the left, smiling. On the right, text announces an amateur radio contact between ISS crew member Jack Hathaway (callsign KJ5NIV / OR4ISS) and Diamond Harbour School in Christchurch, New Zealand. Event: Monday, 20 April at 09:51 UTC (5:51 AM ET / 9:51 PM NZST local). Ground station: IK1SLD. Frequency: 145.800 MHz FM. Cross-band repeater offline. Includes ARISS logo and NASA image caption."
Contact upcoming with New Zealand!
Students at Diamond Harbour School in Christchurch will talk live with Jack Hathaway on the ISS via ham radio.
Scheduled for Monday 20 April at 09:51 UTC | 5:51 AM ET | 9:51 PM NZST via IK1SLD telebridge.
Listen in Europe on 145.800 MHz.
ISS amateur radio outage schedule for the week of April 20, 2026. The graphic shows planned downtime for the Columbus Module and Service Module ham radios (cross-band voice repeater and APRS), with specific off/on times in UTC and ET. Left side features a photo of an astronaut installing an ISS ham radio antenna during a 2009 EVA.
Outages upcoming the early part of next week. The cross-band voice repeater will be off parts of Monday, Tuesday and Wednesday in support of spaceflight activities on the ISS.
HamTV is not expected to be impacted. Details in the graphic.
mage featuring NASA astronaut Jack Hathaway in a blue flight suit on the left, smiling toward the right. On the right side, a dark blue panel with text announcing an upcoming amateur radio contact with the ISS by Scouts Australia Western Branch in Mount Hawthorn, Western Australia. The event is scheduled for Friday, 17 April at 10:22 UTC (6:22 PM local AWST). ISS crew member Jack Hathaway, callsign KJ5NIV, will use NA1SS. Ground station callsign is AB1OC. Listen on 145.800 MHz FM. The cross-band voice repeater will be offline. Includes the ARISS logo and a note that it is a NASA image of Jack Hathaway during Crew-12 preflight activities at KSC."
Reminder: upcoming contact with Australia!
Scouts from Scouts Australia in Mount Hawthorn will talk live with Jack Hathaway on the ISS via ham radio.
Scheduled Friday at 10:22 UTC | 6:22 AM ET | 6:22 PM AWST via AB1OC telebridge.
Listen live on 145.800 MHz FM in US.
"Flyer with text on the left and a photograph on the right. The left side reads: 'Talk to an Astronaut on the Space Station from your school! U.S. Educators: Submit your proposal for a STEM ham radio contact with the ISS crew in 2027! Proposals are due May 22 for U.S. educational contacts scheduled between January and June 2027. Join our free webinar on Thursday, April 30 at 8 PM ET — get your questions answered on how to craft a winning proposal. Hams: Get involved! Tell your favorite teacher about this exciting free opportunity!' The ARISS logo appears at the bottom left.The right side shows a woman with brown hair holding a handheld microphone toward a young girl with light brown hair who is holding a paper with the NASA logo and speaking into the microphone. Below the photo: 'Tanya Anderson, KD9BQZ, helps a student ask a question during a school contact with the ISS crew.'
There are still spaces available for the US Webinar!
We're covering the best way to submit your proposal for your STEM group to make contact with the ISS crew LIVE via ham radio.
Visit: us06web.zoom.us/meeting/regi... to register for our talk on April 30.
We're surprised! Ops team confirms that because the Service Module radio was put into a unique configuration during the SSTV event some RS0ISS beacons sent on 145.825 and 437.550 MHz between images. Based on that the operations and engineering teams are going to go back and look at APRS plans.
Image featuring NASA astronaut Jack Hathaway in a blue flight suit on the left, smiling toward the right. On the right side, a dark blue panel with text announcing an upcoming amateur radio contact with the ISS by Scouts Australia Western Branch in Mount Hawthorn, Western Australia. The event is scheduled for Friday, 17 April at 10:22 UTC (6:22 PM local AWST). ISS crew member Jack Hathaway, callsign KJ5NIV, will use NA1SS. Ground station callsign is AB1OC. Listen on 145.800 MHz FM. The cross-band voice repeater will be offline. Includes the ARISS logo and a note that it is a NASA image of Jack Hathaway during Crew-12 preflight activities at KSC.
Contact upcoming with Australia!
Scouts from Scouts Australia in Mount Hawthorn will talk live with Jack Hathaway on the ISS via ham radio.
Scheduled for Friday, 17-April at 10:22 UTC | 6:22 AM ET | 6:22 PM AWST via AB1OC telebridge.
Listen live on 145.800 MHz FM in US.
Graphic announcing the wrap-up of SSTV Series 31, a World Space Commemoration event from the ISS. Left column shows three historical panels:45th Anniversary of First Space Shuttle Flight with photo of STS-1 Columbia landing on April 14. 100 Year Anniversary of First Liquid Fuel Flight featuring portraits of Konstantin Tsiolkovsky and Robert Goddard. 20th Anniversary of Suitsat-1/Radioskaf with image of the satellite being deployed from the ISS. Right side on dark blue background states:3,600+ images received so far. More than 40% of participants are educators or students. Submit images by Friday, April 17 at 23:59 UTC (7:59 PM ET) at https://ariss-usa.org/ARISS_SSTV for an event certificate. Allow several days for email delivery of certificates. Bottom right features the ARISS logo. Early Series 31 images credited to N2YZH, VU2KEA, and G4DCQ.
ARISS Series 31 has one more pass to go, transmissions should wrap up around 13:55 UTC | 9:55 AM ET.
Don't forget to submit for your certificate. Upload at least one original decode to ariss-usa.org/ARISS_SSTV/ before late Friday to get in on the award.
Thanks @arissintl.bsky.social and all involved in the ISS SSTV event. Was hoping for a chance to improve some of the images but unless I can get something out of tomorrow morning's horizon scraper I will settle for what you see here. Received in Vancouver.
@ve7sar.bsky.social
No APRS test planned, but you're not the only one who has reported this. The Ops team is looking into it.
This is the first time with this configuration. We'll pass on the feedback to the SSTV team.
Infographic for ARISS SSTV Series 31: Mid-event status for the World Space Commemoration series. Left column features three historical space anniversary images: STS-1 Space Shuttle Columbia landing (45th anniversary), portraits of Konstantin Tsiolkovsky and Robert Goddard (100th anniversary of first liquid fuel flight), and the Suitsat-1/Radioskaf satellite deployment (20th anniversary). Right column on dark blue background details the event: continues until Tuesday 14 April 13:55 UTC, frequency 437.55 MHz, ARISS 10W transmit power, Robot 36 SSTV mode, 36 sec on / 2 min off schedule. Includes submission link for certificates and credits early image captures by N2YZH, VU2KEA, and G4DCQ. ARISS logo at bottom right.
We're about halfway through SSTV Series 31 - just over 50 hours left to catch images. So far more than 1,500 captures have been submitted!
If you are struggling with Doppler shift, there is a spreadsheet on the FAQ page at ariss-usa.org/ARISS_SSTV/ that can help you out.
Quick notes about reports of "ISS-APRS" on 145.825 MHz. It's not us!
A satellite has recently started offering APRS on that frequency. Our APRS radio is currently busy doing the SSTV event.
When the event is over, we plan to bring APRS back on a 70 CM frequency. More when finalized.
Artemis II Orion spacecraft descending under two large red-and-white striped parachutes toward a splashdown in the blue ocean. On the right, a dark blue panel with yellow text reads: 'Welcome Home! Congratulations to the Artemis II teams around the world!' The text thanks ARISS teams and fans for following the 10-day mission, highlights AREx ground stations (a joint ARISS/AMSAT initiative) that passively tracked Orion and fed telemetry to NASA SCaN, and notes that NASA will study the data to advance future space communications. More details at ariss.org. NASA / Josh Valcarce image: Artemis II splashdown on April 10, 2026.
Welcome home to the Artemis II crew! Our AREx teams have been tracking you all the way to the moon and back. Read more about AREx's work at ARISS.org.
HamTV will be offline parts of Monday and Tuesday to allow for spaceflight activities on station.
Power down: Mon. Apr. 13 around 09:10 UTC | 5:10 AM ET
Power Restored: Tue. Apr. 14 around 14:50 UTC: 10 50 AM ET
Informational poster for an upcoming ARISS amateur radio contact with the International Space Station. On the left, NASA astronaut Chris Williams, wearing a black polo shirt and beige cargo pants, is floating inside the ISS while holding a white ARISS radio microphone and a tablet. On the right, a dark blue panel with yellow and white text announces a direct school contact on Monday, 13 April at 08:55 UTC with Elementary School 'Slava Raskaj' in Ozalj, Croatia. The poster details the ISS crew member using callsign OR4ISS, the ground station callsign 9A1CUA, the frequency 145.800 MHz FM, and notes that the contact will be livestreamed on YouTube. An ARISS logo appears at the bottom right.
Contact upcoming with Croatia!
Students at Elementary School “Slava Raskaj” in Ozalj will talk with Chris Williams on the ISS live via ham radio.
Scheduled Mon. 13 April at 08:55 UTC | 4:55 AM ET | 10:55 AM CEST direct via 9A1CUA.
Listen live on 145.800 MHz, watch on YouTube.
We're about 1 hour away from the planned start of SSTV Series 31, "World Space Commemoration." Remember, these transmissions will be on 437.550 MHz +/- Doppler shift.
On the ariss-usa.org/ARISS_SSTV/ page where you submit your images, click "FAQ" for some Doppler shift tips!
Flyer for the 2026 U.S. proposal window to Talk to an Astronaut on the International Space Station from your school. The left text panel invites U.S. educators to submit proposals for a STEM ham radio contact with the ISS crew in 2027. Proposals are due May 22 for educational contacts scheduled January–June 2027. A free webinar is offered on Thursday, April 30 at 8 PM ET to help craft winning proposals. The ARISS logo is at the bottom left.On the right, a photo shows Tanya Anderson, KD9BQZ, holding a golden microphone for a young girl with light brown hair in a white shirt. The girl holds a paper with the ARISS logo and appears to be speaking. Caption: 'Tanya Anderson, KD9BQZ, helps a student ask a question during a school contact with the ISS crew.
There have been some great contacts with the crew this week, and US STEM educational groups can get in on the fun.
It all starts with a proposal! Join us on Thu. April 30 to find out how easy it is! Details and registration info for our Zoom event are at: ariss-usa.org/proposal-ove...
![[ARISS] Écoute Sophie Adenot (OR4ISS) avec F6KVJ le 09/04/2026 - Station sol ISAE Supaéro (F6KTA)](https://cdn.bsky.app/img/feed_thumbnail/plain/did:plc:tn6eq7wsr2vqwncnwqwt35lr/bafkreifhs2d4t32fg2kywqknzevywfdofxmrrns3xc4ayijmamhu3drdfi)
En attendant le contact de tout à l'heure avec Paris Saclay, on a enregistré celui avec le lycée du Vimeu à 12h27 ! 📡
@cnes.fr @arissintl.bsky.social
The vehicle activities are being rescheduled, so the power off will now be at a later date. We'll update when we have confirmed times.