ARISS - Amateur Radio on the International Space Station

Reminder, the APRS trial from the ISS Service Module, active on 437.825 MHz, is expected to end sometime today.

Please pass on any reception reports from the event so teams can evaluate future activities.

Graphic announcing an upcoming amateur radio contact between ISS astronaut Jack Hathaway (KJ5NIV / NA1SS) and students at St Joseph's Primary School in Bombala, NSW, Australia. Scheduled for Thursday, 5 March at 7:53 PM AEDT (08:53 UTC). Listen on 145.800 MHz FM. Features a photo of Jack in his blue NASA flight suit.

Contact upcoming with Australia!

Students at St Joseph’s Primary School in Bombala NSW will talk with Jack Hathaway, KJ5NIV, live via ham radio.

Scheduled Thu. 05-Mar at 08:53 UTC | 3:53 AM ET | 7:53 PM AEDT via VK6MJ telebridge.

Listen on 145.800 MHz FM.

Find out more about ARISS-USA's programs for educators this week.

Tanya Anderson, our Director of Education will join the 3-D Thursday's webinar this month!

More information at: www.linkedin.com/posts/dan-va...

A YouTube live stream has been added for Monday's event with Sophie Adenot. You can watch at: www.youtube.com/live/5mA2Opp...

Our graphic contains a typo. Correct date for the contact is Monday, 02-Mar.

To join the discussion on our Discord, visit: discord.gg/46jm6ggu

Photo of a Kenwood TH-D75 handheld radio display showing the APRS Station List with RS0ISS (ARISS International Space Station) beacon received on 437.825 MHz, dated 02/26, alongside a compass rose indicating direction, temperature -32°, altitude 57271 mi, and menu options. Right side features a blue and orange graphic titled 'APRS Update' with the ARISS logo. Text from Frank Bauer, KA3HDO, ARISS International Chair (via ARISS Discord): Troubleshooting earlier this week by the Russian team indicates that the 2 meter portion of the radio may not be usable. That is not a final conclusion, but a preliminary indication. We still don't fully know what the radio is capable of supporting and we do not want to be swapping the Kenwood GA and E models out a bunch of times for many reasons, including the crew time that entails. What we are doing right now is a troubleshooting experiment, by operating the radio on 70 cm APRS. This will run until March 2.' Encourages reception reports!

For those tracking the ARISS service module radio work, this is part of the update our Chair shared on the ARISS Discord.

The SM radio is used for APRS, SSTV and crew STEM contact activities. The equipment encountered issues during a 2025 SSTV event.

Astronaut Sophie Adenot (ESA, KJ5LTN) on the ISS with floating hair, holding a tablet during an ARISS radio contact. Poster announces upcoming direct ham radio link from Escola Naval in Rio de Janeiro, Brazil, on March 3, 2026 at 12:17 UTC / 9:17 AM local time, using NA1SS callsign and 145.800 MHz FM frequency. Ground station PY1AA. NASA/ARISS event graphic."

Contact upcoming with Brazil!

Students at Escola Naval in Rio de Janeiro will talk live via ham radio with Sophie Adenot on the ISS.

Scheduled Mon 02-Mar at 12:17 UTC | 7:17 AM ET | 9:17 AM BRT direct via PY1AA.

Listen to the downlink on 145.800 MHz FM in South America.

Find links to the proposal webinar and other guides at ariss-usa.org/hosting-an-a...

Don't miss out! Last opportunity for U.S. educators to host ARISS ISS contact in 2026 (Jul-Dec). Proposals due Friday 11:59 PM PT. Check proposal webinar on ARISS YouTube. Photo: Educator helping child ask question to space crew.

US Educators, don't miss out on a chance to submit for an ARISS STEM contact in 2026.

Proposals are due by Friday (2/27) at 11:59 PM PT. Find out more at our website!

YouTube video by ARISS - Amateur Radio on the ISS Space Chat: ISS and Ground View of FIRST US Governors Cup, Washington DC - February 2026

We have a very special edition of Space Chat just published!

Watch the FIRST Governors Cup robotics tournament contact in Washington DC combined with footage that Chris Williams sent down from the ISS.

It's a rare view of both sides of an ARISS contact at once!

youtu.be/mqHvXpb7evo

This contact was successful! Congratulations team!

How's it going?

Update to contact with South Africa.

Learners at CityKidz Pre and Primary School in Johannesburg will talk with Chris Williams on the ISS via ham radio.  

Scheduled Wednesday now at 12:40 UTC | 7:40 AM ET | 2:40 PM SAST via AB1OC telebridge. (2 minutes earlier)

Listen on 145.800 MHz FM.

Yes. Following doppler shift will be more important on 70 CM!

Kenwood TH-D75 handheld radio display showing RSØISS station list entry on 145.825 MHz PTT, alongside an ARISS APRS status graphic announcing packet operations from ISS Zvezda Service Module on 437.825 MHz until March 2, with digipeater path, callsign, FM 1200 baud mode, beacon rate, and low-power Yagi recommendations. Includes ARISS logo and 2025 beacon packet credit.

ARISS ops teams in Russia have worked with the ISS crew to set the Service Module radio to 70 CM and APRS for testing.

APRS will be available on 437.825 MHz until next Monday (02-Mar).

Follow us for updates as the testing continues.

"Graphic thanking ARISS USA sponsors: ISS National Laboratory, NASA's SCaN, ARRL, AMSAT, ARDC. Donate at ARISS.org."

Happy Monday! Let's start this week with some appreciation for our US sponsors! ISS National Labs, NASA SCaN, ARRL, AMSAT and ARDC.

These groups help a large team of mostly volunteers keep ARISS doing 70+ STEM contacts a year and so much more. Thanks!

Join the adventure! ARISS graphic shows mentor Tanya Anderson and a young student during a live ISS astronaut Q&A via ham radio. Invites schools to submit proposals for their own contact: Deadlines vary by region—USA this Friday, Europe/Africa/Middle East March 27, check ARISS.org for more.

Get your educational group involved with ARISS for a once-in-a-lifetime experience for your kids!

It all starts with a visit to our website: www.ariss.org/apply-to-hos...

"NASA astronaut Chris Williams in blue flight suit prepares for a live ham radio Q&A with students at CityKidz Pre and Primary School in Johannesburg, South Africa. Scheduled for Feb 25, 2026 at 12:42 UTC / 2:42 PM local time via NA1SS on 145.800 MHz FM. ARISS event poster with ISS and amateur radio details."

Contact upcoming with South Africa!

Learners at CityKidz Pre and Primary School in Johannesburg will talk with Chris Williams on the ISS via ham radio.

Scheduled Wed. 25-Feb at 12:42 UTC | 7:42 AM ET | 2:42 PM SAST.

Hear the downlink on 145.800 MHz FM in eastern North America.

Contact was successful.

Just 2 hours until contact with Washington DC.

Robotics experimenters at the FIRST x XRP Governor's Cup event will talk with Chris Williams live on the ISS via ham radio.

Scheduled today at 14:56 UTC | 9:56 AM ET via K6DUE telebridge.

Listen to the downlink on 145.800 MHz FM

Members of the Bridgerland Amateur Radio club in Northern Utah worked yesterday in the snow to prepare for the ARISS contact later today!

Great job gang!

Contact with Utah later today!

Learners at The Center for Creativity, Innovation, and Discovery in Providence with talk via ham radio with Chris Williams on the ISS.

Scheduled today at 17:13 UTC | 12:13 ET | 10:13 MT direct via W7IVM.

Listen to the downlink on 145.800 MHz. Watch at live.ARISS.org

Update: The contact will now start at 17:13 UTC | 12:13 PM ET | 10:13 AM MDT due to an ISS boost burn.
We expect a livestream as well. Watch for information in our day-of-contact post.

ARISS is everywhere! Follow Amateur Radio on the International Space Station for STEM inspiration, ISS contacts, and space updates. Facebook: ARISSIntl X: @ARISS_Intl Instagram: @ariss_intl BlueSky: @arissintl .bsky.social Mastodon: @ARISS_Intl @mastodon .hams.social LinkedIn: arissintl YouTube: @ARISSlive Join the fun on Discord: discord.gg/MRMQmrAtbY #ARISS #AmateurRadio #ISS #STEM"

You know, you don't have to wait until a Friday to follow ARISS social media.
Check us out on your favorite platform, and, join in on Discord for a deeper conversation.

Glad you are excited! You probably won't be able to hear this in Europe - this one is during a North America pass and the team putting on the event does not plan to stream it.

Image for the FIRST x XRP Governors Cup. Scheduled Friday, 20-February 14:56 UTC | 9:56 AM ET (Local) ISS crew member Chris Williams, KJ5GEW, will use NA1SS callsign. Ground station callsign is K6DUE for this telebridge contact. Listen on 145.800 MHz FM. The cross-band voice repeater will be offline for this event.

Contact upcoming with Washington DC.

Robotics experimenters at the FIRST x XRP Governor's Cup event will talk with Chris Williams live on the ISS via ham radio.

Scheduled Friday 20-Feb at 14:56 UTC | 9:56 AM ET via K6DUE telebridge.

Listen on 145.800 MHz FM

NASA astronaut Chris Williams, wearing a blue flight suit with NASA and mission patches, stands with arms crossed against a dark background in this 2025 pre-flight portrait.The image is a promotional graphic for an upcoming ARISS (Amateur Radio on the International Space Station) direct contact event on Thursday, February 19, 2026, at 17:17 UTC (10:17 AM local MDT in Providence, UT). It features Chris Williams in his spacesuit on the left side, with event details on the right including the location at the Center for Creativity, Innovation, & Discovery in Providence, UT; ISS callsign NA1SS; ground station W7IVM; frequency 145.800 MHz FM; and notes about the cross-band repeater being offline. The ARISS logo appears at the bottom.

Contact upcoming with Utah!

Learners at The Center for Creativity, Innovation, and Discovery in Providence with talk via ham radio with Chris Williams on the ISS.

Scheduled Thu 19-Feb at 17:17 UTC | 12:17 ET | 10:17 MT direct via W7IVM.

Listen to the downlink on 145.800 MHz.

It's been a great weekend at Hamcation, and there's still time to talk all things ARISS today.

Come by our booth to see the IORS radio system that's on station, watch our new STAR robot in action, or just catch up over coffee! We're in the West hall.

Graphic for HamCation 2026 ARISS forum. Text reads: 'Hamcation 2026' at Central Florida Fairgrounds February 13-15. Saturday 10:30 AM forum in Tent 1 celebrating 25 years of continuous operations on the ISS and more. Visit ARISS booth in West Hall for expert questions and swag. Features ARISS logo and 'Welcome to Hamcation' header in bold orange and blue colors.

At 10:30 today join members of the ARISS-USA leadership team for our annual Orlando HamCation forum!

25 years of history on the ISS, commercial space, so much in our STEM world, and the onboard crew ham radio activities all get updates when you see us in Tent I!