Simultaneous APRS and Voice Repeater on the International Space Station

08/15/2022

ARISS, Amateur Radio on the International Space Station, announced that simultaneous operations of the ARISS Voice Repeater and digital APRS communications on the Space Station is now a reality.  Current ARISS operations include voice repeater transmissions with the JVC Kenwood D710GA in the Columbus module and APRS packet operation from an identical radio in the Service Module (Zvezda).  Packet operations are on 145.825 MHz.

The ARISS Russia and USA teams have been working for several weeks to prepare the Service Module radio for APRS operations. ARISS Russia team member Sergey Samburov, RV3DR, led the effort, working with Russian mission controllers and the on-board ISS cosmonauts to configure the Service Module radio for APRS ops. On August 11, final checkouts were completed and the APRS packet mode was switched on for amateur radio use.

ARISS-International Chair Frank Bauer, KA3HDO, said, “Simultaneous operation of APRS and the voice repeater on ISS is transformative for ARISS and represents a key element of our ARISS 2.0 initiative, providing interactive capabilities 24/7 that inspire, engage and educate youth and lifelong learners—especially life-long learning in ham radio operations. … Our heartfelt thanks to Sergey Samburov, RV3DR, for making this crucial ARISS 2.0 initiative become a reality.”

The Columbus Module radio uses the call sign NA1SS and the new Service Module radio uses RS0ISS. Aside from the call signs, the radios are identical and packet operations are the same as before. Hams can use RS0ISS, ARISS, or APRSAT as the packet path. Also, both radios are expected to be on full time, except during educational contacts, EVAs, and dockings or undockings.

You can find operational status and expected downtimes of the ISS radios at https://www.ariss.org/current-status-of-iss-stations.

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 ARRL  The National Association for Amateur Radio®, the Radio Amateur Satellite Corporation (AMSAT), the ISS National Lab-Space Station Explorers, Amateur Radio Digital Communications (ARDC), and NASA’s Space communications and Navigation program. The primary goal of ARISS is to promote exploration of science, technology, engineering, the arts, and mathematics topics. ARISS does this by organizing scheduled contacts via amateur radio between crew members aboard the ISS and students. Before and during these radio contacts, students, educators, parents, and communities take part in hands-on learning activities tied to space, space technologies, and amateur radio. For more information, see www.ariss.org.

— Thanks to ARISS for the information in this news release.

Current Status of ISS Radio Stations

as of 07/28/2021

​Columbus Module radios:

  • IORS (Kenwood D710GA) – STATUS – Configured. Supporting packet operation (145.825 MHz up & down). Next mode change is to cross band repeater and targeting late August.​
    • Radio will be powered off July 28 about 17:30 UTC for Progress /MLM arrival. Scheduled to be powered on TBD due to MLM issues impacting ISS activities.
    • Supporting USOS scheduled voice contacts, packet and voice repeater ops. 

Service Module radios:

  • Kenwood D710E – STATUS – Radio usually off.
    • Radio will be powered off July 28 about 17:30 UTC for Progress /MLM arrival. 
    • MAI SSTV experiment sessions planned for Aug 6 and 7.  Setup about 10:50 UTC on August 6 and stop around 19:10 UTC. The activation on August 7 should start about 09:50 GMT and stop around 15:55 UTC. . 
    • Supporting ROS scheduled voice contacts and SSTV.

ARISS Packet Radio System Expected to be Back Late this Year

ARRL – The currently silent packet radio system on the International Space Station could be back on the air by year’s end.

Amateur Radio on the International Space Station (ARISS) hardware team members have located an original duplicate of the packet module that had been in use on the International Space Station (ISS) before failing more than a year ago after 17 years of service. With a new battery installed, the unit was tested and found to be functioning. The ARISS packet system in the space station’s Columbus module, operating on 145.825 MHz, quit last July after first experiencing some problems. All necessary paperwork has been completed to manifest the packet module on the Progress 71P spacecraft launch now set for Halloween, with docking on November 2.

“Installation date will depend on the crew’s busy schedule, but ARISS hopes packet can be online again by the end of November 2018,” ARISS said this week in a news release. ARISS said it’s heard from “many hams” who have been asking when the packet system will be back on the air.

When the ARISS packet module aboard ISS died in last year, the ARISS hardware team already was overburdened with the design and safety certification of the new interoperable radio system ARISS has been developing that’s set for launch next year. The team did attempt some basic troubleshooting of the old packet module but was unable to revive it and decided instead to dedicate all of its time to the new replacement radio system, including packet capability.

ARISS Packet Radio System Expected to be Back Late this Year

Early this year, thermal testing of the first flight-identical power supply for the new comprehensive radio system showed that some changes to air flow were needed. This change would delay launch of the new radio equipment from late 2018 to early 2019.