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.

Kenwood Leaving Amateur Radio?

Rumors are swirling, when Kenwood was noticed missing from the Dayton Hamvention. It was reported that Kenwood has decide to step away from the Amateur Radio sector and focus on the business unit.

It is certain that the global computer chip shortage and cost increases are playing a large role in the decision.

As of today, there are only 3 transceivers on their Canadian site and 8 mobile and station radios on the US site.

Current Status of ISS Radios Updated

as of Feb 23, 2022
​Columbus Module radios:

  • IORS (Kenwood D710GA) – STATUS – Configured. 
    Current mode set to cross band repeater (145.990 MHz up {PL 67} & 437.800 MHz down).  Next mode change to support packet operation (145.825 MHz up & down) is currently TBD.​​​
    • Radio to be powered off on March 1 to support an ESA experiment. Radio OFF about 14:30 UTC. Radio ON about 15:00 UTC.
    • Radio to be powered OFF to support US EVA on March 15.
    • Radio to be powered OFF to support US EVA on March 23.
    • Supporting USOS scheduled voice contacts, packet and voice repeater ops.

Service Module radios:

  • Kenwood D710E – STATUS – Radio usually off.​ ​​ ​​​
    • Radio to be powered OFF to support US EVA on March 15.
    • Radio to be powered OFF to support US EVA on March 23.
    • Supporting ROS scheduled voice contacts and SSTV.
    • Kenwood D710GA for SM delivered on 80P. Installation TBD in Increment 67.

The status has been updated on the ISS page.

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.