ISS SSTV 145.800 MHz FM June 21-26

Amateur Radio on the International Space Station (ARISS) logoARISS report there will be an “Amateur Radio on Shuttle, Mir and ISS” Slow Scan TV (SSTV) event from June 21-26. Transmissions from the International Space Station will be on 145.800 MHz FM using PD120.

The ARISS team will be transmitting SSTV images continuously from June 21 until June 26. The images will be related to some of the amateur radio activities that have occurred on the Space Shuttle, Mir space station and the International Space Station.

The schedule start and stop times are:

Monday, June 21 – Setup is scheduled to begin at 09:40 UTC (transmissions should start a little later).

Saturday, June 26 – Transmissions are scheduled to end by 18:30 UTC.
Downlink frequency will be 145.800 MHz and the mode should be PD120.

Those that recently missed the opportunity during the limited period of MAI transmissions should have numerous chances over the 6 day period to capture many (if not all 12) of the images.

Check the ARISS SSTV blog for the latest information

The signal should be receivable on a handheld with a 1/4 wave whip. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.

You can get predictions for the ISS pass times at

Useful SSTV info and links

MIR-SAT1 to deploy from ISS

MIR-SAT1 CubeSat

MIR-SAT1 CubeSat

The Mauritius Amateur Radio Society (MARS), is offering an Award to commemorate the deployment of the MIR-SAT1 CubeSat from the ISS, planned for June 22 at 10:55 GMT.

The award is open to all participating Radio Amateurs/SWLs worldwide and will be issued to those decoding MIR-SAT1 telemetry (TLM) and forwarding it to SatNogs.

Full details of the award and links to telemetry decoders are at

The deployment will be shown live on JAXA YouTube channel, the broadcast starts at 10:35 GMT on Tuesday, June 22.

The IARU Satellite Frequency Coordination page reports:

MIR-SAT1 is a 1U CubeSat mission with the following objectives:

1. Verify the performance of the on-board subsystems by receiving telemetry from the satellite and establish communication to and from the satellite (command and control).
2. Collect images of Mauritius and the Mauritian EEZ for capacity, building, experiment and research.
3. Experimental communication with other islands via the satellite (for scientific and/or emergency purposes), through a Radio Amateur digipeater payload.
4. V/U 9600bps GMSK digipeater may be open for Radio Amateur communication worldwide when the satellite not used for all above.

A downlink on 436.925 MHz has been coordinated. Decoders for the amateur radio community and schools have been developed by Chris AC2CZ and Daniel EA4GPZ and will be available in the public domain on their WEB sites/Github, Links will be provided before launch on Tweeter, AMSAT-BB and Space Mauritius, see

For the digipeater operation it will be necessary to evaluate the power available after deployment to decide on opening same 24/7 or on scheduled time.

IARU Satellite Frequency Coordination pages

Follow 3B8DU on Twiiter at

IARU in the CEPT Working Groups

CEPT LogoIARU volunteers have been participating in the CEPT FM and SE Working Groups looking after the amateur and amateur satellite service interests. CEPT WG-SE #88 took place during April and WG-FM #99 took place at the end of May.

The report from the IARU Region 1 site says:

WG-FM’s project teams tackle a wide range of civil spectrum applications and are developing important regulatory deliverables relating to wireless power transfer and the 23cm band RNSS coexistence topic amongst other things. Work on both these topics is ongoing.

The CEPT Radio Amateur Forum Group (RAFG) is hosted by WG-FM and is chaired by the IARU for the time being. Its main task is maintenance of the CEPT Recommendations TR61-01 and TR61-02. A proposal to merge the activities of the RAFG into project team FM58 (Maritime) has been made but the final decision has been held over until the next WG-FM meeting. The RAFG was tasked at this meeting with a new work item to consider the feasibility of developing an electronic database of CEPT wide amateur licensing documentation. This was supported by six administrations.

In WG-SE technical spectrum sharing studies are taking place covering;

• Wireless power transfer including consideration of electric vehicle charging (WPT- EV).
• UWB radiodetermination in 116 – 250 GHz.
• Vehicular radar systems in 77 – 81 GHz.
• Security Scanners in the range 60 – 90 GHz.
• 23cm band RNSS coexistence (related to the WRC item and reported in detail elsewhere)

Amateur service frequency bands are within the scope of all these studies and fall under the remit of the IARU R1 SRLC

A summary report of the WG-SE meeting is at

The WG-FM meeting is at

Working Group FM Meeting 99 documents

CHESS will not have an amateur payload

CHESS CubeSat - Credit EPFL Spacecraft Team

CHESS CubeSat – Credit EPFL Spacecraft Team

Two CHESS CubeSats had been planned to carry amateur radio linear transponders, however, it was announced on June 10, 2021, there will not be any amateur payload on the satellites.

A translation of the press release reads:

The CHESS project management, due to funding constraints, had to move the project towards a commercial cubesat platform. Space is scarce on this new platform to accommodate another payload. Subsequently, there is no longer an opportunity to carry a ham radio transponder on board.

The CHESS project management has correctly decided not to use frequencies in the amateur satellite service and to use earth exploration or experimental UHF- and X- band frequencies.

The ham community, who assured the funding of the transponder, is very disappointed by this decision, but must accept it.

Such projects always carry risks of one partner changing its mind. That is what happened here.

Many thanks to all who have actively supported the transponder project, especially the AMSAT-UK and AMSAT-NL team.

AMSAT-HB announcement

January 2021 project announcement

ISS repeater remaining on until after Field Day

Amateur Radio on the International Space Station (ARISS) logoThe International Space Station crossband FM repeater should remain active until after the Field Day weekend of June 26-27.

Amateur Radio on the International Space Station (ARISS) has decided to keep its ARISS InterOperable Radio System (IORS) in crossband repeater mode until after ARRL Field Day ends. The IORS ham station is located in the Columbus Module of the International Space Station.

ARRL HQ Contest Program Manager Paul Bourque, N1SFE, has confirmed that successful radio contacts made through the ARISS IORS, in crossband repeater mode, will count for an ARRL Field Day QSO point, but also for Field Day bonus points! Another fun opportunity for points. Don’t forget the rule limiting stations to 1 QSO per any single channel FM satellite.

On-orbit astronauts always have very busy schedules, but if a voice contact were to be made with them, it would count for QSO credit but not for satellite bonus points. Only an ARISS crossband repeater QSO qualifies for the bonus. Crossband repeater contacts are also valid for AMSAT Field Day for satellite operations, held concurrently with the ARRL event.

Frequencies for ARISS crossband repeater operation are as follows: 145.990 MHz up, 67 Hz tone and 437.800 MHz down. If you haven’t used the ISS repeater yet, be sure to practice with it before Field Day (June 26-27, 2021). These contacts can be tricky, but hams can practice right now…can you do it?

ARISS had planned a mode switch to APRS packet during the second week of June. Now, ARISS is targeting the switch by the astronauts to packet after the first ARISS school contact following ARRL Field Day. In more news for ARISS supporters: the astronauts will power down the ARISS radio station during USA spacewalks on June 16 and June 20, 2021.

ARISS – Celebrating 20 Years of Amateur Radio Continuous Operations on the ISS

ISS SSTV 145.800 FM June 9-10  

ISS SSTV MAI-75 image 9/12 received by Chertsey Radio Club on Baofeng handheld

ISS SSTV MAI-75 image 9/12 received by Chertsey Radio Club on Baofeng handheld

Russian cosmonauts on the International Space Station (ISS) are planning to transmit Slow Scan TV images on 145.800 MHz FM using the SSTV mode PD-120.

The transmissions are part of the Moscow Aviation Institute SSTV experiment (MAI-75) and will be made from the amateur radio station RS0ISS in the Russian Service module of the ISS using a Kenwood TM-D710 transceiver.

June 09, 2021 (Wednesday) from 09:35 GMT until 13:50 GMT*

June 10, 2021 (Thursday) from 08:55 GMT until 15:50 GMT*

*Dates and times subject to change.

The signal should be receivable on a handheld with a 1/4 wave whip. If your rig has selectable FM filters try the wider filter for 25 kHz channel spacing.

You can get predictions for the ISS pass times at


Useful SSTV info and links