ALT ARISS promotional graphic announcing an SSTV event from the International Space Station. The left side shows a star-filled space background with the Expedition 75 mission patch above an image labeled “SSTV Series 33,” featuring the ISS orbiting above Earth. The right side contains event details in white and gold text: “SSTV This Weekend! Expedition 75 / Series 33 ‘Student Education’ event.” Start: Friday, October 2 at 09:00 UTC (5:00 AM ET). Frequency: 437.550 MHz with Doppler shift adjustment. SSTV mode: Robot 36, transmitting 36 seconds on and 2 minutes off. End: Tuesday, October 6 at 15:55 UTC (11:55 AM ET). Participants are invited to submit received SSTV images to the ARISS SSTV gallery for an official event certificate. A note states that APRS will be offline during the SSTV event. The ARISS logo appears in the lower-right corner.
ALT Educational ARISS graphic about listening for unscheduled amateur radio contacts with International Space Station crew members. The left side shows a NASA photo of a crew member inside the ISS holding a handheld radio microphone in a module filled with cables, equipment, and panels. The right side contains text explaining that some crew members use ham radio during free time, typically in the evenings (1830-1930 UTC) and on weekends. It notes these casual contacts are unscheduled and may be heard on the ISS voice repeater at 437.800 MHz downlink and 145.990 MHz uplink with CTCSS 67 Hz. The graphic advises listeners not to call for the crew and to simply listen if a contact is underway. The ARISS logo appears in the lower-right corner.
ALT Graphic titled “You Asked: Doppler Shift” with the question, “What do I need to know about Doppler Shift to improve my contacts with the ISS?” A photo shows an Icom IC-9700 amateur radio transceiver displaying a received frequency near 437.794 MHz, with additional radio equipment above it. Text explains that as the International Space Station moves across the sky, its radio signals experience an apparent frequency change called Doppler shift. An example notes that a 437.800 MHz signal may vary by about ±9 kHz during a pass, and adjusting for the shift improves reception. Additional text references AMSAT-UK.org resources for beginners using FM satellites. A caption below the photo notes that some radios provide frequency tracking to help monitor Doppler shift during an ISS contact and that the image shows a radio used by an ARISS team member. The ARISS logo appears in the lower-right corner.
ALT This ARISS FAQ graphic explains key operating items relating to APRS. Use 145.825 MHz and include ARISS in your path. Expect to see callsign RS0ISS in your downlink packets, and use 5 watts or fewer please.
