09/07/2026
Saturday evening, September 5, listening to FM communications via the Amateur Radio repeater (NA1SS) on the International Space Station (ISS). This time the ISS was at 13° elevation. I’m using an ICOM IC-705 Transceiver and Comet GP-9 Dual-Band VHF/UHF Vertical Antenna at 25’ elevation using the SDR-Control iPad app. Because of Doppler shift, I’m tuning the receiver frequency slightly to compensate. — The International Space Station (ISS) operates a cross-band FM repeater (IORS) that allows licensed amateur radio operators to communicate via a 2-meter uplink and 70-cm downlink, generally using an uplink of 145.990 MHz (PL 67 Hz) and downlink of 437.800 MHz. — space icom705 sdrcontrol