Amateur Radio on the International Space Station (ARISS) has announced that slow-scan television (SSTV) transmissions are planned for Cosmonautics Day, Saturday, April 11 from RS0ISS in the ISS Russian sector.Cosmonautics Day celebrates space pioneer Yuri Gagarin’s April 12, 1961, as the first human to reach space.The SSTV event will get under way at on April 11, 1000 UTC on 145.800 MHZ and con…