Many special event stations will be active around the world this week to celebrate the 50th anniversary of the first human space flight. Special event stations R50YG and R50SK are active from Baikonur until April 14 and the special call R50KEDR will be on the air on April 12 from 0507 to 0655z to commemorate the 108 minutes of Gagarin's first flight.Southgatearc.org informs about the list of Russian stations that will be active:R50YG "Yuri Gagarin"R50SK "Sergey Korolev"RG50DRG50KRG50F Star City training centerRG50C Landing SiteRG50GR1961GU5ARTEK/AR3K Energija Space Flight Control Center
ARISSat-1 to be Activated Aboard ISS Starting April 11The ARISSat-1 satellite, presently still inside the ISS, will be turned on and use an external antenna to celebrate the 50th anniversary of Yuri Gagarin's first manned space flight. The transmissions will begin on Monday 11 April 2011 at 14:30 UTC and continue until 10:30 UTC on 13 April 2011. Due to the fact that the solar panels are covered, the satellite will be powered only by the onboard battery. The satellite will run in low power mode. This means that the transmissions will cycle ON/OFF. They will be ON for 40-60 seconds and OFF for 2 minutes.145.950 MHz FM Downlink:FM transmissions will cycle between a voice ID, select telemetry values, 24 international greeting messages in 15 languages and SSTV images. One of the messages will be a conversation between Yuri Gagarin and ground control.145.919 MHz CW BeaconThe CW transmissions will be callsign ID, select telemetry, and callsigns of people actively involved with the ARISS program.145.920 MHz SSB BPSK-1000 TelemetryThe BPSK transmissions will feature a new 1kBPSK protocol developed by Phil Karn, KA9Q to be readable in low signal level conditions. The BPSK data will transmit satellite telemetry. Given the low duty cycle of the spacecraft, those planning to receive the digital telemetry are encouraged to record the entire signal band using the FunCube dongle or SDR-IQ receivers. Download the Windows ARISSatTLM free ground station soundcard demodulator and display software here.Download the Mac ARISSatTLM software here.The ARISSatTLM software user guide is available here.