A pair of satellites
launched in May by the U.S. Naval Academy contains a PSK-31 transponder that
The BRICsat satellite.
(US Naval Academy photo)
supports up to 30 simultaneous users. According to the ARRL, the two satellites
- named PSAT and BRICsat - have separate transponders operating on the same
frequency but using slightly different PSK tones.
The rocket that carried
PSAT and BRICsat into orbit also launched the Planetary Society's LightSail-1
satellite, which has a telemetry downlink in the 70-centimeter ham band (it's
transmitting 9600-baud FSK in AX.25 format on 437.435 MHz). The ARRL reported
that the LightSail transmitter briefly shut down due to a software glitch, but
managed to reset itself and come back on the air. Controllers were planning to
upload a software patch to prevent recurrence of the problem.