Two CubeSats, built by students at the Technical University of Berlin, are expected to launch in the 4th quarter of 2012 from Baikonour into a 575km circular 65 degree orbit.
BEESAT-2 is a 1U cubesat project intended to test a reaction wheel and an Attitude Determination and Control (ADC) system. Will also carry an experimental camera.
BEESAT-3 is a 1U cubesat project intended to test a transmitter using commercial S Band frequencies outside the amateur satellite service.
Up- and downlink of both of these CubeSats is established by half-duplex GMSK modulated narrow-band radio at 436.000 MHz. The standard data rate is 4800 bps but can be switched to 9800 bps for increased channel capacity at higher elevations. Each transmission at the higher data rate is announced by a small 4800 bps header to allow for adaptive receiver re-configuration. The modem device used is the CML CMX909b.
For more information see http://tinyurl.com/TUB-BEESAT
IARU Amateur Satellite Frequency Coordination pages hosted by AMSAT-UK http://www.amsat.org.uk/iaru/
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