1. SpaceWorks Enterprises, Inc., “Nano/Microsatellite Market Forecast”, http://spaceworksforecast.com/docs/SpaceWorks_Nano_Microsatellite_Market_Forecast_2017.pdf, 2017
2. Results of the optical downlink experiment KIODO from OICETS satellite to optical ground station Oberpfaffenhofen (OGS-OP);Perlot,2007
3. SOTA OPTICAL DOWNLINKS TO DLR’S OPTICAL GROUND STATIONS;Fuchs,2016