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Isolation measurement between uplink and downlink antennas at low earth orbiting satellite ground station

The project "MOST" (micro variability and oscillations of stars) is a Canadian micro satellite space telescope mission. The micro satellite carries a Rumak-Maksutov telescope with an aperture of 15 cm. The size of the satellite is 65 cm times 65 cm times 30 cm and the mass is about 65 kg. The goals of the mission are to analyze the inner structure of stars, set a lower limit to the age of the universe and to search for exoplanets. The project MOST consists of a low earth orbiting (LEO) Satellite and three ground stations, one of them in Vienna. The satellite link operates on 2 GHz band. The separate antennas are used for uplink and downlink in order to achieve better downlink margin. The isolation measurement between uplink and downlink antennas is presented.