Phase stability of a satellite-VLBI-receiver at 22 GHz |
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Authors: | Juha Mallat |
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Institution: | (1) Radio Laboratory, Helsinki University of Technology, Otakaari 5 A, SF-02150 Espoo, Finland |
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Abstract: | The phase stability of the Radioastron 22 GHz satellite-VLBI-receiver has been studied by measurements. The resulting performance of the receiver in an interferometer system was evaluated. The maximum phase jitter value of 2° due to the receiver causes only marginal degradation for astronomical observations. During observations the requirement of a phase drift value less than 3° in the receiver system can be met after an initial warm-up if the overall ambient temperature changes do not exceed 4°C. |
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