Abstract
A correlator corresponding to the modern requirements for processing very long baseline interferometer (VLBI) observation data has been developed at the Institute of Applied Astronomy, Russian Academy of Sciences (IAA RAS) for the Quasar VLBI network. The correlator can process data flows of up to 1 GB/s from each station. The maximum numbers of simultaneously processed stations and baselines are 6 and 15, respectively. The correlator is equipped with Mark5B playback systems, thus allowing quasi-real time VLBI session processing. The XF processing algorithm is implemented in the hardware-software correlator. Hardware is used to calculate cross-correlation functions and extract calibration signals of the picosecond-pulse generators of stations. At present, the correlator is used to process all VLBI observations of the Quasar network performed according to national programs.
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