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A unique lag-based VLBI correlator system has been developed for the purpose of supporting both S2-based Space VLBI observations in the Japanese-led VSOP mission and the Canadian Geodetic VLBI program. The system architecture has been designed so that replication of a small number of modules can be used to construct systems with a wide range of sizes.… (More)
This article summarizes the results of IVS Working Group 3 'VLBI2010', which was charged with creating a vision for a new geodetic VLBI instrument that will meet requirements for the coming decades. This comes at a time when problems with aging antennas, a deteriorating radio frequency environment due to interference, obsolete electronics, and high… (More)
The Canadian geophysical long baseline interferometer, a new very long baseline interferometer system, has been developed and put into operation. The system tracks source delay and fringe rotation during observation using a wave front clock. After the low-noise receiver the signals from radio sources are channelized and down converted to baseband, each… (More)
The S2 VLBI system is described in some detail, including the S2 data acquisition system, data recorder & playback terminals, and the correlator.