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 S2 VLBI system is described in some detail, including the S2 data acquisition system, data recorder & playback terminals, and the correlator.
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)