Progress on the development of the multi-channel, ground\npenetrating radar imaging system is presented from hardware and software\nperspectives. A new exponentially tapered slot antenna, with an operating\nbandwidth from 100 MHz to 1.5 GHz was fabricated and tested using\nthe eight-port vector network analyzer, designed by Rhode and Schwarz\nIncorporated for this imaging project. An eight element antenna array\nmounted on two carts with automatic motor drive, was designed for optimal\ncommon midpoint (CMP) data acquisition. Data acquisition scenarios\nwere tested using the acoustic version of the NORSAR2D seismic ray tracing\nsoftware. This package enables the synthesis and analysis of\nmulti-channel, multi-offset data acquisitions comprising more than a\nhundred thousand traces. Preliminary processing is in good agreement\nwith published bistatic ground-penetrating radar images obtained in the\ntunnels of the Low-noise Underground Laboratory (LSBB) at Rustrel,\nFrance.
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