Abstract
Vibrators and vibrator control systems have been deployed for seismic source tests at several BP geophysical test sites. Vibrator motions were monitored using independent accelerometers mounted on the baseplate and reaction mass. The groundforce signal, as defined by Sallas (1984) and calculated by the vibrator electronics system, was also recorded. At each site the radiated signatures were monitored using a down hole string of cemented geophones and a surface spread.
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