Properties of the ground force signal complicated by harmonics are studied. It is shown that adaptation filters, enable matching amplitude- and phase- frequency characteristics in corresponding range, have a simple form. The problem focusing containing using correlation deconvolution discussed. An example to expand spectrum given.

This account is a progress report on geological mapping and field data compilation around part of the southern Cordillera LITHOPROBE transect in the lntermontane Belt. Objectives included integrating and improving the surface geological database for interpretation of the 1988 Vibroseis survey and reassessing the geological setting of mineral occurrences in the area. The transect route lies in t...

Our sweep design methodology centers on creating a frequency dependent force-amplitude (drive) function such that the drive-level at each frequency is maximised but does not exceed the mechanical limitations of the vibrator. Bagaini (2008) showed how we can overcome the reduction in energy from reducing the drive-level by increasing the instantaneous sweep rate. This methodology has commonly be...

A model of nonlinearity of the contact between the vibrator baseplate and the ground is proposed to describe the distortion of vibroseis signals in the near-field. A thin layer between the baseplate and the soil exhibits a strong nonlinear response because of the difference in its rigidity between the compression and tension phases. The model allows for a quantitative description of the transmi...