What receivers will we use for low frequencies?
Peter W. Maxwell, Malcolm Lansley · 2011
With the increased industry interest in low frequencies down to less than 1 or 2 Hertz, there has been a significant effort in developing techniques that can source these low frequencies. Low-dwell, non-linear sweeps and pseudorandom sweeps have been developed by a number of companies to increase vibrator output at low frequencies. Equipment manufacturers have made improvements to vibrators to increase reaction mass and upgrade base-plates. But what about the recording units and the receivers that make up the remainder of the acquisition system? Do we need something special here? We discuss some of the special requirements for low frequency recording and review different receivers, their applicability and limitations.