Robust processing of noisy land-based controlled-source electromagnetic data

摘要: ABSTRACTWhereas robust processing techniques are routinely used for estimating high-quality magnetotelluric (MT) transfer functions, such not commonly applied controlled-source electromagnetic (CSEM) processing, although CSEM and MT data suffer from similar noise. We implemented a new scheme that combines CSEM-specific preprocessing with statistically least-squares stacking to extract interpretable ground responses very noisy onshore data. the signals transmitter was equipped three grounded electrodes allowed us generate at multiple source polarizations relatively little field effort. For this setup, we formulated bivariate relation between currents injected through any two of recorded components. The resulting weighted system equations which determined a...