Sensor Technology Comparison Method and Case Study, Part I

Sensor performance is vital to the quality of seismic image and detailed comparative study between the velocity and acceleration types will enhance a deeper understanding. In the analytical approach in Part I, it is demonstrated that the time delay of analog geophone data can be as large as 0.12 ms, depending on input signal spectrum, the range of sensor variances, and the deconvolution process; but a typical accelerometer time delay is only 10 μs. It also discusses the issue of the low frequency attenuation by geophones, in contrast to an accelerometer’s flat response to DC. Further digital synthesis analysis in part II provides further quantifying evidences of performance differentiators by statistical measures in terms of time delay, correlation and coherence.