seimic data resampling

Sampling interval은 Nyquist Frequency에 의해 결정된다라고들 하지만 실제로 현장에서는 그렇게 탐사를 설계하지 않는다.

http://seismicreflections.globeclaritas.com/2013/05/marine-processing-part-1-resample.html

If we record data such that the maximum frequency is 250 Hz, but then resample to a 4 ms sample interval and filter out energy above around 120 Hz, we can be confident that there are no aliased frequencies in our raw data.

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