A seismic survey is acquired close to a powerline that generates strong ~ 60Hz n

Question

A seismic survey is acquired close to a powerline that generates strong ~ 60Hz noise. Previous surveys in this area have shown that even-ordered harmonic overtones are also problematic [a harmonic overtone has a frequency of/b(l+w), where f_0 is the fundamental frequency and n > 0 is an integer that specifies the order). Assume that the powerline noise is in the band 59-61 Hz. Suggest a filter band that would be suitable to use for a bandpass filter to remove the powerline noise. Given the upper frequency limit for the filter in part (a), what is the maximum sampling interval to avoid aliasing? Based on the Widess criterion for thin-bed resolution (lambda/8), what is the minimum resolvable thickness for a layer of velocity V = 3000 m/s? Assume that the dominant frequency is at the centre of the bassband in part (a).

Explanation / Answer

A seismic survey is acquired close to a powerline that generates strong ~ 60Hz n

Related Questions

Navigate

• Browse (All)
• Browse A
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.