Say that in a certain location, the ground roll is observed to be greater than the reflected waves, so a decision has been made to bury geophones. The troublesome ground roll is observed to travel at six-tenths the speed of a water wave. Assume the data contain all frequencies from 10 to 100 Hz. Claerbout, p. 62, exercise 1. Claerbout, p. 74, exercise 1.
Most functions are real.
Their imaginary part is zero. Claerbout, p. 74, exercise 2. Figure out how to capture the screen image and print it on your machine. Claerbout, p. 74, exercise 3. The real part of the FT plotted in the previous exercise is somewhat difficult to interpret because of the awkward placement of the negative frequencies and wavenumbers.