1. (COMPUTER) Recall equation (7.17) for the vibroseis sweep function:
Solve for fo and b in the case of a 20-s long sweep between 1 and 4 Hz. Hint:
b = 3/20 is incorrect! Think about how rapidly the phase changes with time.
Compute and plot v(t) for this sweep function. Assume that A(t) =
sin2(71/20) (this is termed a Hanning taper; note that it goes smoothly to
zero at , = Oand / = 20s). Check your results and make sure that you have
the right period at each end of the sweep.
(c) Compute and plot the autocorrelation of v(t) between -2 and 2s.
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