oa Full-wave Inversion in Frequency-domain

We made a numerical experiment on full-wave inversion based on acoustic wave-equation in frequency-domain. The core of this method is that we can select frequencies to calculate the Frechét derivative of wave-field in terms of velocity at each iteration. Numerical experiments show that we don’t have to use all frequencies in the observed data at one iteration. In the early stage of iteration we calculate the Frechét derivative by using low frequency, and later by using high frequency. Consequently computing cost is lower than that by using all frequencies and we can get a high-resolution image.