Conclusion

With the extra amplitude correction term, the amplitude preserving one-way wave equation improves the amplitude of the wavefield. The extra amplitude correction in the equation is mathematically equivalent to the first order approximation of WKBJ amplitude correction. But unlike the WKBJ correction, the amplitude preserving one-way wave equation can be used for a laterally varying velocity. The accuracy of this correction in the presence of lateral velocity variation has not been analyze yet.