The polynomial approximation method is also employed to obtain simple formulas for frequency and amplitude correction.
本文利用多项式逼近方法获得了频率和幅值修正的计算公式。
2
The expression of complex amplitude is given in reference plane vertical to the optical axis by far-field approximation when the line source and the principal axis are at any Angle.
The depth migration with higher-order approximation by time-shift algorithm eliminates the frequency dispersion and amplitude distortion in the calculation process.