Bottom sound speed and attenuation inverted by using pulsed waveform and transmission loss

The bottom sound speed and attenuation were inverted by using the pulsed waveform and transmission loss.In the process of the inversion,(1) the effect of the depth of waer on the inversion results were discussed and a methodfor determining the depth of water was given out,(2) the inverted attenuation has nonlinear frequency relationship,(3) the effect of inhomogeneous bottom on the inverted results was discussed.