Parameters evaluation of waveguide with use of the moving tonal source

The algorithms of analytical calculation of the reflection factor derivatives for various parameters of a sea bed model consisting of n several plane parallel homogeneous liquid absorbing layers laying on an infinite elastic absorbing half-space are offered. The algorithm of a parameters evaluation of the multilayer waveguide possessing an increased accuracy is developed. It allows to increase speed of account by 4-6 times in comparison with similar tools using for calculation of derivatives the numerical methods. Because the algorithm has ample wide area of convergence, it is enough to execute 6-10 iterations to receive unknown parameters having a relative error less than 10^-5. This paper presents some testing results of the designed algorithm on the real experiment data, which were performed in the Arctic Ocean