Asymptotic estimation of wave field attenuation in caustic shadow, taking into account the refractive index variations

The problem of the wave field estimation in the area of caustic shadow is solved in the article in case of significant variations of inhomogeneous medium characteristics. The appropriate modification of uniform asymptotic expansions is developed for the wave field presentation in the region of smooth caustics, and the construction algorithms are presented, by means of geometrical optic approximation data in the light zone