We consider the problem of imaging one or more sources in a two-dimensional
waveguide with horizontal flat boundaries and random sound speed fluctua-
tions. Our data is the acoustic pressure field, measured on a vertical array
of hydrophones that may span the entire depth of the waveguide or a part
of it. We use randomness to model the effect of internal waves on the sound
channel. Although the strength of the fluctuations is small, the transmitted
signal is significantly affected from the multiple scattering of the waves with
the random inhomogeneities, especially since we consider large propagation
distances between the sources and the receiver array. Imaging is performed
following an incoherent approach relying on a transport system of equations
that describes wave propagation in random waveguides and that takes into
account modal dispersion and energy transfer between modes.
(EN)
