  This paper is concerned with a reconstruction method for multiple moving
point/dipole wave sources. We assume that the number, locations, and
magnitudes/moments of wave sources are unknown, and consider the problem to
reconstruct these parameters from the measurement of the wave field on the
boundary. For this problem, we derive algebraic relations between the
parameters of wave sources and the reciprocity gap functionals, and propose a
real-time reconstruction procedure based on these relations. We perform some
numerical experiments, and show the effectiveness of our reconstruction
procedure.
