A seismic data acquisition system includes a streamer spread including plural streamers that
extend along an inline direc tion X; a set of front sources that are positioned ahead of the
streamer spread along the inline direction X; and a set of top sources that are positioned on
top of the streamer spread, along a horizontal direction that is perpendicular to the inline
direction X. A characteristic of the set of front sources is different from a characteristic of the
set of top sources, and bins corresponding to collected seismic data from each source set …