11. A system comprising: an interface to receive seismic data acquired by seismic sensors of a composite seismic signal produced by the firings of multiple seismic sources; and a processor to process the seismic data to: model the seismic data based at least in part on models for the sources and linear operators; jointly determine the models based at least in part on the modeling and at least one constraint specifying an interdependency between at least two of the models, wherein the at least two models are different; and based at least in part on the determined models, generate a dataset representing a component of the composite seismic signal attributable to one of the seismic sources.
13. The system of claim 11 , wherein the seismic sources are fired simultaneously.