1. A method for computing one or more timing errors that occur in one or more multiple reflections predicted by a multiple prediction algorithm, comprising: generating one or more actual three-dimensional primary travel times and one or more actual three-dimensional multiple travel times; applying the multiple prediction algorithm to the actual three-dimensional primary travel times to generate one or more travel times for the multiple reflections predicted by the multiple prediction algorithm; and subtracting the actual three-dimensional multiple travel times from the travel times for the multiple reflections predicted by the multiple prediction algorithm.