Patent ID: 7319636
Filing Date: 2008-01-15
Classification: G01V

Abstract:
1. A method for computing a pressure signal gradient, comprising: recording a plurality of pressure signals at a first receiver and a second receiver, wherein the first receiver and the second receiver are disposed within a cluster; computing a calibration filter by minimizing a cost function φ(k where G(ω) represents the calibration filter, φ(k x , ω) represents a cost function, ρ represents the density of water, ω represents the angular frequency, {tilde over (P)} 1 represents the recorded pressure signals at the first receiver, {tilde over (P)} 2 represents the recorded pressure signals at the second receiver, Δz represents a vertical distance separating the first receiver from the second receiver, and k z represents an absolute value of a vertical wave number; and storing the calibration filter to memory.