Block II: Computational options

Similarly to the other modules, the output is controlled by a number of one-letter options:

B

Bartlett Beamformer [13].

M

Maximum Likelihood Method (MLM) Beamformer [13].

Q

Multible Constraint Method (MCM) Beamformer [14].

T

Tolerant beamformer. One of ABB's inventions, not yet published. The estimated spatial coherence and the tolerance must be specified in Block VII.

W

Plane wave replicas. Used in combination with any of the beamformers.

K

Blurring of covariance matrix corresponding to the coherence length specified in Block VIII.

D

Produces a contour plot of the ambiguity function vs depth and range (for matched field processing) for each of the selected beamformers. The plot axes are determined automatically to fit the replica space. If option W (plane wave beamforming) is also specified, the ambiguity function will be contoured vs azimuth (bearing) and vertical angle (grazing, positive downward).

R

Produces a contour plot of the ambiguity function vs x-range and y-range (for matched field processing) for each of the selected beamformers. The plot axes are determined automatically to fit the replica space. This option has no effect for option W (plane wave beamforming)

X

Produces an expanded printout of beamformer results.