BioSonics split-beam beam compensation

Echoview implements the BioSonics split-beam beam compensation algorithm according to specifications supplied by BioSonics. The BioSonics split-beam beam compensation model describes a 3D parabola in beam width ratio coordinates. The algorithm corrects BioSonics single target TS with a beam compensation function. The beam compensation model used by BioSonics generally compensates accurately down to about -6 dB for most transducer types. Please contact BioSonics directly if further details are required.

The BioSonics split-beam beam compensation algorithm is:

TS corrected = TS uncorrected + CorrBioSonics

Where:

Symbol		Description
TS corrected	=	Corrected TS (dB re 1 m2) - see compensated_TS
TS uncorrected	=	TS of detected single target (dB re 1 m2) - see uncompensated_TS
CorrBioSonicsSplitBeam	=	BioSonics split-beam beam compensation function in dB. Where: CorrBioSonicsSplitBeam = 2B( θ, φ) where B( θ, φ)+ is defined as: Where: +Notes:* B(θ,φ) is negative. B(θ,φ) is equivalent to the Bn column in Visual Analyzer’s target output file. This simplifies to: Where: θ = Single target major and minor axis angles in degrees. θy is the single target minor axis angle. θx is the single target major axis angle. φ = Transducer major and minor axis angles in degrees. φy is the transducer full beam width minor axis angle. φx is the transducer full beam width major axis angle.

BioSonics split-beam beam compensation

See also