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 co-ordinates. 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 + CorrBio

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
CorrBio	=	BioSonics split-beam beam compensation function in dB, where: CorrBio = 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:
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 the transducer full beam width minor axis angle. φx is the the transducer full beam width major axis angle.

BioSonics split-beam beam compensation

See also