get.TVG: Calculate the Time Varied Gain function.

In arnejohannesholmin/SimradRaw: Read and write Simrad raw files

Calculate the Time Varied Gain function.

Description

Calculate the Time Varied Gain function.

Usage

get.TVG(beams, x = NULL, linear = TRUE, TVG.exp = 2, Ro = NULL, thr1m = FALSE)

Arguments

beams	is the list of beams inputs including "lenb" (lengths of beams), "sint" (pulse length), "absr" (absorption coefficent of the beams) and "asps" (average speed of sound).
x	is the input acoustic data arranged in an array having the radial part along the first dimension, the beams along the second or second and third, and time steps and other optional dimensions along the last dimension (lenb,numb,numt).
linear	is TRUE if x is in linear volume backscatter values (sv) and FALSE if x is in logarithmic volume backscatter values (Sv).
TVG.exp	is the exponent of the eamotric spreading of the sound wave, theoretically 2 for Sv and 4 for TS.
Ro	is used in Gavins work, shifting the first voxel to be imaginarily placed inside of the sonar.
thr1m	Logical: If TRUE apply a rule that TVG closer than 1 m should not cause increasedd level (used in LSSS?))

arnejohannesholmin/SimradRaw documentation built on April 14, 2024, 7:43 p.m.