calc_absorption

echopype.utils.uwa.calc_absorption(frequency, distance=1000, temperature=27, salinity=35, pressure=10, pH=8.1, formula_source='AM')

Calculate sea absorption in dB/m

Parameters:

frequency : int or numpy array

frequency in Hz

distance : num

distance in m (FG formula only)

temperature : num

temperature in deg C

salinity : num

salinity in ppt

pressure : num

pressure in dbars

pH : num

pH of water

formula_source : str

Source of formula used for calculating sound speed. Default is to use Ainlie and McColm (1998) (formula_source='AM'). Another option is to the formula supplied by AZFP (formula_source='AZFP'). Another option is to use Francois and Garrison (1982) supplied by arlpy (formula_source='FG').

Returns:

Sea absorption [dB/m]