remove_noise

echopype.clean.remove_noise(ds_Sv, ping_num, range_sample_num, noise_max=None, SNR_threshold=3)

Remove noise by using estimates of background noise from mean calibrated power of a collection of pings.

Reference: De Robertis & Higginbottom. 2007. A post-processing technique to estimate the signal-to-noise ratio and remove echosounder background noise. ICES Journal of Marine Sciences 64(6): 1282–1291.

Parameters

ds_Svxr.Dataset

dataset containing Sv and echo_range [m]

ping_numint

number of pings to obtain noise estimates

range_sample_numint

number of samples along the range_sample dimension to obtain noise estimates

noise_maxfloat

the upper limit for background noise expected under the operating conditions

SNR_thresholdfloat

acceptable signal-to-noise ratio, default to 3 dB

Returns

The input dataset with additional variables, including

the corrected Sv (Sv_corrected) and the noise estimates (Sv_noise)