remove_noise¶
-
echopype.preprocess.
remove_noise
(ds_Sv, ping_num, range_bin_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_Sv : xr.Dataset
dataset containing Sv and range [m]
- ping_num : int
number of pings to obtain noise estimates
- range_bin_num : int
number of samples along the
range_bin
dimension to obtain noise estimates- noise_max : float
the upper limit for background noise expected under the operating conditions
- SNR_threshold : float
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
)