second_filter_tekno {filteRjsats}

Two Hit Filter for Teknologic Detections

Description

This function takes a Teknologic detection dataframe generated from the add_fish() function and filters it a second time to remove any remaining multipath detections, and then check the remaining detections by comparing the time between each detection to ensure it is less 4x the stated pulse rate interval. It additionally checks that all detections have a frequency between 390 and 445 kHz and that the frequency of all detections are within 55kHz of each other. Called by second_filter_2h4h().

Usage

second_filter_tekno(fish_file)

Arguments

fish_file

a dataframe of detections retrieved from add_fish()

Value

A dataframe which has been filtered to remove false positives

Examples

# Apply the Teknologics filter to a prefiltered dataset with fish and tag
# attributes
second_filter_tekno(filter_fish_detects)