Subset the data | North Temperate Lakes

Please select what columns you would like to include from North Temperate Lakes LTER - Pelagic Prey Single Target - Sonar Data

Column	Definition	Unit
lakeid	lake name abbreviation
year4	year	nominalYear
sampledate	sample date
time_ping	time of ping
target_strength_corrected	target strength of single fish echoes after correction for location in the acoustic beam	decibel
target_strength_uncorrected	target strength of echoes without correction for location in the acoustic beam (raw single fish echoes)	decibel
angle_minor_axis	angle off minor axis	degree
angle_major_axis	angle off major axis	degree
pulselength_determ_level	the level at which the pulse length was determined. (PLDL) The level is measured down from the maximum of the echo pulse.	decibel
samples_above_pldl	the number of samples above the PLDL	number
pulselength_normalized_6db	length of the received echo pulse divided by the transmitted pulse length.	decibel
pulse_start_normalized_6db	start points of the pulse at 6dB PLDL level	decibel
transmitted_pulse_length	length of the transmitted pulse	millisecond
target_true_depth	true depth of single fish target corrected for position in the acoustic beam	meter

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National Science Foundation | LTER Network | Center for Limnology

This material is based upon work supported by the National Science Foundation under Cooperative Agreement #DEB-2025982, NTL LTER. Any opinions, findings, conclusions, or recommendations expressed in the material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.