ERDDAP > info > noaaSanctSound_CI01_01_PSD_1h

Grid DAP Data	Sub- set	Table DAP Data	Make A Graph	W M S	Source Data Files	Acces- sible	Title	Sum- mary	FGDC, ISO, Metadata	Back- ground Info	RSS	E mail	Institution	Dataset ID
data			graph		files	public	NOAA-Navy Sanctuary Soundscapes Monitoring Project, Sound Pressure Spectral Density, Channel Islands CI01_01_PSD		I   M	background			NOAA NCEI	noaaSanctSound_CI01_01_PSD_1h

The Dataset's Variables and Attributes

Row Type	Variable Name	Attribute Name	Data Type	Value
attribute	NC_GLOBAL	acknowledgement	String	This project received funding from the U.S. Navy.
attribute	NC_GLOBAL	cdm_data_type	String	Grid
attribute	NC_GLOBAL	comment	String	Preliminary metadata, may change as project progresses
attribute	NC_GLOBAL	component	String	SoundTrap ST500
attribute	NC_GLOBAL	contributor_name	String	U.S. Navy
attribute	NC_GLOBAL	contributor_role	String	funding
attribute	NC_GLOBAL	Conventions	String	COARDS, CF-1.6, ACDD-1.3
attribute	NC_GLOBAL	creator_email	String	jejoseph at nps.edu
attribute	NC_GLOBAL	creator_name	String	US Naval Postgraduate School
attribute	NC_GLOBAL	creator_type	String	person
attribute	NC_GLOBAL	creator_url	String	https://www.oc.nps.edu/
attribute	NC_GLOBAL	date_created	String	2020-06-25
attribute	NC_GLOBAL	date_issued	String	2020-06-25
attribute	NC_GLOBAL	defaultGraphQuery	String	sound_pressure_spectral_density_levels[][]&.draw=surface&.vars=time|frequency|sound_pressure_spectral_density_levels&.yRange=||true|Log
attribute	NC_GLOBAL	history	String	Pressure spectral density (PSD) levels in units of 1 µPa^2/Hz were calculated using Welch's Method in Matlab (FFT length = 48000 points, Hann window length = 48000, FFT overlap = 0%), resulting in PSD estimates of mean-square pressure amplitude (µPa^2) with a frequency resolution of 1 Hz and temporal resolution of 1 second. For every 1-Hertz (Hz) frequency band from 20 Hz to 24,000 Hz, PSD levels per hour were calculated as the arithmetic mean of mean-square pressure amplitude (µPa^2) over an averaging window of 3600 seconds. PSD levels per hour for each frequency band were converted to decibels (dB re 1 µPa^2/Hz).
attribute	NC_GLOBAL	id	String	NOAA-NAVY-SanctSound_CI01_01_PSD_1h
attribute	NC_GLOBAL	infoUrl	String	https://www.ngdc.noaa.gov/mgg/pad/
attribute	NC_GLOBAL	institution	String	NOAA NCEI
attribute	NC_GLOBAL	keywords	String	acoustic, acoustics, ambient noise, aquatic ecosystems, attenuation, attenuation/transmission, centers, cetacean, channel, ci01, data, density, division, earth, Earth Science > Oceans > Ocean Acoustics > Acoustic Attenuation/Transmission, environmental, fish, frequency, information, intensity, islands, level, marine, marine environment monitoring, marine habitat, monitoring, national, national centers for environmental information, national marine fisheries service, navy, ncei, nesdis, nms, noaa, noaa-navy, ocean, ocean acoustics, oceans, office of national marine sanctuaries, passive acoustic recorder, physical, pressure, project, projectsound, psd, sanctsound, sanctuaries, sanctuary, satellite, science, sciences, sea, sea level, seawater, service, sound, sound_intensity_level_in_water, soundscapes, spectral, spectrum, time, transmission, u.s. department of commerce, water
attribute	NC_GLOBAL	keywords_vocabulary	String	GCMD Science Keywords
attribute	NC_GLOBAL	license	String	The data may be used and redistributed for free but is not intended for legal use, since it may contain inaccuracies. Neither the data Creator, NOAA, nor the United States Government, nor any of their employees or contractors, makes any warranty, express or implied, including warranties of merchantability and fitness for a particular purpose, or assumes any legal liability for the accuracy, completeness, or usefulness, of this information.
attribute	NC_GLOBAL	naming_authority	String	NOAA-NAVY
attribute	NC_GLOBAL	product_version	String	2020-04
attribute	NC_GLOBAL	project	String	NOAA Passive Acoustic Data
attribute	NC_GLOBAL	publisher_email	String	erd.data at noaa.gov
attribute	NC_GLOBAL	publisher_name	String	NOAA NMFS SWFSC ERD
attribute	NC_GLOBAL	publisher_type	String	institution
attribute	NC_GLOBAL	publisher_url	String	https://www.pfeg.noaa.gov
attribute	NC_GLOBAL	sensor	String	hydrophone
attribute	NC_GLOBAL	sourceUrl	String	(local files)
attribute	NC_GLOBAL	standard_name_vocabulary	String	CF Standard Name Table v70
attribute	NC_GLOBAL	summary	String	NOAA and the U.S. Navy are working to better understand underwater sound within the U.S. National Marine Sanctuary System. From 2018 to 2021, these agencies will work with numerous scientific partners to study sound within seven national marine sanctuaries and one marine national monument, which includes waters off Hawai'i and the east and west coasts. Standardized measurements will assess sounds produced by marine animals, physical processes (e.g., wind and waves), and human activities. Collectively, this information will help NOAA and the Navy measure sound levels and baseline acoustic conditions in sanctuaries. This work is a continuation of ongoing Navy (https://www.navymarinespeciesmonitoring.us) and NOAA (https://cetsound.noaa.gov/ons) monitoring and research, including efforts by NOAA's Office of National Marine Sanctuaries (https://sanctuaries.noaa.gov/science/sentinel-site-program/noise.html). This dataset represents the derived products from the raw acoustic data that are archived at NOAA's National Centers for Environmental Information (https://ngdc.noaa.gov/mgg/pad/)
attribute	NC_GLOBAL	time_coverage_end	String	2018-12-15T08:00:00Z
attribute	NC_GLOBAL	time_coverage_start	String	2018-10-31T22:00:00Z
attribute	NC_GLOBAL	title	String	NOAA-Navy Sanctuary Soundscapes Monitoring Project, Sound Pressure Spectral Density, Channel Islands CI01_01_PSD
dimension	time		double	nValues=1064, evenlySpaced=false, averageSpacing=1h 0m 10s
attribute	time	_CoordinateAxisType	String	Time
attribute	time	actual_range	double	1.5410232E9, 1.5448608E9
attribute	time	axis	String	T
attribute	time	ioos_category	String	Time
attribute	time	long_name	String	Time
attribute	time	standard_name	String	time
attribute	time	time_origin	String	01-JAN-1970 00:00:00
attribute	time	units	String	seconds since 1970-01-01T00:00:00Z
dimension	frequency		double	nValues=23981, evenlySpaced=true, averageSpacing=1.0
attribute	frequency	actual_range	double	20.0, 24000.0
attribute	frequency	comment	String	Frequency resolution of 1 Hz
attribute	frequency	ioos_category	String	Unknown
attribute	frequency	long_name	String	frequency
attribute	frequency	standard_name	String	sound_frequency
attribute	frequency	units	String	Hz
variable	sound_pressure_spectral_density_levels		double	time, frequency
attribute	sound_pressure_spectral_density_levels	colorBarMaximum	double	110.0
attribute	sound_pressure_spectral_density_levels	colorBarMinimum	double	50.0
attribute	sound_pressure_spectral_density_levels	comment	String	Power spectral density levels per hour were calculated as the arithmetic mean of mean-square pressure amplitude (µPa^2) over an averaging window of 3600 seconds and converted to decibels (dB re 1 µPa^2/Hz).
attribute	sound_pressure_spectral_density_levels	ioos_category	String	Pressure
attribute	sound_pressure_spectral_density_levels	long_name	String	Sound pressure spectrum level
attribute	sound_pressure_spectral_density_levels	standard_name	String	sound_intensity_level_in_water
attribute	sound_pressure_spectral_density_levels	units	String	dB

The information in the table above is also available in other file formats (.csv, .htmlTable, .itx, .json, .jsonlCSV1, .jsonlCSV, .jsonlKVP, .mat, .nc, .nccsv, .tsv, .xhtml) via a RESTful web service.