DOI: 10.6084/m9.figshare.29286578.v3
title: AEON Fine-Scale Acoustic Survey (FSAS) Raw Data

description: FSAS datasets are shown by the collection site and date measurements were performed; see associated cruise reports for cruise-specific information on how and when these data were collected. Generally, FSAS grids are composed of 4 to 5 line transects, with the survey grid centered on the bottom-lander at the given AEON site. Transducer depth is set to 1 m below the surface, the approximate depth at which the towfish (to which the transducers were mounted) was towed.Each .csv file is the survey data at a single frequency, for all transect lines. The naming convention of each file is as follows, with periods separating each component:<br>Date = start date (2022.01.08)Cruise = ship name (Warren, Beast, etc.)<br>Site = three letter site code (WIB, etc.)FSAS number = Assigned FSAS number per cruise, as listed in cruise log (FSAS1)<br>Freq = three digit frequency (120kHz)<br>Export bin dimensions = 005mvert_100mhorz<br>Each .csv contains the following variables:<br>Process ID = ID number per exportInterval = Cell column<br>Layer = Cell rowS<sub>V</sub>_mean = Mean S<sub>V</sub> in the cell (dB re 1m<sup>-1</sup>)<br>NASC = Nautical area scattering coefficient (m<sup>2</sup>nmi<sup>-2</sup>) for the cellS<sub>V</sub>_max = Maximum Sv in the cell (dB re 1m<sup>-1</sup>)<br>S<sub>V</sub>_min = Minimum Sv in the cell (dB re 1m<sup>-1</sup>)S<sub>V</sub>_noise = Mean noise Sv in the cell (dB re 1m<sub>-1</sub>)<br>Depth_mean = Mean depth of the cell (m)Ping_M = Ping number of middle ping in the cell<br>Dist_M = GPS-measured distance from first ping to middle ping in the cell (m)Date_M = Date of middle ping in the cell (YYYYMMDD)<br>Time_M = Time of middle ping in the cell (UTC)Lat_M = Latitude of middle ping in the cell (decimal degrees)<br>Lon_M = Longitude of middle ping in the cell (decimal degrees)Program_version = Echoview software version number<br>Processing_version = File format version used for analysis (value = 3 since Echoview 1.40)Processing_date = Date on which the data were exported (YYYYMMDD)<br>Processing_time = Time at which the data were exported (EST)Alpha = Absorption coefficient from calibration file (dB/m)<br>Gain_constant = Value of echosounder calibration constant (dB re 1m<sup>2</sup>/m<sup>3</sup>)Noise_Sv_1m = Background noise at 1m (dB re 1m<sup>2</sup>/m<sup>3</sup>)<br>ABC = Area backscattering coefficient for the cell (m<sup>2</sup>m<sup>-2</sup>)Thickness_mean = Mean extent along the beam axis of cell (m)<br>Frequency = Echosounder frequency value (kHz)<br>This collection represents the data collected from the Acoustic and Environmental Observation Network (AEON) in the U.S. Northwest Atlantic, developed and deployed 2021. The AEON network of five observation nodes complements existing oceanographic monitoring infrastructure in the Gulf of Maine. The observatory network provides simultaneous, long-term monitoring of soundscapes and multiple acoustically-relevant parameters such as marine mammal behavior and prey concentration at key locations where changes in the Labrador and Gulf Stream currents are projected to affect the Gulf of Maine.The lead P.I. for this project is Dr. Jennifer Miksis-Olds, University of New Hampshire (UNH). Dr. Miksis-Olds leads a collaborative research team consisting of individuals from UNH, JASCO Applied Sciences, Stony Brook University, and other associates.Please cite these data as Jennifer Miksis-Olds, AEON PI, University of New Hampshire with funding from U.S. Department of Defense, Office of Naval Research Awards N00014-20-1-2312, N00014-23-12767, N00014-24-12740.Raw data [including detailed metadata] are archived at the NOAA National Centers for Environmental Information :<br>Active Acoustic raw data, https://www.ncei.noaa.gov/maps/water-column-sonar/<br>Passive Acoustic raw data, https://www.ncei.noaa.gov/maps/passive_acoustic_data/<br>The AEON network in the Gulf of Maine totals 5 observation nodes. Datasets are indicated by siteAEON1 NEC, Northeast Channel, CanadaAEON2 ECS, Eastern Coastal Shelf, CanadaAEON3 GEB, Georges Basin, USAEON4 JOB, Jordan Basin, USAEON5 WIB, Wilkinson Basin, USSampling period is reflected as "Deploy date-Recovery date" (e.g., Jan2022-Feb2023 was deployed January 2022 and recovered February 2023).<b>Dataset manifest:</b>Research Cruise 2: Jasco dataset 1: Feb 2021 thru July 2021 (AEON4 JOB, AEON5 WIB)Research Cruise 3: Jasco dataset 2: July 2021 thru Jan 2022 (AEON3 GEB, AEON4 JOB, AEON5 WIB)Research Cruise 4: Jasco dataset 3: Jan 2022 thru Dec 2022 (AEON1 NEC, AEON2 ECS, AEON3 GEB, AEON4 JOB, AEON5 WIB)Research Cruise 5: Jasco dataset 4: Feb 2023 thru Feb 2024 (AEON1 NEC, AEON2 ECS, AEON3 GEB) and Dec 2022 thru Dec 2023 (AEON4 JOB, AEON5 WIB)Research Cruise 6: Jasco dataset 5: Mar/Apr 2024 thru Apr 2025 (AEON1 NEC, AEON2 ECS, AEON3 GEB, AEON5 WIB)Research Cruise 7 is planned for April 2026Project Website is:<br>https://eos.unh.edu/aeon<br>Contact: "Jennifer Miksis-Olds"<br>See also: https://eos.unh.edu/center-acoustics-research-education<br>Data are supplied as-is and no warranty is made, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty.