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Global Attributes:	title: DUNEX microSWIFT drifter - Mission 81 summary: University of Washington - Applied Physics Lab team collected these data using microSWIFT wave buoys at the USACE Field Research Facility as part of the USCRP funded project DUNEX (During Nearshore Events Experiment). The file contains both directly measured and computed quantities from the drifting wave buoys. The collection and processing of these data is explained in the github repository at https://github.com/SASlabgroup/DUNEXMainExp along with examples of how these data can be used. institution: University of Washington - Applied Physics Lab source: Observations from microSWIFT drifters deployed in the DUring Nearshore Events eXperiment (DUNEX) Conventions: CF-1.6 Metadata_Conventions: Unidata Dataset Discovery v1.0 creator_country: USA creator_email: erainvil@uw.edu creator_name: EJ Rainville, Jim Thomson, Melissa Moulton, and Morteza Derakhti at University of Washington - Applied Physics Lab creator_phone: (303) 653-1226 creator_sector: academic creator_state: Washington featureType: trajectory cdm_data_type: Trajectory platform: microSWIFT wave buoy publisher_country: USA publisher_email: frfwebmaster@usace.army.mil publisher_name: USACE/CHL/COAB history: 2023-01-25 01:10:22.057797 Python references: https://github.com/SASlabgroup/microSWIFT and https://github.com/SASlabgroup/DUNEXMainExp acknowledgement: These data were collected as part of the During Nearshore Event Experiment (DUNEX), which was facilitated by the U.S. Coastal Research Program (USCRP). We thank USCRP for their support of this effort through funding for logistics and coordination. We also thank the U.S. Army Engineer Research and Development Center's Field Research Facility for the use of their facility and support staff. We would like to specifically thank Patrick Dickhudt, Mike Forte, Spicer Bak, the Town of Duck surf rescue, and many others at the field research facility for all the help they provided in collection and publication of these data. license: Data are intended for scholarly use by the research community, with the express agreement that users will properly acknowledge the U.S. Coastal Research Program (USCRP). Use or reproduction of these data for commercial purposes is prohibited without prior written permission. contributor_names: Emily Iseley, EJ Rainville, Jake Davis, Jim Thomson and Morteza Derakhti contributor_role: Data Collectors deployment_method: pier drop array_type: cross shore line mission_start_time: 2021-10-29T16:03:00 mission_end_time: 2021-10-29T16:16:30 deployment_notes: Awesome last deployment - super rainy and so much fun! data_cleaning_notes: Mission 81(Cleaned on 02/15/22): Adjusted the end time from 2021-10-29T16:25:00 to 2021-10-29T16:16:30 since almost all of the microSWIFTs were on the beach at this point as seen by the cutoffs from the spatial mask Removed microSWIFT 40 since it has a suspicious sweeping gyroscope measurement Removed microSWIFT 72 since it is missing GPS data during the mission Removed microSWIFT 41 since it is missing GPS data during the mission Removed microSWIFT 43 since it had a bad z-axis gyroscope Removed microSWIFT 58 since it has a bad gyroscope Removed microSWIFT 48 since it is missing GPS data Removed microSWIFT 26 since it is missing GPS data

Variables:	time: Array of 64 bit Reals [time = 0..9720] time: units: seconds since 1970-01-01 00:00:00 calendar: gregorian standard_name: time long_name: time
	trajectory: Array of 32 bit Integers [trajectory = 0..15] trajectory: cf_role: trajectory_id long_name: trajectory name description: microSWIFT drift track ID. The ID number is the same as the ID number of the microSWIFT wave buoy.
	gps_freq: Array of 32 bit Integers [single_value = 0..0] single_value: long_name: GPS module sampling frequency units: s-1
	imu_freq: Array of 32 bit Integers [single_value = 0..0] single_value: long_name: IMU module sampling frequency units: s-1
	latitude: Grid trajectory: time: data_level: Level 1 coordinates: time latitude longitude axis: Y units: degrees_north standard_name: latitude
	longitude: Grid trajectory: time: coordinates: time latitude longitude axis: X standard_name: longitude units: degrees_east data_level: Level 1
	acceleration_x_body: Grid trajectory: time: description: Acceleration across the major horizontal axis of the buoy in the reference frame of the buoy. coordinates: time latitude longitude long_name: X-axis acceleration in buoy reference frame units: m s-2 data_level: Level 1
	acceleration_y_body: Grid trajectory: time: description: Acceleration across the minor horizontal axis of the buoy in the reference frame of the buoy. coordinates: time latitude longitude long_name: Y-axis acceleration in buoy reference frame units: m s-2 data_level: Level 1
	acceleration_z_body: Grid trajectory: time: description: Acceleration across the vertical axis of the buoy in the reference frame of the buoy (positive is down). coordinates: time latitude longitude long_name: Z-axis acceleration in buoy reference frame units: m s-2 data_level: Level 1
	rotation_rate_x: Grid trajectory: time: units: degrees s-1 data_level: Level 1 coordinates: time latitude longitude long_name: X-axis gyroscope measurements in buoy reference frame description: Rotation rate around the major horizontal axis of the buoy.
	rotation_rate_y: Grid trajectory: time: data_level: Level 1 coordinates: time latitude longitude long_name: Y-axis gyroscope measurements in buoy reference frame description: Rotation rate around the minor horizontal axis of the buoy. units: degrees s-1
	rotation_rate_z: Grid trajectory: time: description: Rotation rate around the vertical axis of the buoy. units: degrees s-1 data_level: Level 1 coordinates: time latitude longitude long_name: Z-axis gyroscope measurements in buoy reference frame
	magnetic_flux_density_x: Grid trajectory: time: data_level: Level 1 coordinates: time latitude longitude long_name: X-axis magnetic flux density measurements in buoy reference frame description: Magnetic flux density along the major horizontal axis of the buoy. units: uTesla
	magnetic_flux_density_y: Grid trajectory: time: description: Magnetic flux density along the minor horizontal axis of the buoy. units: uTesla data_level: Level 1 coordinates: time latitude longitude long_name: Y-axis magnetic flux density measurements in buoy reference frame
	magnetic_flux_density_z: Grid trajectory: time: coordinates: time latitude longitude long_name: Z-axis magnetic flux density measurements in buoy reference frame description: Magnetic flux density along the major horizontal axis of the buoy. units: uTesla data_level: Level 1
	acceleration_ns: Grid trajectory: time: description: Acceleration in the North-South direction in the Earth reference frame. This is a Level 2 data product that has been rotated by the MATLAB AHRS indirect Kalman filter (https://www.mathworks.com/help/fusion/ref/ahrsfilter-system-object.html) and despiked using a PCHIP interpolation scheme(https://www.mathworks.com/help/matlab/ref/filloutliers.html). coordinates: time latitude longitude long_name: North-South acceleration in Earth reference frame units: m s-2 data_level: Level 2
	acceleration_ew: Grid trajectory: time: description: Acceleration in the East-West direction in the Earth reference frame. This is a Level 2 data product that has been rotated by the MATLAB AHRS indirect Kalman filter (https://www.mathworks.com/help/fusion/ref/ahrsfilter-system-object.html) and despiked using a PCHIP interpolation scheme(https://www.mathworks.com/help/matlab/ref/filloutliers.html). units: m s-2 data_level: Level 2 coordinates: time latitude longitude long_name: East-West acceleration in Earth reference frame
	acceleration_ud: Grid trajectory: time: description: Acceleration in the Up-Down direction in the Earth reference frame. This is a Level 2 data product that has been rotated by the MATLAB AHRS indirect Kalman filter (https://www.mathworks.com/help/fusion/ref/ahrsfilter-system-object.html) and despiked using a PCHIP interpolation scheme(https://www.mathworks.com/help/matlab/ref/filloutliers.html). Down is Positive. long_name: Up-Down acceleration in Earth reference frame units: m s-2 data_level: Level 2 coordinates: time latitude longitude
	velocity_ew: Grid trajectory: time: coordinates: time latitude longitude data_level: Level 1 long_name: East-West Velocity in Earth reference frame description: Velocity in the East-West direction measured from the GPS module. This is a Level 1 data product that has been despiked and linearly interpolated onto the time dimension. units: m s-1
	velocity_ns: Grid trajectory: time: coordinates: time latitude longitude long_name: North-South Velocity in Earth reference frame description: Velocity in the North-South direction measured from the GPS module. This is a Level 1 data product that has been despiked and linearly interpolated onto the time dimension. data_level: Level 1 units: m s-1
	velocity_ud: Grid trajectory: time: coordinates: time latitude longitude long_name: Up-Down Velocity in Earth reference frame description: Velocity in the Up-Down direction integrated from the Up-Down acceleration in the Earth reference frame. This is a Level 2 data product that has been integrated, filtered and despiked. units: m s-1 data_level: Level 2
	xFRF: Grid trajectory: time: description: This is the cross-shore coordinate in the local FRF coordinate system. Transformed from the measured GPS locations. units: m data_level: Level 1 coordinates: time latitude longitude long_name: x-coordinate in Local FRF Cartesian system
	yFRF: Grid trajectory: time: long_name: y-coordinate in Local FRF Cartesian system description: This is the along-shore coordinate in the local FRF coordinate system. Transformed from the measured GPS locations. units: m data_level: Level 1 coordinates: time latitude longitude
	sea_surface_elevation: Grid trajectory: time: description: This is the computed instantaneous sea surface elevation. This is a highly computed Level 2 data product. This is computed from the rotated Up-Down acceleration, double-integrated, filtered, and despiked. data_level: Level 2 coordinates: time latitude longitude long_name: Instantaneous sea surface elevation units: m

For questions or comments about this dataset, contact the administrator of this server [Spicer Bak] at: Spicer.Bak@usace.army.mil

For questions or comments about the OPeNDAP service bundled with the TDS, email THREDDS support at: support-thredds@unidata.ucar.edu

DDS:

Dataset {
    Float64 time[time = 9721];
    Int32 trajectory[trajectory = 16];
    Int32 gps_freq[single_value = 1];
    Int32 imu_freq[single_value = 1];
    Grid {
     ARRAY:
        Float64 latitude[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } latitude;
    Grid {
     ARRAY:
        Float64 longitude[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } longitude;
    Grid {
     ARRAY:
        Float64 acceleration_x_body[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } acceleration_x_body;
    Grid {
     ARRAY:
        Float64 acceleration_y_body[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } acceleration_y_body;
    Grid {
     ARRAY:
        Float64 acceleration_z_body[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } acceleration_z_body;
    Grid {
     ARRAY:
        Float64 rotation_rate_x[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } rotation_rate_x;
    Grid {
     ARRAY:
        Float64 rotation_rate_y[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } rotation_rate_y;
    Grid {
     ARRAY:
        Float64 rotation_rate_z[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } rotation_rate_z;
    Grid {
     ARRAY:
        Float64 magnetic_flux_density_x[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } magnetic_flux_density_x;
    Grid {
     ARRAY:
        Float64 magnetic_flux_density_y[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } magnetic_flux_density_y;
    Grid {
     ARRAY:
        Float64 magnetic_flux_density_z[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } magnetic_flux_density_z;
    Grid {
     ARRAY:
        Float64 acceleration_ns[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } acceleration_ns;
    Grid {
     ARRAY:
        Float64 acceleration_ew[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } acceleration_ew;
    Grid {
     ARRAY:
        Float64 acceleration_ud[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } acceleration_ud;
    Grid {
     ARRAY:
        Float64 velocity_ew[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } velocity_ew;
    Grid {
     ARRAY:
        Float64 velocity_ns[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } velocity_ns;
    Grid {
     ARRAY:
        Float64 velocity_ud[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } velocity_ud;
    Grid {
     ARRAY:
        Float64 xFRF[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } xFRF;
    Grid {
     ARRAY:
        Float64 yFRF[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } yFRF;
    Grid {
     ARRAY:
        Float64 sea_surface_elevation[trajectory = 16][time = 9721];
     MAPS:
        Int32 trajectory[trajectory = 16];
        Float64 time[time = 9721];
    } sea_surface_elevation;
} frf/projects/Dunex/UW_drifters/mission_81.nc;

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