DAP4 Data Request Form 50200057_decim_traj.nc
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OPeNDAP DAP4 Data Request Form

dataset: 50200057_decim_traj.nc
dmr

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Global Attributes
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      • NC_GLOBAL
        • seconds_offset: 25200.00000000000 (Type is Float64)
        • seconds_slope: 0.000000000000000 (Type is Float64)
        • bar_offset: 0.000000000000000 (Type is Float64)
        • bar_slope: 0.000000000000000 (Type is Float64)
        • yaw_offset: 0.000000000000000 (Type is Float64)
        • summary: Benthic Event Detector data from an in situ instrument designed to capture turbidity currents. Time adjusted with --seconds_offset 25200.0 Positions extracted from thalweg file ../MontereyCanyonBeds_1m+5m_profile.ssv between depths 433.476744778 and 436.12066775. Data read from input file(s) ['50200057.E00.OUT']. (Type is String)
        • netcdf_version: 3.6 (Type is String)
        • Conventions: CF-1.6 (Type is String)
        • date_created: 2019-08-12T23:01:53.554320Z (Type is String)
        • date_update: 2019-08-12T23:01:53.554320Z (Type is String)
        • date_modified: 2019-08-12T23:01:53.554320Z (Type is String)
        • featureType: trajectory (Type is String)
        • geospatial_lat_min: 36.79464717021277 (Type is Float64)
        • geospatial_lat_max: 36.79751508510638 (Type is Float64)
        • geospatial_lon_min: -121.8983550000000 (Type is Float64)
        • geospatial_lon_max: -121.8865990000000 (Type is Float64)
        • geospatial_lat_units: degree_north (Type is String)
        • geospatial_lon_units: degree_east (Type is String)
        • geospatial_vertical_min: 432.8744732376311 (Type is Float64)
        • geospatial_vertical_max: 437.3842318077398 (Type is Float64)
        • geospatial_vertical_units: m (Type is String)
        • geospatial_vertical_positive: down (Type is String)
        • comment: BED devices measure 3 axes of acceleration and rotation about those 3 axes at 50 Hz. They also measure pressure at 1 Hz during an event. Those data are represented in this file as variables XA, YA, ZA, XR, YR, ZR, and P. Additional variables are computed by the bed2netcdf.py program; see the long_name and comment attributes for explanations. Source code for the calucations are in the bed2netcdf.py, BEDS.py, and util.py files on the subversion source code control server at MBARI: http://kahuna.shore.mbari.org/viewvc/svn/BEDs/trunk/BEDs/Visualization/py/. (Type is String)
        • time_coverage_start: 2016-01-15T22:01:49Z (Type is String)
        • time_coverage_end: 2016-01-15T22:02:36.000011Z (Type is String)
        • distribution_statement: Any use requires prior approval from the MBARI BEDS PI: Dr. Charles Paull (Type is String)
        • license: Any use requires prior approval from the MBARI BEDS PI: Dr. Charles Paull (Type is String)
        • useconst: Not intended for legal use. Data may contain inaccuracies. (Type is String)
        • history: Created by "../bed2netcdf.py -i 50200057.E00.OUT -t ../MontereyCanyonBeds_1m+5m_profile.ssv --bed_name BED05 --seconds_offset 25200 --title BED05 Event Trajectory on 15 January 2016 during the Coordinated Canyon Experiment" on 2019-08-12T23:01:53.554320Z (Type is String)
        • title: BED05 Event Trajectory on 15 January 2016 during the Coordinated Canyon Experiment (Type is String)
Global Dimensions
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      [ /time = 0..235 ]
Variables
time[ /time= 0..235] (Type is Float64)
  • attributes
    • standard_name: time (Type is String)
    • long_name: Time(GMT) (Type is String)
    • units: seconds since 2013-01-01 00:00:00 (Type is String)
latitude[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: LATITUDE (Type is String)
    • standard_name: latitude (Type is String)
    • units: degree_north (Type is String)
    • comment: Latitude linearly intepolated onto thalweg data from file ../MontereyCanyonBeds_1m+5m_profile.ssv using formula np.interp(np.linspace(0,1,len(self.s2013)), np.linspace(0,1,len(self.traj_lat)), self.traj_lat) (Type is String)
longitude[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: LONGITUDE (Type is String)
    • standard_name: longitude (Type is String)
    • units: degree_east (Type is String)
    • comment: Longitude linearly intepolated onto thalweg data from file ../MontereyCanyonBeds_1m+5m_profile.ssv using formula np.interp(np.linspace(0,1,len(self.s2013)), np.linspace(0,1,len(self.traj_lon)), self.traj_lon) (Type is String)
depth[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: DEPTH (Type is String)
    • standard_name: depth (Type is String)
    • units: m (Type is String)
    • comment: Recorded pressure adjusted with bcal[BED05] = Polynomial(a=0.55, b=23.2, c=-12.09). Depth computed using UNESCO formula. Tide removed using output from: mbotps -A2 -B2016/01/15/15/01 -E2016/01/15/15/02 -D1 -R-121.890284808/36.7964235928 -Ombotps_out.txt Linearly interpolated to IMU samples. (Type is String)
XA[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Acceleration along X-axis (Type is String)
    • comment: Recorded by instrument (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: g (Type is String)
YA[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Acceleration along Y-axis (Type is String)
    • comment: Recorded by instrument (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: g (Type is String)
ZA[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Acceleration along X-axis (Type is String)
    • comment: Recorded by instrument (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: g (Type is String)
A[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Acceleration Magnitude (Type is String)
    • comment: Computed with: np.sqrt(self.ax**2 + self.ay**2 + self.az**2) (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: g (Type is String)
XR[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Rotation about X-axis (Type is String)
    • standard_name: platform_pitch_angle (Type is String)
    • comment: Converted from recorded Quaternion with Python euclid package Quaternion.get_euler() method (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: degree (Type is String)
YR[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Rotation about Y-axis (Type is String)
    • standard_name: platform_yaw_angle (Type is String)
    • comment: Converted from recorded Quaternion with Python euclid package Quaternion.get_euler() method (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: degree (Type is String)
ZR[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Rotation about Z-axis (Type is String)
    • standard_name: platform_roll_angle (Type is String)
    • comment: Converted from recorded Quaternion with Python euclid package Quaternion.get_euler() method (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: degree (Type is String)
AXIS_X[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: X-component of rotation vector (Type is String)
    • comment: Converted from recorded Quaternion measurement with Python euclid package Quaternion.get_angle_axis() method (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: (Type is String)
AXIS_Y[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Y-component of rotation vector (Type is String)
    • comment: Converted from recorded Quaternion measurement with Python euclid package Quaternion.get_angle_axis() method (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: (Type is String)
AXIS_Z[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Z-component of rotation vector (Type is String)
    • comment: Converted from recorded Quaternion measurement with Python euclid package Quaternion.get_angle_axis() method (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: (Type is String)
ANGLE[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Angle rotated about rotation vector (Type is String)
    • comment: Converted from recorded Quaternion measurement with Python euclid package Quaternion.get_angle_axis() method (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: radian (Type is String)
ROT_X[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: X-component of platform rotation vector (Type is String)
    • comment: Computed with dq = Quaternion(*quat) * Quaternion(*last_quat).conjugated(); dq.get_angle_axis() (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: (Type is String)
ROT_Y[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Y-component of platform rotation vector (Type is String)
    • comment: Computed with dq = Quaternion(*quat) * Quaternion(*last_quat).conjugated(); dq.get_angle_axis() (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: (Type is String)
ROT_Z[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Z-component of platform rotation vector (Type is String)
    • comment: Computed with dq = Quaternion(*quat) * Quaternion(*last_quat).conjugated(); dq.get_angle_axis() (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: (Type is String)
ROT_RATE[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Absolute rotation rate about rotation vector (Type is String)
    • comment: Computed from angle output from Quaternion.get_euler() and the angle difference from one time step to the next (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: degree/second (Type is String)
ROT_COUNT[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Rotation Count - Cumulative Sum of ROT_RATE * dt / 360 deg (Type is String)
    • comment: Computed with: np.cumsum(np.absolute(self.diffrot)) / 2. / np.pi (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
P[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Pressure (Type is String)
    • comment: Recorded pressure linearly interpolated to IMU samples with np.interp(self.s2013, self.ps2013, self.pr) (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: dbar (Type is String)
P_ADJUSTED[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Adjusted Pressure (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: dbar (Type is String)
    • comment: Recorded pressure adjusted with bcal[BED05] = Polynomial(a=0.55, b=23.2, c=-12.09) (Type is String)
BED_DEPTH_LI[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Depth of BED - Linearly Interpolated to IMU samples (Type is String)
    • units: m (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • comment: Recorded pressure adjusted with bcal[BED05] = Polynomial(a=0.55, b=23.2, c=-12.09). Depth computed using UNESCO formula. Tide removed using output from: mbotps -A2 -B2016/01/15/15/01 -E2016/01/15/15/02 -D1 -R-121.890284808/36.7964235928 -Ombotps_out.txt (Type is String)
P_SPLINE[ /time= 0..235] (Type is Float64)
  • attributes
    • _FillValue: 1.000000000000000e+20 (Type is Float64)
    • long_name: Pressure (Type is String)
    • comment: Recorded pressure cubic spline interpolated to IMU samples with spline_func = scipy.interpolate.interp1d(self.ps2013, self.pr, kind='cubic'); p_mask = ma.masked_less(ma.masked_greater(self.s2013, np.max(self.ps2013)), np.min(self.ps2013)); inside_spline = spline_func(ma.compressed(p_mask)); p_spline = spline_func(self.s2013); p_spline[ma.clump_unmasked(p_mask)] = inside_spline (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: dbar (Type is String)
P_SPLINE_RATE[ /time= 0..235] (Type is Float64)
  • attributes
    • _FillValue: 1.000000000000000e+20 (Type is Float64)
    • long_name: Rate of change of spline fit of pressure (Type is String)
    • comment: Pressure rate of change interpolated to IMU samples with p_spline_rate[ma.clump_unmasked(p_mask)] = np.append([0], np.diff(inside_spline)) * self.rateHz (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: dbar/s (Type is String)
BED_DEPTH_CSI[ /time= 0..235] (Type is Float64)
  • attributes
    • _FillValue: 1.000000000000000e+20 (Type is Float64)
    • long_name: Depth of BED - Cubic Spline Interpolated to IMU Samples (Type is String)
    • units: m (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • comment: Recorded pressure adjusted with bcal[BED05] = Polynomial(a=0.55, b=23.2, c=-12.09). Depth computed using UNESCO formula. Tide removed using output from: mbotps -A2 -B2016/01/15/15/01 -E2016/01/15/15/02 -D1 -R-121.890284808/36.7964235928 -Ombotps_out.txt Cubic spline interpolated to IMU samples. (Type is String)
P_RATE[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Rate of change of pressure (Type is String)
    • comment: Pressure rate of change interpolated to IMU samples with np.append([0], np.diff(np.interp(self.s2013, self.ps2013, self.pr))) * self.rateHz (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: dbar/s (Type is String)
ROT_DIST[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Implied distance traveled assuming pure rolling motion (Type is String)
    • comment: Computed with: ROT_COUNT * 1.47 m (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: m (Type is String)
IMPLIED_VELOCITY[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Implied BED velocity assuming pure rolling motion (Type is String)
    • comment: Computed with: ROT_RATE * 1.47 / 360.0 (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: m/s (Type is String)
DIST_TOPO[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Distance over topography along thalweg (Type is String)
    • units: m (Type is String)
    • comment: dist_topo linearly intepolated onto thalweg data from file ../MontereyCanyonBeds_1m+5m_profile.ssv using formula np.interp(np.linspace(0,1,len(self.s2013)), np.linspace(0,1,len(self.traj_dist_topo)), self.traj_dist_topo) (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
TUMBLE_RATE[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Angle change of axis (vec) in axis-angle representation of BED rotation (Type is String)
    • comment: Computed with: abs(last_vec.angle(vec)) (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: degree/second (Type is String)
TUMBLE_COUNT[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Tumble Count - Cumulative Sum of TUMBLE_RATE * dt / 360 deg (Type is String)
    • comment: Computed with: np.cumsum(np.absolute(self.difftumble)) / 2. / np.pi (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
TUMBLE_DIST[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Implied distance traveled assuming tumbling translates to horizontal motion (Type is String)
    • comment: Computed with: TUMBLE_COUNT * 1.47 m (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: m (Type is String)
ROT_PLUS_TUMBLE_DIST[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: Implied distance traveled assuming pure rolling motion (Type is String)
    • comment: Computed with: ROT_DIST + TUMBLE_DIST (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • units: m (Type is String)
TIDE[ /time= 0..235] (Type is Float64)
  • attributes
    • long_name: OSTP2 Tide model height (Type is String)
    • coordinates: time depth latitude longitude (Type is String)
    • comment: Computed with command: mbotps -A2 -B2016/01/15/15/01 -E2016/01/15/15/02 -D1 -R-121.890284808/36.7964235928 -Ombotps_out.txt (Type is String)
    • units: m (Type is String)
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