Dataset Information

Conventions: CF-1.6
Metadata_Conventions: Unidata Dataset Discovery v1.0
featureType: trajectory
cdm_data_type: Trajectory
standard_name_vocabulary: CF-1.6
title: drifter data megapex 2014
summary: drifter data as measured during the megapex 2014 field campaign at the Sand Motor, Netherlands.
source: GPS-tracked drifters
platform: drifter
instrument: GT31 gps
uuid:
sea_name: North Sea
id: drifters_flood_23_09_2014
naming_authority: tudelft.nl
time_coverage_start: 2014-09-23T14:10:40Z
time_coverage_end: 2014-09-23T15:32:04Z
time_coverage_resolution: 1 second
geospatial_lat_min: 52.05711666666666
geospatial_lat_max: 52.064476666666664
geospatial_lat_units: degrees_north
geospatial_lat_resolution: 1.6666666482478831E-6
geospatial_lon_min: 4.183255
geospatial_lon_max: 4.195736666666666
geospatial_lon_units: degrees_east
geospatial_lon_resolution: 1.6666666660114515E-6
institution: Delft University of Technology
creator_name: Max Radermacher
creator_url: http://www.naturecoast.nl/
creator_email: m.radermacher@tudelft.nl
project: STW NatureCoast
processing_level: preliminary
references:
keywords_vocabulary:
keywords:
acknowledgment: STW NatureCoast
comment:
contributor_name: Wilmar Zeelenberg
contributor_role: Performing drifter deployments
date_created: 2017-01-22T15:32:41Z
date_modified: 2017-01-22T15:32:41Z
date_issued: 2017-01-22T15:32:41Z
publisher_name: Max Radermacher
publisher_email: m.radermacher@tudelft.nl
publisher_url: http://www.naturecoast.nl/
history: Data collected on 23-Sep-2014. Processed with script process_drifterlog.m on 22-Jan-2017. Netcdf file created 2017-01-22T15:32:41Z.
license: DISCLAIMER: This data is made available in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
metadata_link: 0

Variables in this Dataset

trajectory: Array of 32 bit Integers [trajectory = 0..4884]
  • long_name: Unique identifier for each feature instance
  • cf_role: trajectory_id
time: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: epoch time
  • standard_name: time
  • units: seconds since 1970-01-01 00:00:00 0:00
  • calendar: julian
  • axis: T
  • ancillary_variables:
  • comment:
lat: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: latitude
  • standard_name: latitude
  • units: degrees_north
  • axis: Y
  • valid_min: 52.05711666666666
  • valid_max: 52.064476666666664
  • ancillary_variables:
  • comment:
lon: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: longitude
  • standard_name: longitude
  • units: degrees_east
  • axis: X
  • valid_min: 4.183255
  • valid_max: 4.195736666666666
  • ancillary_variables:
  • comment:
x: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: x RD
  • standard_name: projection_x_coordinate
  • units: m
  • axis: X
  • valid_min: 72432.28236749313
  • valid_max: 73299.86047510499
  • ancillary_variables:
  • comment:
y: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: y RD
  • standard_name: projection_y_coordinate
  • units: m
  • axis: Y
  • valid_min: 452772.9087769903
  • valid_max: 453579.4960153929
  • ancillary_variables:
  • comment:
uv: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: velocity magnitude
  • standard_name: None
  • units: m s^-1
  • scale_factor: 1.0
  • add_offset: 0.0
  • valid_min: 0.0
  • valid_max: 2.5773666699026934
  • coordinates: time y x
  • grid_mapping: crs
  • source: GT31 GPS logger
  • references:
  • cell_methods:
  • ancillary_variables:
  • comment:
vel_dir: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: velocity direction
  • standard_name: direction_of_sea_water_velocity
  • units: degree
  • scale_factor: 1.0
  • add_offset: 0.0
  • valid_min: -180.0
  • valid_max: 180.0
  • coordinates: time y x
  • grid_mapping: crs
  • source:
  • references:
  • cell_methods:
  • ancillary_variables:
  • comment: Determined from displacements in x and y. Direction at t = n is determined from offset between x(n) and x(n+1). Last entry is set to nan.
u: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: u velocity
  • standard_name: sea_water_x_velocity
  • units: m s^-1
  • scale_factor: 1.0
  • add_offset: 0.0
  • valid_min: -1.3779098154181393
  • valid_max: 2.55189649392718
  • coordinates: time y x
  • grid_mapping: crs
  • source:
  • references:
  • cell_methods:
  • ancillary_variables:
  • comment: Determined from velocity magnitude and velocity direction.
v: Array of 64 bit Reals [trajectory = 0..4884][obs = 0..10]
  • long_name: v velocity
  • standard_name: sea_water_y_velocity
  • units: m s^-1
  • scale_factor: 1.0
  • add_offset: 0.0
  • valid_min: -2.065014333449106
  • valid_max: 1.692290187226224
  • coordinates: time y x
  • grid_mapping: crs
  • source:
  • references:
  • cell_methods:
  • ancillary_variables:
  • comment: Determined from velocity magnitude and velocity direction.
id: Array of 64 bit Reals [obs = 0..10]
  • long_name: drifter number
  • standard_name: None
  • units: None
  • scale_factor: 1.0
  • add_offset: 0.0
  • valid_min: 1.0
  • valid_max: 13.0
  • coordinates: time y x
  • grid_mapping: crs
  • source:
  • references:
  • cell_methods:
  • ancillary_variables:
  • comment:
crs: 32 bit Integer
  • grid_mapping_name: oblique_stereographic
  • epsg_code: EPSG:28992
  • semi_major_axis: 6377397.155
  • semi_minor_axis: 6356078.96282
  • inverse_flattening: 299.1528128
  • latitude_of_projection_origin: 52.0922178
  • longitude_of_projection_origin: 5.23155
  • scale_factor_at_projection_origin: 0.9999079
  • false_easting: 155000.0
  • false_northing: 463000.0
  • proj4_params: +proj=sterea +lat_0=52.15616055555555 +lon_0=5.38763888888889 +k=0.999908 +x_0=155000 +y_0=463000 +ellps=bessel +units=m +towgs84=565.4174,50.3319,465.5542,-0.398957388243134,0.343987817378283,-1.87740163998045,4.0725 +no_defs

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