Netcdf meta data (shear probes): Difference between revisions

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{| class="wikitable sortable"
{| class="wikitable sortable"
|-
|-
! Parameter Name !! Description
! Attibute Name !! Description !! Convention
|-
|-
|title || E.g., Vertical micostructure profiler data from cruise XXX
|title || A comprehensive title for the dataset including the time and location aspect || CF, ACDD
|-
|-
|authors ||  Names of authors
|authors ||  A list of authors || ATOMIX
|-
|-
|summary || An abstract describing the dataset  
|summary || An abstract describing the dataset || ACCD
|-
|-
|comment|| Supplementary technical details about the collecting and processing of the dataset  
|comment|| Supplementary technical details about the collecting and processing of the dataset || CF, ACDD
|-
|-
|platform || The platform from which the data are collected. From the SeaVoX Platform Categories (L06) list,
|platform_type || The platform from which the data are collected, e.g., sub-surface mooring, research vessel, sub-surface glider || ACDD
e.g. sub-surface mooring, research vessel, sub-surface glider
|-
|-
|source || The instrument used for collecting the data. For example, vertical microstructure profiler, VMP2000 SN009.
|source || The instrument used for collecting the data. For example, vertical microstructure profiler, VMP2000 SN009 || CF, ACDD
|-
|-
|date_created || The date on which the data was created, yyyy-mm-ddTHH:MM:SSZ
|date_created || The date on which the data were created, yyyy-mm-ddTHH:MM:SSZ || ACDD
|-
|-
|date_modified || The date on which the data was last modified, yyyy-mm-ddTHH:MM:SSZ  
|date_modified || The date on which the data were last modified, yyyy-mm-ddTHH:MM:SSZ || ACDD
|-
|-
|time_reference_year || Year for time reference
|time_reference_year || Year for time reference || ATOMIX
|-
|-
|time_coverage_start || Time of the first data point in the dataset, yyyy-mm-ddTHH:MM:SSZ
|time_coverage_start || Time of the first data point in the dataset, yyyy-mm-ddTHH:MM:SSZ || ACDD
|-
|-
|time_coverage_end || Time of thelast data point in the dataset, yyyy-mm-ddTHH:MM:SSZ
|time_coverage_end || Time of thelast data point in the dataset, yyyy-mm-ddTHH:MM:SSZ ||ACDD
|-
|-
|geospatial_lat_min || Southern bound of data, decimal degrees, negative for South
|geospatial_lat_min || Southern bound of data, decimal degrees, negative for South || ACDD
|-
|-
|geospatial_lat_max || Northern bound of data, decimal degrees, negative for South
|geospatial_lat_max || Northern bound of data, decimal degrees, negative for South || ACDD
|-
|-
|geospatial_lon_min || Western bound of data, decimal degrees, negative for West
|geospatial_lon_min || Western bound of data, decimal degrees, negative for West || ACDD
|-
|-
|geospatial_lon_max || Eastern bound of data, decimal degrees, negative for West
|geospatial_lon_max || Eastern bound of data, decimal degrees, negative for West || ACDD
|-
|-
| fs_fast || Sampling frequency for fast (turbulence) channels
| fs_fast || Sampling frequency for fast (turbulence) channels || ATOMIX
|-
|-
| fs_slow <math>^a</math> || Sampling frequency for slow channels (if exist)
| fs_slow <math>^a</math> || Sampling frequency for slow channels (if exists). Alternative names could be, e.g., fs_CTD || ATOMIX
|-
|-
| profiling_direction || E.g., horizontal, vertical, or glide
| profiling_direction || Direction along which the section was collected, e.g., horizontal, vertical, or glide || ATOMIX
|-
|-
| fft_length ||  Length of the Fast Fourier transform segments (in data points; note, fft_lengths_sec in seconds is optional)
| fft_length ||  Length of the Fast Fourier transform segments (in data points; note, fft_lengths_sec in seconds is optional) || ATOMIX
|-
|-
| diss_length  || Length of data (in data points) used for each dissipation estimate
| diss_length  || Length of data (in data points) used for each dissipation estimate || ATOMIX
|-
|-
| overlap ||  Length of overlap (in data points) in diss_length
| overlap ||  Length of overlap (in data points) in diss_length || ATOMIX
|-
|-
| goodman  || Vibration coherent noise removal using the Goodman algorithm. 0=not applied; 1=applied
| goodman  || Flag for the vibration coherent noise removal using the Goodman algorithm. 0=not applied; 1=applied || ATOMIX
|-
|-
| HP_cut  || The high-pass filter cutoff frequency in Hz. Can be zero for no filtering.
| HP_cut  || The high-pass filter cutoff frequency in Hz. Can be zero for no filtering. || ATOMIX
|-
|-
| conventions || A comma-separated list of the conventions that are followed by the dataset. e.g., CF-1.6, ACDD-1.3, ATOMIX
| conventions || A comma-separated list of the conventions that are followed by the dataset. e.g., CF-1.6, ACDD-1.3, ATOMIX || CF, ACDD
|-
|-
| history || Provides an audit trail for modifications to the original data; e.g., Version 1
| history || Provides an audit trail for modifications to the original data; e.g., Version 1 | CF, ACDD
|}
|}
<math>^a</math> or fs_ctd or similar if such records are included
It is highly recommended to duplicate relevant attributes at the corresponding
group level. Attributes not listed in the Climate and Forecast (CF) and the Attribute Convention for Data Discovery (ACDD)
standards are labeled as ATOMIX.
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Revision as of 19:32, 24 May 2024


Below we list the metadata required in a NetCDF data file, as well as the optional meta data we highly recommend that are included with the data set.

The parameter names should be used as listed (attention to underscores). The descriptions are example text or several options that are available for that parameter.


Required Metadata


Attibute Name Description Convention
title A comprehensive title for the dataset including the time and location aspect CF, ACDD
authors A list of authors ATOMIX
summary An abstract describing the dataset ACCD
comment Supplementary technical details about the collecting and processing of the dataset CF, ACDD
platform_type The platform from which the data are collected, e.g., sub-surface mooring, research vessel, sub-surface glider ACDD
source The instrument used for collecting the data. For example, vertical microstructure profiler, VMP2000 SN009 CF, ACDD
date_created The date on which the data were created, yyyy-mm-ddTHH:MM:SSZ ACDD
date_modified The date on which the data were last modified, yyyy-mm-ddTHH:MM:SSZ ACDD
time_reference_year Year for time reference ATOMIX
time_coverage_start Time of the first data point in the dataset, yyyy-mm-ddTHH:MM:SSZ ACDD
time_coverage_end Time of thelast data point in the dataset, yyyy-mm-ddTHH:MM:SSZ ACDD
geospatial_lat_min Southern bound of data, decimal degrees, negative for South ACDD
geospatial_lat_max Northern bound of data, decimal degrees, negative for South ACDD
geospatial_lon_min Western bound of data, decimal degrees, negative for West ACDD
geospatial_lon_max Eastern bound of data, decimal degrees, negative for West ACDD
fs_fast Sampling frequency for fast (turbulence) channels ATOMIX
fs_slow [math]\displaystyle{ ^a }[/math] Sampling frequency for slow channels (if exists). Alternative names could be, e.g., fs_CTD ATOMIX
profiling_direction Direction along which the section was collected, e.g., horizontal, vertical, or glide ATOMIX
fft_length Length of the Fast Fourier transform segments (in data points; note, fft_lengths_sec in seconds is optional) ATOMIX
diss_length Length of data (in data points) used for each dissipation estimate ATOMIX
overlap Length of overlap (in data points) in diss_length ATOMIX
goodman Flag for the vibration coherent noise removal using the Goodman algorithm. 0=not applied; 1=applied ATOMIX
HP_cut The high-pass filter cutoff frequency in Hz. Can be zero for no filtering. ATOMIX
conventions A comma-separated list of the conventions that are followed by the dataset. e.g., CF-1.6, ACDD-1.3, ATOMIX CF, ACDD
history CF, ACDD

It is highly recommended to duplicate relevant attributes at the corresponding group level. Attributes not listed in the Climate and Forecast (CF) and the Attribute Convention for Data Discovery (ACDD) standards are labeled as ATOMIX.

Optional Metadata


Parameter Name Description
fft_length_sec seconds
diss_length_sec seconds
overlap_sec (for diss_length_sec) seconds
f_AA Hz, the anti-aliasing frequency.
FOM_limit non-dimensional, if absent the FOM QC-flag is not set. Typically, 1.15. It can be as large as 1.4.
diss_ratio_limit non-dimensional, if absent the dissipation ration QC-flag is not set. Typically, 2.77.
despike_shear_fraction_limit non-dimensional, if absent the de-spike fraction QC-flag is not set. Typically, 0.05.
despike_shear_iterations_limit non-dimensional, if absent the de-spike iteration passes QC-flag is not set. Typically 8.
variance_resolved_limit threshold for the minimum percent of variance resolved in a shear spectrum. Typically 50%.
spectral_model e.g., Nasmyth, Lueck or Panchev-Kesich
spectrum_std statistical uncertainty (standard deviation) of the natural logarithm of spectrum of shear
num_vibration_goodman number of vibration or acceleration time series used to clean the shear spectrum
f_limit upper limit to exclude frequencies that have contaminations. Typically infinity.
fit_2_isr dissipation threshold to use the method of fitting to the inertial subrange. Typically 10-5 W/kg.
eps_remove_top_meters if applicable, upper meters removed from dissipation estimates (e.g., because of ship)
area e.g., Arctic Ocean, Barents Sea
geospatial_vertical_min 0
geospatial_vertical_max in m
geospatial_vertical_positive down, up
institution e.g. University of Bergen
principal_investigator Name of Principal Investigator
contact email address of corresponding author (usually principal investigator)
project name of project for which the data was collected
cruise name of cruise from which the data was collected
vessel name of vessel from which the data was collected
source From the SeaVoX Platform Categories vocabulary (L06) list, e.g. “subsurface mooring”, ”ship”, ""sub-surface gliders"", ""autonomous underwater vehicle"" (CF)
references key references
keywords relevant keywords describing data e.g. shear probes
creator_name name of person who generated the file
creator_email email address of person who generated the file
creator_url website address of the creator
acknowledgement acknowledgements for this data. e.g. this could include crew of ship or funders
station_name name of station
license the URL to a standard or specific license,

e.g, http://creativecommons.org/licenses/by/4.0/, Freely Distributed, or None

return to Dataset requirements for shear probes

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