Netcdf meta data (shear probes)
From Atomix
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
| Parameter Name | Description |
|---|---|
| title | e.g., Vertical micostructure profiler data from cruise XXX |
| summary | required by ACDD |
| comment | required by CF |
| platform_type | research vessel, sub-surface glider etc |
| creation_time | yyyy-mm-ddTHH:MM:SSZ |
| date_created | yyyy-mm-ddTHH:MM:SSZ |
| date_update | yyyy-mm-ddTHH:MM:SSZ |
| time_reference_year | year for time reference |
| fs_fast | sampling frequency for fast channels |
| fs_slow [math]\displaystyle{ ^a }[/math] | sampling frequency for slow channels |
| profiling_direction | horizontal, vertical, glide |
| fft_length | as data points (note, fft_lengths_sec in seconds is optional) |
| diss_length | as data points |
| overlap | as data points |
| goodman | 0=not applied; 1=applied |
| HP_cut | the high-pass filter cutoff frequency in Hz. Can be zero for no filtering. |
| conventions | CF-1.6, ACDD-1.3, ATOMIX |
| history | Version 1 |
| data_mode | D #(D)elayed |
[math]\displaystyle{ ^a }[/math] or fast_ctd or similar if such records are included
Optional Metadata
| Parameter Name | Description |
|---|---|
| fft_length_sec | seconds |
| diss_length_sec | seconds |
| overlap_sec | seconds |
| f_AA | Hz, the anti-aliasing frequency. |
| FOM_limit | non-dimensional, if absent the FOM QC-flag is not set. Typically, 1.1. |
| 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%. |
| 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. |
| area | e.g., Arctic Ocean, Barents Sea |
| geospatial_lat_min | latitude minimum of data |
| geospatial_lat_max | latitude maximum of data |
| geospatial_lon_min | longitude minimum of data |
| geospatial_lon_max | longitude maximum of data |
| geospatial_vertical_min | 0 |
| geospatial_vertical_max | in m |
| geospatial_vertical_positive | down, up |
| time_coverage_start | yyyy-mm-ddTHH:MM:SSZ |
| time_coverage_end | yyyy-mm-ddTHH:MM:SSZ |
| institution | e.g. University of Bergen |
| principal_investigator | Name of Principal Investigator |
| authors | Names of authors |
| contact | email address of corresponding author (usually principal investigator) |
| project_name | 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 |
return to Dataset requirements for shear probes
