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 | |
| geospatial_lat_max | |
| geospatial_lon_min | |
| geospatial_lon_max | |
| 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 | |
| principal_investigator | |
| authors | |
| contact | |
| project_name | |
| cruise | |
| vessel | |
| source | From the SeaVoX Platform Categories vocabulary (L06) list, e.g. “subsurface mooring”, ”ship”, ""sub-surface gliders"", ""autonomous underwater vehicle"" (CF) |
| references | |
| keywords | |
| creator_name | |
| creator_email | |
| creator_url | |
| acknowledgement | |
| station_name |
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