Level 4 data (velocity profilers)
From Atomix
| Page status: Draft | |
|---|---|
| Author(s): | Cynthia |
| Reviewer(s): | |
| Comment: | |
This will dictate the data required at the final processing level, where we store the estimated dissipation estimates [math]\displaystyle{ \varepsilon }[/math] along with quality metrics.
Dimensions
| Short name | Standard name | Dimensions | Comments |
|---|---|---|---|
| TIME | time | TIME | Units in Days since 1950-01-01T00:00:00Z. Provide a bounds attribute to designate the variable containing the limits of each segment (see CF-compliant example). |
| R_DIST | distance_from_sensor_along_beams | R_DIST | Along-beam bin centre distance (in meters) from the transducer |
| N_BEAM | unique_identifier_for_each_beam | N_BEAM | Array of 1 to number of beams (3 to 5 typically) |
| Optional dimensions for 5-beam ADCP | |||
| R_DIST5 | distance_from_sensor_along_beam_5 | R_DIST5 | Along-beam bin centre distance (in meters) from the transducer for the 5th vertical beam |
Variables
| Short name | Standard name | Dimensions | Comment |
|---|---|---|---|
| EPSI | specific_turbulent_kinetic_energy_
dissipation_in_water |
TIME, R_DIST, N_BEAM | Dissipation rate of turbulent kinetic energy per unit mass of water [W/kg] estimated from individual beams. |
| EPSI_FINAL | specific_turbulent_kinetic_energy_
dissipation_in_water |
TIME, N_BEAM | Final dissipation rate of turbulent kinetic energy per unit mass of water (beam-averaged). best to state cell_methods attribute to indicate what was averaged e.g., "cell_methods= N_BEAM:mean" for averages across beams. |
| Quality-control metrics | |||
| EPSI_FLAGS | specific_turbulent_kinetic_energy_
dissipation_in_water_status_flags |
TIME, R_DIST, N_BEAM | To be linked, when boolean flags defined |
| EPSI_CI_HIGH | high_confidence_limit_for_
specific_turbulent_kinetic_energy_dissipation_in_water |
TIME, R_DIST, N_BEAM | Specify how error was computed. |
| EPSI_CI_LOW | low_confidence_limit_for_
specific_turbulent_kinetic_energy_dissipation_in_water |
TIME, R_DIST, N_BEAM | Specify how error was computed. |
| R_MAX | TIME, R_DIST, N_BEAM | help! | |
| REGRESSION_COEFF_A0 | TIME, R_DIST, N_BEAM | help! | |
| REGRESSION_COEFF_A1 | TIME, R_DIST, N_BEAM | help! | |
| REGRESSION_R2 | TIME, R_DIST, N_BEAM | help! | |
| REGRESSION_N | structure_function_regression_number_of_observations | TIME, R_DIST, N_BEAM | Note the CF-compliant standard name modifier "number_of_observations" |
| Optional dimensions for 5-beam ADCP | |||
| Enter variables here or create a footnote (note that N_BEAM disappears as a dimension for the 5th beam) | TIME, R_DIST5 | ||
|
[math]\displaystyle{ \dagger\dagger }[/math] Variable required only when measuring in bursts e.g., 18 min of continuous measurements every hour. | |||
Return to Level 3 structure function
Go back to the beginning Dataset requirements for ADCP structure function
