Level 1 data (velocity point-measurements): Difference between revisions

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* Some manufacturers record corr and amplitude for each beam or in the instrument coordinate system. Nortek records these variables in the instrument XYZ frame of reference.
* Some manufacturers record quality-control variables (e.g., CORRN) in the instrument coordinate system. For example, Nortek records these variables in the instrument XYZ frame of reference. It's best to record the data in that coordinate system.
* <math>\doubledagger</math> A variable situating the instruments in the water column is required. This may be a nominal depth/height or a time-varying depth or height above the bottom
* <math>\dagger</math> A variable situating the instruments in the water column is required. This may be a nominal depth/height or a time-varying depth or height above the bottom.


===Optional variables===
===Optional variables===

Revision as of 03:15, 14 December 2021

Dimensions


Short name Standard name Dimensions Description
TIME time time Units in Days since 1950-01-01T00:00:00Z
TIME_HPR*** time_of_heading_pitch_roll TIME_HPR Heading, pitch and roll (tilt) sensors measure always at 1Hz for Vector ADV
N_VEL_COMPONENT number_of_unique_velocity_instruments N_VEL_COMPONENT Maximum of 3 for u,v, w (east,north, up) velocities
N_VEL_INSTRUMENT number_of_velocity_component N_VEL_INSTRUMENT Required only if storing multiple synchronised instruments in the same file

Variables

Required variables

Short name Standard name Dimensions Description
ABSIC backscatter_intensity_from_acoustic_beam TIME, N_VEL_COMPONENT, N_VEL_INSTRUMENT
CORRN noise_correlation_percent_from_each_acoustic_beam TIME, N_VEL_COMPONENT, N_VEL_INSTRUMENT
XYZ_VEL* (or ENU_VEL/BEAM_VEL) TIME, N_VEL_COMPONENT, N_VEL_INSTRUMENT
HEIGHT or DEPTH variable[math]\displaystyle{ \dagger }[/math] TIME, N_VEL_INSTRUMENT
HEADING TIME_HPR, N_VEL_INSTRUMENT
PITCH TIME_HPR, N_VEL_INSTRUMENT
ROLL TIME_HPR, N_VEL_INSTRUMENT
  • Some manufacturers record quality-control variables (e.g., CORRN) in the instrument coordinate system. For example, Nortek records these variables in the instrument XYZ frame of reference. It's best to record the data in that coordinate system.
  • [math]\displaystyle{ \dagger }[/math] A variable situating the instruments in the water column is required. This may be a nominal depth/height or a time-varying depth or height above the bottom.

Optional variables

Short name Standard name Dimensions Description
Content Goes In
Here Please

Group attributes (metadata)

This section describes attributes that may provide additional information about how the data was processed and manipulated at this stage.

Required metadata

  • Att 1
  • Att2

Optional metadata

  • Enter here
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