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

Short name	Standard name	Dimensions
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.

Short name	Standard name	Dimensions
PRES		TIME, N_VEL_INSTRUMENT
SNR		TIME, N_VEL_COMPONENT
TEMP, and other scalars*		TIME
*Data from concurrent sensors may also be optionally included e.g., temperature, dissolved oxygen (e.g., eddy-correlation system)

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