Flag observations that should be trimmed from beginning and end of deployment

A change in sensor_depth_below_surface_m greater than depth_threshold at the beginning or end of the deployment will trigger a flag of 4. This assumes that the sensor was recording before or after the ADCP was deployed. Observations of all variables at this timestamp should be filtered out of the data set.

Usage

adcp_start_end_obs_to_trim(dat, depth_threshold = 1, return_depth_diff = FALSE)

Arguments

dat

Data frame of current data for a single deployment in wide format.

depth_threshold

The change in sensor_depth_below_surface_m that will trigger a flag of 4 (in metres). Default is 1.0 m.

return_depth_diff

Logical argument indicating whether to return the column of depth_diff = abs(lead(sensor_depth_below_surface_m) - sensor_depth_below_surface_m).

Value

Returns dat with the flag column trim_flag_sensor_depth_below_surface_m (and optionally depth_diff.

Details

Only looks at the first three and last three observations.