calculate_uncertainty_ifremer

HSTB.kluster.modules.tpu.calculate_uncertainty_ifremer(depth_offset, acrosstrack_offset, quality_factor)

Use the kongsberg reported Ifremer quality factor to calculate horizontal and vertical sonar uncertainty. This is the quality factor type reported in the MRZ datagram in .kmall files, and in the quality factor datagram in .all files.

Currently, soundings that fail the Kongsberg qf calculation are given a qf of 0.0. Still need a good way to deal with that

Parameters

  • depth_offset (Union[DataArray, array]) – 2d array (time, beam) of depth offsets relative to the transducer

  • acrosstrack_offset (Union[DataArray, array]) – 2d array (time, beam) of across track offsets relative to the transducer

  • quality_factor (Union[DataArray, array]) – 2d array (time, beam) of Ifremer quality factor. Assumes it is given in the kongsberg way (QF = Est(dz)/z = 100*10^-IQF)

Returns

  • Union[xr.DataArray, np.array] – vertical uncertainty in meters for each sounding

  • Union[xr.DataArray, np.array] – horizontal uncertainty in meters for each sounding