Wedge_volume_sampled

This analysis variable calculates the volume of a wedge which includes the analysis domain. Wedge_volume_sampled can be used for single target analysis. Refer to Beam angle parameters for information about adjusting the across-track beam angle and the calibration setting WedgeVolumeBeamAngle.

The wedge volume of a single ping within the analysis domain is calculated as:

   

where:

l
= the length of the analysis domain (as measured along the cruise track, see notes below) (m)
N
= The number of pings in the analysis domain being analyzed (-)
f
= the across track beam angle, specified on the Calibration page of the Variable Properties dialog box. By default the value is obtained from the MajorAxis3dBBeamAngle. However, in situations where
the across track beam angle is not the same as the Major axis 3dB beam angle, the setting
WedgeVolumeBeamAngle can be specified to override MajorAxis3dBBeamAngle.
Ri
= the range (measured along the beam axis of the ping) of a transition between in-domain and out-of-domain space (m)
R0
= the range (measured along the beam axis of the ping) to the start of the analysis domain (m)
Rn
= the range (measured along the beam axis of the ping) to the end of the analysis domain (m)
delta i = big brace

0 if the interval between Ri and R i+1 is:

  1. above an Exclude above line

and/or

  1. below an Exclude below line

and/or

  1. contains no-data samples and Include the volume of no-data samples is not selected

and/or

  1. within a bad data (no-data) region and Include the volume of bad data (no-data) regions is not selected
  2. Note: No-data samples may occur in a number of ways (no-data samples, samples within
    applied bad data (no data) regions and samples in pings with a bad line status).
    For further information refer to About analysis domains: Analysis based on regions and samples.
1 Otherwise

Note: Generally, for Single target analysis, the setting Include the volume of bad data (no-data) regions should be unselected.

 

where:

N     = The number of pings in the analysis domain being analyzed
Vp    = The volume of ping p - as above (m3)

Notes:

See also

About analysis domains
Beam_volume_sum

About single targets: Analysis
Beam angle parameters