Dataset: cp_decibels
Deployment: AL9801

AL9801 acoustic backscatter relative decibels, Georges Bank, 1998
Principal Investigator: 
Peter H. Wiebe (Woods Hole Oceanographic Institution, WHOI)
BCO-DMO Data Manager: 
Ms Dicky Allison (Woods Hole Oceanographic Institution, WHOI BCO-DMO)

These relative decibel values are the result of processing the AL9801 Greene Bomber volume backscatter at 120KHz. They are relative decibel values derived from the backscatter data (in volts) and normalized according to the algorithms in the Matlab routine docurtainnf.m. The algorithm includes the following steps:

  1. Add 10 to each value
  2. Multiply result by 1010 to get values with units of m2/m3 (called sv)
  3. Take the log (called SV)

These are energy backscattering values.

The values are presented as twenty groups of 20 numbers in each group. Each number is displayed as NNN, where there is an assumed decimal point at NN.N and all values should be negated. That is NNN, is really -NN.N.

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