Acoustic backscatter data in relative decibels (one of three related datasets) from the AL9801 cruise on the R/V Albatross IV in the Gulf of Maine and Georges Bank in 1998 (GB project)

<p>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:</p>

<ol>
<li>Add 10 to each value</li>
<li>Multiply result by 10¹⁰ to get values with units of m²/m³ (called sv)</li>
<li>Take the log (called SV)</li>
</ol>

<p>These are energy backscattering values.</p>

<p>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.</p>

<p>See related objects:<br />
cp_depths:&nbsp;<a href=\"https://www.bco-dmo.org/dataset/2393\">https://www.bco-dmo.org/dataset/2393</a><br />
cp_lat_lon:&nbsp;<a href=\"https://www.bco-dmo.org/dataset/2394\">https://www.bco-dmo.org/dataset/2394</a></p>