Dataset: 120 kHz acoustic backscatter in relative decibels from RVIB Nathaniel B. Palmer cruises NBP0103 and NBP0103 in the Southern Ocean in 2001 (SOGLOBEC project; Southern Ocean Krill project)

These relative decibel values are the result of processing the NBP0104 and NBP0103 volume backscatter data from BIOMAPER-II 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^-10 to each value
2. Multiply result by 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.

See the related objects sv120coords_0104 and sv120depths_0104 for NBP0104 and sv120amcoords_0103, sv120pmcoords_0103 and sv120depths_0103 for NBP0103.