The instrument used was a Tethered Spectral Radiometer Buoy (TSRB-II)  (S/N 003) from Satlantic, Inc.   This instrument measures:

• downwelling irradiance just above the sea surface at seven visible wavebands
  (412, 443, 489, 555, 670, 684 and 700 nm)

• upwelling radiance just below the sea surface at the same wavebands, and

• sea surface temperature.

The wavebands have bandpasses of approximately 10 nm.  Measurements are made at a frequency of 6 Hz.  This instrument is calibrated by Satlantic, Inc. 

The TSRB was hand-deployed either from the ship or from a dive boat, and allowed to sit at the sea surface approximately 30 m away from the ship.

Webpage by Jasmine S. Bartlett, Oregon State University.