Dataset: optics-4
Deployment: AII-119-4

   PI:             Curtiss Davis
   of:             Jet Propusion Laboratory
   dataset:        Bio Optical Profiler Data
   dates:          April 25, 1989 to May 08, 1989 
   location:       N: 47.0112  S: 46.2827  W: -20.1635  E: -19.0353
   project/cruise  North Atlantic Bloom Experiment/Atlantis II 119, leg 4
   ship:           R/V Atlantis II
 
Methodology: Bio-Optical profiling observations
R/V Atlantis II,  25 April - 10 May 1989
November 07, 2002

Data Description: 

Optical data was collected with a Bio-Optical Profiling System (BOPS) an updated version of the BOPS originally developed by Smith et al. (1984). The heart of the BOPS is a Biospherical instruments MER-1048 Spectroradiometer which measures up and downwelling spectral irradiance and upwelling spectral radiance. The MER-1048 also has sensors for Photosynthetically Available Radiation (PAR), depth, tilt and roll. In addition, temperature and conductivity are measured with a Sea-Bird CTD, chlorophyll fluorescence is measured with a Sea Tech fluorometer and bean transmission with a Sea Tech 25-cm transmissometer. The Mer-1048 acquires all the data 16 times a second, averages it to four records a second and sends it up the cable to a deck box and a Compaq-286 computer which stores the data on the hard disk. Additionally, a deck cell measures the downwelling surface irradiance in four spectral channels. Also surface PAR was measured continuously using a Biospherical Instruments QSR-240 Integrating PAR sensor. The profile data was filtered to remove obvious data spikes and then binned into one-meter averages.

Reference: Smith, R.C., C.R. Booth, and J.L. Star, Oceanographic bio-optical profiling system. Applied Optics, 23, 2791-2797, 1984