beam

 PI:             James Murray and Wilford Gardner
 dataset:        CTD profile data averaged at two decibar intervals (Murray)
                   with beam attenuation data (Gardner)
 project/cruise: EQPAC/TT008
 ship:           Thomas Thompson

 Optics Protocols - Gardner


 Parameter    Description                             Units

 sta          station number from event log
 cast         CTD cast number from event log
 event        unique number assigned to each sampling 
                operation consisting of month MM, 
		day DD, hour HH and minute mm
 year         year (YYYY)
 mon          month of year (MM)
 day          day of month (DD)
 time         time (HHmm)
 lat          latitude of cast, negative = south      decimal degrees
 lon          longitude of cast, negative = west      decimal degrees      
 depth        depth of sample                         meters
 press        depth of sample reported as pressure    decibars
 temp         temperature, IPTS-68                    degrees C 
 cond         conductivity, CTD                       millimhos
 sal          salinity, PSS-78                        dimensionless
 potemp       potental temperture, IPTS-68            degrees C
 sig_th       sigma theta (potental density)          kilogram/meter^3
 sig_t        sigma-t                                 kilogram/meter^3
 fluor        fluorescence                            milligram/meter^3
 beam_cp      beam attenuation coefficient due        meters^-1
                to particles
 par          photosynthetically available radiation  uE/m^2/sec