PRR jan98b 31jan98-13feb98 Optical data collected with the Profiling Reflectance Radiometer (PRR) designed to profile the water column away from potential perturbation effects of the ship. PRR casts were made on the R/V Gould. These data are binned into 1 m bins using downcast data only. #ZBIN (m) #ed412(w/m2/nm)=downwelling spectral irradiance at 412nm #ed443(w/m2/nm)=downwelling spectral irradiance at 443nm #ed490(w/m2/nm)=downwelling spectral irradiance at 490nm #ed510(w/m2/nm)=downwelling spectral irradiance at 510nm #ed555(w/m2/nm)=downwelling spectral irradiance at 555nm #ed665(w/m2/nm)=downwelling spectral irradiance at 656nm #edPAR(E/m2/s)=downwelling PAR #lu412(w/m2/nm/str)=upwelling radiance at 412nm #lu443(w/m2/nm/str)=upwelling radiance at 443nm #lu490(w/m2/nm/str)=upwelling radiance at 490nm #lu510(w/m2/nm/str)=upwelling radiance at 510nm #lu555(w/m2/nm/str)=upwelling radiance at 555nm #lu665(w/m2/nm/str)=upwelling radiance at 656nm #luNF(nE/m2/str/s)=upwelling natural fluorescence #e+412(w/m2/nm)=deck downwelling irradiance at 412nm #e+443(w/m2/nm)=deck downwelling irradiance at 441nm #e+490(w/m2/nm)=deck downwelling irradiance at 490nm #e+510(w/m2/nm)=deck downwelling irradiance at 510nm #e+555(w/m2/nm)=deck downwelling irradiance at 555nm #e+665(w/m2/nm)=deck downwelling irradiance at 656nm #e+PAR(E/m2/s)=deck downwelling irradiance for PAR #temperature(deg C)= temperature in water #ed_tilt(deg)= tilt for in-water unit #ed_roll(deg)= roll for in-water unit #es_tilt(deg)= tilt for deck unit #es_roll(deg)= roll for deck unit Nominally one PRR cast per station. Several measurements per one meter of depth. The instrument is deployed at a distance from the ship into the direction of the sun (when visible) such that ship shadow effects are voided. The instrument free falls throughout the water column and is pulled up manually. Sample the larger LTER grid locations and nearshore stations (B,E,H,J). Ancillary sky observations, solar disc visible (DV) or solar disc obscured (DO), ice conditions, wind speed, wind direction, air temperature, and exact coordinates are presented in the header information for each file. southern ocean, antaractic, palmer station, bio-optics, ocean optics, Binary raw data files. Ascii calibrated and binned data files. First part of the header presents that online lter optical disk ~lter/lterdata/98bjan/optics/gsfc/* Raymond C. Smith Karen S. Baker Janice L. Jones David W. Menzies-calibration Automated data collection to ibm/pc(386). Heidi M. Dierssen, Karen S. Baker, David W. Menzies Heidi M. Dierssen July 23, 1998 Dierssen, H.M. and Smith, R.C. 1996. Estimation of irradiance just below the air-water interface. Ocean Optics XIII. Halifax, Nova Scotia, Canada. SPIE 2963. p. 204-209. Waters, K.J., R.C. Smith, and M.R. Lewis. 1990. Avoiding ship-induced light-field perturbation in the determination of ocenic optical properties. Oceanography. November. p. 18-21. Smith, R.C. and K.S.Baker: The analysis of ocean optical data. Proceedings of the SPIE, Ocean Optics VII, 489: 119-126 (1984). Smith, R.C. and K.S.Baker: The analysis of ocean optical data II. Proceedings of the SPIE, Ocean Optics VIII, 637: 95-107 (1986). Because of surface waves and the often large tilt and roll of the instrument near the surface, the surface optics may not be accurate. Extrapolations of optics to the surface from 0-5 m, 5-10 m, 10-15 m may reveal widely different results. Even though this is same instrument from previous year (9628), calibration coefficients changed significantly. This is believed to be because a different teflon diffuser was put on #9628. For this cruise, the cable was changed and the PRR needed to be put in cage in order free fall properly. Core measurments available after two years. Citation acknowledgement: "Data from the Palmer LTER data archive were supported by Office of Polar Programs, NSF (OPP-9011927)."

Datafile Form V1.3 for describing a data file.