OFFI pal9192 09dec91-27feb92 Optical data collected with an Optical Free Fall Instrument (OFFI) ZBIN (m)=depth in1 meter bins ed410(w/m2/nm)=downwelling spectral irradiance at 410nm ed441(w/m2/nm)=downwelling spectral irradiance at 441nm ed488(w/m2/nm)=downwelling spectral irradiance at 488nm ed520(w/m2/nm)=downwelling spectral irradiance at 520nm ed565(w/m2/nm)=downwelling spectral irradiance at 565nm ed765(w/m2/nm)=downwelling spectral irradiance at 765nm lu410(w/m2/nm/str)=upwelling radiance at 410nm lu441(w/m2/nm/str)=upwelling radiance at 441nm lu488(w/m2/nm/str)=upwelling radiance at 488nm lu520(w/m2/nm/str)=upwelling radiance at 520nm lu565(w/m2/nm/str)=upwelling radiance at 565nm lu765(w/m2/nm/str)=upwelling radiance at 765nm e+410(w/m2/nm)=deck downwelling irradiance at 410nm e+441(w/m2/nm)=deck downwelling irradiance at 441nm e+488(w/m2/nm)=deck downwelling irradiance at 488nm e+560(w/m2/nm)=deck downwelling irradiance at 560nm temperature(deg C) tilt(deg)= tilt of in-water unit roll(deg)= roll of in-water unit Nominally one cast per station conducted roughly on weekly intervals throughout the season. Several measurements per one meter of depth. Instrument deployment designed to profile the water column away from potential perturbation effects of the ship. These data are binned into 1 m bins using downcast data only. The instrument is deployed at a distance from the zodiac 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. Sampled nearshore palmer grid (Stations B-J). Ancillary sky observations, ice conditions 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/9192pal/optics/gsfc/* Raymond C. Smith Karen S. Baker Tim A. Newberger 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 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). The depth offsets between the Lu and Ed sensor was not corrected for in this version of data. The tilt and roll of the instrument indicates the instrument was spiraling with depth. 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. The 765 nm channels, particularly Lu(765), are often null with depth because of such a small signal. Will submit new version where depths have been corrected for each sensor. 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)."