S/V MALAITA - CTD DATA G. Fisher (NIWAR, New Zealand) ------------------------------------------------------------------------------- Announced availability: 15 January 1994 Last modified: 6 November 1995 Background The S/V Malaita operated in the COARE IFA in February 1993 to conduct flux measurements designed by scientists from New Zealand and the US. Seventeen CTD casts were made between 14 and 24 February 1993 with a SEACAT Profiler SBE19 (Sea-Bird Electronics). Data were collected at irregular intervals one to three times a day down to 250 m. Parameters available include temperature (deg C), conductivity (S/m), pressure (dbar), depth (m), descent rate (m/s) and salinity (kg/m3). Data File Information Directory name: Malaita_CTD Number of data files: 1 (malaita_ctd.tar (includes 33 individual files)) Number of documentation files: 1 (malaita_ctd.readme) Dataset format: ASCII Dataset volume: 820 KB There are 16 '.hex' files (1 file has been lost after conversion) named sddmmaxx.hex (where dd = day, mm = month and xx = 2 digit number) containing raw data and 17 '.cnv' files named sddmmaxx.cnv containing the converted raw to ASCII data. These converted files contain position, time, sample rate, filter parameters and columns of temperature (deg C), conductivity (S/m), pressure (dbar), depth (m), descent rate (m/s) and salinity (kg/m3) data. File Header * Sea-Bird SBE 19 Data File: * FileName = run1.HEX * Software Version 4.018 * Temperature SN = 1177 * Conductivity SN = 1177 * System UpLoad Time = Feb 14 1993 08:26:52 * ds * SEACAT PROFILER V3.0c 1177 02/14/93 18:28:30.550 * strain gauge pressure sensor: S/N = 156843, range = 1000 psia, tc = 61 * clk = 32768.297 iop = 150 vmain = 8.0 vlith = 5.8 * mode = PROFILE ncasts = 1 * sample rate = 1 scan every 0.5 seconds * samples = 2563 free = 18646 lwait = 0 msec * SW1 = 00 battery cutoff = 5.8 volts * number of voltages sampled = 0 * logdata = NO * S> onds stop = switch off # nvalues = 141 # units = metric # name 0 = scan: scan number # name 1 = t0: temperature, deg C # name 2 = c0: conductivity, S/m # name 3 = pr: pressure, decibars # name 4 = depS: depth, salt water, meters # name 5 = dz/dt: descent rate, meters per second # name 6 = sal00: salinity, PSS-78 [PSU] # name 7 = sigma-\15100: density, sigma-theta, kg/m^3 # name 8 = flag: 0.00e+000 # span 0 = 112, 856 # span 1 = 22.0800, 28.5678 # span 2 = 5.086565, 5.604707 # span 3 = 1.005, 141.828 # span 4 = 1.000, 141.000 # span 5 = 0.140, 0.793 # span 6 = 34.4365, 35.6784 # span 7 = 21.7869, 24.6693 # span 8 = 0.00e+000, 0.00e+000 # interval = meters: 1 # start_time = Feb 14 17:09:56 # bad_flag = -9.99e-029 # datcnv_date = May 31 1993 15:52:55, 4.018 # datcnv_in = S1402A01.HEX SEASOFT.CON 1177 1177 156843 # datcnv_skipover = 0 # filter_date = May 31 1993 15:53:13, 4.018 # filter_in = S1402A01.CNV # filter_low_pass_tc_A = 0.500 # filter_low_pass_tc_B = 0.100 # filter_low_pass_A_vars = c0 # filter_low_pass_B_vars = # alignctd_date = May 31 1993 15:53:45, 4.018 # alignctd_in = S1402A01.CNV # alignctd_cond_adv_secs = 0.000 # alignctd_temp_adv_secs = 0.200 # alignctd_oxygen_adv_secs = 0.000 # alignctd_uservar_index_adv_secs= -1 0.000 # loopedit_date = May 31 1993 15:54:04, 4.018 # loopedit_in = S1402A01.CNV # loopedit_minVelocity = 0.250 # loopedit_excl_bad_scans = yes # binavg_date = May 31 1993 15:54:29, 4.018 # binavg_in = S1402A01.CNV # binavg_bintype = Depth Bins # binavg_binsize = 1.00 # binavg_excl_bad_scans = yes # binavg_downcast_only = yes # binavg_skipover = 0 # binavg_surface_bin = no, min = 0.000, max = 0.000, value = 0.000 # derive_date = May 31 1993 15:54:41, 4.018 # derive_in = S1402A01.CNV # file_type = ascii *END* 112 28.5678 5.601067 1.005 1.000 0.140 34.4365 21.7869 0.00e+000 115 28.5633 5.601480 2.011 2.000 0.492 34.4423 21.7928 0.00e+000 Data Processing The ASCII files were produced using the manufacturer-supplied software SEASOFT which does a moderate amount of data correction and filtering. Some internal calibration but no rigorous testing of the data has been done. It is therefore recommended that researchers use the raw data and apply their own conversion parameters. ------------------------------------------------------------------------------- For more information, please contact: Gavin Fisher National Institute of Water & Atmospheric Research P.O. Box 31311 Lower Hutt New Zealand email: fisher@award1.kelburn.cri.nz OR Phone: (64) 4 570 1333 FAX: (64) 4 566 6166 or Peter Isaac National Institute of Water & Atmospheric Research P.O. Box 31311 Lower Hutt New Zealand email: isaac@award1.kelburn.cri.nz FAX: (64) 4 566 6166 ------------------------------------------------------------------------------- www/data/ocean_mixing/malaita_ctd.html