Information on CTD raw data observed by R/V MIRAI (Cruise number : MR98-K02) 1. Preface ---------- CTD(Conductivity-Temperature-Depth profiler) is used to observe the vertical profiles of temperature and conductivity. Usually, this system is operated with multicylinder water sampler. Observed signal is transmitted from sensor to the operation room on board using wire cable, and electric power is supplied from vessel to sensor. Details of sensors attached to CTD system for MR98-K02 cruise are presented in section 3. The following software, developed and supplied by the Sea-Bird Electronics, Inc., was used in MR98-K02. SEASAVE(ver 4.226) for data acquisition SEASOFT(ver 4.226) for data processing Data presented on this website is averaged over 1m. 2. CTD sampling system ---------------------- Followings are the options for CTD/RMS(Rosette Multi Sampler) systems; system1 : CTD/RMS and 24 Niskin bottles of 30L system2 : CTD/RMS and 12 Niskin bottles of 12L 3. Sensors --------------------- CTD/RMS system1 (1) Temperature sensor Model : SBE3-04F, Sea-Bird Electronics,Inc. Serial number : 031464 Measurement range : -5.0 to +35degC Accuracy : 0.001degC Resolution : 0.0002degC (2) Salinity sensor Model : SBE4-04/O, Sea-Bird Electronics,Inc. Serial number : 041206 Measurement range : 0.0 to 7S/m Accuracy : 0.0003S/m Resolution : 0.00004S/m (3) Pressure sensor Model : SBE9plus, Sea-Bird Electronics,Inc. Serial number : 0358 Measurement range : up to 10500m Accuracy : 0.015%F.S. Resolution : 0.001%F.S. (4) DO sensor Model : SBE13-04, Sea-Bird Electronics,Inc. Serial number : 130338 Measurement range : 0-15ml/l Accuracy : 0.1ml/l Resolution : 0.01ml/l (5) Altimeter Model : Benthos 2110-1, Serial number : 0205 (6) Fluorometer Model : Seapoint Sensors,Inc. Serial number : 2148 (7) Transmissometer Model : WET Labs,Inc. Serial number : CST-207RD CTD/RMS system2 (1) Temperature sensor Model : SBE3-04F, Sea-Bird Electronics,Inc. Serial number : 031525 Measurement range : -5.0 to +35degC Accuracy : 0.001degC Resolution : 0.0002degC (2) Salinity sensor Model : SBE4-04/O, Sea-Bird Electronics,Inc. Serial number : 041205 Measurement range : 0.0 to 7S/m Accuracy : 0.0003S/m Resolution : 0.00004S/m (3) Pressure sensor Model : SBE9plus, Sea-Bird Electronics,Inc. Serial number : 0357 Measurement range : up to 10500m Accuracy : 0.015%F.S. Resolution : 0.001%F.S. (4) DO sensor Model : SBE13-04, Sea-Bird Electronics,Inc. Serial number : 130339 Measurement range : 0-15ml/l Accuracy : 0.1ml/l Resolution : 0.01ml/l (5) Altimeter Model : Benthos 2110-1, Serial number : 0206 (6) Fluorometer Model : SEA TECH,Inc. Serial number : 237 (7) Transmissometer Model : SEA TECH,Inc. Serial number : 551 4. Notes --------- (1) Observation is performed with CTD/RMS system presented section 3. Observed data by each system is stored in the data file, its filename is presented in the following table. applied files list (2) Fluorometer was not attached presented in the following table. So numerics presented in fluorometer column have no meaning. applied files list (3) Transmissometer was not attached presented in the following table. So numerics presented in transmissometer column have no meaning. applied files list (4) Data processing sequence for SEASOFT as follows; Each command has the following function. ------------------------------------------------------------------- command function ------- ---------------------------------------------------------- datcnv Convert raw data to engineering units, and store converted binavg Average data, basing bins on pressure, depth, scan number, or time range. split Split data in file into upcast and downcast files. binavg Average data, basing bins on pressure, depth, scan number, or time range. -------------------------------------------------------------------