Information on CTD raw data observed by R/V MIRAI (Cruise number : MR99-K04) 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 MR99-K04 cruise are presented in section 3. The following software, developed and supplied by the Sea-Bird Electronics, Inc., was used in MR99-K04. SEASAVE(ver 4.236) for data acquisition SEASOFT(ver 4.207) for data processing Data presented on this website is averaged over 1db. 2. CTD sampling system ---------------------- Following is the option for CTD/RMS(Rosette Multi Sampler) system; CTD/RMS and 12 Niskin bottles of 12L 3. Sensors ---------- (1) Temperature sensor Model : SBE3-04F, Sea-Bird Electronics,Inc. Serial number : 031524 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 : 041203 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 : 130338 Measurement range : 0-15ml/l Accuracy : 0.1ml/l Resolution : 0.01ml/l 4. Notes -------- (1) Data processing sequence for SEASOFT as follows; command procedure list -------------------------------------------------------------------- command function -------- ---------------------------------------------------------- datcnv Convert raw data to engineering units, and store converted data in file. section Extract rows of data from file. binavg Average data, basing bins on pressure, depth, scan number, or time range. split Split data in file into upcast and downcast files. --------------------------------------------------------------------