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.
        --------------------------------------------------------------------