Upper Ocean Temperature, Salinity and Pressure data:

Upper Ocean temperature and salinity data from 1.5 m to 750 m depth 
obtained with TRITON buoys are beginning in 1998.
Temperatures are in units of degrees centigrade(ITS-90).
Salinities are measured by practical salinity scale (PSS-78).
Pressures are in units of dbar.

The standard TRITON has 10 CT and 2 CTD sensors at the depths of
1.5m, 25m, 50m, 75m, 100m, 125m, 150m, 200m, 250m and 500m for CT 
and 300m and 500m for CTD. These sensors' name are CT01, CT02...
CT10, CTD1 and CTD2.
Sometimes, additional CT (CT11-CT13) and/or CTD (CTD3) sensors may 
have been added to TRITON moorings for special purposes.

The download file was compressed in zip format. After uncompress,
ascii format data file and information file will be appeared.
The information file includes Observation No., WMO No., Deployment date, 
Recovery Date, Deployment position, Depth and magnetic correction value. 
In ascii format data files, to the right of the data you will find data quality 
indices which use the definitions below (These indices are basically same as 
TAO/TRITON data provided by PMEL/NOAA).
Using these indices you can tune your analysis to trade-off between quality 
and temporal/spatial coverage.


Data Format:
The field in CT/CTD data file are listed below.
      1: Date
      2: PTT No.
      3: Position (Latitude)
      4: Position (Longitude)
  5- 17: Temperature (CT01-CT13)
 18- 20: Temperature (CTD1-CTD3)
 21- 33: Nominal depth of each sensor (CT01-CT13)
 34- 36: Nominal depth of each sensor (CTD1-CTD3)
 37- 49: Pressure (CT01-CT13) *** Calcurated with CTD pressure
 50- 52: Pressure (CTD1-CTD3)
 53- 65: Salinity (CT01-CT13)
 66- 68: Salinity (CTD1-CTD3)
 69- 81: Sigma (CT01-CT13)
 82- 84: Sigma (CTD1-CTD3)
     85: Position QI
 86-101: Temperature QI
102-117: Salinity QI
118-120: Pressure QI

*** Pressures except at 1.5m and 300m and 750m depths are interpolated
    with pressure data at 1.5m (considering 1.5dbar), 300m and 750m.

The data format is listed below.
Line1 : header1
Line2 : header2
Line3-: Data (a19,a1,i6,a1,a9,a1,a10,16(a1,f7.2),16(a1,f6.1),
              16(a1,f7.1),32(a1,f7.2),36(a1,i1))
 (a1) in the above format corresponds ','.



Quality Index Definitions for CT/CTD data:

0 = datum missing

1 = highest quality; Pre/post-deployment calibrations agree to within
sensor specifications. In most cases only pre-deployment calibrations have
been applied

2 = default quality; Pre-deployment calibrations were applied.  Default value 
for sensors presently deployed at the ocean and for sensors which were either 
not recovered or not calibratable when recovered.

3 = adjusted data; Pre/post calibrations differ, or original data do
not agree with other data sources (e.g., other in situ data or climatology),
or original data are noisy.  Data have been adjusted to correct for error.

4 = lower quality; Pre/post calibrations differ, or data do not agree
with other data sources (e.g., other in situ data or climatology), or data
are noisy.  Data could not be confidently adjusted to correct for error.

5 = sensor or communication device failed


Quality Index Definitions for Position data:

0 = datum missing

2 = default quality

5 = buoy was largely moved from deployment position (Over 6 nautical miles)


If you use the data in publications, please acknowledge the TRITON Project. 
Also, we would appreciate receiving a preprint and/or reprint of those publications 
utilizing the data for inclusion in the TRITON Project bibliography.  
Relevant publications should be sent to:
     The TRITON Office
     Japan Agency for Marine-Earth Science and Technology
     2-15 Natsushima-cho
     Yokosuka, 237-0061 JAPAN

Please send comments, questions, or problems to "triton@jamstec.go.jp".