• Water Temperature (Type : SBE3, S/N : 031359)
(a) Calibration date
Pre-calibration : 07 May, 1998 at SBE
T-sensor
Post-calibration: 06 Jan.,1999 at SBE
T-sensor
(b) Drift
0.00499 degrees-C/year
(c) Estimated error
As presented above, the drift rate for temperature is calculated from pre and post calibrations as 0.00499 degrees-C/year. Hypothesizing the linearity in T-sensor drift, the error of water temperature is tried to estimate using the drift rate.
From pre-calibration date, 07 May, 1998 until the last day of MR98-K01 on 15 Dec.,1998, it takes about 0.61 year. Then the error of water temperature data observed by CTD is estimated as 0.0030 degrees-C for the cruise of MR98-K01.
• Water Temperature (Type : SBE3, S/N : 031525)
(a) Calibration date
Pre-calibration : 20 Aug.,1998 at SBE
T-sensor
Post-calibration: 29 Apr.,1999 at JAMSTEC
T-sensor
(b) Drift
-0.00216 degrees-C/year
(c) Estimated error
As presented above, the drift rate for temperature is calculated from pre and post calibrations as -0.00216 degrees-C/year. Hypothesizing the linearity in T-sensor drift, the error of water temperature is tried to estimate using the drift rate.
From pre-calibration date, 20 Aug.,1998 until the last day of MR98-K01 on 15 Dec.,1998, it takes about 0.32 year. Then the error of water temperature data observed by CTD is estimated as -0.0007 degrees-C for the cruise of MR98-K01.
• Salinity (Type : SBE4, S/N : 041202)
(a) Calibration date
Pre-calibration : 12 May, 1998 at SBE
C-sensor
Post-calibration: 07 Jan.,1999 at SBE
C-sensor
(b) Drift
-0.00080 PSU/month
• Salinity (Type : SBE4, S/N : 041205)
(a) Calibration date
Pre-calibration : 20 Aug.,1998 at SBE
C-sensor
Post-calibration: 07 Jul.,1999 at SBE
C-sensor
(b) Drift
-0.00170 PSU/month
• Pressure (Type : SBE9plus, S/N : 42410)
(a) Calibration date
Pre-calibration : 17 May, 1994 at PAROSCIENTIFIC
P-sensor
Post-calibration: 07 Jul.,1999 at SBE
P-sensor
(b) Drift
-0.01 dbar/year
(c) Estimated error
As presented above, the drift rate for pressure is calculated from pre and post calibrations as -0.01 dbar/year. Hypothesizing the linearity in P-sensor drift, the error of pressure is tried to estimate using the drift rate.
From pre-calibration date, 17 May, 1994 until the last day of MR98-K01 on 15 Dec.,1998, it takes about 4.58 year. Then the error of pressure data observed by CTD is estimated as -0.1 dbar for the cruise of MR98-K01.
• Pressure (Type : SBE9plus, S/N : 42423)
(a) Calibration date
Pre-calibration : 17 May, 1994 at PAROSCIENTIFIC
P-sensor
Post-calibration: 17 Apr.,2000 at JAMSTEC
P-sensor
(b) Drift
0.09 dbar/year
(c) Estimated error
As presented above, the drift rate for pressure is calculated from pre and post calibrations as 0.09 dbar/year. Hypothesizing the linearity in P-sensor drift, the error of pressure is tried to estimate using the drift rate.
From pre-calibration date, 17 May, 1994 until the last day of MR98-K01 on 15 Dec.,1998, it takes about 4.58 year. Then the error of pressure data observed by CTD is estimated as 0.4 dbar for the cruise of MR98-K01.
• Dissolved Oxygen (Type : SBE13, S/N : 130338)
(a) Calibration date
Pre-calibration : 17 Jul.,1998 at SBE
D.O.-sensor
Post-calibration was not carried out by loss of the sensor.
