SUMMARY 



In this study, the primary temperature standard is the hydrocast temperature 

 measurements and the secondary standard is the STD/SV temperature measurements. 

 During ORB-3 and 0RB4 experiments, no hydrocast measurements were made. The 

 STD/SV measurements are used to determine the XBT system errors for the XBT systems 

 used during these experiments. Table 17 tabulates the errors for the various measurement 

 systems used to measure seawater temperature. These errors are added algebraically 

 to the measured values to bring them into agreement with the hydrocast and STD/SV 

 measurements. 





System 



Errors, °C 



GULF OF ALASKA 



STD/SV 



0.00 





SVTP 



-0.03 





XBT 



-0.17 





Towed Thermistor 1 



0.08 





Towed Thermistor 2 



-0.11 



SUDS I 



STD/SV 



0.02 





XBT: LEE 



-0.05 





DE STEIGUER 



0.23 





CAPE 



0.05 





Thermistor Chain 



-0.01 



ORB-3 



XBT: System A 



0.11 





System B 



0.09 



ORB-4 



XBT 



0.02 



CAPER 



CTD/SV 



0.02 





XBT: DE STEIGUER 



0.03 





MOANA WAVE 



0.12 





FLIP 



- 





Bucket Thermometer: 







DE STEIGUER 



-0.04 





MOANA WAVE 



-0.04 



RAPLOC/DEEPTOW 



CTD/SV 



• -0.01 





XBT: System A 



-0.11 





System B 



-0.16 





System C 



-0.19 





Bucket Thermometer 



-0.07 



Table 17. System measurement errors. 



The system errors for the STD/SV. CTD/SV, SVTP, and thermistor chain systems 

 were all small - varying from -0.03°C to 0.02°C. The errors for the towed thermistor 

 and the bucket thermometers were slightly larger — varying from -0.1 1°C to 0.08°C. The 

 system error for the towed thermistor changed from 0.08° C to -0.1 1°C between the 

 measurements made during the A2 experiments and those made during environmental 

 survey 2. This may have resulted from a recalibration of the system between the two sets 

 of measurements. Some of the XBT system errors were substantial, varying from -0.1 9°C 



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