

Above 



In 



Below 



All 





Thermocline 



Thermocline 



Thermocline 



Differences 



SYSTEM C versus SYSTEM A 











Number of differences 



40 



37 



45 



122 



Average difference, °C 



-0.12 



0.02 



-0.02 



-0.04 



Standard deviation, °C 



0.12 



0.47 



0.18 



0.29 



Percent : 











Greater than +0.34°C 



0.0 



5.4 



2.2 



2.5 



Less tiian -0.34°C 



0.0 



2.7 



0.0 



<0.1 



SYSTEM C versus SYSTEM B 











Number of differences 



40 



36 



40 



116 



Average difference, °C 



-0.06 



-0.05 



-0.03 



-0.05 



Standard deviation, °C 



0.16 



0.29 



0.20 



0.22 



Percent: 











Greater than +0.34°C 



0.0 



13.9 



5.0 



6.0 



Less than -0.34°C 



5.0 



11.1 



5.0 



6.9 



ALL DIFFERENCES 











Number of differences 



80 



73 



85 



238 



Average difference, °C 



-0.09 



-0.02 



-0.02 



-0.04 



Standard deviation, °C 



0.14 



0.39 



0.19 



0.26 



Percent: 











Greater than +0.34°C 



0.0 



9.6 



3.5 



4.2 



Less than -0.34°C 



2.5 



6.8 



2.4 



3.8 



Table 48. Comparison of simultaneous 1830-m and 460-m XBT profiles taken during the 

 RAPLOC/DEEPTOW experiments. 



For all sets of statistics, except the in-thermocline system C versus system A differences, the 

 average difference was slightly negative. For the set of all 238 differences, the average 

 difference was -0.04°C, with 4.2% of the differences greater than +0.34°C and 3.8% less 

 than -0.34°C. The extreme differences were -0.63°C and 2.40°C. Thus, on the average, the 

 1830-m system measured temperatures slightly lower than temperatures measured by the 

 two 460-m systems. 



Table 49 shows the average temperatures for the 15 XBT pairs whose differences 

 met the accuracy specification of ±0.34°C at all comparison depths above and below the 

 thermocline (designated by asterisk in tables 46 and 47). All average differences, even the 

 in-thermocline differences, are well within the accuracy specification. The agreement 

 between the two sets of profiles is excellent. 



120 



