DSP: 



TCS: 



TSP: 

 Correlation: 

 Correlation Coefficient: 



Cross Plotting: 



Curve Fitting: 



Cyclical Variations: 



If the depth trace is below the zero foot line, the DCS is 



minus. 



When the BTgm is photographed, this correction is applied, 



thus giving a correct BTgm. 



Depth correction of the BTgm or photographic print. In 

 case the error was not fully corrected in the making of the 

 BTgm, there is a correction factor to be applied to the final 

 print. The DSP is recorded in such a manner that the set 

 correction to be applied is obtained by adding the DSP to 

 the DCS. When no correction is necessary, the DSP will be 

 equal in magnitude but opposite in sign to the DCS. 



Average difference between the surface temperature as read 

 from bucket or intake thermometer and the surface tempera- 

 ture as read from the slides. If the surface temperature 

 is greater than the temperature of the slide, the TCS is 

 plus. If it is less, the TCS is minus. 



Temperature correction of the BTgm applied in the same 

 way as described under DSP. 



The degree of relationship which may exist between two 

 variables. 



The correlation coefficient of the two sets of variates ex- 

 pressed in their respective standard deviations as units, is 

 the arithmetic mean of the products of deviation of corre- 

 sponding values from their respective means. 



Process of replotting a set of data by interchanging the var- 

 iables with the parameter. For instance, temperature versus 

 time with depth as the parameter can be replotted as depth 

 versus time with temperature as the parameter. 



Process of relating two or more BTgms together by com- 

 paring how close the curves will match in characteristic 

 shape. This process may be visual and qualitative, or may 

 be precise and mathematical. The mathematical solutions 

 also include the process of fitting a smooth curve through 

 a set of discreet points. In the case of BTgms, the discreet 

 points are replaced by a whole curve. 



See Variations, Cyclical. 



DCS: 



Dependent Error: 

 Depth Displacement: 

 Depth Set: 

 Determinate Error: 

 Deviation : 



See Correction Factor. 



See Error, Dependent. 



See Displacement, Depth. 



See Set. 



See Error, Determinate. 



Arithmetic difference between the average value of any one 

 single value which contributed to the average value. 



39 



