Table 10-4 

 Data File Format 



Byte 

 numbers 



Typical values 

 (stored LSB to 

 MSB) 



Description 



1 to 4 



100 



If the integer is stored in these four bytes, data are 

 stored in a column-wise orientation (first column, then 

 second column, etc.). If the integer 100 is stored in 

 these four bytes, data are stored in a row-wise 

 orientation (first row, then second row, etc.). 



5 to 8 



100 



The integer stored in these four bytes represents the 

 number of rows in the matrix. 



9 to 12 



8 



The number of columns in the matrix. 



1 3 to 1 6 







Indicates that the matrix is of real numbers. 



17 to 20 



4 



Length of the variable name plus one. 



21 to 23 



tat 



ASCII codes of characters in variable name. Note that 

 there will be one byte for each character in the 

 variable name. 



24 







NUL character. 



25 to (N-1) 



DATA 



Data in the matrix, stored sequentially as eight-byte 

 floating point values. 



Nto (N + 3) 



100 



First four bytes of header for next variable. 



with the best-fit straight line through the pattern subtracted from it. This 

 detrending of the data minimizes effects of bottom slope and errors from the 

 grid not being exactly horizontal. 



Figure 10-14 shows mean concentration over the entire run against distance 

 from the ACP. The furthest point from the ACP in the concentration profile 

 is the concentration just above the bottom, where the bottom location has been 

 determined from the most common instantaneous bottom location during the 

 course of the run, whichever is closest to the ACP. 



Summary of data characteristics 



Table 10-5 shows an example listing of statistical data for run 12, 

 consisting of the maximum, minimum, mean, and standard deviation for the 

 pressure sensor, both OBS, both channels of the EMCM, and both the low- 

 and high-gain channels of the pore pressure sensor. From the ripple 

 measurements, the maximum, minimum, and standard deviation of the 

 detrended data are listed. 



Chapter 10 Intermittent Near-Bed Sediment Suspension 



201 



