Forward-difference

For the forward-difference scheme

1. start with n being the lowest number bin of the range over which the structure function is to be evaluated (number of bins in range must exceed n_max
   1. start with <math>\delta</math> = 1
   2. compute the second order structure function D(n,<math>\delta</math>) as the segment mean of the square of the velocity difference between the bin n and bin n + <math>\delta</math>:
      
      D(n, <math>\delta</math>) = <math>\langle</math> [v’(n, t) - v’(n+<math>\delta</math>, t)]² <math>\rangle</math>
      
      where the angled brackets indicate the mean across all t for the data segment yielding a velocity difference after the application of the Level 1 QC criteria
   3. increment <math>\delta</math> and repeat steps until <math>\delta</math> = n_max or n + <math>\delta</math> exceeds the last bin of the range over which the structure function is to be evaluated
2. increment n and repeat steps until n + 1 is the last bin of the range over which the structure function is to be evaluated