of the covariance surface is accomplished by means of three programs yield- 

 ing three 21 x 41 matrices. The sum of these three matrices equals 

 Q(p. q.)(90 - |qj )(60 - p), and a division will obtain the required values for the 

 covariance surface. Since the problem is quite long, procedures have been 

 established in case of machine trouble. The program can be restarted by 

 typing on supervisory control the initial desired two-dimensional lag. The 

 computer will pick it up from that point. A flow chart for this program is 

 given in figure 9.1. 



The spectrum program did not present such difficulties because the en- 

 tire data could be easily w^ritten in the naemory. 



These programs were compiled by meajis of Generalized Programming, 

 a particular system of automatic programming developed by the Univac Divi- 

 sion of the Sperry Rand Corp. These programs for a general array can be 

 found in the G. P. Library under the call letters AUC2, and COSM. They 

 are available at the Univac Division of Sperry Rand, Inc. , 19th and Allegheny 

 Avenue, Philadelphia, Pennsylvania. 



To complete the program, an input-output routine must be added. This 

 program has been written. It exists on tape at the College of Engineering, 

 New York University. Further checking is deemed desirable before a pro- 

 duction run is attempted. 



The complete Univac procedure for determining the spectrum from 



leveled data has thus been set up. After further checking, it could be used 



given a'^out twenty hours of Univac time for each set of data. 

 . 89 



