APPENDIX E 

 Computer Program for Wave Eefractlon (Linear-Interpolation) 



Using the IBM 70 9^ 

 PROGRAM TITLE : MAIN 709U. 

 Simimary of Program ; 



This program is essentially the same as that of MAIN 162O; both programs 

 give identical results if processing the same input data. The chief differ- 

 ences "between the programs are as follows : 



(1) MAIN 709U is written in FORTRAN IV^ while MAIN 162O is written in 

 FORTRAN II. 



(2) NOTT (the maximum number of batches to be run) is specified for MAIN 

 709^1. 



(3) Sense Switches are not used in MAIN 709^+. 



(h) ROUND subroutine is not used in MAIN 709^+ since the 709^1 computer auto- 

 matically rounds off output data. 



(5) Due to the large storage capacity of the 709^^ dimensions for C!MAT in 

 MAIN 709I+ may greatly exceed those in MAIN I62O. 



(6) Since the 709^ computer outputs to a printer^ MAIN 709^ has been pro- 

 grammed to print title information at the top of each output page. 



(7) MAIN 709^1 operates approximately 200 times faster than MAIN 162O. 

 Remarks : 



MAIN 1620 is best suited for experimental work connected with further pro- 

 gram refinements and development^ while MAIN 709^ is best suited for pro- 

 cessing large numbers of rays. 



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