RSIC CODE PACKAGE PSR-110

1. NAME AND TITLE 
DOQDP: Discrete Ordinates Quadrature Generator. 

2. CONTRIBUTOR 
Oak Ridge National Laboratory, Oak Ridge, Tennessee. 

3. CODING LANGUAGE AND COMPUTER 
Fortran IV; IBM 360/370. 

4. NATURE OF PROBLEM SOLVED 
DOQDP generates direction sets (quadratures used as input to ANISN, DOT, and other 
related codes). If a fully symmetric quadrature is desired, DOQDP can generate the 
direction cosines to be used. If other than a fully symmetric quadrature is to be 
generated, the user must supply the appropriate direction cosines. Once the direction 
cosines are specified, DOQDP will generate the quadrature weights. 

5. METHOD OF SOLUTION 
To determine point weights, DOQDP solves a set of simultaneous liner equations by 
Gaussian elimination with error improvement iterations. 

6. RESTRICTIONS OR LIMITATIONS 
None noted. 

7. TYPICAL RUNNING TIME 
An S16 fully symmetric quadrature generation requires about one second on the IBM 360/91
computer. 

8. COMPUTER HARDWARE REQUIREMENTS 
DOQDP is operable on the IBM 360/370 computers. 

9. COMPUTER SOFTWARE REQUIREMENTS 
A Fortran IV compiler is required. 

10. REFERENCE 
J. P. Jenal, P. J. Erickson, W. A. Rhoades, D. B. Simpson, and M. L. Williams, "The 
Generation of a Computer Library for Discrete Ordinates Quadrature Sets," ORNL/TM-6023 
(September 1977). 

11. CONTENTS OF CODE PACKAGE 
Included are the referenced document and one (1.2MB) DOS diskette which contains the 
source code and sample problem input and output. 

12. DATE OF ABSTRACT 
September 1977; revised and updated March 1984. 

KEYWORDS: ANISN FORMAT; ANISN/DOT INPUT or DATA GENERATOR