1. NAME AND TITLE

METD: Computer Code Systems for Use with Meteorological Data.

2. CONTRIBUTOR

U. S. Nuclear Regulatory Commission, Washington, D.C.

3. CODING LANGUAGE AND COMPUTER

Fortran IV, IBM 3033; Fortran 77, Data General MV/8000.

4. NATURE OF PROBLEM SOLVED

The staff of the Nuclear Regulatory Commission uses the computer codes in this collection to examine, assess, and utilize the hourly values of meteorological data which are received on magnetic tapes in a specified format.

5. METHOD OF SOLUTION

The function of each of the programs in the METD collection is described here. The DATE program checks for correct sequential ordering of the data by year, Julian day and hour. Program JFREQ is used to calculate a joint frequency distribution of wind speed, wind direction and atmospheric stability that can be used in the NRC meteorological computer programs CCC-316/XOQDOQ and CCC-445/PAVAN for routine and accidental release meteorological analyses, respectively. The MISS program calculates missing data statistics. PRECP calculates precipitation statistics. PRINT creates a listing of the data. Program QA checks data set for invalid data values. STABQ calculates atmospheric stability statistics. Program TDP calculates temperature and dew point statistics.

6. RESTRICTIONS OR LIMITATIONS

On the DG MV/8000, the program QA should be compiled with the SAVEVARS switch.

7. TYPICAL RUNNING TIME

Each of the sample problems compiled and executed on the IBM 3033 computer in less than 5 CPU seconds, 1000 I/O's and 100 K in the execute step.

8. COMPUTER HARDWARE REQUIREMENTS

These programs were developed on an IBM 370 computer and were tested by RSIC on an IBM 3033 computer. They were also revised to run on a Data General MV/8000 using the Fortran 77 compiler.

9. COMPUTER SOFTWARE REQUIREMENTS

RSIC executed the programs using a Fortran H extended enhanced compiler and an OS/VS assembler for the IBM 3033 version. For the DG MV/8000, the Fortran 77 compiler was used.

10. REFERENCE

W. Snell, "Nuclear Regulatory Commission Staff Computer Programs for Use with Meteorological Data," NUREG-0917 (July 1982).

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

October 1983; August 1984, updated April 1985.