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ADAS Subroutine metrd

       SUBROUTINE METRD(NUTMAX , NUDMAX , NUZMAX , NUMMAX ,
     &                  MAXT   , MAXD   , DSNIN  ,
     &                  IZL    , IZH    , IZ0    ,
     &                  TEK    , DENSA  ,
     &                  METFRC ,
     &                  NGRD   ,
     &                  IST2   , IST5 )
C
C----------------------------------------------------------------------
C
C ************ FORTRAN 77 SUBROUTINE METRD *****************************
C
C   VERSION 1.0
C
C   PURPOSE:
C           TO FETCH DATA FROM ADF10 'MET' FILES AND SPLINE ONTO
C           THE REQUESTED TEMPERATURE/DENSITY GRID.
C
C           CALLING PROGRAM LH404RU
C
C   SUBROUTINE:
C
C   INPUT : (I*4)  NUTMAX - OUTPUT ELEMENT MASTER FILE
C                                 MAXIMUM NUMBER OF TEMPERATURES
C   INPUT : (I*4)  NUDMAX - OUTPUT ELEMENT MASTER FILE
C                                 MAXIMUM NUMBER OF DENSITIES
C   INPUT : (I*4)  NUZMAX - OUTPUT ELEMENT MASTER FILE
C                                 MAXIMUM NUMBER OF CHARGE STATES
C   INPUT : (I*4)  NUMMAX - OUTPUT ELEMENT MASTER FILE
C                                 MAXIMUM NUMBER OF METASTABLES
C   INPUT : (I*4)  MAXT   - OUTPUT ELEMENT MASTER FILE
C                                 ACTUAL NUMBER OF TEMPERATURES
C   INPUT : (I*4)  MAXD   - OUTPUT ELEMENT MASTER FILE
C                                 ACTUAL NUMBER OF DENSITIES
C   INPUT : (C*80) DSNIN(,) - NAMES OF MASTER CONDENSED FILES
C                             TO BE OPENED
C   INPUT : (I*4)  IZL    - LOWEST ION CHARGE TO READ
C   INPUT : (I*4)  IZH    - HIGHEST ION CHARGE TO READ
C                           ACTUALLY READ ONE MORE IF IZH<IZ0
C   INPUT : (I*4)  IZ0    - NUCLEAR CHARGE TO READ
C   INPUT : (R*8)  DENSA()- OUTPUT ELEMENT MASTER FILE
C                                 SET OF MAXD DENSITIES
C   INPUT : (R*8)  TEK()  - OUTPUT ELEMENT MASTER FILE
C                                 SET OF MAXT TEMPERATURES
C   OUTPUT: (R*8)  METFRC(,,,) - METASTABLE POPULATION FRACTIONS,
C                                 SPLINED ONTO THE OUTPUT TEMPERATURES
C                                 AND DENSITIES
C                                 1ST DIMENSION - DENSITY INDEX
C                                 2ND DIMENSION - TEMPERATURE INDEX
C                                 3RD DIMENSION - CHARGE STATE INDEX
C                                 4TH DIMENSION - METASTABLE INDEX
C   INPUT : (I*4)  NGRD() - NUMBER OF GROUND STATES OF THE FIRST
C                           50 ISOELECTRONIC SEQUENCES
C   INPUT : (I*4)  IST2   - UNIT NUMBER FOR OUTPUT INFORMATION
C                           AND ERROR MESSAGES
C   INPUT : (I*4)  IST5   - UNIT NUMBER FOR READING MASTER CONDENSED
C                           FILE
C
C   PARAMETER : (I*4)  NTDMAX - SIZE OF LOCAL WORKING SPACE
C                                 (MUST BE GREATER THAN NUTMAX & NUDMAX)
C   PARAMETER : (I*4)  NDZ1V  - MASTER CONDENSED FILE
C                                 MAXIMUM NUMBER OF CHARGE STATES
C   PARAMETER : (I*4)  NDTIN  - MASTER CONDENSED FILE
C                                 MAXIMUM NUMBER OF TEMPERATURES
C   PARAMETER : (I*4)  NDDEN  - MASTER CONDENSED FILE
C                                 MAXIMUM NUMBER OF DENSITIES
C   PARAMETER : (I*4)  NDMET  - MASTER CONDENSED FILE
C                                 MAXIMUM NUMBER OF METASTABLES
C
C         : (R*8)  DENSR()    - INPUT MASTER CONDENSED FILE
C                                 SET OF IDE REDUCED DENSITIES
C         : (R*8)  TR()       - INPUT MASTER CONDENSED FILE
C                                 SET OF ITE REDUCED TEMPERATURES
C         : (R*8)  ZIPT()     - INPUT MASTER CONDENSED FILE
C                                 SET OF IZE RECOMBINING ION CHARGES
C         : (R*8)  AIPTM(,,)  - INPUT MASTER CONDENSED FILE
C                                 RATIO OF METASTABLE TO GROUND POP.
C                                 1ST DIMENSION - DENSITY INDEX
C                                 2ND DIMENSION - TEMPERATURE INDEX
C                                 3RD DIMENSION - CHARGE STATE INDEX
C                                 4TH DIMENSION - METASTABLE INDEX
C         : (R*8)  EIA()      - INPUT MASTER CONDENSED FILE
C                                 SET OF IONISATION POTENTIALS (CM-1)
C
C         : (R*8)  ATTY(,)    - WORK SPACE FOR INTERPOLATION
C                             - STORES LOG10(INTERPOLATED VALUES)
C                                 1ST DIMENSION - TEMPERATURE
C                                 2ND DIMENSION - DENSITY
C         : (R*8)  ARRAY(,)   - STORES LOG10(INTERPOLATED VALUES)
C                                 1ST DIMENSION - TEMPERATURE
C                                 2ND DIMENSION - DENSITY
C
C     ROUTINES:
C     ---------
C         XXOPEN   -
C         XXTERM   -
C         XXIN80   -  FETCH DATA FROM MASTER CONDENSED FILE
C         D4SPLN   -  INTERPOLATE CONDENSED MASTER FILE
C                     UPDATED VERSION OF D1SPLN
C
C---------------------------------------------
C AUTHOR:  LORNE D. HORTON
C          ROOM K1/1/58, JET JOINT UNDERTAKING
C
C   DATE:  21ST FEBRUARY 1996
C----------------------------------------------------------------------
C UNIX-IDL PORT:
C
C VERSION: 1.1				DATE: 11-11-96
C MODIFIED: WILLIAM OSBORN (TESSELLA SUPPORT SERVICES PLC)
C     - FIRST CONVERTED
C
C VERSION: 1.2				DATE: 20-11-96
C MODIFIED: WILLIAM OSBORN (TESSELLA SUPPORT SERVICES PLC)
C     - REMOVED DIAGNOSTIC WRITE STATEMENTS
C
C VERSION: 1.3				DATE: 20-10-97
C MODIFIED: LORNE HORTON
C     - REMOVED WHITE SPACE FROM DATA FILENAME.
C
C----------------------------------------------------------------------
C
      CHARACTER*80        DSNIN(50,10)
      INTEGER             IST2,        IST5,        IZ0,         IZH
      INTEGER             IZL,         MAXD,        MAXT
      INTEGER             NGRD(50),    NUDMAX,      NUMMAX,      NUTMAX
      INTEGER             NUZMAX
      REAL*8              DENSA(NUDMAX)
      REAL*8              METFRC(NUDMAX,NUTMAX,NUZMAX,NUMMAX)
      REAL*8              TEK(NUTMAX)
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