!-------------------------------------- LICENCE BEGIN ------------------------------------
!Environment Canada - Atmospheric Science and Technology License/Disclaimer,
!                     version 3; Last Modified: May 7, 2008.
!This is free but copyrighted software; you can use/redistribute/modify it under the terms
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!

      SUBROUTINE oda_maskro 1,1
      use modmask, only : lmaskro, lmask
#if defined (DOC)
*
*Purpose : Defines a mask of assimilated data
*
*Author  : S. Pellerin, ARMA, January 2009
*          Based on selection made in observation operator as written by
*          J. M. Aparicio in Jan 2004
*          C.Charette - ARMA et N.Wagneur - CMDA - Juillet 2011
*               - Ajout de la capacite de lire le champ d'essai de GEM Version 4 
*                 ayant une grille verticale decalee dite "STAGGERED"
*
#endif
CC      use modgps04profile
CC      use modgps06gravity
CC      use modgps08refop
      IMPLICIT NONE
*implicits
#include "pardim.cdk"
#include "comdimo.cdk"
#include "comoabdy.cdk"
#include "comoahdr.cdk"
#include "comoba.cdk"
#include "cvcord.cdk"
*
CC      REAL*8 PJO
CC      REAL*8 PJO0, PJO1
C
      REAL*8 ZTODEG
CC      REAL*8 ZLAT, Lat
CC      REAL*8 ZLON, Lon
CC      REAL*8 ZETA(JPNFLEV)
CC      REAL*8 BTT(JPNFLEV)
CC      REAL*8 BHU(JPNFLEV)
CC      REAL*8 BGZ(JPNFLEV)
CC      REAL*8 BP0
CC      REAL*8 BPT, BPR, BCF
CC      REAL*8 BMT
CC      REAL*8 DH
CC      REAL*8 DNUM,SUM1,SUM2,AVG1,AVG2,BIAS,STD,RMS
CC      REAL*8 HNH1
C
CC      REAL*8 ZOBS, ZMHX, ZOER, ZINC, ZOBI, ZMHXL
CC      REAL*8 JAC(ngpscvmx)
CC      REAL*8 DX (ngpscvmx)
C
      INTEGER JF
      INTEGER IBEGIN  , ILAST
      INTEGER IBEGINOB, ILASTOB, JO
      INTEGER IDATYP
      INTEGER IDATA   , IDATEND, JDATA
      INTEGER JL, JV, JH, NQCVAR, NGPSLEV
C
      LOGICAL  ASSIM, LUSE

      INTEGER NH, NH1, index
CC      TYPE(GPSPROFILE)           :: PRF
CC      REAL(DP)     , ALLOCATABLE :: H   (:)
CC      TYPE(GPSDIFF), ALLOCATABLE :: RSTV(:)
C
      DO JF = 1, NFILES
C
C     *  Look only files of type Radio Occultation (RO)
C
        IF ( CFAMTYP(JF).EQ.'RO' .AND. NBEGINTYP(JF).GT.0 ) THEN
          IBEGIN   = NBEGINTYP(JF)
          ILAST    = NENDTYP  (JF)
          IBEGINOB = MOBDATA(NCMOBS,IBEGIN)
          ILASTOB  = MOBDATA(NCMOBS,ILAST )
C
C     *     Loop over all observations of the file
C
          DO JO = IBEGINOB, ILASTOB
            IDATYP = MOD(MOBHDR(NCMITY,JO),1000)
            IF ( IDATYP .EQ. 169 ) THEN
              IDATA   = MOBHDR(NCMRLN,JO)
              IDATEND = MOBHDR(NCMNLV,JO) + IDATA - 1
              DO JDATA= IDATA, IDATEND
                LUSE=( MOBDATA(NCMASS,JDATA).EQ.1 )
                IF ( LUSE ) THEN
                  lmaskro(jdata) = .true.
                ENDIF
              ENDDO
            ENDIF
          ENDDO
        ENDIF
      ENDDO
      lmask = lmask .or. lmaskro
      RETURN
      END