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!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 SETFGEDIF(CDFAM) 3,8
#if defined (DOC)
*
***s/r SETFGEDIF - Interpolation of THE FIRST GUESS ERROR VARIANCES
* for data derived through the diff self-differencing variables
*
*
*Author : J.M. Aparicio *MSC/ARMA November 2004
*Revision:
*
** Purpose: -Construct the FIRST GUESS ERROR VARIANCES from the
* diff-calculated dependencies and the primary errors.
*
*
#endif
use modgps04profile
use modgps06gravity
use modgps07geostruct
use modgps08refop
IMPLICIT NONE
*implicits
#include "pardim.cdk"
#include "comdim.cdk"
#include "comgem.cdk"
#include "comdimo.cdk"
#include "comoabdy.cdk"
#include "comoahdr.cdk"
#include "comoba.cdk"
#include "commvo.cdk"
#include "commvohr.cdk"
#include "cvcord.cdk"
#include "comcst.cdk"
#include "comphy.cdk"
*
CHARACTER*2 CDFAM
INTEGER JF
INTEGER IBEGIN , ILAST
INTEGER IBEGINOB, ILASTOB, JO
INTEGER IDATYP
INTEGER IDATA , IDATEND, JDATA
INTEGER NH, NH1
INTEGER JL, JV, NGPSLEV
LOGICAL ASSIM
REAL*8 ZTODEG
REAL*8 ZLAT, Lat
REAL*8 ZLON, Lon
REAL*8 ZETA(JPNFLEV)
REAL*8 ZTT (JPNFLEV)
REAL*8 ZHU (JPNFLEV)
REAL*8 ZGZ (JPNFLEV)
REAL*8 ZP0
REAL*8 ZPT
REAL*8 ZMT
REAL*8 ZMHX
REAL*8 HNH1
REAL*8 JAC(ngpscvmx)
REAL*8 DV (ngpscvmx)
TYPE(GPSPROFILE) :: PRF
REAL(DP) , ALLOCATABLE :: H (:)
TYPE(GPSDIFF), ALLOCATABLE :: RSTV(:)
C
C * 1. Initializations
C * ---------------
C
ZTODEG = 180.0 / RPI
C
C * Eta vector:
C
NGPSLEV=NLEVTRL
DO JL = 1, NLEVTRL
ZETA(JL) = VLEVHR(JL)
ENDDO
C
DO JF = 1,NFILES
IF ( (CFAMTYP(JF) .EQ. CDFAM ) .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
C
C * . Process only refractivity data (codtyp 169)
C
IDATYP = MOD(MOBHDR(NCMITY,JO),1000)
IF ( IDATYP .EQ. 169 ) THEN
C
C Loops over data in the observation
C
IDATA = MOBHDR(NCMRLN,JO)
IDATEND = MOBHDR(NCMNLV,JO) + IDATA - 1
ASSIM = .FALSE.
C
C Scan for requested assimilations, and count them
C
NH = 0
DO JDATA= IDATA, IDATEND
IF ( MOBDATA(NCMASS,JDATA).EQ.1 ) THEN
ASSIM = .TRUE.
NH = NH + 1
ENDIF
ENDDO
C
C * If assimilations are requested, apply the observation operator
C
IF (ASSIM) THEN
C
C * Profile at the observation location:
C
Lat = ROBHDR(NCMLAT,JO)
Lon = ROBHDR(NCMLON,JO)
ZLAT = Lat * ZTODEG
ZLON = Lon * ZTODEG
DO JL = 1, NLEVTRL
C
C * Profile x
C
ZTT(JL) = GOMTHR (JL,JO)-273.15
ZHU(JL) = GOMQHR (JL,JO)
ZGZ(JL) = GOMGZHR(JL,JO)
ENDDO
ZP0 = GOMPSHR(1,JO)
ZPT = RPPOBSHR(1,JO)
ZMT = ZGZ(NLEVTRL)/RG
ZMT = gpsgeopotential(Lat, ZMT)/RG
C
C * GPS profile structure:
C
CALL GPSSTRUCT1(NGPSLEV,ZLAT,ZLON,ZETA,
+ ZTT,ZHU,ZP0,ZMT,ZPT,PRF)
C
C * Local error
C
DO JL = 1, NLEVTRL
DV ( JL) = 1.
DV (NLEVTRL+JL) = 1.
ENDDO
DV (2*NLEVTRL+1) = 2.
IF (JO.EQ.IBEGINOB) THEN
DO JL = 1, 2*NFLEV+1
WRITE(*,*)'SETFGEDIF', JL, DV(JL)
ENDDO
ENDIF
C
C * PREPARE THE VECTOR OF ALL THE OBSERVATIONS
C
ALLOCATE( H (NH) )
ALLOCATE( RSTV (NH) )
NH1 = 0
DO JDATA= IDATA, IDATEND
IF ( MOBDATA(NCMASS,JDATA).EQ.1 ) THEN
NH1 = NH1 + 1
HNH1 = ROBDATA8(NCMPPP,JDATA)
H(NH1)= gpsgeopotential(Lat,HNH1)/9.80616
ENDIF
ENDDO
C
C * Apply the observation operator
C
CALL GPSREFOPV(H, PRF, RSTV)
C
C * Perform the H(xb)DV operation
C
NH1 = 0
DO JDATA= IDATA, IDATEND
IF ( MOBDATA(NCMASS,JDATA).EQ.1 ) THEN
NH1 = NH1 + 1
C
C * Observation jacobian
C
JAC = RSTV(NH1)%DVAR
C
C * Evaluate sqrt( H(xb)DV **2 )
C
ZMHX = 0._dp
DO JV = 1, 2*PRF%NGPSLEV+1
ZMHX = ZMHX + (JAC(JV) * DV(JV))**2
ENDDO
ZMHX = SQRT(ZMHX)
C
C * FIRST GUESS ERROR VARIANCE
C
ROBDATA(NCMFGE,JDATA) = ZMHX
IF (JO.EQ.IBEGINOB) THEN
11 FORMAT(A12,2I5,2F12.2,2F12.4)
WRITE(*,11)'SETFGEDIFFGE', NH1, NH,
+ H(NH1),RSTV(NH1)%VAR,
+ ZMHX,ROBDATA8(NCMOER,JDATA)
ENDIF
ENDIF
ENDDO
DEALLOCATE( RSTV )
DEALLOCATE( H )
ENDIF
ENDIF
ENDDO
ENDIF
ENDDO
C
RETURN
END