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! $Header: /home/cvsroot/LMDZ4/libf/filtrez/inifgn.F,v 1.1.1.1 2004/05/19 |
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! 12:53:09 lmdzadmin Exp $ |
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SUBROUTINE inifgn(dv) |
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! ... H.Upadyaya , O.Sharma ... |
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USE dimens_m |
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USE paramet_m |
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USE comgeom |
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USE serre |
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USE coefils |
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IMPLICIT NONE |
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REAL vec(iim, iim), vec1(iim, iim) |
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REAL dlonu(iim), dlonv(iim) |
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REAL du(iim), dv(iim), d(iim) |
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REAL pi |
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INTEGER i, j, k, imm1, nrot |
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EXTERNAL ssum, acc, jacobi |
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! C EXTERNAL eigen |
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REAL ssum |
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imm1 = iim - 1 |
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pi = 2.*asin(1.) |
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DO i = 1, iim |
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dlonu(i) = xprimu(i) |
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dlonv(i) = xprimv(i) |
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END DO |
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DO i = 1, iim |
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sddv(i) = sqrt(dlonv(i)) |
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sddu(i) = sqrt(dlonu(i)) |
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unsddu(i) = 1./sddu(i) |
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unsddv(i) = 1./sddv(i) |
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END DO |
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DO j = 1, iim |
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DO i = 1, iim |
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vec(i, j) = 0. |
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vec1(i, j) = 0. |
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eignfnv(i, j) = 0. |
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eignfnu(i, j) = 0. |
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END DO |
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END DO |
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eignfnv(1, 1) = -1. |
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eignfnv(iim, 1) = 1. |
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DO i = 1, imm1 |
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eignfnv(i+1, i+1) = -1. |
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eignfnv(i, i+1) = 1. |
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END DO |
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DO j = 1, iim |
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DO i = 1, iim |
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eignfnv(i, j) = eignfnv(i, j)/(sddu(i)*sddv(j)) |
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END DO |
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END DO |
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DO j = 1, iim |
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DO i = 1, iim |
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eignfnu(i, j) = -eignfnv(j, i) |
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END DO |
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END DO |
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DO j = 1, iim |
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DO i = 1, iim |
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vec(i, j) = 0.0 |
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vec1(i, j) = 0.0 |
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DO k = 1, iim |
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vec(i, j) = vec(i, j) + eignfnu(i, k)*eignfnv(k, j) |
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vec1(i, j) = vec1(i, j) + eignfnv(i, k)*eignfnu(k, j) |
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END DO |
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END DO |
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END DO |
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CALL jacobi(vec, iim, iim, dv, eignfnv, nrot) |
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CALL acc(eignfnv, d, iim) |
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CALL eigen_sort(dv, eignfnv, iim, iim) |
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CALL jacobi(vec1, iim, iim, du, eignfnu, nrot) |
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CALL acc(eignfnu, d, iim) |
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CALL eigen_sort(du, eignfnu, iim, iim) |
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! c ancienne version avec appels IMSL |
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! CALL MXM(eignfnu,iim,eignfnv,iim,vec,iim) |
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! CALL MXM(eignfnv,iim,eignfnu,iim,vec1,iim) |
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! CALL EVCSF(iim,vec,iim,dv,eignfnv,iim) |
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! CALL acc(eignfnv,d,iim) |
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! CALL eigen(eignfnv,dv) |
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! CALL EVCSF(iim,vec1,iim,du,eignfnu,iim) |
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! CALL acc(eignfnu,d,iim) |
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! CALL eigen(eignfnu,du) |
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RETURN |
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END SUBROUTINE inifgn |
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