[630] | 1 | ! |
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[1403] | 2 | ! $Id: fxhyp.F 1403 2010-07-01 09:02:53Z emillour $ |
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[630] | 3 | ! |
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| 4 | c |
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| 5 | c |
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[764] | 6 | SUBROUTINE fxhyp ( xzoomdeg,grossism,dzooma,tau , |
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[630] | 7 | , rlonm025,xprimm025,rlonv,xprimv,rlonu,xprimu,rlonp025,xprimp025, |
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| 8 | , champmin,champmax ) |
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| 9 | |
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| 10 | c Auteur : P. Le Van |
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| 11 | |
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| 12 | IMPLICIT NONE |
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| 13 | |
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| 14 | c Calcule les longitudes et derivees dans la grille du GCM pour une |
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| 15 | c fonction f(x) a tangente hyperbolique . |
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| 16 | c |
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| 17 | c grossism etant le grossissement ( = 2 si 2 fois, = 3 si 3 fois,etc.) |
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| 18 | c dzoom etant la distance totale de la zone du zoom |
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| 19 | c tau la raideur de la transition de l'interieur a l'exterieur du zoom |
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| 20 | c |
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| 21 | c On doit avoir grossism x dzoom < pi ( radians ) , en longitude. |
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| 22 | c ******************************************************************** |
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| 23 | |
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| 24 | |
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| 25 | INTEGER nmax, nmax2 |
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| 26 | PARAMETER ( nmax = 30000, nmax2 = 2*nmax ) |
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| 27 | c |
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| 28 | LOGICAL scal180 |
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| 29 | PARAMETER ( scal180 = .TRUE. ) |
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| 30 | |
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| 31 | c scal180 = .TRUE. si on veut avoir le premier point scalaire pour |
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| 32 | c une grille reguliere ( grossism = 1.,tau=0.,clon=0. ) a -180. degres. |
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| 33 | c sinon scal180 = .FALSE. |
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| 34 | |
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| 35 | #include "dimensions.h" |
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| 36 | #include "paramet.h" |
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| 37 | |
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| 38 | c ...... arguments d'entree ....... |
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| 39 | c |
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[764] | 40 | REAL xzoomdeg,dzooma,tau,grossism |
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[630] | 41 | |
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| 42 | c ...... arguments de sortie ...... |
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| 43 | |
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| 44 | REAL rlonm025(iip1),xprimm025(iip1),rlonv(iip1),xprimv(iip1), |
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| 45 | , rlonu(iip1),xprimu(iip1),rlonp025(iip1),xprimp025(iip1) |
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| 46 | |
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| 47 | c .... variables locales .... |
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| 48 | c |
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[764] | 49 | REAL dzoom |
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[630] | 50 | REAL*8 xlon(iip1),xprimm(iip1),xuv |
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| 51 | REAL*8 xtild(0:nmax2) |
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| 52 | REAL*8 fhyp(0:nmax2),ffdx,beta,Xprimt(0:nmax2) |
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| 53 | REAL*8 Xf(0:nmax2),xxpr(0:nmax2) |
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| 54 | REAL*8 xvrai(iip1),xxprim(iip1) |
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| 55 | REAL*8 pi,depi,epsilon,xzoom,fa,fb |
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| 56 | REAL*8 Xf1, Xfi , a0,a1,a2,a3,xi2 |
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| 57 | INTEGER i,it,ik,iter,ii,idif,ii1,ii2 |
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| 58 | REAL*8 xi,xo1,xmoy,xlon2,fxm,Xprimin |
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| 59 | REAL*8 champmin,champmax,decalx |
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| 60 | INTEGER is2 |
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| 61 | SAVE is2 |
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| 62 | |
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| 63 | REAL*8 heavyside |
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| 64 | |
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| 65 | pi = 2. * ASIN(1.) |
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| 66 | depi = 2. * pi |
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| 67 | epsilon = 1.e-3 |
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| 68 | xzoom = xzoomdeg * pi/180. |
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| 69 | c |
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| 70 | decalx = .75 |
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| 71 | IF( grossism.EQ.1..AND.scal180 ) THEN |
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| 72 | decalx = 1. |
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| 73 | ENDIF |
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| 74 | |
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| 75 | WRITE(6,*) 'FXHYP scal180,decalx', scal180,decalx |
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| 76 | c |
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[764] | 77 | IF( dzooma.LT.1.) THEN |
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| 78 | dzoom = dzooma * depi |
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| 79 | ELSEIF( dzooma.LT. 25. ) THEN |
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| 80 | WRITE(6,*) ' Le param. dzoomx pour fxhyp est trop petit ! L aug |
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[630] | 81 | ,menter et relancer ! ' |
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| 82 | STOP 1 |
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| 83 | ELSE |
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[764] | 84 | dzoom = dzooma * pi/180. |
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[630] | 85 | ENDIF |
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| 86 | |
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| 87 | WRITE(6,*) ' xzoom( rad.),grossism,tau,dzoom (radians)' |
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| 88 | WRITE(6,24) xzoom,grossism,tau,dzoom |
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| 89 | |
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| 90 | DO i = 0, nmax2 |
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[1403] | 91 | xtild(i) = - pi + REAL(i) * depi /nmax2 |
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[630] | 92 | ENDDO |
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| 93 | |
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| 94 | DO i = nmax, nmax2 |
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| 95 | |
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| 96 | fa = tau* ( dzoom/2. - xtild(i) ) |
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| 97 | fb = xtild(i) * ( pi - xtild(i) ) |
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| 98 | |
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| 99 | IF( 200.* fb .LT. - fa ) THEN |
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| 100 | fhyp ( i) = - 1. |
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| 101 | ELSEIF( 200. * fb .LT. fa ) THEN |
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| 102 | fhyp ( i) = 1. |
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| 103 | ELSE |
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| 104 | IF( ABS(fa).LT.1.e-13.AND.ABS(fb).LT.1.e-13) THEN |
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| 105 | IF( 200.*fb + fa.LT.1.e-10 ) THEN |
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| 106 | fhyp ( i ) = - 1. |
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| 107 | ELSEIF( 200.*fb - fa.LT.1.e-10 ) THEN |
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| 108 | fhyp ( i ) = 1. |
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| 109 | ENDIF |
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| 110 | ELSE |
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| 111 | fhyp ( i ) = TANH ( fa/fb ) |
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| 112 | ENDIF |
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| 113 | ENDIF |
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| 114 | IF ( xtild(i).EQ. 0. ) fhyp(i) = 1. |
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| 115 | IF ( xtild(i).EQ. pi ) fhyp(i) = -1. |
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| 116 | |
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| 117 | ENDDO |
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| 118 | |
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| 119 | cc .... Calcul de beta .... |
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| 120 | |
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| 121 | ffdx = 0. |
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| 122 | |
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| 123 | DO i = nmax +1,nmax2 |
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| 124 | |
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| 125 | xmoy = 0.5 * ( xtild(i-1) + xtild( i ) ) |
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| 126 | fa = tau* ( dzoom/2. - xmoy ) |
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| 127 | fb = xmoy * ( pi - xmoy ) |
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| 128 | |
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| 129 | IF( 200.* fb .LT. - fa ) THEN |
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| 130 | fxm = - 1. |
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| 131 | ELSEIF( 200. * fb .LT. fa ) THEN |
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| 132 | fxm = 1. |
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| 133 | ELSE |
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| 134 | IF( ABS(fa).LT.1.e-13.AND.ABS(fb).LT.1.e-13) THEN |
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| 135 | IF( 200.*fb + fa.LT.1.e-10 ) THEN |
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| 136 | fxm = - 1. |
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| 137 | ELSEIF( 200.*fb - fa.LT.1.e-10 ) THEN |
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| 138 | fxm = 1. |
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| 139 | ENDIF |
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| 140 | ELSE |
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| 141 | fxm = TANH ( fa/fb ) |
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| 142 | ENDIF |
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| 143 | ENDIF |
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| 144 | |
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| 145 | IF ( xmoy.EQ. 0. ) fxm = 1. |
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| 146 | IF ( xmoy.EQ. pi ) fxm = -1. |
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| 147 | |
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| 148 | ffdx = ffdx + fxm * ( xtild(i) - xtild(i-1) ) |
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| 149 | |
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| 150 | ENDDO |
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| 151 | |
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| 152 | beta = ( grossism * ffdx - pi ) / ( ffdx - pi ) |
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| 153 | |
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| 154 | IF( 2.*beta - grossism.LE. 0.) THEN |
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| 155 | WRITE(6,*) ' ** Attention ! La valeur beta calculee dans la rou |
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| 156 | ,tine fxhyp est mauvaise ! ' |
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| 157 | WRITE(6,*)'Modifier les valeurs de grossismx ,tau ou dzoomx ', |
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| 158 | , ' et relancer ! *** ' |
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| 159 | CALL ABORT |
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| 160 | ENDIF |
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| 161 | c |
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| 162 | c ..... calcul de Xprimt ..... |
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| 163 | c |
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| 164 | |
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| 165 | DO i = nmax, nmax2 |
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| 166 | Xprimt(i) = beta + ( grossism - beta ) * fhyp(i) |
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| 167 | ENDDO |
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| 168 | c |
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| 169 | DO i = nmax+1, nmax2 |
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| 170 | Xprimt( nmax2 - i ) = Xprimt( i ) |
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| 171 | ENDDO |
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| 172 | c |
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| 173 | |
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| 174 | c ..... Calcul de Xf ........ |
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| 175 | |
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| 176 | Xf(0) = - pi |
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| 177 | |
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| 178 | DO i = nmax +1, nmax2 |
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| 179 | |
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| 180 | xmoy = 0.5 * ( xtild(i-1) + xtild( i ) ) |
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| 181 | fa = tau* ( dzoom/2. - xmoy ) |
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| 182 | fb = xmoy * ( pi - xmoy ) |
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| 183 | |
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| 184 | IF( 200.* fb .LT. - fa ) THEN |
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| 185 | fxm = - 1. |
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| 186 | ELSEIF( 200. * fb .LT. fa ) THEN |
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| 187 | fxm = 1. |
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| 188 | ELSE |
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| 189 | fxm = TANH ( fa/fb ) |
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| 190 | ENDIF |
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| 191 | |
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| 192 | IF ( xmoy.EQ. 0. ) fxm = 1. |
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| 193 | IF ( xmoy.EQ. pi ) fxm = -1. |
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| 194 | xxpr(i) = beta + ( grossism - beta ) * fxm |
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| 195 | |
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| 196 | ENDDO |
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| 197 | |
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| 198 | DO i = nmax+1, nmax2 |
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| 199 | xxpr(nmax2-i+1) = xxpr(i) |
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| 200 | ENDDO |
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| 201 | |
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| 202 | DO i=1,nmax2 |
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| 203 | Xf(i) = Xf(i-1) + xxpr(i) * ( xtild(i) - xtild(i-1) ) |
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| 204 | ENDDO |
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| 205 | |
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| 206 | |
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| 207 | c ***************************************************************** |
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| 208 | c |
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| 209 | |
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| 210 | c ..... xuv = 0. si calcul aux pts scalaires ........ |
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| 211 | c ..... xuv = 0.5 si calcul aux pts U ........ |
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| 212 | c |
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| 213 | WRITE(6,18) |
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| 214 | c |
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| 215 | DO 5000 ik = 1, 4 |
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| 216 | |
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| 217 | IF( ik.EQ.1 ) THEN |
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| 218 | xuv = -0.25 |
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| 219 | ELSE IF ( ik.EQ.2 ) THEN |
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| 220 | xuv = 0. |
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| 221 | ELSE IF ( ik.EQ.3 ) THEN |
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| 222 | xuv = 0.50 |
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| 223 | ELSE IF ( ik.EQ.4 ) THEN |
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| 224 | xuv = 0.25 |
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| 225 | ENDIF |
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| 226 | |
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| 227 | xo1 = 0. |
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| 228 | |
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| 229 | ii1=1 |
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| 230 | ii2=iim |
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| 231 | IF(ik.EQ.1.and.grossism.EQ.1.) THEN |
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| 232 | ii1 = 2 |
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| 233 | ii2 = iim+1 |
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| 234 | ENDIF |
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| 235 | DO 1500 i = ii1, ii2 |
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| 236 | |
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[1403] | 237 | xlon2 = - pi + (REAL(i) + xuv - decalx) * depi / REAL(iim) |
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[630] | 238 | |
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| 239 | Xfi = xlon2 |
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| 240 | c |
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| 241 | DO 250 it = nmax2,0,-1 |
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| 242 | IF( Xfi.GE.Xf(it)) GO TO 350 |
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| 243 | 250 CONTINUE |
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| 244 | |
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| 245 | it = 0 |
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| 246 | |
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| 247 | 350 CONTINUE |
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| 248 | |
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| 249 | c ...... Calcul de Xf(xi) ...... |
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| 250 | c |
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| 251 | xi = xtild(it) |
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| 252 | |
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| 253 | IF(it.EQ.nmax2) THEN |
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| 254 | it = nmax2 -1 |
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| 255 | Xf(it+1) = pi |
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| 256 | ENDIF |
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| 257 | c ..................................................................... |
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| 258 | c |
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| 259 | c Appel de la routine qui calcule les coefficients a0,a1,a2,a3 d'un |
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| 260 | c polynome de degre 3 qui passe par les points (Xf(it),xtild(it) ) |
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| 261 | c et (Xf(it+1),xtild(it+1) ) |
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| 262 | |
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| 263 | CALL coefpoly ( Xf(it),Xf(it+1),Xprimt(it),Xprimt(it+1), |
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| 264 | , xtild(it),xtild(it+1), a0, a1, a2, a3 ) |
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| 265 | |
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| 266 | Xf1 = Xf(it) |
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| 267 | Xprimin = a1 + 2.* a2 * xi + 3.*a3 * xi *xi |
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| 268 | |
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| 269 | DO 500 iter = 1,300 |
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| 270 | xi = xi - ( Xf1 - Xfi )/ Xprimin |
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| 271 | |
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| 272 | IF( ABS(xi-xo1).LE.epsilon) GO TO 550 |
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| 273 | xo1 = xi |
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| 274 | xi2 = xi * xi |
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| 275 | Xf1 = a0 + a1 * xi + a2 * xi2 + a3 * xi2 * xi |
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| 276 | Xprimin = a1 + 2.* a2 * xi + 3.* a3 * xi2 |
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| 277 | 500 CONTINUE |
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| 278 | WRITE(6,*) ' Pas de solution ***** ',i,xlon2,iter |
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| 279 | STOP 6 |
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| 280 | 550 CONTINUE |
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| 281 | |
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[1403] | 282 | xxprim(i) = depi/ ( REAL(iim) * Xprimin ) |
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[630] | 283 | xvrai(i) = xi + xzoom |
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| 284 | |
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| 285 | 1500 CONTINUE |
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| 286 | |
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| 287 | |
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| 288 | IF(ik.EQ.1.and.grossism.EQ.1.) THEN |
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| 289 | xvrai(1) = xvrai(iip1)-depi |
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| 290 | xxprim(1) = xxprim(iip1) |
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| 291 | ENDIF |
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| 292 | DO i = 1 , iim |
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| 293 | xlon(i) = xvrai(i) |
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| 294 | xprimm(i) = xxprim(i) |
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| 295 | ENDDO |
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| 296 | DO i = 1, iim -1 |
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| 297 | IF( xvrai(i+1). LT. xvrai(i) ) THEN |
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| 298 | WRITE(6,*) ' PBS. avec rlonu(',i+1,') plus petit que rlonu(',i, |
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| 299 | , ')' |
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| 300 | STOP 7 |
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| 301 | ENDIF |
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| 302 | ENDDO |
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| 303 | c |
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| 304 | c ... Reorganisation des longitudes pour les avoir entre - pi et pi .. |
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| 305 | c ........................................................................ |
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| 306 | |
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| 307 | champmin = 1.e12 |
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| 308 | champmax = -1.e12 |
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| 309 | DO i = 1, iim |
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| 310 | champmin = MIN( champmin,xvrai(i) ) |
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| 311 | champmax = MAX( champmax,xvrai(i) ) |
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| 312 | ENDDO |
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| 313 | |
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| 314 | IF(champmin .GE.-pi-0.10.and.champmax.LE.pi+0.10 ) THEN |
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| 315 | GO TO 1600 |
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| 316 | ELSE |
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| 317 | WRITE(6,*) 'Reorganisation des longitudes pour avoir entre - pi', |
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| 318 | , ' et pi ' |
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| 319 | c |
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| 320 | IF( xzoom.LE.0.) THEN |
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| 321 | IF( ik.EQ. 1 ) THEN |
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| 322 | DO i = 1, iim |
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| 323 | IF( xvrai(i).GE. - pi ) GO TO 80 |
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| 324 | ENDDO |
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| 325 | WRITE(6,*) ' PBS. 1 ! Xvrai plus petit que - pi ! ' |
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| 326 | STOP 8 |
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| 327 | 80 CONTINUE |
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| 328 | is2 = i |
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| 329 | ENDIF |
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| 330 | |
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| 331 | IF( is2.NE. 1 ) THEN |
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| 332 | DO ii = is2 , iim |
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| 333 | xlon (ii-is2+1) = xvrai(ii) |
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| 334 | xprimm(ii-is2+1) = xxprim(ii) |
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| 335 | ENDDO |
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| 336 | DO ii = 1 , is2 -1 |
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| 337 | xlon (ii+iim-is2+1) = xvrai(ii) + depi |
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| 338 | xprimm(ii+iim-is2+1) = xxprim(ii) |
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| 339 | ENDDO |
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| 340 | ENDIF |
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| 341 | ELSE |
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| 342 | IF( ik.EQ.1 ) THEN |
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| 343 | DO i = iim,1,-1 |
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| 344 | IF( xvrai(i).LE. pi ) GO TO 90 |
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| 345 | ENDDO |
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| 346 | WRITE(6,*) ' PBS. 2 ! Xvrai plus grand que pi ! ' |
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| 347 | STOP 9 |
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| 348 | 90 CONTINUE |
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| 349 | is2 = i |
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| 350 | ENDIF |
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| 351 | idif = iim -is2 |
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| 352 | DO ii = 1, is2 |
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| 353 | xlon (ii+idif) = xvrai(ii) |
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| 354 | xprimm(ii+idif) = xxprim(ii) |
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| 355 | ENDDO |
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| 356 | DO ii = 1, idif |
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| 357 | xlon (ii) = xvrai (ii+is2) - depi |
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| 358 | xprimm(ii) = xxprim(ii+is2) |
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| 359 | ENDDO |
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| 360 | ENDIF |
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| 361 | ENDIF |
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| 362 | c |
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| 363 | c ......... Fin de la reorganisation ............................ |
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| 364 | |
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| 365 | 1600 CONTINUE |
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| 366 | |
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| 367 | |
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| 368 | xlon ( iip1) = xlon(1) + depi |
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| 369 | xprimm( iip1 ) = xprimm (1 ) |
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| 370 | |
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| 371 | DO i = 1, iim+1 |
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| 372 | xvrai(i) = xlon(i)*180./pi |
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| 373 | ENDDO |
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| 374 | |
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| 375 | IF( ik.EQ.1 ) THEN |
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| 376 | c WRITE(6,*) ' XLON aux pts. V-0.25 apres ( en deg. ) ' |
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| 377 | c WRITE(6,18) |
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| 378 | c WRITE(6,68) xvrai |
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| 379 | c WRITE(6,*) ' XPRIM k ',ik |
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| 380 | c WRITE(6,566) xprimm |
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| 381 | |
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| 382 | DO i = 1,iim +1 |
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| 383 | rlonm025(i) = xlon( i ) |
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| 384 | xprimm025(i) = xprimm(i) |
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| 385 | ENDDO |
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| 386 | ELSE IF( ik.EQ.2 ) THEN |
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| 387 | c WRITE(6,18) |
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| 388 | c WRITE(6,*) ' XLON aux pts. V apres ( en deg. ) ' |
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| 389 | c WRITE(6,68) xvrai |
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| 390 | c WRITE(6,*) ' XPRIM k ',ik |
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| 391 | c WRITE(6,566) xprimm |
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| 392 | |
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| 393 | DO i = 1,iim + 1 |
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| 394 | rlonv(i) = xlon( i ) |
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| 395 | xprimv(i) = xprimm(i) |
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| 396 | ENDDO |
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| 397 | |
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| 398 | ELSE IF( ik.EQ.3) THEN |
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| 399 | c WRITE(6,18) |
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| 400 | c WRITE(6,*) ' XLON aux pts. U apres ( en deg. ) ' |
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| 401 | c WRITE(6,68) xvrai |
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| 402 | c WRITE(6,*) ' XPRIM ik ',ik |
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| 403 | c WRITE(6,566) xprimm |
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| 404 | |
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| 405 | DO i = 1,iim + 1 |
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| 406 | rlonu(i) = xlon( i ) |
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| 407 | xprimu(i) = xprimm(i) |
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| 408 | ENDDO |
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| 409 | |
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| 410 | ELSE IF( ik.EQ.4 ) THEN |
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| 411 | c WRITE(6,18) |
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| 412 | c WRITE(6,*) ' XLON aux pts. V+0.25 apres ( en deg. ) ' |
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| 413 | c WRITE(6,68) xvrai |
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| 414 | c WRITE(6,*) ' XPRIM ik ',ik |
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| 415 | c WRITE(6,566) xprimm |
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| 416 | |
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| 417 | DO i = 1,iim + 1 |
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| 418 | rlonp025(i) = xlon( i ) |
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| 419 | xprimp025(i) = xprimm(i) |
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| 420 | ENDDO |
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| 421 | |
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| 422 | ENDIF |
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| 423 | |
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| 424 | 5000 CONTINUE |
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| 425 | c |
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| 426 | WRITE(6,18) |
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| 427 | c |
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| 428 | c ........... fin de la boucle do 5000 ............ |
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| 429 | |
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| 430 | DO i = 1, iim |
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| 431 | xlon(i) = rlonv(i+1) - rlonv(i) |
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| 432 | ENDDO |
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| 433 | champmin = 1.e12 |
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| 434 | champmax = -1.e12 |
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| 435 | DO i = 1, iim |
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| 436 | champmin = MIN( champmin, xlon(i) ) |
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| 437 | champmax = MAX( champmax, xlon(i) ) |
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| 438 | ENDDO |
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| 439 | champmin = champmin * 180./pi |
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| 440 | champmax = champmax * 180./pi |
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| 441 | |
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| 442 | 18 FORMAT(/) |
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| 443 | 24 FORMAT(2x,'Parametres xzoom,gross,tau ,dzoom pour fxhyp ',4f8.3) |
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| 444 | 68 FORMAT(1x,7f9.2) |
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| 445 | 566 FORMAT(1x,7f9.4) |
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| 446 | |
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| 447 | RETURN |
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| 448 | END |
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