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