1 | SUBROUTINE fxhyp ( xzoomdeg,grossism,dzoom,tau , |
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2 | , rlonm025,xprimm025,rlonv,xprimv,rlonu,xprimu,rlonp025,xprimp025) |
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3 | |
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4 | c Auteur : P. Le Van |
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5 | |
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6 | IMPLICIT NONE |
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7 | |
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8 | c Calcule les longitudes et derivees dans la grille du GCM pour une |
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9 | c fonction f(x) a tangente hyperbolique . |
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10 | c |
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11 | c grossism etant le grossissement ( = 2 si 2 fois, = 3 si 3 fois,etc.) |
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12 | c dzoom etant la distance totale de la zone du zoom |
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13 | c tau la transition , normalement = 1 . |
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14 | c |
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15 | |
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16 | INTEGER nmax, nmax2 |
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17 | PARAMETER ( nmax = 50000, nmax2 = 2*nmax ) |
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18 | |
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19 | #include "dimensions.h" |
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20 | #include "paramet.h" |
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21 | |
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22 | c ...... arguments d'entree ....... |
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23 | c |
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24 | REAL xzoomdeg,dzoom,tau,grossism |
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25 | REAL rlonm025(iip1),xprimm025(iip1),rlonv(iip1),xprimv(iip1), |
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26 | , rlonu(iip1),xprimu(iip1),rlonp025(iip1),xprimp025(iip1) |
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27 | |
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28 | c ...... arguments de sortie ...... |
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29 | c |
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30 | REAL xlon(iip1),xprimm(iip1),xuv |
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31 | REAL xtild(0:nmax2) |
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32 | REAL fhyp(0:nmax),ffdx(0:nmax),beta,Xprimt(0:nmax2) |
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33 | REAL Xf(0:nmax2),xxpr(0:nmax2) |
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34 | REAL xvrai(iip1),xxprim(iip1) |
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35 | REAL pi,depi,epsilon,xzoom |
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36 | INTEGER i,it,ik,iter,ii,idif |
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37 | REAL xi,xo1,xint,xmoy,xlon2,fxm,Xprimin |
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38 | REAL champmin,champmax |
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39 | INTEGER is2 |
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40 | SAVE is2 |
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41 | REAL dlon1(iip1),dlon2(iip1),dlon3(iip1) |
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42 | |
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43 | pi = 2. * ASIN(1.) |
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44 | depi = 2. * pi |
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45 | epsilon = 1.e-6 |
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46 | xzoom = xzoomdeg * pi/180. |
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47 | |
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48 | |
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49 | |
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50 | DO i = 0, nmax2 |
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51 | xtild(i) = FLOAT(i) /nmax2 |
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52 | IF( xtild(i).EQ. 0.5 ) xtild(i) = xtild(i) + 1.e-6 |
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53 | ENDDO |
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54 | |
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55 | DO i = 1, nmax |
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56 | fhyp(i) = TANH ( ( xtild(i) - 0.5*(1.- dzoom) ) / |
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57 | , ( tau * xtild(i) * ( 0.5 -xtild(i))) ) |
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58 | ENDDO |
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59 | |
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60 | fhyp( 0 ) = - 1. |
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61 | fhyp( nmax ) = 1. |
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62 | |
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63 | cc .... Calcul de beta .... |
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64 | c |
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65 | ffdx( 0 ) = 0. |
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66 | |
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67 | DO i = 1, nmax |
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68 | xmoy = 0.5 * ( xtild(i-1) + xtild( i ) ) |
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69 | fxm = TANH ( ( xmoy - 0.5 * ( 1. - dzoom ) ) / |
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70 | , ( tau * xmoy * ( 0.5 -xmoy)) ) |
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71 | ffdx(i) = ffdx(i-1) + fxm * ( xtild(i) - xtild(i-1) ) |
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72 | ENDDO |
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73 | |
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74 | beta = ( grossism * ffdx(nmax) - 0.5 ) / ( ffdx(nmax) - 0.5 ) |
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75 | c |
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76 | c ..... calcul de Xprimt ..... |
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77 | c |
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78 | |
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79 | DO i = 0, nmax |
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80 | Xprimt(i) = beta + ( grossism - beta ) * fhyp(i) |
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81 | ENDDO |
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82 | c |
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83 | DO i = 0, nmax |
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84 | Xprimt( nmax2 - i ) = Xprimt( i ) |
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85 | ENDDO |
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86 | c |
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87 | |
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88 | c ..... Calcul de Xf ........ |
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89 | |
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90 | Xf(0) = 0. |
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91 | DO i = 1, nmax |
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92 | xmoy = 0.5 * ( xtild(i-1) + xtild( i ) ) |
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93 | fxm = TANH ( ( xmoy - 0.5 * ( 1. - dzoom ) ) / |
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94 | , ( tau * xmoy * ( 0.5 -xmoy)) ) |
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95 | xxpr(i) = beta + ( grossism - beta ) * fxm |
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96 | ENDDO |
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97 | |
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98 | DO i = 1,nmax |
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99 | xxpr(nmax2-i+1) = xxpr(i) |
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100 | ENDDO |
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101 | |
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102 | DO i=1,nmax2 |
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103 | Xf(i) = Xf(i-1) + xxpr(i) * ( xtild(i) - xtild(i-1) ) |
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104 | ENDDO |
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105 | do i=1,nmax2 |
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106 | xf(i)=xf(i)/xf(nmax2) |
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107 | enddo |
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108 | |
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109 | |
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110 | PRINT *,' XF ',xf(0),xf(nmax),xf(nmax2) |
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111 | |
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112 | |
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113 | c ***************************************************************** |
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114 | c |
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115 | |
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116 | c ..... xuv = 0. si calcul aux pts scalaires ........ |
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117 | c ..... xuv = 0.5 si calcul aux pts U ........ |
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118 | c |
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119 | c |
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120 | DO 5000 ik = 1, 4 |
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121 | |
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122 | IF( ik.EQ.1 ) THEN |
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123 | xuv = - 0.25 |
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124 | ELSE IF ( ik.EQ.2 ) THEN |
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125 | xuv = 0. |
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126 | ELSE IF ( ik.EQ.3 ) THEN |
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127 | xuv = 0.5 |
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128 | ELSE IF ( ik.EQ.4 ) THEN |
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129 | xuv = 0.25 |
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130 | ENDIF |
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131 | |
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132 | |
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133 | DO 1500 i = 1, iim |
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134 | |
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135 | xlon2 = ( FLOAT(i) + xuv - 0.75) / FLOAT(iim) |
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136 | |
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137 | xo1 = 0. |
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138 | xi = xlon2 |
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139 | c |
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140 | DO 500 iter = 1,300 |
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141 | |
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142 | DO 250 it = nmax2,0,-1 |
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143 | IF( xi.GE.xtild(it)) GO TO 350 |
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144 | 250 CONTINUE |
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145 | |
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146 | it = 0 |
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147 | xi = xtild(it) |
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148 | |
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149 | 350 CONTINUE |
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150 | IF(it.EQ.nmax2) THEN |
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151 | it = nmax2 -1 |
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152 | xf(it+1) = 1. |
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153 | ENDIF |
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154 | c ................................................................. |
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155 | c .... Interpolation entre xi(it) et xi(it+1) pour avoir X(xi) |
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156 | c ..... et X'(xi) ..... |
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157 | c ................................................................. |
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158 | |
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159 | xint = ( Xf(it+1)-Xf(it) ) / ( xtild(it+1)-xtild(it) ) * |
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160 | + ( xi-xtild(it) ) + Xf(it) |
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161 | Xprimin = ( Xprimt(it+1)-Xprimt(it) )/ ( xtild(it+1)-xtild(it) ) * |
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162 | + ( xi-xtild(it) ) + Xprimt(it) |
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163 | |
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164 | xi = xi - (xint-xlon2)/Xprimin |
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165 | |
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166 | IF( ABS(xi-xo1).LE.epsilon) GO TO 550 |
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167 | xo1 = xi |
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168 | c |
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169 | 500 CONTINUE |
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170 | PRINT *,' *** PAS DE SOLUTION **** ',i,xlon2 |
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171 | STOP 4 |
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172 | 550 CONTINUE |
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173 | |
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174 | xxprim(i) = depi/( FLOAT(iim) * Xprimin) |
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175 | xvrai(i) = depi * (xi - 0.5) + xzoom |
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176 | |
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177 | |
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178 | 1500 CONTINUE |
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179 | |
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180 | DO i = 1 , iim |
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181 | xlon (i) = xvrai(i) |
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182 | xprimm(i) = xxprim(i) |
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183 | cc xxlon(i) = xlon(i)*180./pi |
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184 | ENDDO |
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185 | |
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186 | cc PRINT *,' XLON avant ' |
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187 | cc PRINT 68,(xxlon(i),i=1,iim) |
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188 | |
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189 | DO i = 1, iim -1 |
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190 | IF( xvrai(i+1). LT. xvrai(i) ) THEN |
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191 | PRINT *,' PBS. avec rlonu(',i+1,' plus petit que rlonu(',i, |
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192 | , ')' |
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193 | STOP |
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194 | ENDIF |
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195 | ENDDO |
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196 | c |
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197 | c ... Reorganisation des longitudes pour les avoir entre - pi et pi .. |
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198 | c ........................................................................ |
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199 | |
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200 | champmin = 1.e12 |
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201 | champmax = -1.e12 |
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202 | DO i = 1, iim |
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203 | champmin = MIN( champmin,xvrai(i) ) |
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204 | champmax = MAX( champmax,xvrai(i) ) |
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205 | ENDDO |
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206 | |
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207 | PRINT *,' LONGITUDES min max ',champmin,champmax |
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208 | |
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209 | IF(champmin .GE. - pi .AND. champmax.LE. pi ) THEN |
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210 | GO TO 1600 |
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211 | ELSE |
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212 | PRINT 18 |
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213 | PRINT *,'Reorganisation des longitudes pour avoir entre - pi ', |
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214 | , ' et pi ' |
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215 | c |
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216 | IF( xzoom.LE.0.) THEN |
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217 | IF( ik.EQ. 1 ) THEN |
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218 | DO i = 1, iim |
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219 | IF( xvrai(i).GE. - pi ) GO TO 80 |
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220 | ENDDO |
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221 | PRINT *, ' PBS. 1 ' |
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222 | STOP |
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223 | 80 CONTINUE |
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224 | is2 = i |
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225 | ENDIF |
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226 | |
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227 | IF( is2.NE. 1 ) THEN |
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228 | DO ii = is2 , iim |
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229 | xlon (ii-is2+1) = xvrai(ii) |
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230 | xprimm(ii-is2+1) = xxprim(ii) |
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231 | ENDDO |
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232 | DO ii = 1 , is2 -1 |
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233 | xlon (ii+iim-is2+1) = xvrai(ii) + depi |
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234 | xprimm(ii+iim-is2+1) = xxprim(ii) |
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235 | ENDDO |
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236 | ENDIF |
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237 | ELSE |
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238 | IF( ik.EQ.1 ) THEN |
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239 | DO i = iim,1,-1 |
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240 | IF( xvrai(i).LE. pi ) GO TO 90 |
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241 | ENDDO |
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242 | PRINT *,' PBS. 2 ' |
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243 | STOP |
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244 | 90 CONTINUE |
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245 | is2 = i |
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246 | ENDIF |
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247 | cc PRINT *,' IS2 ',is2 |
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248 | idif = iim -is2 |
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249 | DO ii = 1, is2 |
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250 | xlon (ii+idif) = xvrai(ii) |
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251 | xprimm(ii+idif) = xxprim(ii) |
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252 | ENDDO |
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253 | DO ii = 1, idif |
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254 | xlon (ii) = xvrai (ii+is2) - depi |
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255 | xprimm(ii) = xxprim(ii+is2) |
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256 | ENDDO |
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257 | ENDIF |
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258 | ENDIF |
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259 | c |
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260 | c ......... Fin de la reorganisation ............................ |
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261 | |
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262 | 1600 CONTINUE |
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263 | |
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264 | |
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265 | xlon ( iip1) = xlon(1) + depi |
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266 | xprimm( iip1 ) = xprimm (1 ) |
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267 | |
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268 | DO i = 1, iim+1 |
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269 | xvrai(i) = xlon(i)*180./pi |
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270 | ENDDO |
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271 | |
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272 | |
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273 | IF( ik.EQ.1 ) THEN |
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274 | PRINT *, ' XLON aux pts. V-0.25 apres ( en deg. ) ' |
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275 | PRINT 18 |
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276 | PRINT 68,xvrai |
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277 | PRINT *,' XPRIM ' |
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278 | PRINT 68, xprimm |
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279 | DO i = 1,iim + 1 |
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280 | rlonm025(i) = xlon( i ) |
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281 | xprimm025(i) = xprimm(i) |
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282 | ENDDO |
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283 | ELSE IF( ik.EQ.2 ) THEN |
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284 | PRINT 18 |
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285 | PRINT *, ' XLON aux pts. V apres ( en deg. ) ' |
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286 | PRINT 68,xvrai |
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287 | PRINT *,' XPRIM ' |
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288 | PRINT 68, xprimm |
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289 | DO i = 1,iim + 1 |
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290 | rlonv(i) = xlon( i ) |
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291 | xprimv(i) = xprimm(i) |
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292 | ENDDO |
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293 | ELSE IF( ik.EQ.3 ) THEN |
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294 | PRINT 18 |
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295 | PRINT *, ' XLON aux pts. U apres ( en deg. ) ' |
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296 | PRINT 68,xvrai |
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297 | PRINT *,' XPRIM ' |
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298 | PRINT 68, xprimm |
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299 | DO i = 1,iim + 1 |
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300 | rlonu(i) = xlon( i ) |
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301 | xprimu(i) = xprimm(i) |
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302 | ENDDO |
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303 | ELSE IF( ik.EQ.4 ) THEN |
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304 | PRINT 18 |
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305 | PRINT *, ' XLON aux pts. V+0.25 apres ( en deg. ) ' |
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306 | PRINT 68,xvrai |
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307 | PRINT *,' XPRIM ' |
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308 | PRINT 68, xprimm |
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309 | DO i = 1,iim + 1 |
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310 | rlonp025(i) = xlon( i ) |
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311 | xprimp025(i) = xprimm(i) |
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312 | ENDDO |
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313 | ENDIF |
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314 | |
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315 | 5000 CONTINUE |
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316 | c |
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317 | c ........... fin de la boucle do 5000 ............ |
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318 | |
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319 | c |
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320 | DO i = 1, iim + 1 |
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321 | dlon1(i) = rlonm025(i) - rlonv(i) |
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322 | dlon2(i) = rlonm025(i) - rlonp025(i) |
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323 | dlon3(i) = rlonm025(i) - rlonu(i) |
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324 | ENDDO |
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325 | |
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326 | DO i = 1, iim + 1 |
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327 | rlonm025(i) = rlonm025(i) + dlon1(i) |
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328 | ENDDO |
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329 | |
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330 | DO i = 1, iim + 1 |
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331 | rlonv(i) = rlonm025(i) - dlon1(i) |
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332 | rlonp025(i) = rlonm025(i) - dlon2(i) |
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333 | rlonu(i) = rlonm025(i) - dlon3(i) |
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334 | ENDDO |
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335 | |
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336 | DO i = 1, iim |
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337 | xprimu (i) = rlonu(i+1) - rlonu(i) |
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338 | xprimv (i) = rlonv(i+1) - rlonv(i) |
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339 | xprimm025(i) = rlonm025(i+1) - rlonm025(i) |
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340 | xprimp025(i) = rlonp025(i+1) - rlonp025(i) |
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341 | ENDDO |
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342 | xprimu (iip1) = xprimu (1) |
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343 | xprimv (iip1) = xprimv (1) |
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344 | xprimm025(iip1) = xprimm025(1) |
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345 | xprimp025(iip1) = xprimp025(1) |
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346 | |
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347 | |
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348 | 18 FORMAT(/) |
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349 | 68 FORMAT(1x,7f9.2) |
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350 | |
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351 | |
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352 | RETURN |
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353 | END |
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