[2] | 1 | ;+ |
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[163] | 2 | ; @file_comments |
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| 3 | ; |
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| 4 | ; @categories |
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| 5 | ; |
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| 6 | ; @param SN |
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| 7 | ; |
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| 8 | ; @param TN |
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| 9 | ; |
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| 10 | ; @keyword INSITU |
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| 11 | ; |
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| 12 | ; @keyword SIGMA_N |
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| 13 | ; |
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| 14 | ; @returns |
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| 15 | ; |
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| 16 | ; @uses |
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| 17 | ; |
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| 18 | ; @restrictions |
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| 19 | ; |
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| 20 | ; @examples |
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| 21 | ; |
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| 22 | ; @history |
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| 23 | ; |
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| 24 | ; @version |
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| 25 | ; $Id$ |
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| 26 | ; |
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[231] | 27 | ;; |
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| 28 | ;; Calcul de la fonction d'etat (issue de eos.F) |
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| 29 | ;; |
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| 30 | ;; Creation : 1997 / G. Roullet |
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| 31 | ;; adaptation pour les tableaux z,zt,xyz,xyzt |
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| 32 | ;; par seb. |
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| 33 | ;; |
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[142] | 34 | ; @todo seb |
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| 35 | ; |
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[2] | 36 | ;- |
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[231] | 37 | ; |
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[97] | 38 | FUNCTION rhon, sn, tn, INSITU = insitu, SIGMA_N = sigma_n |
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[114] | 39 | ; |
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| 40 | compile_opt idl2, strictarrsubs |
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| 41 | ; |
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[97] | 42 | @common |
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| 43 | tempsun = systime(1) ; pour key_performance |
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[2] | 44 | sn = -1e5 > double(sn) < 1e5 |
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| 45 | tn = -1e5 > double(tn) < 1e5 |
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| 46 | |
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| 47 | |
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| 48 | IF keyword_set(sigma_n) then insitu = 1 |
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| 49 | |
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| 50 | taille = size(sn) |
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| 51 | case taille[0] of |
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| 52 | 0:BEGIN ;z |
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| 53 | zrhop=0d |
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| 54 | jkmax = 1 |
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[231] | 55 | END |
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[2] | 56 | 1:BEGIN ;z |
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| 57 | zrhop=dblarr(taille[1]) |
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| 58 | jkmax = taille[1] |
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[231] | 59 | END |
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[2] | 60 | 2:BEGIN ;xy (jpt=1) ou zt |
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| 61 | zrhop=dblarr(taille[1],taille[2]) |
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| 62 | if jpt EQ 1 then jkmax = 1 ELSE jkmax = taille[1] |
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[231] | 63 | END |
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[2] | 64 | 3:BEGIN ;xyz (jpt=1) ou xyt |
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| 65 | zrhop=dblarr(taille[1],taille[2],taille[3]) |
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| 66 | if jpt EQ 1 then jkmax = taille[3] ELSE jkmax = 1 |
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[231] | 67 | END |
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[2] | 68 | 4:BEGIN ;xyzt |
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| 69 | zrhop=dblarr(taille[1],taille[2],taille[3],taille[4] ) |
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| 70 | jkmax = taille[3] |
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[231] | 71 | END |
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[2] | 72 | endcase |
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| 73 | |
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| 74 | |
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[231] | 75 | |
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[2] | 76 | FOR jk = 0, jkmax-1 DO BEGIN |
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| 77 | |
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| 78 | case taille[0] of |
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| 79 | 0:BEGIN ;z |
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| 80 | ztt = tn |
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| 81 | zs = sn |
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[231] | 82 | END |
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[2] | 83 | 1:BEGIN ;z |
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| 84 | ztt = tn[jk] |
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[231] | 85 | zs = sn[jk] |
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| 86 | END |
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[2] | 87 | 2:BEGIN ;xy (jpt=1) ou zt |
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| 88 | if jpt EQ 1 then begin |
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| 89 | ztt = tn |
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| 90 | zs = sn |
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| 91 | ENDIF ELSE BEGIN |
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| 92 | ztt = tn[jk, *] |
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[231] | 93 | zs = sn[jk, *] |
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[2] | 94 | ENDELSE |
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[231] | 95 | END |
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[2] | 96 | 3:BEGIN ;xyz (jpt=1) ou xyt |
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| 97 | if jpt EQ 1 then begin |
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| 98 | ztt = tn[*, *, jk] |
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[231] | 99 | zs = sn[*, *,jk] |
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[2] | 100 | endif ELSE BEGIN |
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| 101 | ztt = tn |
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| 102 | zs = sn |
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| 103 | ENDELSE |
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[231] | 104 | END |
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[2] | 105 | 4:BEGIN ;xyzt |
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| 106 | ztt = tn[*, *, jk, *] |
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[231] | 107 | zs = sn[*, *,jk, *] |
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| 108 | END |
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[2] | 109 | endcase |
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[114] | 110 | if n_elements(sigma_n) NE 0 then zh = 1000.*sigma_n ELSE zh = gdept[jk] |
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[2] | 111 | ; ... square root salinity |
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| 112 | zsr= sqrt(abs(zs)) |
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| 113 | ; ... compute density pure water at atm pressure |
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| 114 | zr1=((((6.536332e-9*ztt-1.120083e-6)*ztt+1.001685e-4)*ztt-9.095290e-3)*ztt+6.793952e-2)*ztt+999.842594 |
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| 115 | ; ... seawater density atm pressure |
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| 116 | zr2= (((5.3875e-9*ztt-8.2467e-7)*ztt+7.6438e-5)*ztt-4.0899e-3)*ztt+0.824493 |
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| 117 | zr3= (-1.6546e-6*ztt+1.0227e-4)*ztt-5.72466e-3 |
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| 118 | zr4= 4.8314e-4 |
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| 119 | ; |
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| 120 | ; ... potential density (reference to the surface) |
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| 121 | case taille[0] of |
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| 122 | 0: zrhop = (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
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[114] | 123 | 1: zrhop[jk]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
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[231] | 124 | 2:BEGIN |
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[2] | 125 | if jpt EQ 1 then zrhop = (zr4*zs + zr3*zsr + zr2)*zs + zr1 $ |
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[114] | 126 | ELSE zrhop[jk, *]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
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[2] | 127 | END |
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[231] | 128 | 3:BEGIN |
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[114] | 129 | if jpt EQ 1 then zrhop[*, *,jk]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 $ |
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[2] | 130 | ELSE zrhop = (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
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| 131 | END |
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[114] | 132 | 4: zrhop[*, *,jk, *]= (zr4*zs + zr3*zsr + zr2)*zs + zr1 |
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[2] | 133 | endcase |
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| 134 | |
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[231] | 135 | IF n_elements(insitu) EQ 1 THEN BEGIN |
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[2] | 136 | ; ... add the compression terms |
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| 137 | ze = (-3.508914e-8*ztt-1.248266e-8)*ztt-2.595994e-6 |
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| 138 | zbw= ( 1.296821e-6*ztt-5.782165e-9)*ztt+1.045941e-4 |
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| 139 | zb = zbw + ze * zs |
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| 140 | ; |
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| 141 | zd = -2.042967e-2 |
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| 142 | zc = (-7.267926e-5*ztt+2.598241e-3)*ztt+0.1571896 |
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| 143 | zaw = ((5.939910e-6*ztt+2.512549e-3)*ztt-0.1028859)*ztt -4.721788 |
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| 144 | za = ( zd*zsr + zc)*zs + zaw |
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| 145 | ; |
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| 146 | zb1= (-0.1909078*ztt+7.390729)*ztt-55.87545 |
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| 147 | za1= ((2.326469e-3*ztt+1.553190)*ztt-65.00517)*ztt+1044.077 |
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| 148 | zkw= (((-1.361629e-4*ztt-1.852732e-2)*ztt-30.41638)*ztt+2098.925)*ztt+190925.6 |
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| 149 | zk0= (zb1*zsr + za1)*zs + zkw |
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| 150 | ; |
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| 151 | ; ... masked in situ density |
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| 152 | case taille[0] of |
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| 153 | 0: zrhop = zrhop / (1.0-zh/(zk0-zh*(za-zh*zb))) |
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[114] | 154 | 1: zrhop[jk] = zrhop[jk] / (1.0-zh/(zk0-zh*(za-zh*zb))) |
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[231] | 155 | 2:BEGIN |
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[2] | 156 | if jpt EQ 1 then zrhop = zrhop / (1.0-zh/(zk0-zh*(za-zh*zb))) $ |
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[114] | 157 | ELSE zrhop[jk, *] = zrhop[jk, *] / (1.0-zh/(zk0-zh*(za-zh*zb))) |
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[2] | 158 | END |
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[231] | 159 | 3:BEGIN |
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[114] | 160 | if jpt EQ 1 then zrhop[*, *,jk] = zrhop[*, *,jk] / (1.0-zh/(zk0-zh*(za-zh*zb))) $ |
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[2] | 161 | ELSE zrhop = zrhop / (1.0-zh/(zk0-zh*(za-zh*zb))) |
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| 162 | END |
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[114] | 163 | 4: zrhop[*, *,jk, *] = zrhop[*, *,jk, *] / (1.0-zh/(zk0-zh*(za-zh*zb))) |
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[2] | 164 | endcase |
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[231] | 165 | |
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| 166 | ENDIF |
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| 167 | ENDFOR |
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| 168 | |
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[2] | 169 | terre = where(tn GE 1e6) |
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| 170 | if terre[0] NE -1 then zrhop[terre] = valmask |
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| 171 | |
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[231] | 172 | if keyword_set(key_performance) THEN print, 'temps rhon', systime(1)-tempsun |
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[2] | 173 | |
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[231] | 174 | |
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[2] | 175 | return, zrhop |
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[231] | 176 | END |
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