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! $Header: /home/cvsroot/LMDZ4/libf/dyn3d/fxysinus.F,v 1.1.1.1 2004/05/19 |
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! 12:53:06 lmdzadmin Exp $ |
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SUBROUTINE fxysinus(rlatu, yprimu, rlatv, yprimv, rlatu1, yprimu1, rlatu2, & |
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yprimu2, rlonu, xprimu, rlonv, xprimv, rlonm025, xprimm025, rlonp025, & |
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xprimp025) |
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USE dimens_m |
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USE paramet_m |
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USE comconst |
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USE nr_util, ONLY: pi |
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IMPLICIT NONE |
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! Calcul des longitudes et des latitudes pour une fonction f(x,y) |
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! avec y = Asin( j ) . |
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! Auteur : P. Le Van |
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INTEGER i, j |
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REAL rlatu(jjp1), yprimu(jjp1), rlatv(jjm), yprimv(jjm), rlatu1(jjm), & |
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yprimu1(jjm), rlatu2(jjm), yprimu2(jjm) |
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REAL rlonu(iip1), xprimu(iip1), rlonv(iip1), xprimv(iip1), rlonm025(iip1), & |
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xprimm025(iip1), rlonp025(iip1), xprimp025(iip1) |
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! $Header: /home/cvsroot/LMDZ4/libf/grid/fxy_sin.h,v 1.1.1.1 2004/05/19 |
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! 12:53:05 lmdzadmin Exp $ |
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! ----------------------------------------------------------------------- |
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! ................................................................ |
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! ................ Fonctions in line ........................... |
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! ................................................................ |
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REAL fy, fx, fxprim, fyprim |
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REAL ri, rj |
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fy(rj) = asin(1.+2.*((1.-rj)/float(jjm))) |
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fyprim(rj) = 1./sqrt((rj-1.)*(jjm+1.-rj)) |
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fx(ri) = 2.*pi/float(iim)*(ri-0.5*float(iim)-1.) |
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! fx ( ri ) = 2.*pi/FLOAT(iim) * ( ri - 0.5* ( FLOAT(iim) + 1.) ) |
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fxprim(ri) = 2.*pi/float(iim) |
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! La valeur de pi est passee par le common/const/ou /const2/ . |
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! Sinon, il faut la calculer avant d'appeler ces fonctions . |
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! ---------------------------------------------------------------- |
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! Fonctions a changer eventuellement, selon x(x) et y(y) choisis . |
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! ----------------------------------------------------------------- |
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! ..... ici, on a l'application particuliere suivante ........ |
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! ************************************** |
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! ** x = 2. * pi/iim * X ** |
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! ** y = pi/jjm * Y ** |
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! ************************************** |
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! .................................................................. |
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! .................................................................. |
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! ----------------------------------------------------------------------- |
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! ...... calcul des latitudes et de y' ..... |
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DO j = 1, jjm + 1 |
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rlatu(j) = fy(float(j)) |
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yprimu(j) = fyprim(float(j)) |
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END DO |
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DO j = 1, jjm |
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rlatv(j) = fy(float(j)+0.5) |
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rlatu1(j) = fy(float(j)+0.25) |
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rlatu2(j) = fy(float(j)+0.75) |
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yprimv(j) = fyprim(float(j)+0.5) |
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yprimu1(j) = fyprim(float(j)+0.25) |
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yprimu2(j) = fyprim(float(j)+0.75) |
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END DO |
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! ..... calcul des longitudes et de x' ..... |
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DO i = 1, iim + 1 |
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rlonv(i) = fx(float(i)) |
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rlonu(i) = fx(float(i)+0.5) |
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rlonm025(i) = fx(float(i)-0.25) |
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rlonp025(i) = fx(float(i)+0.25) |
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xprimv(i) = fxprim(float(i)) |
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xprimu(i) = fxprim(float(i)+0.5) |
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xprimm025(i) = fxprim(float(i)-0.25) |
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xprimp025(i) = fxprim(float(i)+0.25) |
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END DO |
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RETURN |
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END SUBROUTINE fxysinus |
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