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* $Id$ |
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* |
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* $Log$ |
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* |
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*CMZ : 2.01/00 06/03/2000 13.07.03 by Francesco Cafagna |
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*CMZ : 2.00/00 03/03/2000 15.39.05 by Francesco Cafagna |
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*CMZU: 1.01/00 26/04/96 15.12.30 by Paolo (The Magic) Papini |
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*-- Author : |
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SUBROUTINE GUFLD(V,F) |
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************************************************************************ |
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* * |
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* To map Pamela magnetic field * |
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* A bit of housekeeping: delete print statement etc. etc., by F. Caf. * |
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* * |
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* Variables definition: * |
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* IN: * |
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* V , vector with coordinates in MARS * |
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* OUT: * |
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* F , Magnetic field components along X, Y and Z * |
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* * |
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* Called by: GHELIX, GRKUTA * |
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* Author: Paolo Papini 16/02/96 * |
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* * |
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************************************************************************ |
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#include "gpfield.inc" |
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* |
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INTEGER II,III |
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REAL DISM,F0X,F0Y,F0Z,F1X,F1Y,F1Z,F2X,F2Y,F2Z, |
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+ F3X,F3Y,F3Z |
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REAL V(3),F(3),AV(3) |
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* |
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* Transform coordinates to Spectrometer frame |
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* |
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CALL GPMASPE(V) |
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* |
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* Take just the absolute value for the coordinates |
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* |
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DO I=1,3 |
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AV(I) = ABS( V(I) ) |
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ENDDO |
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F(1)=0. |
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F(2)=0. |
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F(3)=0. |
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* |
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* Check if we are outside the map |
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* |
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IF( (AV(1).GE.20).OR.(AV(2).GE.20).OR.(AV(3).GE.60.) ) |
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+ GOTO 10 |
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IV(1)=INT(AV(1)*2.)+1 |
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IV(2)=INT(AV(2)*2.)+1 |
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IV(3)=INT(AV(3)/2.)+1 |
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DO I1=0,1 |
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DO I2=0,1 |
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DO I3=0,1 |
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II=I1*4+I2*2+I3+1 |
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VV(II,1)=FLOAT(IV(1)+I1-1)*0.5 |
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VV(II,2)=FLOAT(IV(2)+I2-1)*0.5 |
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VV(II,3)=FLOAT(IV(3)+I3-1)*2. |
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IVV(II,1)=IV(1)+I1 |
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IVV(II,2)=IV(2)+I2 |
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IVV(II,3)=IV(3)+I3 |
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DD(II)=(VV(II,1)-AV(1))**2 + (VV(II,2)-AV(2))**2 + |
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+ (VV(II,3)-AV(3))**2 |
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ENDDO |
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ENDDO |
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ENDDO |
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* --- v0 |
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DISM=1.E9 |
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II=0 |
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DO I=1,8 |
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IF(DD(I).LT.DISM) THEN |
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DISM=DD(I) |
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II=I |
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END IF |
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END DO |
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DO I=1,3 |
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V0(I)=VV(II,I) |
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END DO |
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F0X=FX(IVV(II,1),IVV(II,2),IVV(II,3)) |
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F0Y=FY(IVV(II,1),IVV(II,2),IVV(II,3)) |
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F0Z=FZ(IVV(II,1),IVV(II,2),IVV(II,3)) |
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* --- v1 |
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V1(2)=V0(2) |
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V1(3)=V0(3) |
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IF(AV(1).GE.V0(1)) THEN |
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III=IVV(II,1)+1 |
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V1(1)=V0(1)+0.5 |
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ELSE |
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III=IVV(II,1)-1 |
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V1(1)=V0(1)-0.5 |
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END IF |
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F1X=FX(III,IVV(II,2),IVV(II,3)) |
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F1Y=FY(III,IVV(II,2),IVV(II,3)) |
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F1Z=FZ(III,IVV(II,2),IVV(II,3)) |
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* --- v2 |
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V2(1)=V0(1) |
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V2(3)=V0(3) |
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IF(AV(2).GE.V0(2)) THEN |
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III=IVV(II,2)+1 |
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V2(2)=V0(2)+0.5 |
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ELSE |
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III=IVV(II,2)-1 |
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V2(2)=V0(2)-0.5 |
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END IF |
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F2X=FX(IVV(II,1),III,IVV(II,3)) |
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F2Y=FY(IVV(II,1),III,IVV(II,3)) |
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F2Z=FZ(IVV(II,1),III,IVV(II,3)) |
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* --- v3 |
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V3(1)=V0(1) |
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V3(2)=V0(2) |
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IF(AV(3).GE.V0(3)) THEN |
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III=IVV(II,3)+1 |
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V3(3)=V0(3)+2. |
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ELSE |
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III=IVV(II,3)-1 |
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V3(3)=V0(3)-2. |
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END IF |
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F3X=FX(IVV(II,1),IVV(II,2),III) |
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F3Y=FY(IVV(II,1),IVV(II,2),III) |
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F3Z=FZ(IVV(II,1),IVV(II,2),III) |
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* --- linear interpolation, magnetic field calculation |
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CALL FLIN3(V0,V1,V2,V3,F0X,F1X,F2X,F3X,AV,F(1)) |
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CALL FLIN3(V0,V1,V2,V3,F0Y,F1Y,F2Y,F3Y,AV,F(2)) |
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CALL FLIN3(V0,V1,V2,V3,F0Z,F1Z,F2Z,F3Z,AV,F(3)) |
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* --- mirroing |
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IF(V(2).LT.0.) THEN |
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F(1)=-1.*F(1) |
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F(3)=-1.*F(3) |
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END IF |
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IF(V(1).LT.0.) F(1)=-1.*F(1) |
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IF(V(3).LT.0.) F(3)=-1.*F(3) |
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* |
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* Transform coordinates back to MARS |
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* |
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10 CALL GPSPEMA(V) |
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RETURN |
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END |
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