| [2759] | 1 | !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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| 2 | ! |
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| 3 | ! FFTPACK 5.0 |
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| 4 | ! Copyright (C) 1995-2004, Scientific Computing Division, |
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| 5 | ! University Corporation for Atmospheric Research |
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| 6 | ! Licensed under the GNU General Public License (GPL) |
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| 7 | ! |
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| 8 | ! Authors: Paul N. Swarztrauber and Richard A. Valent |
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| 9 | ! |
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| 10 | ! $Id: mradb3.f,v 1.2 2004/06/15 21:29:19 rodney Exp $ |
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| 11 | ! |
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| 12 | !CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC |
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| 13 | |
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| 14 | SUBROUTINE MRADB3 (M,IDO,L1,CC,IM1,IN1,CH,IM2,IN2,WA1,WA2) |
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| 15 | REAL CC(IN1,IDO,3,L1) ,CH(IN2,IDO,L1,3), & |
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| 16 | & WA1(IDO) ,WA2(IDO) |
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| 17 | ! |
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| 18 | M1D = (M-1)*IM1+1 |
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| 19 | M2S = 1-IM2 |
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| 20 | ARG=2.*4.*ATAN(1.0)/3. |
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| 21 | TAUR=COS(ARG) |
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| 22 | TAUI=SIN(ARG) |
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| 23 | DO 101 K=1,L1 |
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| 24 | M2 = M2S |
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| 25 | DO 1001 M1=1,M1D,IM1 |
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| 26 | M2 = M2+IM2 |
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| 27 | CH(M2,1,K,1) = CC(M1,1,1,K)+2.*CC(M1,IDO,2,K) |
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| 28 | CH(M2,1,K,2) = CC(M1,1,1,K)+(2.*TAUR)*CC(M1,IDO,2,K) & |
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| 29 | & -(2.*TAUI)*CC(M1,1,3,K) |
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| 30 | CH(M2,1,K,3) = CC(M1,1,1,K)+(2.*TAUR)*CC(M1,IDO,2,K) & |
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| 31 | & +2.*TAUI*CC(M1,1,3,K) |
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| 32 | 1001 CONTINUE |
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| 33 | 101 END DO |
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| 34 | IF (IDO .EQ. 1) RETURN |
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| 35 | IDP2 = IDO+2 |
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| 36 | DO 103 K=1,L1 |
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| 37 | DO 102 I=3,IDO,2 |
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| 38 | IC = IDP2-I |
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| 39 | M2 = M2S |
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| 40 | DO 1002 M1=1,M1D,IM1 |
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| 41 | M2 = M2+IM2 |
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| 42 | CH(M2,I-1,K,1) = CC(M1,I-1,1,K)+(CC(M1,I-1,3,K)+CC(M1,IC-1,2,K)) |
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| 43 | CH(M2,I,K,1) = CC(M1,I,1,K)+(CC(M1,I,3,K)-CC(M1,IC,2,K)) |
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| 44 | CH(M2,I-1,K,2) = WA1(I-2)* & |
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| 45 | & ((CC(M1,I-1,1,K)+TAUR*(CC(M1,I-1,3,K)+CC(M1,IC-1,2,K)))- & |
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| 46 | & (TAUI*(CC(M1,I,3,K)+CC(M1,IC,2,K)))) & |
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| 47 | & -WA1(I-1)* & |
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| 48 | & ((CC(M1,I,1,K)+TAUR*(CC(M1,I,3,K)-CC(M1,IC,2,K)))+ & |
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| 49 | & (TAUI*(CC(M1,I-1,3,K)-CC(M1,IC-1,2,K)))) |
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| 50 | CH(M2,I,K,2) = WA1(I-2)* & |
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| 51 | & ((CC(M1,I,1,K)+TAUR*(CC(M1,I,3,K)-CC(M1,IC,2,K)))+ & |
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| 52 | & (TAUI*(CC(M1,I-1,3,K)-CC(M1,IC-1,2,K)))) & |
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| 53 | & +WA1(I-1)* & |
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| 54 | & ((CC(M1,I-1,1,K)+TAUR*(CC(M1,I-1,3,K)+CC(M1,IC-1,2,K)))- & |
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| 55 | & (TAUI*(CC(M1,I,3,K)+CC(M1,IC,2,K)))) |
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| 56 | CH(M2,I-1,K,3) = WA2(I-2)* & |
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| 57 | & ((CC(M1,I-1,1,K)+TAUR*(CC(M1,I-1,3,K)+CC(M1,IC-1,2,K)))+ & |
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| 58 | & (TAUI*(CC(M1,I,3,K)+CC(M1,IC,2,K)))) & |
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| 59 | & -WA2(I-1)* & |
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| 60 | & ((CC(M1,I,1,K)+TAUR*(CC(M1,I,3,K)-CC(M1,IC,2,K)))- & |
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| 61 | & (TAUI*(CC(M1,I-1,3,K)-CC(M1,IC-1,2,K)))) |
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| 62 | CH(M2,I,K,3) = WA2(I-2)* & |
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| 63 | & ((CC(M1,I,1,K)+TAUR*(CC(M1,I,3,K)-CC(M1,IC,2,K)))- & |
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| 64 | & (TAUI*(CC(M1,I-1,3,K)-CC(M1,IC-1,2,K)))) & |
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| 65 | & +WA2(I-1)* & |
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| 66 | & ((CC(M1,I-1,1,K)+TAUR*(CC(M1,I-1,3,K)+CC(M1,IC-1,2,K)))+ & |
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| 67 | & (TAUI*(CC(M1,I,3,K)+CC(M1,IC,2,K)))) |
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| 68 | 1002 CONTINUE |
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| 69 | 102 CONTINUE |
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| 70 | 103 END DO |
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| 71 | RETURN |
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| 72 | END |
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