SUBROUTINE RADF2 (IDO,L1,CC,CH,WA1)
      IMPLICIT DOUBLE PRECISION (A-H, O-Z)
      DIMENSION       CH(IDO,2,L1)           ,CC(IDO,L1,2)           ,
     1                WA1(1)
      DO 101 K=1,L1
         CH(1,1,K) = CC(1,K,1)+CC(1,K,2)
         CH(IDO,2,K) = CC(1,K,1)-CC(1,K,2)
  101 CONTINUE
      IF (IDO-2) 107,105,102
  102 IDP2 = IDO+2
      DO 104 K=1,L1
         DO 103 I=3,IDO,2
            IC = IDP2-I
            TR2 = WA1(I-2)*CC(I-1,K,2)+WA1(I-1)*CC(I,K,2)
            TI2 = WA1(I-2)*CC(I,K,2)-WA1(I-1)*CC(I-1,K,2)
            CH(I,1,K) = CC(I,K,1)+TI2
            CH(IC,2,K) = TI2-CC(I,K,1)
            CH(I-1,1,K) = CC(I-1,K,1)+TR2
            CH(IC-1,2,K) = CC(I-1,K,1)-TR2
  103    CONTINUE
  104 CONTINUE
      IF (MOD(IDO,2) .EQ. 1) RETURN
  105 DO 106 K=1,L1
         CH(1,2,K) = -CC(IDO,K,2)
         CH(IDO,1,K) = CC(IDO,K,1)
  106 CONTINUE
  107 RETURN
      END