ADAS Subroutine r8fun1

      FUNCTION R8FUN1 ( Z )
C-----------------------------------------------------------------------
C
C  **************** FORTRAN77 REAL*8 FUNCTION: R8FUN1 ******************
C
C  PURPOSE: Returns argument
C
C  CALLING PROGRAM: GENERAL USE
C
C  FUNCTION:
C          (R*8)  R8FUN1  = FUNCTION NAME
C          (R*8)  Z       = INPUT VALUE
C
C AUTHOR:   PAUL E. BRIDEN (TESSELLA SUPPORT SERVICES PLC)
C           K1/0/81
C           JET EXT. 4569
C
C DATE:     13/08/90
C
C VERSION  : 1.2                          
C DATE     : 20-12-2001
C MODIFIED : Martin O'Mullane
C               - Removed mainframe listing information beyond column 72.
C
C VERSION  : 1.3                          
C DATE     : 10-04-2007
C MODIFIED : Allan Whiteford
C               - Modified documentation as part of automated
C		  subroutine documentation preparation.
C
C-----------------------------------------------------------------------
      REAL*8              Z