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ADAS Subroutine dnsort

       SUBROUTINE DNSORT(XA,YA,N)
       IMPLICIT REAL*8(A-H,O-Z)
C-----------------------------------------------------------------------
C  PURPOSE: TO SORT AN ARRAY SO THAT FIRST INPUT IS IN INCREASING ORDER
C
C  N.B.  INPUT VALUES ARE ALTERED BY THIS ROUTINE !!!!
C
C  INPUT
C      XA(I)=X-VALUES
C      YA(I)=Y-VALUES
C      N=NUMBER OF VALUES
C  OUTPUT
C      XA(I)=SORTED X-VALUES
C      YA(I)=SORTED Y-VALUES
C
C
C  *********                                             **************
C UNIX-IDL PORT:
C
C VERSION: 1.1                          DATE: 07-11-96
C MODIFIED: WILLIAM OSBORN (TESSELLA SUPPORT SERVICES PLC)
C               - PUT UNDER S.C.C.S. CONTROL
C
C VERSION: 1.2                          DATE: 15-05-07
C MODIFIED: Allan Whiteford
C               - Updated comments as part of subroutine
C                 documentation production.
C
C-----------------------------------------------------------------------
      INTEGER             N
      REAL*8              XA(10),      YA(10)
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