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			24 lines
		
	
	
		
			453 B
		
	
	
	
		
			FortranFixed
		
	
	
	
	
	
		
		
			
		
	
	
			24 lines
		
	
	
		
			453 B
		
	
	
	
		
			FortranFixed
		
	
	
	
	
	
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								      subroutine flat2(ss,n,nsum)
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								      real ss(1024)
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								      real ref(1024)
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								      real tmp(1024)
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								      nsmo=20
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								      base=50*(float(nsum)**1.5)
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								      ia=nsmo+1
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								      ib=n-nsmo-1
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								      do i=ia,ib
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								         call pctile(ss(i-nsmo),tmp,2*nsmo+1,50,ref(i))
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								      enddo
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								      call pctile(ref(ia),tmp,ib-ia+1,50,base2)
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								      if(base2.gt.0.1*base) then
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								         do i=ia,ib
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								            ss(i)=base*ss(i)/ref(i)
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								         enddo
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								      endif
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								      return
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								      end
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