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;  Program Name: change_qpe.ncl                                               ;
;                                                                             ;
;  National Water Model (NWM) WRF-hydro forcing engine is developed by        ;
;  National Center for Atmospheric Research (NCAR), under the sponsorship     ;
;  of National Water Center (NWC).                                            ;
;                                                                             ;
;   Team Members:                                                             ;
;     NCAR Staff: Linlin Pan, Wei Yu, and David Gochis                        ;
;      NWC/OWP Staff: Brian Cosgrove, Zhengtao Cui, Cham Pham, and James Taft ;
;                                                                             ;
;  This is a ncl program to perform regridding for the long range forcing.    ;
;                                                                             ;
;  Input: hrrr file, rainfall file                                            ;
;                                                                             ;
;  Output: hrrr file with revised rainfall                                    ;
;                                                                             ;
; For non-fatal errors output is witten to $DATA/logs                         ;
;                                                                             ;
; Author(s)/Contact(s): Linlin Pan, lpan@ucar.edu                             ;
; Origination                                                  Sept., 2015    ;
;                                                                             ;
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;
begin
      print("Start to replace the precipitation for analysis.")
           hrrrFile = getenv("hrrrFile") ; HRRR data
           rainFile = getenv("rainFile") ; rain data
     
           f2 = addfile(hrrrFile + ".nc","w") 
           f1 = addfile(rainFile,"r") 


;           dd = dimsizes(f1->precip_rate)
;            print("dd="+dd)
;           dimlat = dd(0)
;           dimlon = dd(1)

        ndim=dimsizes(dimsizes(f1->precip_rate))
        if(ndim.eq.2)then
          precip_rate = f1->precip_rate(:,:)
        else
          precip_rate = f1->precip_rate(0,:,:)
        end if

	  printVarSummary(precip_rate) 
	  printVarSummary(f2->RAINRATE) 
;           f2->RAINRATE = (/precip_rate(:,:)/)
           f2->RAINRATE(0,:,:) = (/precip_rate/)
;           f2->RAINRATE@units="mm s-1"
;           f2->RAINRATE@long_name="Surface Precipitation Rate"

      print("End to replace the precipitation for analysis.")
exit
end
status_exit(1)