;+
;
; .. _interp_erai_ws_1989_2009.pro:
;
; ============================
; interp_erai_ws_1989_2009.pro
; ============================
;
;     .. graphviz::
;
;        digraph interp_erai_ws_1989_2009 {
;           graph [
;           rankdir="LR",
;           ]
;           file_u10 [shape=ellipse,fontname=Courier,label="/Volumes/PRAVEEN/ERAI_global/20c3m_erai_u10_TROP_1989_2009.nc"];
;           file_v10 [shape=ellipse,fontname=Courier,label="/Volumes/PRAVEEN/ERAI_global/20c3m_erai_v10_TROP_1989_2009.nc"];
;
;           mask [shape=ellipse,fontname=Courier,label="${PROJECT_ID}/mask_oaflux_30N30S.nc"];
;
;           ncfile [shape=ellipse,fontname=Courier,label="/Volumes/PRAVEEN/TropFlux/input_uncor/erai_ws_19890101_20091231_oafluxgrid.nc"];
;
;           interp_erai_ws_1989_2009 [shape=box,
;           fontname=Courier,
;           color=blue,
;           URL="http://forge.ipsl.jussieu.fr/tropflux/browser/trunk/src/interp_erai_ws_1989_2009.pro",
;           label="${PROJECT}/src/interp_erai_ws_1989_2009.pro"];
;
;           {file_u10 file_v10 mask} -> {interp_erai_ws_1989_2009} -> {ncfile}
;
;        }
;
; SEE ALSO
; ========
;
; :ref:`project_profile.sh`
;
; :func:`report <saxo:report>`
; :func:`isadirectory <saxo:isadirectory>`
; :func:`isafile <saxo:isafile>`
; :func:`initncdf <saxo:initncdf>`
; :func:`read_ncdf <saxo:read_ncdf>`
; :func:`domdef <saxo:domdef>`
; :func:`call_interp2d <saxo:call_interp2d>`
; :func:`ncdf_quickwrite <saxo:ncdf_quickwrite>`
;
; EXAMPLES
; ========
;
; ::
;
;  IDL> interp_erai_ws_1989_2009
;
;
; TODO
; ====
;
; hard coded directory - usage of ${PROJECT_ID}
;
; coding rules
;
; KNOWN ISSUES
; ============
;
; test of existence of fullfilename_msk not very efficient because
; MUST_EXIST keyword of :func:`isafile <saxo:isafile>` not yet implemented
;
; EVOLUTIONS
; ==========
;
; - fplod 20101217T140745Z aedon.locean-ipsl.upmc.fr (Darwin)
;
;   * remove hard coded directory for mask_oaflux_30N30S.nc
;
; - fplod 20101215T112657Z aedon.locean-ipsl.upmc.fr (Darwin)
;
;   * add graph in header
;
; - fplod 20101214T093615Z aedon.locean-ipsl.upmc.fr (Darwin)
;
;   * minimal header
;
; - pbk 2008
;
;   * creation
;
;-
pro interp_erai_ws_1989_2009
@common
@cm_project
;
; check for input directory
;
; test if ${PROJECT_ID} defined
CASE project_id_env OF
    ''  :  BEGIN
     msg = 'eee : ${PROJECT_ID} is not defined'
     ras = report(msg)
     STOP
           END
 ELSE: BEGIN
     msg = 'iii : ${PROJECT_ID} is ' + project_id_env
     ras = report(msg)
       END
ENDCASE
;
iodirin = isadirectory(project_id_env)
;
; existence and protection of ${PROJECT_ID}
IF (FILE_TEST(iodirin, /DIRECTORY, /EXECUTABLE, /READ) EQ 0) THEN BEGIN
   msg = 'eee : the directory' + iodirin  + ' is not accessible.'
   ras = report(msg)
   STOP
ENDIF
;
; build mask filename
filename_msk='mask_oaflux_30N30S.nc'
;
; check if this file exists
fullfilename_msk = isafile(iodirin + filename_msk, NEW=0, /MUST_EXIST)
IF fullfilename_msk[0] EQ '' THEN BEGIN
   msg = 'eee : the file ' + fullfilename_msk + ' was not found.'
   ras = report(msg)
   STOP
ENDIF

st=19880101 & en=20100930

filein='/Volumes/PRAVEEN/ERAI_global/20c3m_erai_u10_TROP_1989_2009.nc'
initncdf, filein
u10in=read_ncdf("u10",st, en,file=filein,/nostr)

filein='/Volumes/PRAVEEN/ERAI_global/20c3m_erai_v10_TROP_1989_2009.nc'
initncdf, filein
v10in=read_ncdf("v10",st, en,file=filein,/nostr)

initncdf, filein
domdef
latin=reform(gphit(0,*)) & lonin=reform(glamt(*,0))
print, 'lat grid ',min(latin),max(latin),latin(1)-latin(0)
print, 'lon grid ',min(lonin),max(lonin),lonin(1)-lonin(0)

timein=time & jptin=jpt
tab=u10in(*,*,0)
mskin=glamt*0.+1.

initncdf, fullfilename_msk
domdef
latout=reform(gphit(0,*)) & lonout=reform(glamt(*,0))
print, 'lat grid ',min(latout),max(latout),latout(1)-latout(0)
print, 'lon grid ',min(lonout),max(lonout),lonout(1)-lonout(0)
mskout=read_ncdf("msk", file=fullfilename_msk,/nostr)

help, u10in, v10in,lonin,latin,mskin,lonout,latout,mskout

si=size(u10in)
u10out=fltarr(jpi,jpj,jptin)
v10out=fltarr(jpi,jpj,jptin)

for jt=0,jptin-1 do begin
  print, 'Interpolation jt=',jt,' / ',jptin-1
  tab=reform(u10in(*,*,jt))
  u10out(*,*,jt)=call_interp2d(tab,lonin,latin,mskin,lonout,latout,method='bilinear')
  u10out(*,*,jt)=u10out(*,*,jt)*mskout+(1.-mskout)*1.e20

  tab=reform(v10in(*,*,jt))
  v10out(*,*,jt)=call_interp2d(tab,lonin,latin,mskin,lonout,latout,method='bilinear')
  v10out(*,*,jt)=v10out(*,*,jt)*mskout+(1.-mskout)*1.e20

endfor

time=timegen(7670, units='days', start=julday(1,1,1989)) & jpt=n_elements(time)
tt=time & jptin=jpt
cda0=string(jul2date(tt(0)),format='(i8.8)')
cda1=string(jul2date(tt(jpt-1)),format='(i8.8)')
tt=tt-julday(1,1,1950,00,00,00)
xlon=reform(glamt(*,0) ) & ylat=reform(gphit(0,*))

initncdf, fullfilename_msk
valmask=1.e20

ylat=latout
xlon=lonout
ncfile='!/Volumes/PRAVEEN/TropFlux/input_uncor/erai_ws_19890101_20091231_oafluxgrid.nc'

lon_attr={units:'degrees_east',long_name:'Longitude'}
lat_attr={units:'degrees_north',long_name:'Latitude'}
time_attr={units:'days since 1950-01-01 00:00:00',long_name:'Time axis',time_origin:' 1950-JAN-01 00:00:00'}

u10_attr={units:'m/s',missing_value:valmask,long_name:'10 metre u wind component',short_name:'u10',axis:'TYX'}
v10_attr={units:'m/s',missing_value:valmask,long_name:'10 metre v wind component',short_name:'v10',axis:'TYX'}
time_attr={units:'days since 1950-01-01 00:00:00',long_name:'Time axis',time_origin:' 1950-JAN-01 00:00:00'}
globattr={source:'Tropical ocean winds obtained from ERA Interim',timerange:cda0+' - '+cda1}

help, u10out,v10out,tt,xlon,ylat

ncfields = 'u10[longitude,latitude,time]=u10out:u10_attr; ' $
          +'v10[longitude,latitude,time]=v10out:v10_attr; ' $
                      + 'longitude[]=xlon:lon_attr; ' $
                      + 'latitude[]=ylat:lat_attr; ' $
                      + 'tt[*time]=tt:time_attr ' $
                      + ' @ globattr'

@ncdf_quickwrite

return
end