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Christian, Try taking SHOW out of the STNDEX list of parameters to grid in OABSND. I thinking that the error message is related to not finding a guess grid for that. If that isn't the problem, I'll have to set up a test. Steve CHiswell >From: =?ISO-8859-1?Q?Christian_Pag=E9?= <address@hidden> >Organization: UCAR/Unidata >Keywords: 200211151501.gAFF1KL26527 >Hi again, > >I am trying to also use a first guess for 500 hPa geopotential height >barnes analysis, but oabsnd never finds the grid, while gdinfo and >gdlist do list the grid I ask for. > >Here is a summary: > >I run oagrid to create a grid file for 500 hPa hgtd barnes analysis: >$GEMEXE/oagrid << EOF >GDFILE = /io/httpd/gempak/grids/nam_up_t.grid >DELTAN = 0 >DELTAX = 0 >DELTAY = 0 >GRDAREA = #45.30;-73.35;11;14 >EXTEND = 2;2;2;2 >DTAAREA = #45.30;-73.35;11;14 >SOURCE = SN >SNFILE = $GEMUPA/20021115_upa.gem >SFFILE = >SNPARM = hgtd;hght >SFPARM = >DATTIM = 021115/00 >LEVELS = 500 >MAXGRD = 1000 >VCOORD = PRES >run > >exit >EOF > > OBJECTIVE ANALYSIS PARAMETERS > > GRIDAREA 34.30 -87.35 55.30 -60.05 ( 56.30 >-59.35) > DELTAN 4.200 > DELTAX 2.100 > DELTAY 2.100 > > GRID POINTS X : 14 ( 2, 2 ) Y : 11 ( 2, 2 ) > EXTENDAREA 30.10 -91.55 59.50 -55.85 > DATAAREA 34.30 -87.35 56.30 -59.35 > > > CALCULATIONS: > FILE $GEMUPA/20021115_upa.gem > SOURCE SN 34.30 -87.35 56.30 -59.35 >NSTN 23 > PARM HGTD LEVEL 0.0 DATTIM 021115/0000 > > COMPUTED DATA SPACING 2.912 > UNIFORM DATA SPACING 5.486 > RECOMMENDED DELTAN = 4.199 DELTAX = 2.985 DELTAY = 2.099 > >Then I run gdbiint to get the proper model field: > GDFILE Grid file >$GEMMOD/2002111500_cmcreg.gem > GDOUTF Output grid file >/io/httpd/gempak/grids/namumodt.grid > GFUNC Scalar grid hght > GLEVEL Grid level 500 > GVCORD Grid vertical coordinate pres > GDATTIM Grid date/time F000 > GDNUM Grid numbers > >and I get: >Building interpolation array for 14 columns 11 rows > Input grid file contains 565 grids > Interpolating HGHT 021115/0000F000 500 -1 PRES > >So far so good. > >Then gddiag to change hght to hgtd: >GDFILE = /io/httpd/gempak/grids/namumodt.grid >GDOUTF = /io/httpd/gempak/grids/namumodt.grid >GFUNC = QUO(hght,10) >GLEVEL = 500 >GVCORD = pres >GDATTIM = F000 >GRDNAM = hgtd > >with the output: > TIME1 TIME2 LEVL1 LEVL2 VCORD PARM >021115/0000F000 500 PRES HGTD > >Then the oabsnd run: > OABSND PARAMETERS: > > Output grid file: /io/httpd/gempak/grids/nam_up_t.grid > Number of x, y points: 14 11 > Grid bnds: 34.30 -87.35 55.30 -60.05 Grid xtnd: 2 2 >2 2 > Station spacing: 4.20 > Guess grid file: /io/httpd/gempak/grids/namumodt.grid > Guess time: F000 > Sounding file: $GEMUPA/20021115_upa.gem > Data area: 34.30;-87.35;55.30;-60.05 > Level parameters: HGTD > QC threshold: 0.0 > Levels: 500 > Vertical coordinate: PRES > Station parameters: SHOW > Time: 021115/0000 > GAMMA: 0.30 SEARCH: 20.00 NPASS: 2 > Data extrapolation may occur. > > Processing data at time 021115/0000 > [DG -7] Input grid ... cannot be found. > [OA -5] Guess grid could not be found. > SNFILE Sounding data file $GEMUPA/20021115_upa.gem > GDFILE Grid file >/io/httpd/gempak/grids/nam_up_t.grid > SNPARM Sounding parameter list hgtd > STNDEX Stability indices SHOW > LEVELS Vertical levels 500 > VCOORD Vertical coordinate type PRES > DATTIM Date/time 021115/00 > DTAAREA Data area for OA dset > GUESS Guess file*time >/io/httpd/gempak/grids/namumodt.grid*F000 > GAMMA Convergence parameter 0.3 > SEARCH Search radius/Extrapolation 20/EX > NPASS Number of passes 2 > QCNTL Quality control threshold > > >I tried with the full guess time with no difference. > >Here is the gdinfo output: > GDFILE = /io/httpd/gempak/grids/namumodt.grid > LSTALL = YES > OUTPUT = t > GDATTIM = F000 > GLEVEL = 500 > GVCORD = pres > GFUNC = all > GEMPAK-GDINFO>r > > GRID FILE: /io/httpd/gempak/grids/namumodt.grid > > GRID NAVIGATION: > PROJECTION: CED > GRID SIZE: 14 11 > LL CORNER: 34.30 -87.35 > UR CORNER: 55.30 -60.05 > > GRID ANALYSIS BLOCK: > ANALYSIS TYPE: BARNES > DELTAN: 4.200 > DELTAX: 2.100 > DELTAY: 2.100 > GRID AREA: 34.30 -87.35 55.30 -60.05 > EXTEND AREA: 30.10 -91.55 59.50 -55.85 > DATA AREA: 34.30 -87.35 56.30 -59.35 > > Number of grids in file: 2 > > Maximum number of grids in file: 1000 > > NUM TIME1 TIME2 LEVL1 LEVL2 VCORD PARM > 1 021115/0000F000 500 PRES HGHT > 2 021115/0000F000 500 PRES HGTD > Parameters requested: GDFILE,LSTALL,OUTPUT,GDATTIM,GLEVEL,GVCORD,GFUNC. > >So the guess grid is there, but oabsnd doesn't find it. Is there a way >to have more verbose output from oabsnd? >Is there something I miss to have oabsnd fail? > >Christian Pagé >address@hidden >http://meteocentre.com/ http://meteoalerte.com/ > >Etudiant au Doctorat en Sciences de l'environnement UQAM >+1 514 987 3000 ext. 2376 >