[gradsusr] How to write the description file to control multi foreacst grib files?

姜立智 jianglizhi at mail.iap.ac.cn
Sun Aug 9 04:18:25 EDT 2020


Hello, 

I have serval ERA-Interim reanalyses files (contains forecast steps) downloaded from the ECMWF and I want to use one description file to control them. 

The problem is that each file contains serval different base time and serval time steps. How to create one ctl file to descript them properly? I had tried serval times including replace the substitution template %iy2,%ym2, however, it cannot descript multiple files. 

The atttachments are the grib files and ctl files. The outputs are below.




jiang at jiang:/mnt/d/Desktop$ cat erai.10fg.1979.ctl
 dset ^erai.10fg.%y4%m2%d2.grib
 options template yrev
 undef 9.999E+20
 title ^10fg1979.grib
 index ^10fg1979.idx
 dtype grib 255
 xdef 480 linear 0.000000 0.750000
 ydef 241 linear -90.000000 0.75
 tdef         16 linear 03Z01jan1979 3hr
 zdef 1 linear 1 1
 vars 1
no10FGsfc  0 49,1,0  ** surface 10 metre wind gust [m s**-1]
 ENDVARS
jiang at jiang:/mnt/d/Desktop$ gribmap -v -e -i erai.10fg.1979.ctl
gribmap: opening GRIB file erai.10fg.19790101.grib
!!!!! MATCH:      1     231468  255  1     0   49    1 0            103          0  16  btim: 1979010100:00 tau:      3 dtim: 1979010103:00
!!!!! MATCH:      2     462936  255  1     0   49    1 0         231571          0  16  btim: 1979010100:00 tau:      6 dtim: 1979010106:00
!!!!! MATCH:      3     694404  255  1     0   49    1 0         463039          0  16  btim: 1979010100:00 tau:      9 dtim: 1979010109:00
!!!!! MATCH:      4     925872  255  1     0   49    1 0         694507          0  16  btim: 1979010100:00 tau:     12 dtim: 1979010112:00
!!!!! MATCH:      5    1157340  255  1     0   49    1 0         925975          0  16  btim: 1979010112:00 tau:      3 dtim: 1979010115:00
!!!!! MATCH:      6    1388808  255  1     0   49    1 0        1157443          0  16  btim: 1979010112:00 tau:      6 dtim: 1979010118:00
!!!!! MATCH:      7    1620276  255  1     0   49    1 0        1388911          0  16  btim: 1979010112:00 tau:      9 dtim: 1979010121:00
-8-- Time out of file limits:      8    1851744  255  1     0   49    1 0        1620379          0  16  btim: 1979010112:00 tau:     12 dtim: 1979010200:00
gribmap: opening GRIB file erai.10fg.19790102.grib
!!!!! MATCH:      1     231468  255  1     0   49    1 0            103          0  16  btim: 1979010200:00 tau:      3 dtim: 1979010203:00
!!!!! MATCH:      2     462936  255  1     0   49    1 0         231571          0  16  btim: 1979010200:00 tau:      6 dtim: 1979010206:00
!!!!! MATCH:      3     694404  255  1     0   49    1 0         463039          0  16  btim: 1979010200:00 tau:      9 dtim: 1979010209:00
!!!!! MATCH:      4     925872  255  1     0   49    1 0         694507          0  16  btim: 1979010200:00 tau:     12 dtim: 1979010212:00
!!!!! MATCH:      5    1157340  255  1     0   49    1 0         925975          0  16  btim: 1979010212:00 tau:      3 dtim: 1979010215:00
!!!!! MATCH:      6    1388808  255  1     0   49    1 0        1157443          0  16  btim: 1979010212:00 tau:      6 dtim: 1979010218:00
!!!!! MATCH:      7    1620276  255  1     0   49    1 0        1388911          0  16  btim: 1979010212:00 tau:      9 dtim: 1979010221:00
-16-- Time out of file limits:      8    1851744  255  1     0   49    1 0        1620379          0  16  btim: 1979010212:00 tau:     12 dtim: 1979010300:00
gribmap: opening GRIB file erai.10fg.19790103.grib
gribmap: Warning! could not open GRIB file erai.10fg.19790103.grib
gribmap: reached end of files
gribmap: writing the GRIB1 index file (version 5)
jiang at jiang:/mnt/d/Desktop$
jiang at jiang:/mnt/d/Desktop$
jiang at jiang:/mnt/d/Desktop$ cat erai.10fg.i1979.ctl
 dset ^erai.10fg.%iy4%im2%id2.grib
 options template yrev
 undef 9.999E+20
 title ^10fg1979.grib
 index ^10fg1979.idx
 dtype grib 255
 xdef 480 linear 0.000000 0.750000
 ydef 241 linear -90.000000 0.75
 tdef         16 linear 03Z01jan1979 3hr
 zdef 1 linear 1 1
 vars 1
no10FGsfc  0 49,1,0  ** surface 10 metre wind gust [m s**-1]
 ENDVARS
jiang at jiang:/mnt/d/Desktop$ gribmap -v -e -i erai.10fg.i1979.ctl
gribmap: opening GRIB file erai.10fg.19790101.grib
!!!!! MATCH:      1     231468  255  1     0   49    1 0            103          0  16  btim: 1979010100:00 tau:      3 dtim: 1979010103:00
!!!!! MATCH:      2     462936  255  1     0   49    1 0         231571          0  16  btim: 1979010100:00 tau:      6 dtim: 1979010106:00
!!!!! MATCH:      3     694404  255  1     0   49    1 0         463039          0  16  btim: 1979010100:00 tau:      9 dtim: 1979010109:00
!!!!! MATCH:      4     925872  255  1     0   49    1 0         694507          0  16  btim: 1979010100:00 tau:     12 dtim: 1979010112:00
!!!!! MATCH:      5    1157340  255  1     0   49    1 0         925975          0  16  btim: 1979010112:00 tau:      3 dtim: 1979010115:00
!!!!! MATCH:      6    1388808  255  1     0   49    1 0        1157443          0  16  btim: 1979010112:00 tau:      6 dtim: 1979010118:00
!!!!! MATCH:      7    1620276  255  1     0   49    1 0        1388911          0  16  btim: 1979010112:00 tau:      9 dtim: 1979010121:00
!!!!! MATCH:      8    1851744  255  1     0   49    1 0        1620379          0  16  btim: 1979010112:00 tau:     12 dtim: 1979010200:00
gribmap: reached end of files
gribmap: writing the GRIB1 index file (version 5)
jiang at jiang:/mnt/d/Desktop$








Can anyone gives some advice? Thanks in advance.



Sincerely,

Lizhi Jiang

August 9, 2020
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