Grib2 satellite data

From: Axel Seifert <Axel.Seifert_at_nyahnyahspammersnyahnyah>
Date: Fri, 25 Sep 2009 13:29:36 +0200

Dear all,

I have a GRIB2 file with MSG data which I would like to read with NCL.
Unfortunately, I get the following error from ncl_filedump:

getpdstemplate: PDS Template 4.31 not defined.
warning:Error unpacking GRIB record section 4.
fatal:Could not open (MET9_IR108_cosmode_0909210000.grib2)

The NCEP web page

http://www.nco.ncep.noaa.gov/pmb/docs/grib2/grib2_doc.shtml

does not seem to list a PDS 31 template, so I guess the problem is that
the NCEP API does not support this template?

The ECMWF Grib API can read the file, e.g., the PDS looks like

Product Definition Section (PDS):

Template Number: 31
Template:
Satellite Product.
  1 0 Parameter category (see Code Table 4.1)
  2 2 Parameter number (see Code Table 4.2)
  3 8 Type of generating process (see Code Table 4.3)
                [ Code Table 4.3: 8 = Observation ]
  4 0 Observation generating process identifier (def. by orig. centre)
  5 1 Number of contributing spectral bands (NB)
  6 333 Satellite series of band nb (code table def. by orig./generating centre)
  7 72 Satellite numbers of band nb (code table def. by orig./generating centre)
  8 207 Instrument types of band nb (code table def. by orig./generating centre)
  9 0 Scale factor of central wave number of band nb
 10 92592 Scaled value of central wave number of band nb (units: m-1)

Any comments or help are appreciated.

Best regards, Axel

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Received on Fri Sep 25 2009 - 05:29:36 MDT

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