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Re: grib

Patrick,

The CONDUIT data is not modified from what is on the NWS data servers.
The GRIB products are sent as individual products rather than a single
file, but nothing is modified internal to he CONDUIT adta contents.
If you want to compare the contents of the 0.5 degree CONDUIT
data to NCEP files, simply FILE the data from the LDM, rather than
decoding it, and then re-converting back to grib.

Steve Chiswell
Unidata User Support


On Fri, 2006-04-28 at 11:49, Patrick L. Francis wrote:
> gembuds... prolly for chiz...
> 
> the 0.5deg gfs conduit feeds
> seem to be missing .5 deg of
> data as compared to the raw
> files downloaded via ncep... is
> there any way around this?
> 
> i.e. note the error (s) when using
> standard gdgrib2 then degrib
> 
> [ldm@beast bin]$ ./degrib -in chizgrib_F003.pgrb2 -P -Interp 2 -Separator 
> \",\" -Unit m -pntStyle 0 -pntFile places.txt  -out chiz.txt
> ERROR: In call to GRIB2Probe.
> ERROR: Sect3 was not Valid.
> Projection code requires Dx (0.000000) > 0 and Dy (0.500000) > 0
> ERROR: In call to GRIB2Probe.
> (null)
> [ldm@beast bin]$
> 
> PDS-S0 | DataType | 0 (Meteorological products)
> PDS-S1 | Originating center | 7 (US-NCEP)
> PDS-S1 | Originating sub-center | 255
> PDS-S1 | GRIB Master Tables Version | 2
> PDS-S1 | GRIB Local Tables Version | 1
> PDS-S1 | Significance of reference time | 1 (Start of Forecast)
> PDS-S1 | Reference Time | 04/27/2006 18:00:00 UTC
> PDS-S1 | Operational Status | 0 (Operational products)
> PDS-S1 | Type of Data | 1 (Forecast products)
> PDS-S4 | Product type | 0 (Analysis at a horizontal layer at a point in 
> time)
> PDS-S4 | Category Description | 0 (Temperature)
> PDS-S4 | Category Sub-Description | 0 (Temperature [K])
> PDS-S4 | Output grid, (COMPUTED) english unit is | [F]
> PDS-S4 | Generation process | 255 (Missing)
> PDS-S4 | Forecast time in hours | 3.000000
> PDS-S4 | Type of first fixed surface | 102 (Specific altitude above mean sea 
> level [m])
> PDS-S4 | Value of first fixed surface | 2.000000
> GDS | Number of Points | 259920
> GDS | Projection Type | 0 (Latitude/Longitude)
> GDS | Shape of Earth | sphere
> GDS | Radius | 6371.200000 (km)
> GDS | Nx (Number of points on parallel) | 720
> GDS | Ny (Number of points on meridian) | 361
> GDS | Lat1 | -90.000000
> GDS | Lon1 | 0.000000
> GDS | u/v vectors relative to | easterly/northerly
> GDS | Lat2 | 90.000000
> GDS | Lon2 | 0.000000
> GDS | Dx | 0.000000 (degrees)
> GDS | Dy | 0.500000 (degrees)
> GDS | Input GRIB2 grid, scan mode | 64 (0100)
> GDS | Output grid, scan mode | 64 (0100)
> GDS | (.flt file grid), scan mode | 0 (0000)
> GDS | Output grid, scan i/x direction | positive
> GDS | Output grid, scan j/y direction | positive
> GDS | (.flt file grid), scan j/y direction | negative
> GDS | Output grid, consecutive points in | i/x direction
> GDS | Output grid, adjacent rows scan in | same direction
> Info | Packing that was used | 0 (Grid point data - simple packing)
> Info | Original field type | 0 (Floating point)
> Info | Missing value management | 1 (Primary missing value included with 
> data)
> Info | Primary missing value | 9999.000000
> Info | Detected number of Missing | 1440
> Info | Field minimum value | -72.670000
> Info | Field maximum value | 105.530000
> 
> ------------------------------
> Patrick L. Francis
> Department of Geography
> Bowling Green State University
> Bowling Green, OH 43403
> Phone: 419.372.4185
> web: http://weather.bgsu.edu/
> -----------------------------
> 
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