Hi Bill:
An "Unknown" param name is always due to us not having that parameter in our
external grib tables.
Anyone seeing this problem can send us a sample file, which will help us track
it down.
thanks.
Bill Moninger wrote:
> I'm using netCDF4-java to read grib1 files.
>
> In one case, a typical RUC file has temperature data in the form VPT
> (virtual potential temperature). wgrib can read the file fine, and gives
> record indicators like this.
>
> 101:29361886:d=09021719:VPTMP:kpds5=189:kpds6=109:kpds7=1:TR=0:P1=9:P2=0:TimeU=1:hybrid
> lev 1:9hr fcst:NAve=0
>
> However, netcdf4-java fails, giving the variable name as 'Unknown', and
> apparently filling all the variables with 0.
>
> Here's some relevant output from ncfile.toString():
>
> float Unknown(time=1, hybrid=50, y=337, x=451);
> :units = "Unknown";
> :long_name = "Unknown @ hybrid";
> :missing_value = -9999.0f; // float
> :grid_mapping = "Lambert_Conformal";
> :GRIB_param_name = "Unknown";
> :GRIB_center_id = 59; // int
> :GRIB_table_id = 2; // int
> :GRIB_param_number = 189; // int
> :GRIB_param_id = 1, 59, 2, 189; // int
> :GRIB_product_definition_type = "Forecast/Uninitialized
> Analysis/Image Product";
> :GRIB_level_type = 109; // int
>
> Any thoughts on how to solve this problem?
>
> -Bill
