Difficulty Reading Cartesian NetCDF (from Mdv2NetCDF) with Radx2Grid/RadxPrint - LeoCf2RadxFile Error #141
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Hello LROSE Developers,
I am encountering persistent issues when trying to read and convert a specific Cartesian NetCDF file using LROSE tools, specifically Radx2Grid and RadxPrint. My ultimate goal is to convert this Cartesian NetCDF file back to a Cartesian MDV format for use with TITAN.
The NetCDF file in question was originally an MDV file (apparently a gridded volume created by Dsr2Vol) and was then converted to NetCDF using the Mdv2NetCDF LROSE tool.
Environment:
Successful Test Case:
My custom LROSE compilation appears to be generally functional. I can successfully run RadxPrint -h, and tools like RadxConvert and RadxPrint work correctly with example NEXRAD Level II radial data files (e.g., KARX... from lrose-examples), producing the expected CfRadial output/display.
Problem Description:
When I attempt to process my Cartesian NetCDF file (e.g., 170906.nc) with either RadxPrint -f /path/to/170906.nc or Radx2Grid -f /path/to/170906.nc, the tools fail with the following consistent error:
ERROR - LeoCf2RadxFile::_appendSweepInfo
path: /path/to/170906.nc
NetCDF: Not a valid ID
file: /home/f-caballero/lrose_custom_compile/source/lrose-core/codebase/libs/Ncxx/src/Ncxx/NcxxDim.cc line:126
ERROR - LeoCf2RadxFile::readFromPath
Loading sweep info
ERROR - GenericRadxFile::readFromPath
Cannot read path: /path/to/170906.nc
ERROR - running RadxPrint (or Radx2Grid)
This error occurs even with debug = DEBUG_VERBOSE; set in the Radx2Grid.params file. The error suggests that LeoCf2RadxFile (which I understand is primarily for CfRadial/polar data) is being invoked and is expecting sweep-related metadata or structure that does not exist in my Cartesian NetCDF file.
My 170906.nc file is CF-1.6 compliant according to its global attributes and was created by Mdv2NetCDF.
ncdump_170906.txt
Attempts to Use RadxConvert:
I also attempted to use RadxConvert for a direct Cartesian NetCDF to Cartesian MDV conversion. However, after generating the full parameter list (RadxConvert -print_params verbose), I found:
The only MDV-related output_format enum available is OUTPUT_FORMAT_MDV_RADIAL.
Enums like OUTPUT_FORMAT_MDV or OUTPUT_FORMAT_NETCDF_GENERIC_GRID (which I initially hoped to use for an intermediate "cleanup" step) are not listed as valid options for output_format in my compiled version of RadxConvert.
Using the set_output_fields = TRUE; output_fields = { ... }; structure also leads to TDRP errors, as it seems incompatible with OUTPUT_FORMAT_MDV_RADIAL (or invalid output_format enums).
Radx2Grid.params Configuration:
I have configured my Radx2Grid.params file with output_format = MDV; (which is listed as a valid option in the Radx2Grid -print_params output). The grid geometry parameters (grid_xy_geom, grid_z_geom, grid_origin_lat, grid_origin_lon, grid_projection = PROJ_FLAT) have been set to match the metadata of my 170906.nc input file.
Radx2Grid_actual_params.txt
Questions:
Thank you for your time and help.
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