porter-ng

A simple data conversion tool which converts GrADS binary data to GRIB 2 data.

It is currently tested on numerical weather prediction model's output data produced by NWPC (Numerical Weather Prediction Center of CMA).

Requirements

• ecCodes

  porter-ng uses ecCodes by ECMWF to encode GRIB 2 data. So please build and install ecCodes before building porter-ng.

• Boost C++ libraries

  porter-ng uses some libraries of Boost C++ libraries to parse GrADS data description file and command line arguments:

  • system
  • file system
  • data time

• yaml-cpp

  porter-ng's config file is written in YAML. And yaml-cpp is used to parse YAML file.

• muParser

  porter-ng uses muParser to parse value expressions in config file.

Installation

Use CMake to build from source code.

Some Cmake variables are available to help find required libraries. Such as:

• ECCODES_INSTALL_PREFIX: ecCodes's install prefix, default is /usr/local.
• YAMLCPP_INSTALL_PREFIX: yaml-cpp's install prefix, default is /usr/local.
• MUPARSER_INSTALL_PREFIX: muParser's install prefix, default is /usr/local.

Getting Started

Use command line tool porter to convert GrADS data to GRIB 2.

porter --config=config.yaml \
    --output=output.grib2 \
    data.ctl

A simple config file:

params:
  -
    name: t
    keys:
      # param
      discipline: 0
      parameterCategory: 0
      parameterNumber: 0

      # level
      typeOfLevel: isobaricInPa
    value: x + 273.15

  -
    name: u
    levels: [1000, 962.5]
    keys:
      # param
      discipline: 0
      parameterCategory: 2
      parameterNumber: 2

      # level
      typeOfLevel: isobaricInPa

License

Copyright © 2018-2019, Perilla Roc.

This project is licensed under the MIT License.