Description
This is a collection of tools to inspect the CloudCoeff.bin binary files containing the CRTM cloud scattering LUTs. Single-scattering properties for the following particle types in the CRTM can be retrieved in the IR and MW:
rainicesnowgraupelhail
Numerical values are saved in ASCII format and python scripts are provided to reconstruct the phase function from the retrieved Legendre expansion coefficients..
Getting Started
Requirements
This tool requires a linked version of the CRTM library. The code has been tested with CRTM REL-2.1.3 to 2.3.0. A Python installation with NumPy and Matplotlib modules is required for the plotting scripts.
Compiling the Code
- Set the environmental variable
FCCto your Fortran compiler of choice. - Run
makein the./buildfolder.
Using the Code
Preliminaries
- If you are using the code, please cite the corresponding paper by Stegmann et al., (2018) in any publication (journal paper, presentation, poster,...) where you are using the code's results.
- If you plan to develop or modify the code, please create a
featurebranch fromdevelopor fork the repository.
Running the Code
To run the program extracting the scattering properties, place the CloudCoeff.bin under scrutiny in the INSPECT_CloudCoeff/fix folder as a first step.
Subsequently execute the ASCII extraction program in the /bin folder by running the executable ./InspectCloudCoeff.x and follow the instructions on the screen.
To reconstruct either the MW or IR phase functions, execute either one of the plot_legendre_*.py Python scripts in the /scripts folder and enter the number of streams for the Legendre expansion.
LICENSE:
Please see the file LICENSE.txt for details.
References
Stegmann, P. G., G. Tang, P. Yang, B. T. Johnson (2018): "A stochastic model for density-dependent microwave Snow- and Graupel scattering coefficients of the NOAA JCSDA community radiative transfer model.", J. Quant. Spec. Rad. Trans. 211, 9-24.