Python tools for polarimetric radar retrievals.
This codebase was developed at Colorado State University by numerous people, including Brenda Dolan, Brody Fuchs, Kyle Wiens, Rob Cifelli, Larry Carey, Timothy Lang, and others.
Currently, fuzzy-logic-based hydrometeor identification, blended rainfall, DSD retrievals, and liquid/ice mass calculations are supported. There is also an algorithm that uses a finite impulse response (FIR) filter to process differential phase and calculate specific differential phase. Finally, there are some tools to do rudimentary QC on the data.
These are supplied as standalone functions that take polarimetric radar data
as arguments. Scalars and arrays are supported as function inputs. The main exception
is csu_kdp.calc_kdp_bringi() which requires individual rays, sweeps, or volumes of
radar data.
To install:
python setup.py install
(you may need to have sudo privileges, depending on your setup)
There is a parameter in the setup.py file called USE_CYTHON. By default it is set to True.
This will cause the program to compile using Cython to speed up the KDP other routines.
This enables the widest cross-platform support. However, if you are able to compile programs
using f2py, you may want to try USE_CYTHON = False in setup.py. This will provide a modest
performance improvement. Under Windows, f2py will be difficult to get working, but we've been
successful using it under Mac and Linux.
Note: If you have previously installed csu_radartools you may have to completely remove it
from its installation location to get the latest version to work right, since the KDP
routines have been substantially altered.
To access, use the following in your analysis code:
from csu_radartools import (csu_fhc, csu_liquid_ice_mass, csu_blended_rain, csu_dsd,
csu_kdp, csu_misc, fundamentals)
For help information do help on individual modules. There is also a demonstration IPython notebook in the notebooks directory that covers all the modules.
CSU_RadarTools is known to work under Python 2.7 and 3.4. Other Python versions are untested.