pycwr (Python China Weather Radar tools library)

Documents

The documentation will be built on readthedocs and is available at the pycwr documents website.

Install pycwr Library

The easiest route to installing pycwr is through pip and conda:

if you haven't install cartopy, for all platforms installing cartopy can be done with:

conda install -c conda-forge cartopy

and you can install pycwr with pip:

pip install pycwr

Also, you can install from source code:

git clone https://github.com/YvZheng/pycwr.git
cd pycwr
python setup.py install

Read Radar Basedata to PRD (Polarimetry Radar Data) class or Py-ART Radar class

from pycwr.io import read_auto
file = r"./Z_RADR_I_Z9898_20190828192401_O_DOR_SAD_CAP_FMT.bin.bz2"
PRD = read_auto(file)
PyartRadar = PRD.ToPyartRadar()

The data structure of the PRD is as follows:

Plotting PPI with map

import matplotlib.pyplot as plt
import cartopy.crs as ccrs
from pycwr.draw.RadarPlot import Graph, GraphMap
ax = plt.axes(projection=ccrs.PlateCarree())
graph = GraphMap(PRD, ccrs.PlateCarree())
graph.plot_ppi_map(ax, 0, "dBZ", cmap="pyart_NWSRef")
ax.set_title("example of PPI with map", fontsize=16)
plt.show()

Plotting PPI

fig, ax = plt.subplots()
graph = Graph(PRD)
graph.plot_ppi(ax, 0, "dBZ", cmap="pyart_NWSRef")
graph.add_rings(ax, [0, 50, 100, 150, 200, 250, 300])
ax.set_title("example of PPI", fontsize=16)
ax.set_xlabel("Distance From Radar In East (km)", fontsize=14)
ax.set_ylabel("Distance From Radar In North (km)", fontsize=14)

Plotting VCS with lat lon position

fig, ax = plt.subplots()
graph = GraphMap(PRD, ccrs.PlateCarree())
graph.plot_vcs_map(ax, (120.8, 27.8), (122.9, 26.8), "dBZ", cmap="pyart_NWSRef")
ax.set_ylim([0,15])
ax.set_ylabel("Height (km)", fontsize=14)
ax.set_xlabel("Latitude, Longitude", fontsize=14)
ax.set_title("VCS exmaple", fontsize=16)
plt.show()

Plotting VCS with x y position

fig, ax = plt.subplots()
graph = Graph(PRD)
graph.plot_vcs(ax, (0,0), (150, 0), "dBZ", cmap="pyart_NWSRef")
ax.set_ylim([0,15])
ax.set_ylabel("Height (km)", fontsize=14)
ax.set_xlabel("Distance From Section Start (Uints:km)", fontsize=14)
ax.set_title("VCS exmaple", fontsize=16)
plt.show()

Launch Graphical interface to show Radar Data

 python scripts/LaunchGUI.py

The main window opens as shown below:

more example via: exmaple

6111111/pycwr