.. only:: html

    .. note::
        :class: sphx-glr-download-link-note

        Click :ref:`here <sphx_glr_download_source_auto_examples_sydney_tornado.py>`     to download the full example code
    .. rst-class:: sphx-glr-example-title

    .. _sphx_glr_source_auto_examples_sydney_tornado.py:


Example of a wind retrieval in a tornado over Sydney
----------------------------------------------------

This shows an example of how to retrieve winds from 4 radars over Sydney.

Grided netCDF files are downloadable from:
https://drive.google.com/drive/u/1/folders/1pcQxWRJV78xuJePTZnlXPPpMe1qut0ie

.. image:: ../../sydney_tornado.png


.. code-block:: default


    import pyart
    import pydda
    import matplotlib.pyplot as plt
    import numpy as np

    grid1 = pyart.io.read_grid('grid1_sydney.nc')
    grid2 = pyart.io.read_grid('grid2_sydney.nc')
    grid3 = pyart.io.read_grid('grid3_sydney.nc')
    grid4 = pyart.io.read_grid('grid4_sydney.nc')

    # Set initialization and do retrieval
    u_init, v_init, w_init = pydda.initialization.make_constant_wind_field(grid1, vel_field='VRADH_corr')
    new_grids = pydda.retrieval.get_dd_wind_field([grid1, grid2, grid3, grid4],
                                                  u_init, v_init, w_init,
                                                  vel_name='VRADH_corr', refl_field='DBZH',
                                                  mask_outside_opt=True)
    # Make a neat plot
    fig = plt.figure(figsize=(10,7))
    ax = pydda.vis.plot_horiz_xsection_quiver_map(new_grids, background_field='DBZH', level=3,
                                                  show_lobes=False, bg_grid_no=3, vmin=0, vmax=60,
                                                  quiverkey_len=40.0,
                                                  quiver_spacing_x_km=2.0, quiver_spacing_y_km=2.0,
                                                  quiverkey_loc='top', colorbar_contour_flag=True,
                                                  cmap='pyart_HomeyerRainbow')
    ax.set_xticks(np.arange(150.5, 153, 0.1))
    ax.set_yticks(np.arange(-36, -32.0, 0.1))
    ax.set_xlim([151.0, 151.35])
    ax.set_ylim([-34.15, -33.9])
    plt.show(ax)


.. rst-class:: sphx-glr-timing

   **Total running time of the script:** ( 0 minutes  0.000 seconds)


.. _sphx_glr_download_source_auto_examples_sydney_tornado.py:


.. only :: html

 .. container:: sphx-glr-footer
    :class: sphx-glr-footer-example



  .. container:: sphx-glr-download sphx-glr-download-python

     :download:`Download Python source code: sydney_tornado.py <sydney_tornado.py>`



  .. container:: sphx-glr-download sphx-glr-download-jupyter

     :download:`Download Jupyter notebook: sydney_tornado.ipynb <sydney_tornado.ipynb>`


.. only:: html

 .. rst-class:: sphx-glr-signature

    `Gallery generated by Sphinx-Gallery <https://sphinx-gallery.github.io>`_
