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        "\n# Example on retrieving and plotting winds\n\nThis is a simple example for how to retrieve and plot winds from 2 radars\nusing PyDDA.\n\nAuthor: Robert C. Jackson\n"
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    {
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      "source": [
        "import pydda\nfrom matplotlib import pyplot as plt\n\nberr_grid = pydda.io.read_grid(pydda.tests.EXAMPLE_RADAR0)\ncpol_grid = pydda.io.read_grid(pydda.tests.EXAMPLE_RADAR1)\n\n# Load sounding data and insert as an intialization\nberr_grid = pydda.initialization.make_constant_wind_field(\n    berr_grid, (0.0, 0.0, 0.0), vel_field=\"corrected_velocity\"\n)\n\n# Start the wind retrieval. This example only uses the mass continuity\n# and data weighting constraints.\nGrids, _ = pydda.retrieval.get_dd_wind_field(\n    [berr_grid, cpol_grid],\n    Co=1.0,\n    Cm=256.0,\n    Cx=0.0,\n    Cy=0.0,\n    Cz=0.0,\n    Cb=0.0,\n    frz=5000.0,\n    filter_window=5,\n    mask_outside_opt=True,\n    upper_bc=1,\n    wind_tol=0.5,\n    engine=\"scipy\",\n)\n\n# Plot a horizontal cross section\nplt.figure(figsize=(9, 9))\npydda.vis.plot_horiz_xsection_barbs(\n    Grids,\n    background_field=\"reflectivity\",\n    level=6,\n    w_vel_contours=[5, 10, 15],\n    barb_spacing_x_km=5.0,\n    barb_spacing_y_km=15.0,\n    vmin=0,\n    vmax=70,\n)\nplt.show()\n\n# Plot a vertical X-Z cross section\nplt.figure(figsize=(9, 9))\npydda.vis.plot_xz_xsection_barbs(\n    Grids,\n    background_field=\"reflectivity\",\n    level=40,\n    w_vel_contours=[5, 10, 15],\n    barb_spacing_x_km=10.0,\n    barb_spacing_z_km=2.0,\n    vmin=0,\n    vmax=70,\n)\nplt.show()\n\n# Plot a vertical Y-Z cross section\nplt.figure(figsize=(9, 9))\npydda.vis.plot_yz_xsection_barbs(\n    Grids,\n    background_field=\"reflectivity\",\n    level=40,\n    barb_spacing_y_km=10.0,\n    barb_spacing_z_km=2.0,\n    vmin=0,\n    vmax=70,\n)\nplt.show()"
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