FIX: Add get_azimuth xradar (#1547)

* FIX: Fix handling of instrument params

* ADD: Add get_azimuth method to xradar

pyart/xradar/accessor.py

@@ -712,6 +712,32 @@ def _find_fields(self, ds):
                 }
         return fields
 
+    def get_azimuth(self, sweep, copy=False):
+        """
+        Return an array of azimuth angles for a given sweep.
+
+        Parameters
+        ----------
+        sweep : int
+            Sweep number to retrieve data for, 0 based.
+        copy : bool, optional
+            True to return a copy of the azimuths. False, the default, returns
+            a view of the azimuths (when possible), changing this data will
+            change the data in the underlying Radar object.
+
+        Returns
+        -------
+        azimuths : array
+            Array containing the azimuth angles for a given sweep.
+
+        """
+        s = self.get_slice(sweep)
+        azimuths = self.azimuth["data"][s]
+        if copy:
+            return azimuths.copy()
+        else:
+            return azimuths
+
 
 def _point_data_factory(grid, coordinate):
     """Return a function which returns the locations of all points."""

tests/xradar/test_accessor.py

@@ -19,6 +19,16 @@ def test_get_field(filename=filename):
     assert reflectivity.shape == (480, 996)
 
 
+def test_get_azimuth(filename=filename):
+    dtree = xd.io.open_cfradial1_datatree(
+        filename,
+        optional=False,
+    )
+    radar = pyart.xradar.Xradar(dtree)
+    azimuths = radar.get_azimuth(0)
+    assert azimuths.shape == (480,)
+
+
 def test_instrument_parameters(filename=filename):
     dtree = xd.io.open_cfradial1_datatree(
         filename,