diff --git a/enlilviz/enlil.py b/enlilviz/enlil.py
index 6114551..ecdbd61 100644
--- a/enlilviz/enlil.py
+++ b/enlilviz/enlil.py
@@ -106,6 +106,31 @@ def get_satellite_data(self, satellite, var, coord=None):
             varname += '_' + coord
         return self.ds.loc[{'satellite': satellite}][varname]
 
+    @_validate_satellite
+    def get_satellite_fieldline(self, satellite, time):
+        """Returns the position of the fieldline passing through the satellite.
+
+        Parameters
+        ----------
+        satellite : str
+            Satellite of interest.
+        time : datetime-like
+            Time of interest. Looks for nearest time.
+
+        Returns
+        -------
+        r : float
+            Radial positions of the fieldline (AU)
+        lat : float
+            Latitudinal positions of the fieldline (deg).
+        lon : float
+            Longitudinal positions of the fieldline (deg).
+        """
+        # Fieldlines are index based on 't' not 'earth_t'
+        ds = self.ds.sel({'t': time}, method='nearest')
+        ds = ds.loc[{'satellite': satellite}]
+        return (ds['fld_pos_r'], ds['fld_pos_lat'], ds['fld_pos_lon'])
+
     def get_slice(self, var, slice_plane, time=None):
         """Get a 2D slice of data.
 
diff --git a/enlilviz/io.py b/enlilviz/io.py
index 642b174..ffb0a3b 100644
--- a/enlilviz/io.py
+++ b/enlilviz/io.py
@@ -250,13 +250,13 @@ def _transform_variable(da):
 
     # Position validation is coordinate dependent so do those
     # conversions first
-    if da.name == 'pos_r':
+    if 'pos_r' in da.name:
         da /= _unit_conversion['AU']
         da.attrs['units'] = 'AU'
-    elif da.name == 'pos_lat':
+    elif 'pos_lat' in da.name:
         da.values = np.rad2deg(np.pi/2 - da)
         da.attrs['units'] = 'degrees_north'
-    elif da.name == 'pos_lon':
+    elif 'pos_lon' in da.name:
         da.values = np.rad2deg(da - np.pi)
         da.attrs['units'] = 'degrees_east'
 
diff --git a/enlilviz/plotting/plots.py b/enlilviz/plotting/plots.py
index d24685f..ec00eeb 100644
--- a/enlilviz/plotting/plots.py
+++ b/enlilviz/plotting/plots.py
@@ -222,6 +222,18 @@ def _init_plot(self):
                               color=SAT_COLORS[sat],
                               markeredgecolor='k', markersize=10, zorder=2)
             self.plot_data[sat] = marker
+            # Fieldlines
+            pos = run.get_satellite_fieldline(sat, self.time)
+            mask = np.logical_or(pos[0].values <= RMIN,
+                                 pos[0].values >= RMAX)
+
+            lon_field = np.ma.masked_array(np.deg2rad(pos[2]), mask=mask)
+            r_field = np.ma.masked_array(pos[0], mask=mask)
+
+            line, = ax.plot(lon_field, r_field,
+                            color=SAT_COLORS[sat],
+                            linestyle='-.', zorder=1)
+            self.plot_data[sat + '_fieldline'] = line
 
         # Circle on Earth (1AU)
         # ax.axvline(0., c='k', zorder=1)
@@ -258,6 +270,17 @@ def update(self):
             pos = run.get_satellite_position(sat, self.time)
             self.plot_data[sat].set_data(np.deg2rad(pos[2]), pos[0])
 
+            # Fieldlines
+            pos = run.get_satellite_fieldline(sat, self.time)
+            mask = np.logical_or(pos[0].values <= RMIN,
+                                 pos[0].values >= RMAX)
+
+            lon_field = np.ma.masked_array(np.deg2rad(pos[2]), mask=mask)
+            r_field = np.ma.masked_array(pos[0], mask=mask)
+
+            self.plot_data[sat + '_fieldline'].set_data(
+                lon_field, r_field)
+
 
 class LongitudeSlice(_BasePlot):
     """A longitude polar slice plot, which is in latitude-radial coordinates.
@@ -310,6 +333,19 @@ def _init_plot(self):
                               markeredgecolor='k', markersize=10, zorder=2)
             self.plot_data[sat] = marker
 
+            # Fieldlines
+            pos = run.get_satellite_fieldline(sat, self.time)
+            mask = np.logical_or(pos[0].values <= RMIN,
+                                 pos[0].values >= RMAX)
+
+            lat_field = np.ma.masked_array(np.deg2rad(pos[1]), mask=mask)
+            r_field = np.ma.masked_array(pos[0], mask=mask)
+
+            line, = ax.plot(lat_field, r_field,
+                            color=SAT_COLORS[sat],
+                            linestyle='-.', zorder=1)
+            self.plot_data[sat + '_fieldline'] = line
+
         # x == theta, y == r
         circle_points = np.linspace(0, 2*np.pi)
         ax.plot(circle_points, np.ones(len(circle_points)), c='k',
@@ -342,6 +378,16 @@ def update(self):
         for sat in ['Earth']:
             pos = run.get_satellite_position(sat, self.time)
             self.plot_data[sat].set_data(np.deg2rad(pos[1]), pos[0])
+            # Fieldlines
+            pos = run.get_satellite_fieldline(sat, self.time)
+            mask = np.logical_or(pos[0].values <= RMIN,
+                                 pos[0].values >= RMAX)
+
+            lat_field = np.ma.masked_array(np.deg2rad(pos[1]), mask=mask)
+            r_field = np.ma.masked_array(pos[0], mask=mask)
+
+            self.plot_data[sat + '_fieldline'].set_data(
+                lat_field, r_field)
 
 
 class RadialSlice(_BasePlot):