diff --git a/figures/beacon/src/four_antenna_setup.py b/figures/beacon/src/four_antenna_setup.py
index 0d22719..a889b0f 100755
--- a/figures/beacon/src/four_antenna_setup.py
+++ b/figures/beacon/src/four_antenna_setup.py
@@ -63,7 +63,7 @@ def antenna_baselines(antennas):
     return combinations(antennas, 2)
 
 
-def plot_four_antenna_geometry(tx, ants, extra_ant=None, ax=None, line_kwargs={}, scatter_kwargs={}, scatter_zorder=5):
+def plot_four_antenna_geometry(tx, ants, extra_ant=None, ax=None, line_kwargs={}, scatter_kwargs={}, scatter_zorder=5, annotate_td=True):
 
     default_line_kwargs = dict( color='grey', lw=3, alpha=0.7)
     default_scatter_kwargs = dict( color='grey', s=200)
@@ -88,9 +88,19 @@ def plot_four_antenna_geometry(tx, ants, extra_ant=None, ax=None, line_kwargs={}
 
     # Lines connecting Tx and ants
     tmp_line_kwargs = line_kwargs
+    tmp_line_kwargs['linestyle'] = '--'
     for ant in ants:
         ax.plot([tx.x, ant.x], [tx.y, ant.y], **tmp_line_kwargs)
 
+        if annotate_td:
+            annot_kwargs = dict(va='bottom', ha='center')
+            dx, dy = 0, 0.1
+            x = (tx.x + ant.x)/2 + dx
+            y = (tx.y + ant.y)/2 + dy
+
+
+            ax.annotate(f'$t_{{d{ant.name}}}$', (x,y), **annot_kwargs)
+
     # Lines due to all Antennas (including extra_ant)
     if extra_ant is not None:
         line_offset = 0.08*np.array([1,1])
@@ -111,6 +121,7 @@ def plot_four_antenna_geometry(tx, ants, extra_ant=None, ax=None, line_kwargs={}
     # Lines internal to ants triangle
     tmp_line_kwargs = line_kwargs
     tmp_line_kwargs['color'] = 'green'
+    tmp_line_kwargs['linestyle'] = '-'
     tmp_line_kwargs['alpha'] = 0.7
     for j, ant_pair in enumerate(combinations(ants,2)):
         a, b = ant_pair[0], ant_pair[1]