diff --git a/simulations/airshower_beacon_simulation/do_reconstruction.py b/simulations/airshower_beacon_simulation/do_reconstruction.py
new file mode 100755
index 0000000..d0f968a
--- /dev/null
+++ b/simulations/airshower_beacon_simulation/do_reconstruction.py
@@ -0,0 +1,96 @@
+#!/usr/bin/env python3
+# vim: fdm=indent ts=4
+
+import h5py
+import matplotlib.pyplot as plt
+from mpl_toolkits.mplot3d import Axes3D
+import numpy as np
+from copy import deepcopy
+
+import aa_generate_beacon as beacon
+import lib
+from lib import rit
+from earsim import REvent, Antenna
+from atmocal import AtmoCal
+
+if __name__ == "__main__":
+    from os import path
+    import sys
+
+    fname = "ZH_airshower/mysim.sry"
+
+    ####
+    fname_dir = path.dirname(fname)
+    if True: # use the original files
+        ev = REvent(fname)
+
+        # Full reconstruction?
+        if False:
+            print("Full reconstruction")
+            res = rit.reconstruction(ev, outfile='ritdir/fig.pdf')
+            sys.exit(0)
+        
+        # Else do single slice for original timing
+        # and randomised timing
+        print("Shower plane reconstruction + randomised timing")
+
+        atm = AtmoCal()
+        X = 750
+        max_clock_offset = 100 # ns
+        rit.set_pol_and_bp(ev)
+        dXref = atm.distance_to_slant_depth(np.deg2rad(ev.zenith),X,0)
+        scale2d = dXref*np.tan(np.deg2rad(2.))
+
+        ants_copy = deepcopy(ev.antennas)
+        # randomise timing for antenna copies
+        seed = 12345
+        rng = np.random.default_rng(seed)
+
+        clock_offsets = max_clock_offset * (2*rng.uniform(size=len(ants_copy)) - 1)
+        for i, ant in enumerate(ants_copy):
+            ant.t -= clock_offsets[i]
+
+        fig, axs = plt.subplots(1,2, sharex=True, sharey=True)
+        fig.suptitle(f"Reconstructed Shower plane slice at X={X}")
+        for ax in axs:
+            ax.set_xlabel("-v x B (m)")
+            ax.set_ylabel(" vxvxB (m)")
+        axs[0].set_title("Simulated timing")
+        axs[1].set_title(f"Randomised timing [0, {max_clock_offset}]")
+
+        try:
+            for i, ax in enumerate(axs):
+                # modify timing
+                if i == 1:
+                    ev.antennas = ants_copy
+
+                xx,yy,p,km= rit.shower_plane_slice(ev,X,21,21,scale2d,scale2d)
+
+                if i == 0:
+                    vmax, vmin = max(p), min(p)
+
+                sc = ax.scatter(xx,yy,c=p, vmax=vmax, vmin=vmin)
+
+                # Plot centers
+                im = np.argmax(p)
+
+                ax.plot(0, 0,'r+',ms=30)
+                ax.plot(xx[im],yy[im],'bx',ms=30)
+
+            fig.colorbar(sc, ax=axs[0])
+        # Always make sure to show the plot
+        finally:
+            plt.show()
+
+            
+
+    else:
+        raise NotImplementedError
+        antennas_fname = path.join(fname_dir, beacon.antennas_fname)
+
+        if not path.isfile(antennas_fname):
+            print("Antenna file cannot be found, did you try generating a beacon?")
+            sys.exit(1)
+
+
+    plt.show()