diff --git a/notebooks/Fit ICESat-2 ATL03.ipynb b/notebooks/Fit ICESat-2 ATL03.ipynb
index 908ae77..328f774 100644
--- a/notebooks/Fit ICESat-2 ATL03.ipynb	
+++ b/notebooks/Fit ICESat-2 ATL03.ipynb	
@@ -1002,8 +1002,8 @@
     "        n_pulses = np.unique(ID_pulse).__len__()\n",
     "        frame_number = np.copy(val['heights']['pce_mframe_cnt'][idx])\n",
     "        # along-track X and Y coordinates\n",
-    "        distance_along_X = np.copy(x_atc[idx:idx+cnt])\n",
-    "        distance_along_Y = np.copy(y_atc[idx:idx+cnt])\n",
+    "        distance_along_X = np.copy(x_atc[idx])\n",
+    "        distance_along_Y = np.copy(y_atc[idx])\n",
     "        # average background photon rate for segment\n",
     "        IS2_atl03_fit[gtx]['land_ice_segments']['geophysical']['bckgrd'] = np.mean(background_rate[idx])\n",
     "        IS2_atl03_fit[gtx]['land_ice_segments']['geophysical']['bckgrd'].mask[j] = False\n",