diff --git a/notebooks/S1-SLC-IW-gamma-flattening.ipynb b/notebooks/S1-SLC-IW-gamma-flattening.ipynb
index 629c718..7b943fb 100644
--- a/notebooks/S1-SLC-IW-gamma-flattening.ipynb
+++ b/notebooks/S1-SLC-IW-gamma-flattening.ipynb
@@ -31,7 +31,7 @@
     "import xarray as xr\n",
     "import xarray_sentinel\n",
     "\n",
-    "from sarsen import apps, geocoding, orbit, scene"
+    "from sarsen import apps, geocoding, radiometry, orbit, scene"
    ]
   },
   {
@@ -239,7 +239,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "grid_parameters = apps.azimuth_slant_range_grid(\n",
+    "grid_parameters = radiometry.azimuth_slant_range_grid(\n",
     "    measurement_ds, coordinate_conversion, grouping_area_factor\n",
     ")\n",
     "grid_parameters"
@@ -255,7 +255,7 @@
    "outputs": [],
    "source": [
     "%%time\n",
-    "weights = geocoding.gamma_weights(\n",
+    "weights = radiometry.gamma_weights(\n",
     "    dem_ecef,\n",
     "    acquisition,\n",
     "    **grid_parameters,\n",