diff --git a/ncl/ncl_entries/great_circle.ipynb b/ncl/ncl_entries/great_circle.ipynb
index 3e95ab0a..df8a6f9c 100644
--- a/ncl/ncl_entries/great_circle.ipynb
+++ b/ncl/ncl_entries/great_circle.ipynb
@@ -90,13 +90,13 @@
     }
    ],
    "source": [
-    "from astropy.coordinates.representation import CartesianRepresentation, UnitSphericalRepresentation\n",
+    "from astropy.coordinates.representation import UnitSphericalRepresentation\n",
     "from astropy import units\n",
     "\n",
     "lat = 40.0150\n",
     "lon = -105.2705\n",
     "\n",
-    "spherical_coords = UnitSphericalRepresentation(lat=lat*units.deg, lon=lon*units.deg)\n",
+    "spherical_coords = UnitSphericalRepresentation(lat=lat * units.deg, lon=lon * units.deg)\n",
     "cart_coords = spherical_coords.to_cartesian()\n",
     "print(f\"X = {cart_coords.x.value}\")\n",
     "print(f\"Y = {cart_coords.y.value}\")\n",
diff --git a/ncl/receipts/great_circle.ipynb b/ncl/receipts/great_circle.ipynb
index 8942b39e..cc7392c8 100644
--- a/ncl/receipts/great_circle.ipynb
+++ b/ncl/receipts/great_circle.ipynb
@@ -146,9 +146,9 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "#import geocat.datafiles as gdf\n",
+    "import geocat.datafiles as gdf\n",
     "import numpy as np\n",
-    "from astropy.coordinates.representation import CartesianRepresentation, UnitSphericalRepresentation\n",
+    "from astropy.coordinates.representation import UnitSphericalRepresentation\n",
     "from astropy import units\n",
     "\n",
     "css2c_data = gdf.get('applications_files/ncl_outputs/css2c_output.txt')\n",
@@ -168,15 +168,17 @@
    "source": [
     "## Collect Latitude and Longtiude Pairs\n",
     "lat_lon = []\n",
-    "for lat in range(-90, 90+1):\n",
-    "    for lon in range(-180, 180+1):\n",
+    "for lat in range(-90, 90 + 1):\n",
+    "    for lon in range(-180, 180 + 1):\n",
     "        lat_lon.append((lat, lon))\n",
     "\n",
     "## Calculate Cartesian coordinates\n",
     "astropy_css2c = {}\n",
     "for i, pair in enumerate(lat_lon):\n",
     "    lat, lon = pair\n",
-    "    spherical_coords = UnitSphericalRepresentation(lat=lat*units.deg, lon=lon*units.deg)\n",
+    "    spherical_coords = UnitSphericalRepresentation(\n",
+    "        lat=lat * units.deg, lon=lon * units.deg\n",
+    "    )\n",
     "    cart_coords = spherical_coords.to_cartesian()\n",
     "    astropy_css2c[pair] = cart_coords.xyz.value"
    ]
@@ -249,9 +251,9 @@
    "source": [
     "for key in ncl_css2c.keys():\n",
     "    if key in astropy_css2c.keys():\n",
-    "        assert abs(ncl_css2c[key][0]- astropy_css2c[key][0]) < 0.000005\n",
-    "        assert abs(ncl_css2c[key][1]- astropy_css2c[key][1]) < 0.000005\n",
-    "        assert abs(ncl_css2c[key][2]- astropy_css2c[key][2]) < 0.000005"
+    "        assert abs(ncl_css2c[key][0] - astropy_css2c[key][0]) < 0.000005\n",
+    "        assert abs(ncl_css2c[key][1] - astropy_css2c[key][1]) < 0.000005\n",
+    "        assert abs(ncl_css2c[key][2] - astropy_css2c[key][2]) < 0.000005"
    ]
   }
  ],