diff --git a/notebooks/visualize-in-situ-satellite-aerosol.ipynb b/notebooks/visualize-in-situ-satellite-aerosol.ipynb
index 48b0b4a..9b7ca01 100644
--- a/notebooks/visualize-in-situ-satellite-aerosol.ipynb
+++ b/notebooks/visualize-in-situ-satellite-aerosol.ipynb
@@ -679,8 +679,6 @@
     "                print(url)\n",
     "                print('downloading....%s of %s files.'%(i, len(filedata)))\n",
     "                i = i+1\n",
-    "    return filenameout\n",
-    "\n",
     "\n",
     "    return \n",
     "\n",