- align with devel.

Author: hirokawa

tutorials/cssrlib.ipynb

@@ -84,7 +84,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": null,
    "id": "bUmrxVJrgkUF",
    "metadata": {
     "colab": {
@@ -212,7 +212,7 @@
    "source": [
     "# %pip install notebook numpy matplotlib  # Already installed in Colab but may be needed if running locally\n",
     "\n",
-    "%pip install bitstruct galois\n",
+    "%pip install bitstruct galois crccheck\n",
     "%pip install cartopy                      # Comment this line out if running in Windows\n",
     "%pip install pysolid                      # Comment this line out if running in Windows"
    ]
@@ -5152,9 +5152,9 @@
     "id": "7d78ff97"
    },
    "source": [
-    "- [1] T. Takasu, “RTKLIB: Open Source Program Package for RTK-GPS,” FOSS4G 2009 Tokyo, Japan, 2009.\n",
-    "-  Hirokawa, R., Hauschild, A., Everett, T. (2023). Python Toolkit for Open PPP/PPP-RTK Services. In *Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023)*\n",
-    "-  Hirokawa, R., Hauschild, A. (2025). CSSRlib: Python Toolkit for High-Accuracy, Secure, and Resilient Positioning Services. In *Proceedings of the 37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2025)*"
+    "- [^1] T. Takasu, “RTKLIB: Open Source Program Package for RTK-GPS,” FOSS4G 2009 Tokyo, Japan, 2009.\n",
+    "- [^2] Hirokawa, R., Hauschild, A., Everett, T. (2023). Python Toolkit for Open PPP/PPP-RTK Services. In *Proceedings of the 35th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2023)*\n",
+    "- [^3] Hirokawa, R., Hauschild, A. (2025). CSSRlib: Python Toolkit for High-Accuracy, Secure, and Resilient Positioning Services. In *Proceedings of the 37th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS+ 2025)*"
    ]
   },
   {