The most reliable way to download the Jupyter notebook and assosictaed files is using the git clone command from your local machine.

Open the SMA GitHub page found at sma-data-reduction.

1. Click on the green 'code' button.

2. Click on the copy button to copy the link.

3. On your local machine type git clone and paste the link.

$ git clone https://github.com/Smithsonian/sma-data-reduction.git

4. From the new directory launch Jupyter notebook.

$ cd sma-data-reduction/

$ jupyter notebook sma_in_casa_tutorial.ipynb