[Spice_announce] Anonymous FTP to the NAIF server was terminated on July 1, 2023

[Boris Semenov]

NAIF announces that the anonymous FTP access to the NAIF server was 
terminated on July 1, 2023 in order to comply with the NASA 
cybersecurity policy.

Anybody who used anonymous FTP to download files from the NAIF server 
can switch to HTTPS to continue these downloads.

Through HTTPS one can access all SPICE kernels and other SPICE materials 
available on the NAIF server starting at top link

     https://naif.jpl.nasa.gov/pub/naif/

For users using wget, the download help page

     https://naif.jpl.nasa.gov/naif/download_tip.html

shows wget options helpful for downloading just directories of interest 
without unnecessary extra HTML files.