The following packages are required:
Then for FreeBSD, Debian and CentOS,
pkg_add npstats-<version>.tbz
dpkg -i npstats-<version>.deb
rpm -i npstats-<version>.rpm
The packages are available from the software section of the noaaport.net site. Download the appropriate npstats package from the software section. From the same site, download the appropriate version of the novrapoll program and install it as
/usr/local/libexec/npstats/pollers/novrapoll
making sure that it is executable.