Unidata is in the process of moving its software documentation to a new location in this documentation portal. This project is still in progress, and information for some packages has not yet been moved. We're also still working on the visual appearance of the site, so please pardon the "Under Construction" appearance. (Also, the search field at the top right isn't working quite right yet, sorry! Searching within the individual documentation sets should work as you expect.)
Note: Documentation for packages marked with is available on GitHub rather than on Unidata servers.