While trying to re-tag this question I've been unable to remove the tag
kalman and replace it with
kalman-filters. Whenever I try that, I just get left with the tag
kalman was merged with the tag
kalman-filters some time ago... and now it's back for some reason.
Other non-moderator users have edited that question and added a new tag... which is not what is required. We just want to use the hyphenated tag.