I couldn't find a formal definition quickly from my sources. However, it appears in context in a few places and it seems to use the sense of "ratify" meaning "to confirm" or "to validate". "Ratify" and "ratification" are used in places where one might expect to replace it in the prose with "verify" or "verification", as in using multiple different intelligence sources (video, photo, signals, live, etc) to build confirmatory evidence of something when multiple overlapping sources exist rather than trusting a single source.