In GPS, what is the purpose of the almanac data?

The purpose of the almanac data in GPS is to determine the satellites' operational status. This data contains approximate orbital information for all the satellites in the GPS constellation, which helps the receiver determine which satellites are currently available for use. The almanac provides essential information regarding the health of each satellite, allowing the receiver to identify those that are operational and can be utilized for precise positioning. While users may benefit from having a general idea of the satellites' positions and health, the almanac itself does not provide the precise measurements needed for calculating user location or managing satellite traffic.