Pulsar Positioning System: Why it Matters for all Classes of Technosignatures

The Pulsar Positioning System (PPS) is like a galactic GPS using millisecond pulsars (MSPs) for timing, navigation and as a metadata communication standard. It puts important constraints and informs the search space for the four classes of technosignatures:(1) Messaging to Extraterrestrials (METI);(2) Communicative Technosignatures;(3) Search for Extraterrestrial Artifacts (SETA);(4) Nature+ (e.g. stellar or galactic engineering).