IPS is Indoor positioning systems i.e. Any system that attempts to provide an accurate position inside of a covered structure, such as an Airport, a Subway, or a Mall. It is generally implied that modern indoor positioning systems do not use GPS Satellites due to GPS’s inability to penetrate structures or define a specific location point in an area more granular than 20 meters. An IPS relies on nearby anchors (nodes with a known position), which either actively locate tags or provide environmental context for devices to sense.

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