Definition
A physical location where a network or service provider has equipment that allows users to connect to a larger network. In aviation contexts, a POP is typically a ground access point through which aeronautical data, communications, or flight information services are exchanged between users and the wider network.
Plain English
A spot on the ground where a network has its connection equipment, so users in that area can plug into the larger system.
Context Anchor
Seen in FAA acronym lists and in material about aviation communication or data systems.
Derivation
From the ordinary phrase 'point of presence' — literally, a place where the network is present. The term came out of the telecommunications industry and carries the same meaning in aviation use.
Why Pilots Care
Pilots rarely deal with POPs directly, but the term shows up in documentation about how flight data, weather, and communication services reach the cockpit or the flight planning room. Knowing what it means prevents confusion when reading network or service descriptions.
Intuition Check
Do not read presence as meaning a person is physically present. Here it means a communications network has equipment and service available at a specific location.
Example Sentence 1
The flight planning service connects through a regional point of presence to deliver weather data to subscribers.
Example Sentence 2
The data link remained stable once the aircraft entered range of the regional POP.