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In fact, Sequence of Events Recording systems using GPS time sync are indeed used in airports, but it is less common, in my experience. To know precisely the status of equipment and a record of events is useful, but its usefulness depends on the complexity of the electrical network. If the airport uses a simple radial system with manual backup power systems, then 1-second resolution of events may be sufficient. If the airport is modern, with some data centers, UPS power, backup generation, etc, then it could be very useful for the network operator to have this precision. Of course, everything is subject to budget, so that is why larger data centers, hospitals, and other “critical power applications” are more likely to justify this equipment.
Hello. GPS precision time synchronization is used for power systems where reliability is critical, such as electric utility grid, data centers, hospitals, refineries, etc. For standard applications, power monitoring with 1-second resolution may be enough. But for critical power applications, engineers must distinguish events within 1 ms. Typically, GPS time sync is used in “Sequence of Events Recording” (SER) systems, in which every power system event is recorded within 1 ms. This is necessary for system troubleshooting to know the exact sequence of every action. It can also be useful to record all aspects of a system test to produce a written record of the successful test. Such proof of monthly tests is sometimes required for hospitals and other sites which use stand-by generation.
I hope this additional explanation is useful.
