I'm curious where FlightAware got the data from, since it is much more frequent data points than many other flights at that stage of flight. Sometimes FlightAware will provide the facility (e.g. Oakland ARTCC, SoCal TRACON, etc.) for the source, which indicates that the data flowed through the National Offload Program. In this case the source is "FlightAware." Are there any other options for the data's source, e.g. ADS-B Out?