Systems and methods for receiving flight messages relating to a particular flight from multiple sources and processing information in those flight messages to create a single representation of an updated current and intended trajectory of such flight. Preferably, the system comprises one or more processors for performing the following operations: determining which flight message is the most recent; determining which flight messages are relevant; authenticating and processing proposed updates; and merging information contained in the flight messages to create a single representation of one or both of current or intended flight information.