Abstract
An investigation into the trajectory prediction accuracy impact of Controller-Pilot Data Link Communication (CPDLC) messages to Trajectory-Based Operations (TBO) is presented. It is expected that clearances communicated via CPDLC will provide input to a ground-based trajectory prediction for use by decision support automation. Many of the clearances defined in existing and emerging standards for CPDLC messages produce ambiguity and inaccuracy in the resulting trajectory prediction. This paper quantifies these inaccuracies for a subset of messages and provides guidance on how to determine suitability of messages for TBO. This paper also discusses the complexity of translating clearances into trajectory representations that enable trajectory reconformance and candidate uses for CPDLC downlink messages in trajectory prediction.
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