TY - RPRT TI - Search for Underutilized Airspace for eXtensible Traffic Management (xTM) Operations Based on Air Traffic Patterns AU - Jinhua Li AU - Min Xue AU - Paul U Lee AU - Priyank Pradeep PY - 2023 UR - https://ntrs.nasa.gov/citations/20230004435 ID - 20230004435 ER -