TY - RPRT TI - ATD-2 Surface Scheduling and Metering Concept AU - Coppenbarger, Richard A. AU - Jung, Yoon Chul AU - Capps, Richard Alan AU - Engelland, Shawn A. PY - 2017 UR - https://ntrs.nasa.gov/citations/20170004722 ID - 20170004722 ER -