@misc{indiciae2ea61a6bd657,
  title = {Airspace Safety Threshold Study: NAS-Wide Encounter Rate Evaluation Using Historical Radar Data and ACES},
  author = {Johnson, Marcus A. and Thipphavong, David P. and Park, Chunki and Santiago, Confesor and Mueller, Eric},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20190027491},
  note = {Source identifier: 20190027491}
}