@misc{indiciaefadbc5107cde,
  title = {CONSTELL: NASA's Satellite Constellation Model},
  author = {Theall, Jeffrey R. and Krisko, Paula H. and Opiela, John N. and McKay, Gordon A.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20000112918},
  note = {Source identifier: 20000112918}
}