@misc{indiciae8e10fcbe0236,
  title = {Development of an Interoperable GNSS Space Service Volume},
  author = {Parker, Joel J. K. and Bauer, Frank H. and Ashman, Benjamin W. and Miller, James J. and Enderle, Werner and Blonski, Daniel},
  year = {2018},
  url = {https://ntrs.nasa.gov/citations/20180006900},
  note = {Source identifier: 20180006900}
}