@misc{indiciae4972606c5c9b,
  title = {Tracking and data relay satellite system configuration and tradeoff study. Volume 3: Part 2 spacecraft design},
  author = {Hill, T. E.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730014095},
  note = {Source identifier: 19730014095}
}