@misc{indiciaebff3d9e18008,
  title = {Inter-Symbol Guard Time for Synchronizing Optical PPM},
  author = {Far, William and Gin, Jonathan and Srinivasan, Meera and Quirk, Kevin},
  year = {2009},
  url = {https://ntrs.nasa.gov/citations/20090027783},
  note = {Source identifier: 20090027783}
}