@misc{indiciaec4a299ba7502,
  title = {Airborne Digital Sensor System and GPS-aided inertial technology for direct geopositioning in rough terrain},
  author = {Richard D. Sanchez},
  year = {2004},
  doi = {10.3133/ofr20041391},
  url = {https://pubs.usgs.gov/publication/ofr20041391},
  note = {Source identifier: ofr20041391}
}