@misc{indiciaea6d3cfa69b0e,
  title = {IKONOS geometric characterization},
  author = {Dennis Helder and Michael Coan and Kevin Patrick and Peter Gaska},
  year = {2003},
  doi = {10.1016/j.rse.2003.04.002},
  url = {https://pubs.usgs.gov/publication/70156524},
  note = {Source identifier: 70156524}
}