@misc{indiciae9aa79c600799,
  title = {Spitzer Instrument Pointing Frame (IPF) Kalman Filter Algorithm},
  author = {Bayard, David S. and Kang, Bryan H.},
  year = {2004},
  url = {https://ntrs.nasa.gov/citations/20090022181},
  note = {Source identifier: 20090022181}
}