@misc{indiciae517a5bc17d3b,
  title = {Geomagnetic Secular Variation Forecast using the NASA GEMS Ensemble Kalman filter: A Candidate SV Model for IGRF‑13},
  author = {Andrew Tangborn and Weijia Kuang and Terence J Sabaka and Ce Yi},
  year = {2021},
  url = {https://ntrs.nasa.gov/citations/20210010688},
  note = {Source identifier: 20210010688}
}