@misc{indiciae25388c112ac3,
  title = {Comparison of Observation Impacts in Two Forecast Systems using Adjoint Methods},
  author = {Gelaro, Ronald and Langland, Rolf and Todling, Ricardo},
  year = {2009},
  url = {https://ntrs.nasa.gov/citations/20100002942},
  note = {Source identifier: 20100002942}
}