@misc{indiciae4cc826ce1e7e,
  title = {Estimating effective data density in a satellite retrieval or an objective analysis},
  author = {Purser, R. J. and Huang, H.-L.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19930060839},
  note = {Source identifier: 19930060839}
}