@inbook{74319,
  author = {ECMWF},
  title = {IFS Documentation CY40R1 - Part I: Observation Processing},
  abstract = {<p>
  Chapter 1 Observation operators<br>Chapter 2 Observation processing<br>Chapter 3 Observation screening<br>References</p>
},
  year = {2014},
  journal = {IFS Documentation CY40R1},
  number = {1},
  month = {2014},
  publisher = {ECMWF},
  url = {https://www.ecmwf.int/node/9201},
  doi = {10.21957/15dz0m2t},
  note = {<p>
  Operational implementation 22 November 2013</p>
},
  language = {eng},
}