@inbook{81186,
  author = {ECMWF},
  title = {IFS Documentation CY47R1 - Part I: Observations},
  abstract = {<p>
  Chapter 1 Overview : The observation world<br>Chapter 2 Preparation of observations<br>Chapter 3 Observation operators<br>Chapter 4 Screening<br>Chapter 5 Deprecated areas<br>Chapter 6 Tables, codes and flags</p>
},
  year = {2020},
  journal = {IFS Documentation CY47R1},
  number = {1},
  month = {2020},
  publisher = {ECMWF},
  url = {https://www.ecmwf.int/node/19745},
  doi = {10.21957/ftq7iq93j},
  language = {eng},
}