@inbook{81731,
  author = {ECMWF},
  title = {IFS Documentation CY50R1 - Part 1: Observations},
  abstract = {<p class="MsoNoSpacing">Chapter 1 Overview: the observation world<br />
Chapter 2 Preparation of observations<br />
Chapter 3 Observation operators&nbsp;<br />
Chapter 4 Screening&nbsp;<br />
Chapter 5 Deprecated areas&nbsp;<br />
Chapter 6 Tables, codes and flags</p>
},
  year = {2026},
  journal = {IFS Documentation CY50R1},
  chapter = {1},
  month = {06/2026},
  publisher = {ECMWF},
  url = {&nbsp;},
  doi = {10.21957/947845be20},
}