@misc{75390,
  author = {Martin Leutbecher},
  title = {A reduced rank estimate of forecast error variance changes due to intermittent modifications of the observing network},
  year = {2002},
  journal = {ECMWF Technical Memoranda},
  number = {384},
  pages = {20},
  month = {09/2002},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  url = {https://www.ecmwf.int/node/10720},
  doi = {10.21957/hzg685l6i},
  language = {eng},
}