@phdthesis{74181,
  author = {J.C. Derber and R. Treadon and W-S. Wu and S. Saha},
  title = {Diagnosis of observational error characteristics and data assimilation skill at NCEP},
  year = {1999},
  journal = {Workshop on Diagnosis of Data Assimilation Systems, 2 - 4 November 1998},
  pages = {67-72},
  month = {1999},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}