@manual{75399,
  author = {X. Li and G.A. Kelly and S. Uppala and R. Saunders and J. Gibson},
  title = {The use of VTPR raw radiances in ERA-40.},
  year = {2005},
  journal = {ERA-40 Project Report Series},
  number = {21},
  pages = {20},
  month = {12/2005},
  publisher = {ECMWF},
  address = {Shinfield Park, Reading},
  language = {eng},
}