@inbook{77035, author = {ECMWF and P. White}, title = {IFS Documentation CY25R1 - Part II: Data Assimilation}, abstract = {

Chapter 1 ‘Incremental formulation of 3D/4D variational assimilation—an overview
Chapter 2 ‘3D variational assimilation
Chapter 3 ‘4D variational assimilation
Chapter 4 ‘Background term
Chapter 5 ‘Conventional observational constraints
Chapter 6 ‘Satellite observational constraints
Chapter 7 ‘Background, analysis and forecast errors
Chapter 8 ‘Gravity-wave control
Chapter 9 ‘Data partitioning (OBSORT)
Chapter 10 ‘Observation screening
Chapter 11 ‘Analysis of snow
Chapter 12 ‘Land surface analysis
Chapter 13 ‘Sea surface temperature and sea-ice analysis
Chapter 14 ‘Reduced-rank Kalman filter
REFERENCES

}, year = {2003}, journal = {IFS Documentation CY25R1}, number = {2}, month = {09/2003}, publisher = {ECMWF}, url = {https://www.ecmwf.int/node/13278}, doi = {10.21957/x9mockpi7}, note = {

Operational implementation 9 April 2002

}, language = {eng}, }