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APPENDIX D. Main symbols
|
 model state
vector |
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 true value
of the model state i.e. perfect analysis |
|
 background
model state |
|
 analysed
model state |
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 observation
vector |
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 observation
operator (maps  into the  space by providing
model equivalents of the observed values) |
|
 linearized observation
operator (in the vicinity of a predefined model state) |
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 background error
covariances (estimation error covariance matrix of  ) |
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 analysis error
covariances (estimation error covariance matrix of  ) |
|
 observation
error covariances (error covariance matrix of  |
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 analysis gain
matrix |
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 identity matrix |
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 cost function
of the variational analysis |
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 background
term of the cost function |
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 observation
term of the cost function |
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 penalization
term of the cost function |
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