Analysis sensitivity study within LETKF
¥It can also show the cross sensitivity by exploring the off diagonal term.
¥No cost in LETKF
assimilation framework.
¥Reflects the observation impact in the analysis.
¥Show the analysis
sensitivity to different type of observations (rawinsonde, different
type of satellite observations etc.)
Analysis mean state:
The analysis sensitivity:
Degree of Freedom of Signal (DFS): the trace of
the matrix S