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