1. Cloud decontamination scheme
Variational
cloud-decontamination prototype
Decontaminated spectrum
Atmospheric parameters
Cloudy component
Clear component
Measurement
Partially cloudy adjacent IASI fields of view(FOV)
Each measured spectrum (black) is the linear combination of clear (blue) and cloudy (red) components. Measured spectra for the 4 IASI fields of view are given as input of the cloud-decontamination process, which provides the clear component spectrum, and the corresponding retrieved atmospheric parameters.
17/01/2019
NOV-30XX-SL-XXX

2. Spectral correction algorithm
Variational cloud-clearing algorithm
RTM
Scguessj
(j=1,J)
ajk , qjk , qk
(j=1,J: k=1,K)
AVHRR analysis
Sok
(k=1,K)
Seik
ajk
Scij
eik +
j=1,J
k=1,K
i=1,It
17/01/2019
NOV-30XX-SL-XXX