IGARSS_LIU_XU_2011.ppt

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A PRINCIPAL COMPONENT-BASED RADIATIVE TRANSFER MODEL AND ITS APPLICATION TO HYPERSPECTRAL REMOTE SENSING Xu Liu NASA Langley Research Center, Hampton VA 23681 W. Wu, Hui Li, D. K. Zhou, A. M. Larar, and P. Yang

Presentation outline ,[object Object],[object Object],[object Object],[object Object]

Why radiative transfer model is important for hypersectral remote sensing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

How to deal with large amount of hyperspectral data? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

PCRTM is very accurate and has been applied to IASI, nast-I, AIRS, and CLARREO

Apply PCRTM to Orbiting Carbon Observatory (OCO) O 2 A-band ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Apply PCRTM to SCIAMACHY O 2 A-band ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Why PCRTM is very fast ? ,[object Object],[object Object],[object Object],[object Object],NAST-I Spectral Band Number of Channels No. of RT Calc. for All NAST Channels Predictors per Channel PCRTM 8632 310-900 0.04-0.1 PFAST 8632 8632 ~40 OSS 8632 22316 2.59

PCRTM computes cloud radiative contribution efficiently ,[object Object],[object Object],[object Object],[object Object],[object Object]

PCRTM retrieval compares well with radiosondes ,[object Object],[object Object],[object Object],[object Object]

PCRTM retrieved surface temperature and emssivity and comparison with field validation data ,[object Object],[object Object]

Example of retrieved cloud properties Cloud Optical Depth (truth) Cloud Optical Depth Cloud Effective size (  m) Effective Size (truth,  m)

PCRTM retrieved monthly mean climate related properties (T, water) ,[object Object],[object Object],[object Object],[object Object]

Applying PCRTM to calculate the OLR and comparison with CERES observations ,[object Object],[object Object],[object Object],[object Object],[object Object]

Summary and Conclusions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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