Cloud-Cleared Radiance of Geostationary Hyper-Spectral Infrared Sounder Based on Collocated Image

Gong, X.; Li, J.; Li, Z.; Yin, R.; Han, W.

doi:10.1142/9789811275449_0014

Cited by 3 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar to hyperspectral IR sounders on polar‐orbiting satellites, assimilating GeoHIS radiances in cloudy skies is challenging (J. Li, Geer, et al., 2022), while OCC method can still be applied to generate CCRs from collocated imager clear radiances within the sounder sub‐footprint. For instance, GIIRS footprints with partial cloud cover can be cloud‐cleared using the clear portions of radiances from a high spatial resolution imager called Advanced Geostationary Radiation Imager (AGRI) within the GIIRS footprint (Gong et al., 2022). However, one challenging is to meet the spatial homogeneity assumption for GIIRS.…”

Section: Introductionmentioning

confidence: 99%

Enhancing Clear Radiance Generation for Geostationary Hyperspectral Infrared Sounder Using High Temporal Resolution Information

Di,

Li,

et al. 2024

Geophysical Research Letters

View full text Add to dashboard Cite

With high spatio‐temporal resolution geostationary hyperspectral infrared sounder (GeoHIS) observations, monitoring, and predicting rapidly changing weather events are expected to be improved with continuous information of 3D weather cube. However, due to the nature of radiation, clouds prevent an adequate retrieval of atmospheric thermodynamic information under clear‐sky conditions due to large uncertainties in the current radiative transfer model. Removing cloud effects from GeoHIS sub‐footprint is an alternative approach for enhancing clear radiance generation. Such cloud removal can be achieved through the optimal cloud‐clearing (OCC) method, which usually relies on the assumption of atmospheric spatial homogeneity. With high temporal resolution observations from GeoHIS, cloud removal can also be achieved through OCC but using the assumption of temporal homogeneity. This concept was demonstrated using 15‐min Geostationary Interferometric Infrared Sounder (GIIRS) observations. The longwave GIIRS clear radiances under partially cloud cover can be effectively produced with observation errors less than 0.02 ± 0.86 K and 0.04 ± 0.77 K for 11 and 12 μm, respectively.

show abstract

Section: Introductionmentioning

confidence: 99%