Articles | Volume 18, issue 20
https://doi.org/10.5194/amt-18-5591-2025
https://doi.org/10.5194/amt-18-5591-2025
Research article
 | 
21 Oct 2025
Research article |  | 21 Oct 2025

A bias correction scheme for FY-3E/HIRAS-II observation data assimilation

Hongtao Chen and Li Guan

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Cited articles

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Auligné, T., McNally, A. P., and Dee, D. P.: Adaptive bias correction for satellite data in a numerical weather prediction system, Q. J. Roy. Meteor. Soc., 133, 631–642, https://doi.org/10.1002/qj.56, 2007. 
Collard, A. D., and McNally, A. P.: The assimilation of Infrared Atmospheric Sounding Interferometer radiances at ECMWF, Q. J. Roy. Meteor. Soc., 135, 1044–1058, https://doi.org/10.1002/qj.410, 2009. 
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Copernicus Climate Change Service, Climate Data Store: ERA5 hourly data on pressure levels from 1940 to present [data set], Copernicus Climate Change Service (C3S) Climate Data Store (CDS), https://doi.org/10.24381/cds.adbb2d47, 2023. 
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Short summary
In order to correctly assimilate satellite radiance observations in data assimilation systems, the systematic observation biases must be corrected to conform to a Gaussian normal distribution with a mean of 0. In this paper, a two-step bias correction scheme is established based on radiation observations of HIRAS-II (Hyperspectral Infrared Atmospheric Sounder-II) carried on FY-3E.
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