Ms. Wei Han Profile

Wei Han

at Chinese Academy of Meteorological Sciences

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 20 November 2024 Poster + Paper

Optimal cloud-clearing radiances for GIIRS onboard FengYun-4A satellite

Xinya Gong, Jun Li, Zhenglong Li, Ruoying Yin, Wei Han

Proceedings Volume 13193, 131930N (2024) https://doi.org/10.1117/12.3031422

KEYWORDS: Hyperspectral sensing, Weather forecasting, Clouds, Infrared imaging, Imaging systems, Satellites, Bias correction, Meteorological satellites, Infrared radiation, Spatial resolution

Read Abstract +

Geostationary Interferometric Infrared Sounder (GIIRS) onboard China's geostationary meteorological satellite of the Fengyun-4A satellite provides high-spectral-resolution infrared observations with high temporal resolution. Due to high uncertainties in radiative transfer modeling of cloudy radiances, it is challenging to take full advantages of thermodynamic information from GIIRS in all sky. Advanced Geostationary Radiation Imager (AGRI) onboard the same platform provides a variety of cloud products with high spatial resolution. A bias corrected optimal cloud-cleared (BCOCC) method is introduced to generate the GIIRS cloud-cleared radiances (CCRs) with the help of the collocated clear radiances of AGRI. A bias correction (BC) scheme is applied by adjusting radiance differences between AGRI and GIIRS based on field-of-view and scene temperature. This correction ensures radiometric consistency across multiple bands and minimizes errors in CCR generation. Comparing to the optimal cloud-cleared method without BC, BCOCC increases the data yields of successful GIIRS CCRs by three times and improves the accuracy of retrieved CCRs. Evaluations show the mean biases of CCRs are 0.09K, -0.06K, and 0.06K, when compared to AGRI IR bands B12, B13 and B14, respectively. The GIIRS CCRs can be assimilated as clear radiances in numerical weather prediction (NWP) models, leading to enhanced forecast accuracy, particularly in regions of cloud edges and broken clouds, such as during typhoon or hurricane formation. Future work will involve integrating these CCRs into operational NWP systems and quantifying the improvement in forecast skill, particularly for severe weather events.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years