Influence of Atmospheric Slant Path on Geostationary Hyperspectral Infrared Sounder Radiance Simulations
Abstract Accurately simulating a geostationary hyperspectral infrared sounder is critical for quantitative applications. Traditional radiation simulations of such instruments often overlook the influence of slant observation geometry by using vertical profile assumption, leading to inadequate simulation accuracy. By using global atmospheric profiles with 1 km spatial resolution, the slant‐path effects on brightness temperature simulations are quantified. Experiments indicate that the slant geometry has less impact on longwave brightness temperature simulations and has a substantial impact on middle‐wave brightness temperature simulations. It may introduce 0.5 K (or more) uncertainty to brightness temperatures of water vapor absorption channels when the satellite zenith angle is greater than 45°. Considering the slant profile is recommended for quantitative applications of geostationary hyperspectral sounder data, such as sounding retrieval and data assimilation.
Authors
- Di Di (ORCID: https://orcid.org/0000-0003-0475-9690)
- Myoung‐Hwan Ahn (ORCID: https://orcid.org/0000-0002-2044-5336)
- Valentine Anantharaj (ORCID: https://orcid.org/0000-0002-9356-1311)
- Zhenglong Li (ORCID: https://orcid.org/0000-0003-1737-735X)
- Min Min (ORCID: https://orcid.org/0000-0003-1519-5069)
- Pinbo Huang (ORCID: https://orcid.org/0000-0002-1191-6300)
- Jun Li (ORCID: https://orcid.org/0000-0001-5504-9627)
Institutions
- Oak Ridge National Laboratory (US)
- University of Wisconsin–Madison (US)
- Ewha Womans University (KR)
- China Meteorological Administration (CN)
- Sun Yat-sen University (CN)
- Nanjing University of Information Science and Technology (CN)
- Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (CN)
- Cooperative Institute for Climate and Satellites (US)
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) (CN)
Publication Details
- Journal
- Geophysical Research Letters
- Published
- 2024-11-29
- DOI
- https://doi.org/10.1029/2024gl110579
- Citations
- 3
- Primary Topic
- Meteorological Phenomena and Simulations
- Type
- article
- Field-Weighted Citation Impact
- 1.13
Funders
- U.S. Department of Energy
- National Natural Science Foundation of China
- Sun Yat-sen University
- Office of Science
- Science and Technology Planning Project of Guangdong Province