A prototype algorithm for all-sky atmospheric temperature profile retrieval over ocean based on channel optimization for the FY-4M satellite

Wang, Yu; Ma, Xinbin; Wu, Banghai; Guo, Qiang; Xi, Jing; Li, Rui; Wang, Xin; Li, Xiaoqing

doi:10.5194/amt-19-6553-2026

Articles | Volume 19, issue 20

https://doi.org/10.5194/amt-19-6553-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/amt-19-6553-2026

© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 19, issue 20

Research article

|

19 Oct 2026

Research article |

| 19 Oct 2026

A prototype algorithm for all-sky atmospheric temperature profile retrieval over ocean based on channel optimization for the FY-4M satellite

Yu Wang, Xinbin Ma, Banghai Wu, Qiang Guo, Jing Xi, Rui Li, Xin Wang, and Xiaoqing Li

Data sets

ERA5 hourly data on pressure levels from 1940 to present Copernicus Climate Change Service, Climate Data Store https://doi.org/10.24381/cds.bd0915c6

ERA5 hourly data on single levels from 1940 to present Copernicus Climate Change Service, Climate Data Store https://doi.org/10.24381/cds.adbb2d47

GPM GMI_R Common Calibrated Brightness Temperatures Collocated L1C 1.5 h 13 km V05 Wesley Berg https://doi.org/10.5067/GPM/GMI/R/1C/05

GPM GMI (GPROF) Climate-based Radiometer Precipitation Profiling L2A 1.5 h 4 km x 4 km V07 Christian Kummerow https://doi.org/10.5067/GPM/GMI/GPROFCLIM/2A/07

Short summary

China’s Fengyun-4M, planned for launch in late 2026, will be the first geostationary satellite to carry a passive microwave instrument, opening a new era of weather observation. To better use its more than one hundred channels, we developed a retrieval method and an optimized channel setup for all-sky temperature profile retrieval over ocean. The results indicate that this algorithm shows low errors while reducing computing time, which is a preferred choice for future operational use.