Abstract
A physical retrieval algorithm has been developed for deriving the layered precipitable water vapor (LPWs) product from infrared radiances of the Advanced Geosynchronous Radiation Imager (AGRI) onboard FengYun-4A (FY-4A), the first of the new generation of Chinese geostationary weather satellites (FengYun-4, or FY-4 Series). The FY-4A AGRI LPWs are evaluated with different types of reference datasets based on Quality Control System (QCS), including those from Himawari-8 AHI (Advanced Himawari Imager), MODIS (Moderate Resolution Imaging Spectroradiometer), Radiosonde, ERA5 (European Centre for Medium-Range Weather Forecasts Reanalysis v5), NCEP (National Centers for Environmental Prediction) reanalysis and CMA (China Meteorological Administration) forecast product from global medium range numerical weather prediction (NWP) system. QCS is one of the important components of FY-4A ground segment, which mainly focuses on the satellite products’ evaluation and validation. It is found that the AGRI LPW product has a good agreement with different evaluating sources and the quality is favorable and stable. With the capability of frequent (5-min interval) observations over the East Asia and Western Pacific regions, the AGRI LPW products can be used to investigate the atmospheric temporal and spatial variations in the pre-landfall environment for typhoons. The QCS is a useful tool to monitor, evaluate, and validate the AGRI LPW products.
Highlights
Fengyun-4 (FY-4) is the latest generation of China’s geostationary meteorological satellites for high-impact weather (HIW) event monitoring, warning, and forecasting, with the first FY-4A launched on 11 December 2016 [1]
After data preprocessing and matching, the FY-4A Advanced Geosynchronous Radiation Imager (AGRI) layered precipitable water vapor (LPW) products are compared with the reference datasets for evaluation
Figures with statistical results are automatically generated from those evaluations and are continuously monitored to ensure the quality of the AGRI LPW products
Summary
Fengyun-4 (FY-4) is the latest generation of China’s geostationary meteorological satellites for high-impact weather (HIW) event monitoring, warning, and forecasting, with the first FY-4A launched on 11 December 2016 [1]. FY-2 series, the FY-4 series have a longer operating lifetime and improved capabilities for weather and environmental monitoring, including a new capability for vertical temperature and moisture sounding of the atmosphere with its high-spectral-resolution infrared (IR). FY-4 represents an unprecedented expansion in China’s geostationary remote sensing capabilities. FY-4A is experimental, and the subsequent satellites in the FY-4 series will be operational. For the FY-4 operational series of satellites, the main observation capabilities are similar to those onboard the FY-4A, with some significant performance improvements, such as more observation channels, finer spatial resolution, and higher observing frequency of the Advanced Geosynchronous
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
