Chinese Integrated Meteorological Observation Network for FY Satellite Validation

There are 9 Fengyun (FY) meteorological satellites on the orbit to obtain the global meteorological observation data. The validation is fundamental for satellite product and the quantitative application. At present, China Meteorological Administration (CMA) maintains the huge ground-based meteorological observation network with nearly 80,000 sets of ground-based equipment spanning over 340 types to measure over 100 items of meteorological parameters. This network provides the independent means to assess the accuracy of the data products derived from the FY satellites. An operation-oriented validation system for FY-3 polar orbiting satellites has been designed and established since 2022. This system is named as the Integrated Space-Ground System for Calibration and Validation (ISGS4CV).

The objective of ISGS4CV is to assess the FY satellite products routinely and to generate the integrated dataset by data fusion as well. With the data fusion, ISGS4CV can generate the integrated dataset to better describe the digital Earth. The new dataset will inherit the advantages of the space-based measurement in spatiotemporal resolution and the ground-based measurement in high accuracy. The current CMA ground-based meteorological observation network will be selected to support ISGS4CV. For example, the surface network, the upper-air network, the new generation weather radar network, the atmospheric composition network, the ground-based remote sensing network, and the airborne observation system and field campaigns will be included.