Project plan and research on data analysis and processing technology of geophysical exploration satellite and application research of earthquake prediction

Earthquake monitoring and prediction is one of the most difficult problems in earth science and related disciplines, and it is a scientific problem that concerns the safety of human society, national economy and people’s livelihood. In order to further improve the scientific research level of earthquake prediction and promote the construction of earthquake monitoring and prediction ability, the strategic development idea of three-dimensional seismic observation system was put forward in China at the turn of the century. It is hoped to break through the bottleneck of 3D geophysical field acquisition ability, develop the earth multi-layer coupling model, and obtain the earthquake case information of global large earthquakes through satellite observation, so as to effectively promote the scientific exploration of earthquake monitoring and prediction. As a space-based platform, geophysical satellite exploration has become a new and important direction in the scientific exploration of three-dimensional seismic monitoring and prediction. In February 2018, China’s first geophysical field satellite, electromagnetic monitoring and experimental satellite ZH1(01) was successfully launched into orbit and passed the in-orbit test. At present, the electromagnetic satellite data processing technology and the ionospheric modeling technology in China is close to the international parallel state. However, the gravity satellite data processing is still in the tracking research stage, the global geomagnetic field modeling is in the initial stage, and the multi-parameter comprehensive analysis of geophysical field coupled by multiple layers needs to be further studied. In view of the above scientific problems, the project has carried out researches on spaceborne electromagnetic field, ionospheric data processing and calibration technology, satellite load field data processing technology, global/regional geophysical field fine modeling technology, geophysical field multi-parameter comprehensive analysis and seismic anomaly identification technology. Through research, this project implements the corresponding algorithm and the module of research and development and the global geophysical field model is established. The main characteristics of earthquake cases library and sample library construct the satellite monitoring earthquake prediction application platform, complete the global and China’s earthquake cases accumulation, and predicting earthquake monitoring application demonstration in the Sichuan-Yunnan region and earthquake track inspection, demonstrate significant results were obtained in the application. The main achievements are as follows: three new technologies have been obtained: ① high-precision three-frequency beacon ionospheric inversion technology; ② VLF wave FDTD propagation model; ③ fine processing technology of satellite gravity gradiometry data. Three new methods were proposed: ① optimization processing method of high-precision magnetic field data; ② satellite magnetic disturbance signal extraction algorithm; ③ satellite multi-parameter comprehensive analysis method. Three new products were produced: ① global main magnetic field model. This model was successfully incorporated into IGRF2020.0, which is the first model for global geophysical field modeling in China; ② global three-dimensional ionospheric electron density model; ③ global time-varying gravity field model. One theory have been proposed: multi-source heterogeneous seismic anomaly information fusion and anomaly recognition. A new platform is developed: satellite seismic monitoring and prediction application platform.