研究目的
Investigating the polarimetric effects on the propagation of radio occultations (ROs) for detecting heavy rain events using opportunity signals from GNSS satellites.
研究成果
The study demonstrates the feasibility of detecting precipitation events using polarimetric GNSS radio occultations, highlighting the importance of phase shift measurements. Dual-frequency methods are shown to effectively separate hydrometeor information from ionospheric effects.
研究不足
The study assumes negligible dichroism and focuses primarily on phase shifts. The impact of ice crystals and extreme ionospheric conditions may not be fully accounted for.
1：Experimental Design and Method Selection:
The study involves the analysis of polarimetric effects on GNSS radio occultations for precipitation sensing.
2：Sample Selection and Data Sources:
Utilizes GNSS opportunity signals and colocated precipitation information from the Tropical Rainfall Measuring Mission (TRMM) and Global Precipitation Measurement (GPM) satellites.
3：List of Experimental Equipment and Materials:
GNSS satellites, LEO satellite PAZ with a GNSS polarimetric instrument.
4：Experimental Procedures and Operational Workflow:
Analysis of polarimetric differential observables and development of algorithms for separation of precipitation-related parameters.
5：Data Analysis Methods:
Statistical analysis and simulation of polarimetric phase shifts and Faraday rotation effects.
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