Rainfall inversion method based on synthetic aperture radar

A synthetic aperture radar and radar technology, which is applied in the directions of rainfall/precipitation meter, reflection/re-radiation of radio waves, and utilization of re-radiation, etc. Small volume and high precision
CN113325418AActive Publication Date: 2021-08-31SHANGHAI OCEAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHANGHAI OCEAN UNIV
Publication Date
2021-08-31

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Abstract

The invention provides a rainfall inversion method based on a synthetic aperture radar. The rainfall inversion method comprises the following steps: S1, obtaining an original spaceborne SAR image and rainfall data measured by a TRMM satellite, and calculating to obtain a normalized radar back scattering cross section value of the original spaceborne SAR image; S2, using the improved composite surface radar backscattering model based on the Bragg scattering theory to simulate and obtain a simulated normalized radar backscattering cross section value; S3, determining a relationship between a difference value between the normalized radar backscattering cross section value and the simulated normalized radar backscattering cross section value and the rainfall capacity; and S4, constructing an inversion algorithm. The rainfall inversion method based on the synthetic aperture radar is high in precision and small in calculation amount.
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Description

technical field

[0001] The invention relates to the technical field of synthetic aperture radar, in particular to a rainfall retrieval method based on synthetic aperture radar. Background technique

[0002] In daily life, the impact of rainfall on human beings is ubiquitous. The location and time of rainfall distribution directly affect the ability of human beings to utilize fresh water resources and directly affect the quality of human life. The extreme rainfall weather accompanied by hurricanes, blizzards, floods, droughts and landslides has seriously affected the survival and development of human society. The observation of rainfall has been an important part of meteorology and hydrology throughout human history. Management of water resources such as agricultural irrigation, flood control, drought response, and freshwater supply all require accurate observation and forecasting of rainfall. Rainfall is not only crucial for water resources, but also plays an important ro...

Claims

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