Airport deformation monitoring method of multi-feature scatterer based on amplitude intensity

Abstract

The invention discloses an airport deformation monitoring method for a multi-feature scatterer based on amplitude intensity, and the method comprises the steps: obtaining SAR image data of which space-time baselines meet a threshold value in SAR image data, generating interference pairs, carrying out the coherence estimation of the generated interference pairs, determining a coherence threshold value, dividing a low-coherence region, and carrying out the detection of the low-coherence region. The method comprises the following steps: arranging an artificial corner reflector in a low-coherence area, obtaining a backscattering coefficient amplitude deviation coefficient and an amplitude mean coefficient, taking the amplitude deviation coefficient as a scatterer primary selection threshold value, obtaining a large number of primary selection earth surface scatterers, obtaining deformation information of the primary selection earth surface scatterers, taking the amplitude mean coefficient as a selection threshold value of a correction point, and obtaining the correction point. A certain number of correction points are obtained, networking is carried out on the obtained correction points and the adjacent primarily-selected surface scatterer with similar coherence, indirect adjustment is carried out on the correction points and the primarily-selected surface scatterer, and regional high-precision deformation information is obtained. The method can overcome the influence of regional incoherence on precision, and is high in efficiency and extremely low in cost.

Description

technical field [0001] The invention relates to the technical field of deformation monitoring, and more specifically relates to an airport deformation monitoring method based on amplitude-strength multi-feature scatterers. Background technique [0002] With the implementation and advancement of the "National Comprehensive Three-dimensional Transportation Network Planning Outline", a large number of mountain feeder airports have been built in mountainous areas of our country. Due to the complex geological conditions in mountainous areas, airport deformation monitoring and stability analysis have gradually become hot issues. [0003] At present, there are GNSS measurement, leveling and layered calibration technologies for surface deformation monitoring in mountainous airport areas. The above technical solutions can obtain discrete and high-precision point position deformation variables, but due to their high labor and equipment costs, they are affected by terrain factors. It i...

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Problems solved by technology

[0003] At present, there are GNSS measurement, leveling and layered calibration technologies for surface deformation monitoring methods in mountainous airport areas. The above technical solutions can obtain discrete and high-precision point position deformation variables, but due to their high labor and equipment costs, they are affected by terrain factors. It is restricted and difficult to obtain the large-area overall deformation distribution of the expansive soil area, so a high-precision, large-scale, long-period deformation monitoring technology is required

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