InSAR digital elevation model construction method and system based on dynamic baseline

A technology of digital elevation model and dynamic baseline, applied in radio wave measurement system, radio wave reflection/re-radiation, instruments, etc., can solve the problems of large error and high cost, and achieve the effect of low cost and high precision

Inactive Publication Date: 2020-08-14
SHENZHEN UNIV
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Problems solved by technology

[0006] Based on this, it is necessary to provide a dynamic baseline-based InSAR digital elevation model construction method and system for the technical problems of DEM null values ​​caused by space-time loss of coherence, high cost, and large errors in the prior art. Construct a dynamic baseline calcu

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  • InSAR digital elevation model construction method and system based on dynamic baseline
  • InSAR digital elevation model construction method and system based on dynamic baseline
  • InSAR digital elevation model construction method and system based on dynamic baseline

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[0050] In order to make the object, technical solution and effect of the present invention more clear and definite, the present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0051] see figure 1 , figure 1 It is a flowchart of a dynamic baseline-based InSAR digital elevation model construction method provided by the present invention. It should be noted that the dynamic baseline-based InSAR digital elevation model construction method of the present invention is not limited to figure 1 The steps and sequence in the flow chart are shown. According to different requirements, the steps in the flow chart can be added, removed or changed in order.

[0052] like figure 1 As shown, the InSAR digital elevation model building method based on dynamic baseline provided by th

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Abstract

The invention discloses an InSAR digital elevation model construction method and system based on a dynamic baseline. The method comprises the steps: acquiring the SAR data of orbit ascending and orbitdescending respectively; performing registration, difference, filtering and unwrapping processing on the SAR data; constructing a dynamic baseline model to solve a used external DEM error, correctingand refining an original DEM by utilizing the error, and finally fusing DEM refining results of different orbits to obtain a high-precision DEM. According to the method, the dynamic baseline calculation model is constructed and applied to the InSAR data of orbit ascending and orbit descending, the DEM null value problem caused by space-time incoherence can be effectively restrained, high-precision DEM data can be achieved, the DEM error of any SAR data time period can be calculated, the cost is low, and convenience is brought to a user.

Description

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Claims

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Application Information

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Owner SHENZHEN UNIV
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