20230091343. METHOD FOR CALCULATING SENSITIVITY OF DISPLACEMENT OF SAR ALONG LINE-OF-SIGHT DIRECTION TO SLOPE GRADIENT AND SLOPE ASPECT simplified abstract (Chengdu University of Technology)

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METHOD FOR CALCULATING SENSITIVITY OF DISPLACEMENT OF SAR ALONG LINE-OF-SIGHT DIRECTION TO SLOPE GRADIENT AND SLOPE ASPECT

Organization Name

Chengdu University of Technology

Inventor(s)

Xianlin Shi of Chengdu City (CN)

Keren Dai of Chengdu City (CN)

Jin Deng of Chengdu City (CN)

METHOD FOR CALCULATING SENSITIVITY OF DISPLACEMENT OF SAR ALONG LINE-OF-SIGHT DIRECTION TO SLOPE GRADIENT AND SLOPE ASPECT - A simplified explanation of the abstract

This abstract first appeared for US patent application 20230091343 titled 'METHOD FOR CALCULATING SENSITIVITY OF DISPLACEMENT OF SAR ALONG LINE-OF-SIGHT DIRECTION TO SLOPE GRADIENT AND SLOPE ASPECT

Simplified Explanation

The patent application describes a method for calculating the sensitivity of a synthetic aperture radar (SAR) displacement along the line-of-sight direction to slope gradient and slope aspect. Here is a simplified explanation of the abstract:

  • The method involves obtaining SAR data and digital elevation model (DEM) data that cover slope bodies.
  • The local incident angle of an image is extracted using a satellite side-looking imaging principle.
  • Geometric distortion is applied to the slope bodies under ascending and descending orbits using the local incident angle.
  • Specific locations of geometric distortion areas are determined for both ascending and descending orbits.
  • Sensitivities of detections to changes in slope gradient and slope aspect are calculated for both orbits based on parameter information of the SAR satellite and satellite heights.
  • The sensitivity distribution is divided by combining the sensitivity and the specific locations of geometric distortion.

Potential applications of this technology:

  • Geographical mapping and analysis of slope bodies.
  • Monitoring and analysis of changes in slope gradient and slope aspect.
  • Identification of potential landslide areas.
  • Assessment of terrain stability for infrastructure planning.

Problems solved by this technology:

  • Accurate calculation of sensitivity to slope gradient and slope aspect in SAR displacement.
  • Overcoming geometric distortion caused by satellite orbits.
  • Improving the precision of SAR data analysis for slope bodies.

Benefits of this technology:

  • Enhanced accuracy in analyzing SAR data for slope bodies.
  • Improved understanding of slope characteristics and changes.
  • Early detection and monitoring of potential slope instability.
  • Better decision-making for infrastructure planning and risk assessment.


Original Abstract Submitted

a method for calculating a sensitivity of a displacement of synthetic aperture radar (sar) along line-of-sight direction to a slope gradient and a slope aspect is provided, comprising: obtaining sar data and digital elevation model (dem) data covering slope bodies, and extracting a local incident angle of an image by utilizing a satellite side-looking imaging principle; carrying out geometric distortion on the slope bodies under ascending and descending orbits by utilizing the local incident angle, to obtain specific locations of geometric distortion areas under ascending and descending orbit; calculating sensitivities of detections to changes of the slope gradient and the slope aspect under ascending and descending orbits according to the extracted parameter information of the sar satellite in ascending and descending orbits and satellite heights, and dividing a sensitivity distribution by combining the sensitivity and the specific locations of the geometric distortion.

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