Interferometric Signal Processing
First Claim
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1. A method of error handling in interferometric signal processing for a slope monitoring system including the steps of:
- extracting uncorrected movement data from interferometric radar measurements;
correcting the movement data for changes in atmospheric conditions;
identifying disturbances in the corrected movement data; and
displaying the corrected movement data and regions affected by the disturbances.
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Abstract
A method of error handling in a slope monitoring system that generates slope movement data from interferometric signal processing of radar images of the slope monitoring system. The error handling occurs in two steps. The movement data is corrected for changes in atmospheric conditions and disturbances are identified. It is convenient to mask the regions identified as disturbed in the display of the corrected movement data. Typical disturbances include short term disturbances, such as trucks, and long term disturbances, such as vegetation.
27 Citations
19 Claims
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1. A method of error handling in interferometric signal processing for a slope monitoring system including the steps of:
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extracting uncorrected movement data from interferometric radar measurements; correcting the movement data for changes in atmospheric conditions; identifying disturbances in the corrected movement data; and displaying the corrected movement data and regions affected by the disturbances. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. An anomaly detection and correction module for a slope monitoring system comprising:
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an atmospheric correction module that corrects slope movement measurements for anomalies caused by atmospheric changes; and a disturbance detection module that identifies disturbances that cause errors in the slope movement measurements. - View Dependent Claims (12, 13)
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14. A method of atmospheric correction of movement data comprising multiple data points in a slope monitoring system including the steps of:
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selecting a plurality of atmospheric correction regions at different ranges; deducing displacement data within the selected regions; determining a search space; calculating a cost function for a grid of points within the search space; using a minimisation algorithm to determine a correction slope and offset; and applying the correction slope and offset to the movement data. - View Dependent Claims (15)
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16. A method of identifying disturbances of movement data comprising multiple data points in a slope monitoring system including the steps of:
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determining short-term coherence for each data point; averaging the short-term coherence to determine long-term coherence; comparing the long-term coherence to a first threshold and masking the data point if the long-term coherence is less than the first threshold; and comparing a ratio of the short-term coherence to the long-term coherence with a second threshold and masking the data point if the ratio is less than the second threshold. - View Dependent Claims (17)
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18. A slope monitoring system of the type comprising at least a radar module generating interferometric movement measurements of a slope further comprising an anomaly detection and correction module, the anomaly detection and correction module comprising:
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an atmospheric correction module that corrects slope movement measurements for anomalies caused by atmospheric changes; and a disturbance detection module that identifies disturbances that cause errors in the slope movement measurements. - View Dependent Claims (19)
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Specification