INTERFEROMETRIC SIGNAL PROCESSING
First Claim
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1. A method of error handling in interferometric signal processing for a ground based slope monitoring system by:
- selecting a relatively stable reference;
extracting uncorrected movement data from interferometric radar measurements of the relatively stable reference;
correcting the uncorrected movement data for changes in atmospheric conditions by;
estimating change in a radar signal speed due to changes in a refractive index of the air; and
estimating an offset induced at zero range;
and displaying the corrected movement data.
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Abstract
Systems and methods of error handling in interferometric signal processing for a ground based slope monitoring system are described. Uncorrected movement data is extracted from interferometric radar measurements of a relatively stable reference. The movement data is corrected for changes in atmospheric conditions as a function of changes in a refractive index of the air and an offset induced at zero range.
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Citations
22 Claims
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1. A method of error handling in interferometric signal processing for a ground based slope monitoring system by:
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selecting a relatively stable reference; extracting uncorrected movement data from interferometric radar measurements of the relatively stable reference; correcting the uncorrected movement data for changes in atmospheric conditions by; estimating change in a radar signal speed due to changes in a refractive index of the air; and estimating an offset induced at zero range; and displaying the corrected movement data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. An anomaly detection and correction module for a ground based radar slope monitoring system comprising:
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an atmospheric correction module comprising a processor programmed to correct slope movement measurements obtained using interferometric signal processing for anomalies caused by atmospheric changes; and a disturbance detection module comprising a processor programmed to identify disturbances that cause errors in the slope movement measurements. - View Dependent Claims (15, 16)
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17. A method of atmospheric correction of movement data comprising multiple data points in a ground based slope monitoring system by:
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selecting at least one atmospheric correction region; deducing displacement data within the selected region; determining a search space; calculating a cost function for a grid of points within the search space; using a minimisation algorithm to determine an interferometric signal processing correction slope and offset; and applying the interferometric signal processing correction slope and offset to the movement data. - View Dependent Claims (18)
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19. A ground based slope monitoring system of the type comprising at least a radar module generating interferometric movement measurements of a slope further comprising:
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an atmospheric correction module that corrects slope movement measurements for anomalies caused by atmospheric changes by; selecting a relatively stable reference; extracting uncorrected movement data from interferometric radar measurements of the relatively stable reference; correcting the uncorrected movement data for changes in atmospheric conditions by; estimating change in a radar signal speed due to changes in a refractive index of the air; and estimating an offset induced at zero range. - View Dependent Claims (20, 21, 22)
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Specification