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Published on: August 5, 2009
Summary
Centroid fluctuations in laser-imaged targets are statistically described. These fluctuations limit remote sensing accuracy, regardless of linear filtering, due to illumination and imaging geometries.
Area of Science:
- Optics and Photonics
- Remote Sensing
- Statistical Physics
Background:
- Coherent illumination of targets can lead to fluctuations in the centroid of the imaged object.
- Understanding these fluctuations is crucial for accurate remote sensing applications.
Purpose of the Study:
- To provide a statistical description of centroid fluctuations under coherent illumination.
- To derive analytic expressions for these fluctuations considering illumination and imaging geometries.
- To assess the impact of linear filtering on these fluctuations and their implications for remote sensing.
Main Methods:
- Statistical analysis of centroid fluctuations.
- Derivation of analytic expressions based on illumination and imaging parameters.
- Investigation of the effect of linear filtering on fluctuation characteristics.
Main Results:
- Developed a statistical framework for describing centroid fluctuations.
- Derived analytic expressions that accurately model the fluctuations.
- Demonstrated that fluctuations are insensitive to linear filtering.
Conclusions:
- Centroid fluctuations present a fundamental physical limitation for laser-based remote sensing devices.
- The derived analytic expressions offer a basis for understanding and potentially mitigating these limitations.
- Future remote sensing system designs must account for these inherent fluctuation characteristics.
