Summary
This study uses photogrammetry to analyze the solar aureole for sky radiance measurements. This method helps determine aerosol physical characteristics from photographic data.
Area of Science:
- Atmospheric optics
- Photogrammetry
- Aerosol science
Background:
- Photographic sky radiance measurements are crucial for understanding atmospheric properties.
- Photogrammetry provides a framework for relating 3D object space to 2D image space.
- Reconstructing object space from image data is a key challenge in photogrammetry.
Purpose of the Study:
- To perform a photogrammetric analysis of the solar aureole.
- To enable photographic sky radiance measurements for aerosol characterization.
- To investigate the geometric projections of atmospheric features in sky images.
Main Methods:
- Applying photogrammetric principles to analyze solar aureole images.
- Utilizing photographic data to derive sky radiance values.
- Mathematical modeling of geometric projections in sky photography.
Main Results:
- Demonstrated that the almucantar projects as a conic section on the photographic plane.
- Showed that the sun vertical projects as a straight line in the analyzed images.
- Established a method for quantitative analysis of sky radiance using photogrammetry.
Conclusions:
- Photogrammetric analysis of the solar aureole is a viable technique for aerosol studies.
- The geometric properties of projected atmospheric features (almucantar, sun vertical) can be quantitatively determined.
- This approach offers a novel way to derive physical characteristics of aerosols from sky radiance measurements.
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