2 February 2009 Measurements of multi-angle polarization properties of the water-bearing yellow brown soil using multi-band polarimetric imagery in the laboratory
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Abstract
It is important for scientific agriculture to observing soil moisture content using remote sensing technique. Optical polarization remote sensing may be applied to soil moisture detection. There is a close relationship between soil surface moisture and its polarization property. The information of soil moisture content can be retrieved quantitatively according to the variation of polarization. In order to investigate the polarization properties of water-bearing soil, the yellow brown soil samples were collected in Hefei, Anhui, and measured in different phase angles under laboratory conditions. The incident angle of unpolarized beam was 40 degrees. The experiments of polarimetric imaging for the soil samples with different moisture content were made. The polarization image data were obtained using the multi-band polarized CCD camera. It was found that the degree of linear polarization (DOLP) of sample was inversely proportional to the viewing waveband. The DOLP increased with an increase of the phase angle before the percent moisture content of the samples reached 30% approximately. The DOLP reached the maximum with an increase of the phase angle when the soil samples were near saturated, saturated and oversaturated in soil moisture content. But the DOLP decreased with a further increase of the phase angle. The results indicate that the polarization properties of near saturated, saturated and oversaturated soil samples present the similar characteristics of Fresnel reflection. Obviously, the multi-angle and multi-band polarimetric imaging measurements for the water-bearing yellow brown soil provide an approach to monitor soil moisture using polarimetric imaging in airborne or satellite remote sensing.
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Xiaobing Sun, Xiaobing Sun, Jin Hong, Jin Hong, Yanli Qiao, Yanli Qiao, } "Measurements of multi-angle polarization properties of the water-bearing yellow brown soil using multi-band polarimetric imagery in the laboratory", Proc. SPIE 7160, 2008 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Applications, 71600V (2 February 2009); doi: 10.1117/12.816254; https://doi.org/10.1117/12.816254
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