Publication Date:
2019-06-27
Description:
The dependence of the ratio of the diffuse to direct irradiances at the ground were examined for a wavelength of 315.1 nm. A passive remote sensing method based on ratio measurements for obtaining the optical thickness of SO2 in the vertical column was proposed. If, in addition to the ratio measurements, the SO2 density at the ground is determining using an appropriate point-sampling technique then some inference on the vertical extent of SO2 can be drawn. An analytic representation is presented of the ratio for a wide range of SO2 and aerosol optical thicknesses and solar zenith angles which can be inverted algebraically to give the SO2 optical thickness in terms of the measured ratio, aerosol optical thickness and solar zenith angle.
Keywords:
EARTH RESOURCES AND REMOTE SENSING
Type:
ERIM Proc. of the 11th Intern. Symp. on Remote Sensing of Environment, Vol. 1; p 525-533
Format:
text
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