one is the definition of the observation zenith angle,and the other is treating the Solar Zenith Angle as a variable along the LOS direction.With this method,wedoi:10.1002/cjg2.20099Yong-Chao, ZHANGFei, HEXiao-
24.1 degrees. This is just over one-fourth of the distance from the horizon to the zenith. Step 4: Factor in the Declination for Today The variation owing to the Earth's tilt is called the declination. It is a positive number in the spring and summer and a negative number in the fall...
However, the empirical formula method is not reasonable, and the calculated sky scattered light ratio is easily affected by the solar zenith angle. Therefore, some studies have improved the empirical formula method and adopted a broadband method to consider the influence of atmospheric scattering ...