... polarization vision orientation polarization compass skylight polarization cloud cloudy sky full-sky imaging polarimetry ultraviolet vision. Many animals use the sun as a compass. If the sun is not visible (hidden by clouds or vegetation or landmarks, or positioned below the horizon), several...

... of polarization, respectively. The direct light from the sun (white disc) is unpolarized. SM and ASM, solar and antisolar meridian, respectively. The whole range of e-vector directions is distributed across the celestial hemisphere in an orderly way. Because skylight polarization arises from the scattering...