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- Rayleigh_sky_model abstract "The Rayleigh sky model describes the observed polarization pattern of the daytime sky. Within the atmosphere Rayleigh scattering of light from air molecules, water, dust, and aerosols causes the sky's light to have a defined polarization pattern. The same elastic scattering processes cause the sky to be blue. The polarization is characterized at each wavelength by its degree of polarization, and orientation (the e-vector angle, or scattering angle).The polarization pattern of the sky is dependent on the celestial position of the sun. While all scattered light is polarized to some extent, light is highly polarized at a scattering angle of 90° from the light source. In most cases the light source is the sun, but the moon creates the same pattern as well. The degree of polarization first increases with increasing distance from the sun, and then decreases toward the anti-sun. Thus, the maximum degree of polarization occurs in a circular band 90° from the sun. In this band, degrees of polarization near 80% are typically reached.When the sun is located at the zenith, the band of maximal polarization wraps around the horizon. Light from the sky is polarized horizontally along the horizon. During twilight at either the Vernal or Autumnal equinox, the band of maximal polarization is defined by the North-Zenith-South plane, or meridian. In particular, the polarization is vertical at the horizon in the North and South, where the meridian meets the horizon. The polarization at twilight at an equinox is represented by the figure to the right. The red band represents the circle in the North-Zenith-South plane where the sky is highly polarized. The cardinal directions N, E, S, W are shown at 12-o'clock, 9 o'clock, 6 o'clock and 3 o'clock (counter-clockwise around the celestial sphere since the observer is looking up at the sky).Note that because the polarization pattern is dependent on the sun, it changes not only throughout the day but throughout the year. When the sun sets toward the South, in the winter, the North-Zenith-South plane is offset, with "effective" North actually located somewhat toward the West. Thus if the sun sets at an azimuth of 255° (15° South of West) the polarization pattern will be at its maximum along the horizon at an azimuth of 345° (15° West of North) and 165° (15° East of South).During a single day, the pattern rotates with the changing position of the sun. At twilight it typically appears about 45 minutes before local sunrise and disappears 45 minutes after local sunset. Once established it is very stable, showing change only in its rotation. It can easily be seen on any given day using polarized sunglasses.Many animals use the polarization patterns of the sky at twilight and throughout the day as a navigation tool. Because it is determined purely by the position of the sun, it is easily used as a compass for animal orientation. By orienting themselves with respect to the polarization patterns, animals can locate the sun and thus determine the cardinal directions.".
- Rayleigh_sky_model thumbnail Degpolred.jpg?width=300.
- Rayleigh_sky_model wikiPageExternalLink blusky.html.
- Rayleigh_sky_model wikiPageExternalLink polarization.com.
- Rayleigh_sky_model wikiPageExternalLink sky.html.
- Rayleigh_sky_model wikiPageID "28376129".
- Rayleigh_sky_model wikiPageLength "26621".
- Rayleigh_sky_model wikiPageOutDegree "53".
- Rayleigh_sky_model wikiPageRevisionID "663520508".
- Rayleigh_sky_model wikiPageWikiLink Aerosol.
- Rayleigh_sky_model wikiPageWikiLink Animal_navigation.
- Rayleigh_sky_model wikiPageWikiLink Azimuth.
- Rayleigh_sky_model wikiPageWikiLink Birefringence.
- Rayleigh_sky_model wikiPageWikiLink Brewsters_angle.
- Rayleigh_sky_model wikiPageWikiLink Cardinal_direction.
- Rayleigh_sky_model wikiPageWikiLink Category:Atmospheric_optical_phenomena.
- Rayleigh_sky_model wikiPageWikiLink Category:Polarization_(waves).
- Rayleigh_sky_model wikiPageWikiLink Celestial_coordinate_system.
- Rayleigh_sky_model wikiPageWikiLink Celestial_sphere.
- Rayleigh_sky_model wikiPageWikiLink Degree_of_polarization.
- Rayleigh_sky_model wikiPageWikiLink Diffuse_sky_radiation.
- Rayleigh_sky_model wikiPageWikiLink Elastic_scattering.
- Rayleigh_sky_model wikiPageWikiLink Emission_spectrum.
- Rayleigh_sky_model wikiPageWikiLink Equinox.
- Rayleigh_sky_model wikiPageWikiLink Halictidae.
- Rayleigh_sky_model wikiPageWikiLink Horizon.
- Rayleigh_sky_model wikiPageWikiLink Iceland_spar.
- Rayleigh_sky_model wikiPageWikiLink Intensity_(physics).
- Rayleigh_sky_model wikiPageWikiLink Karl_von_Frisch.
- Rayleigh_sky_model wikiPageWikiLink Law_of_cosines.
- Rayleigh_sky_model wikiPageWikiLink Light.
- Rayleigh_sky_model wikiPageWikiLink Light_pollution.
- Rayleigh_sky_model wikiPageWikiLink Meridian_(astronomy).
- Rayleigh_sky_model wikiPageWikiLink Molecule.
- Rayleigh_sky_model wikiPageWikiLink Photoreceptor_cell.
- Rayleigh_sky_model wikiPageWikiLink Polarization_(waves).
- Rayleigh_sky_model wikiPageWikiLink Rainforest.
- Rayleigh_sky_model wikiPageWikiLink Rayleigh_scattering.
- Rayleigh_sky_model wikiPageWikiLink Reflection_(physics).
- Rayleigh_sky_model wikiPageWikiLink Remote_sensing.
- Rayleigh_sky_model wikiPageWikiLink Scattering.
- Rayleigh_sky_model wikiPageWikiLink Sky.
- Rayleigh_sky_model wikiPageWikiLink Stokes_parameters.
- Rayleigh_sky_model wikiPageWikiLink Twilight.
- Rayleigh_sky_model wikiPageWikiLink Urban_area.
- Rayleigh_sky_model wikiPageWikiLink Viking.
- Rayleigh_sky_model wikiPageWikiLink Vikings.
- Rayleigh_sky_model wikiPageWikiLink Wavelength.
- Rayleigh_sky_model wikiPageWikiLink Zenith.
- Rayleigh_sky_model wikiPageWikiLink File:Degpolred.jpg.
- Rayleigh_sky_model wikiPageWikiLink File:Effect_of_light_pollution_on_sky_polarization.jpg.
- Rayleigh_sky_model wikiPageWikiLink File:Horizon.png.
- Rayleigh_sky_model wikiPageWikiLink File:Mapang-ortho.gif.
- Rayleigh_sky_model wikiPageWikiLink File:Mapdeg-ortho.gif.
- Rayleigh_sky_model wikiPageWikiLink File:Mapqin-ortho.gif.
- Rayleigh_sky_model wikiPageWikiLink File:Mapuin-ortho.gif.
- Rayleigh_sky_model wikiPageWikiLink File:Pol_horizon.png.
- Rayleigh_sky_model wikiPageWikiLink File:Rayleigh-geometry.pdf.
- Rayleigh_sky_model wikiPageWikiLink File:Skydeg-alt-azi.png.
- Rayleigh_sky_model wikiPageWikiLink File:Solang_ztelan_stelan.jpg.
- Rayleigh_sky_model wikiPageWikiLink File:Soldis_zendis.jpg.
- Rayleigh_sky_model wikiPageWikiLinkText "Rayleigh sky model".
- Rayleigh_sky_model hasPhotoCollection Rayleigh_sky_model.
- Rayleigh_sky_model wikiPageUsesTemplate Template:Cleanup.
- Rayleigh_sky_model wikiPageUsesTemplate Template:Refbegin.
- Rayleigh_sky_model wikiPageUsesTemplate Template:Refend.
- Rayleigh_sky_model wikiPageUsesTemplate Template:Reflist.
- Rayleigh_sky_model subject Category:Atmospheric_optical_phenomena.
- Rayleigh_sky_model subject Category:Polarization_(waves).
- Rayleigh_sky_model type Article.
- Rayleigh_sky_model type Article.
- Rayleigh_sky_model type Astrophysic.
- Rayleigh_sky_model type Page.
- Rayleigh_sky_model comment "The Rayleigh sky model describes the observed polarization pattern of the daytime sky. Within the atmosphere Rayleigh scattering of light from air molecules, water, dust, and aerosols causes the sky's light to have a defined polarization pattern. The same elastic scattering processes cause the sky to be blue.".
- Rayleigh_sky_model label "Rayleigh sky model".
- Rayleigh_sky_model sameAs m.0cz83mg.
- Rayleigh_sky_model sameAs Q7298490.
- Rayleigh_sky_model sameAs Q7298490.
- Rayleigh_sky_model wasDerivedFrom Rayleigh_sky_model?oldid=663520508.
- Rayleigh_sky_model depiction Degpolred.jpg.
- Rayleigh_sky_model isPrimaryTopicOf Rayleigh_sky_model.