Atmospheric polarization: Difference between revisions
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Polarization in the [[clear]] daytime sky can be quantified by the degree of [[linear]] polarization ''P'' and by the vibration ellipse orientation for [[skylight]]'s polarized component.<br/> For Stokes's parameters, ''I'' (the [[scattered]] irradiance), ''Q'', ''U'', and ''V'', skylight's linear polarization ''P'' is <blockquote>[[File:ams2001glos-Ae29.gif|link=|center|ams2001glos-Ae29]]</blockquote> thus ignoring its minimal degree of [[circular polarization]], [[File:ams2001glos-Aex06.gif|link=|ams2001glos-Aex06]]. ''P'' is zero at neutral points and has local maxima along a celestial [[great circle]] that is ∼90° from the sun. At [[sunrise]] and [[sunset]], this great circle is a sky meridian perpendicular to the [[clear sky]]'s [[principal plane]]. | |||
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Revision as of 16:39, 7 November 2023
Polarization in the clear daytime sky can be quantified by the degree of linear polarization P and by the vibration ellipse orientation for skylight's polarized component.
For Stokes's parameters, I (the scattered irradiance), Q, U, and V, skylight's linear polarization P is
. P is zero at neutral points and has local maxima along a celestial great circle that is ∼90° from the sun. At sunrise and sunset, this great circle is a sky meridian perpendicular to the clear sky's principal plane.
For Stokes's parameters, I (the scattered irradiance), Q, U, and V, skylight's linear polarization P is
thus ignoring its minimal degree of circular polarization,
. P is zero at neutral points and has local maxima along a celestial great circle that is ∼90° from the sun. At sunrise and sunset, this great circle is a sky meridian perpendicular to the clear sky's principal plane.
