Analysis on the Influence Factors to Atmospheric Polarization Navigation

Ou, Yawen; Wu, Pengfei; Tang, Chaoli; Wei, Heli

doi:10.1007/978-981-10-0937-2_49

Cited by 2 publications

(2 citation statements)

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“…So the first part of S inc is the straight incident light of the Sun S Sun . According to previous studies and our simulation results, after scattering, the degree of polarization (DOP) will decrease [6], and the directions of light would be all directions after scattered. Thus, there should be a uniform direction part of S inc , which is S uni , causing the decrease of DOP.…”

Section: Calculate By Equivalent Incident Lightsupporting

confidence: 72%

“…For decades, many researchers were working on using polarization pattern of scattered light of sunlight for navigation. Most research was below the scope of Rayleigh single scattering [5][6][7], while for turbid atmosphere in which most observation light is multiple scattering light, Rayleigh single scattering model can be imprecise. To adapt to complex weather conditions, a common strategy used in literature is to find the solar meridian by the symmetry of polarization pattern [8].…”

Section: Introductionmentioning

confidence: 99%

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An equivalent incident light model for multiple scattering and polarization neutral point of skylight

Wang¹,

Qian²,

Guo³

2020

J. Opt.

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The symmetry breaking in the skylight polarization pattern is caused by the shape of the atmosphere and multi-scattering. We analyzed the physical processes of multi-scattering and found out that when neutral points split from two into four there should be an altitude shift of the center of polarization pattern. The altitude shift could be positively related to the split angle of the neutral point, which would reduce the accuracy of polarization navigation based on the single scattering model. To quantify the positive relationship which is useful for error correction in navigation, the Monte-Carlo method was used to simulate the multiple scattering processes of sunlight. The simulation results show that the split angle of the neutral point is in direct proportion to the altitude shift angle. Experimental data from Horvath also show the proportional relation. According to the simulation results and experimental data, an equivalent incident light model was established to explain the proportional relation which could be used in sunlight navigation.

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Section: Calculate By Equivalent Incident Lightsupporting

confidence: 72%