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. Author manuscript; available in PMC: 2022 Feb 14.
Published in final edited form as: Appl Opt. 2019 Jun 1;58(16):4497–4511. doi: 10.1364/AO.58.004497

Fig. 4:

Fig. 4:

Shadow solid angle created by the two viewing geometries used in this study, θv = 0° and θv = 40°, at a ϕv = 90°. Inner to outer concentric circles represent zeniths of 15°, 40° and 90°. Data presented in stereographic projection (r = tan θ).