Success rate s of simulated voyages using SPVN with calcite sunstones at spring equinox (21 March, A-B) and summer solstice (21 June, C-D) as a function of the navigation periodicity Δ t without (A, C) and with (B, D) night sailing.

Since the effect of sunstone type, cloudiness dominance m dominance and cloudiness changeability σ changeability was negligible on s , we did not sort the data for these variables when created this figure.

Bibliographic Details
Main Authors:	Péter Takács (563290), Dénes Száz (3943997), Ádám Pereszlényi (4575124), Gábor Horváth (3944000)
Format:	Still Image
Language:	unknown
Published:	2022
Subjects:	Cell Biology Neuroscience Physiology Evolutionary Biology Ecology Science Policy Environmental Sciences not elsewhere classified Astronomical and Space Sciences not elsewhere classified Biological Sciences not elsewhere classified Mathematical Sciences not elsewhere classified Information Systems not elsewhere classified viking voyages along following input data could successfully navigate computer simulations using 21 &# 8217 polarimetric viking navigation navigation steps measured also randomly changed following relevant sailing weakly cloudy skies sky imaging polarimetry greenland &# 8217 following intrinsic parameters navigation periodicity randomly varying sailing speed sailing date night sailing diurnal sailing weak influences visibility distance sunstone type sunny sky start time southeast coastline results show psychophysical laboratory planetarium experiments navigational parameters foggy conditions error functions earlier studies Greenland
Online Access:	https://doi.org/10.1371/journal.pone.0262762.g003

Description
Summary:	Since the effect of sunstone type, cloudiness dominance m dominance and cloudiness changeability σ changeability was negligible on s , we did not sort the data for these variables when created this figure.