From skylight input to behavioural output: A computational model of the insect polarised light compass
Fig 6
Using confidence of the estimate to compensate for time.
(A) The confidence value of the compass response varies with the solar elevation (black dots). Within the range 23° − 72° this relationship can be used to estimate the elevation using Eq (8) (red dots). (B) The rate of change of the solar azimuth over time depends on the elevation [coloured dots represent different times of the day from morning (blue) to the evening (red)] and can be approximated using Eq (9) (black line). (C) Showing the solar elevation with respect to the solar azimuth for different times of the year. Each of the 12 imaginary curves in B and C correspond to the 21st of every month; the sampling rate in each day is every 10 minutes from sunrise to sunset.