Fig. 1
Description of the probabilistic algorithm. Timing of twilight events are either deduced from raw light data or extracted from logger specific software (a). Each set of twilight events is replicated by the number of particles and an uncertainty as well as a random solar angle are added to compute a cloud of possible locations (b). These calculated particle locations for a set of twilight events are weighted by any other chosen parameter (c). For each step one random particle based on their weights is chosen (d) and this process is repeated (e). The geographic median track is computed as most likely track and each modelled location has an estimated uncertainty based on all iterated tracks (f). This figure is modified after Figure 1 in [28]