skytrackr2.0 package

A Sky Illuminance Location Tracker

diurnal

Simulate diurnal illuminance value

individual

Updates values individually not globally (diurnally)

likelihood

Log likelihood cost function

read_deg_lux

Read lux and deg files

skytrackr

Sky (illuminance) location estimation routine

stk_calibrate

Estimate scale the scale range

stk_center

Centers diurnal curves on midday

stk_cluster

Cluster geolocator co-variates

stk_filter

Filter twilight values by range

stk_fit

Fit illuminance (lux) profile

stk_map

Plot skytrackr results

stk_mask

Generate a land surface mask

stk_profile

Plot seasonal profiles

stk_read_glf

Read Swiss Ornithology institute GLF files

stk_read_lux

Read Migrate Technology .lux files

stk_screen_twl

Twilight screening routine

Download source packageRead PDF manual

Calculate geolocations by light using template matching. The routine uses a calibration free optimization of a sky illuminance model to determine locations robustly using a template matching approach, as described by Ekstrom (2004) <https://nipr.repo.nii.ac.jp/records/2496>, and behaviourly informed constraints (step-selection).

  • Maintainer: Koen Hufkens
  • License: AGPL-3
  • Last published: 2025-12-02

Useful links