| cc876 | Migrate Technology Ltd demo data |
| diurnal | Simulate diurnal illuminance value |
| individual | Updates values individually not globally (diurnally) |
| lakes | Lakes |
| land | Land area polygon |
| likelihood | Log likelihood cost function |
| read_deg_lux | Read lux and deg files |
| rivers | River lines |
| 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 |