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
