Updates values individually not globally (diurnally)

Calculates log(lux) values for a give location, date, time and sky conditions along the track. Updates to the bearing direction of flight are only made for selected values.

individual(par, data, loc, ...)

Arguments

par

Three parameters specifying the illuminance model.

data

A data frame with the required drivers for the illuminance model.

loc

previous location

...

optional other parameters to forward

Value

Sky illuminance as log(lux).

Details

After a diurnal cycle the course is updated for the next, diurnal cycle. Processing uses a GMT time reference and large east-west movements might cut through the date line, hence updates along the flight track would not perfectly coincide with the end of a twilight phase.