sunset
The sunset function determines the Coordinated Universal Time when the sun just sets below the horizon.
Daylight
sunrise
The sunrise function determines the Coordinated Universal Time when the sun just rises above the horizon.
sundiagram
The sundiagram function creates an illustration of the sun path over the year for a specific geographic location.
suntime
The suntime function calculates the Coordinated Universal Time or local time for a given sun position and geographic location.
specsky
Creates spectral radiance data for a Tregenza hemisphere with 145 patches for CIE sky types 3 and 12
plotpolarCCT
Calculates and plots the resulting horizontal and vertical Correlated Colour Temperatures from the Tregenza luminance distribution with 145 patches
plotpolarE
Calculates the resulting horizontal and vertical illuminances for a given Tregenza luminance distribution with 145 patches
sunpos
Calculates the sun position according to DIN EN 17037 from UTC
getskytype
Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere
ciesky
Calculates the corresponding luminance distribution for a Tregenza hemisphere with 145 patches according to the CIE procedure described in ISO 15469
cieedq
Determines the α-opic equivalent daylight D65 quantity for a given spectrum
ciemedi
Determines the melanopic equivalent daylight D65 illuminance for a given spectrum
tregenzadist
Determines the nearest neighbour patches and the angular distance to a given tregenza hemisphere patch
TST
Calculates the True Solar Time (TST) according to DIN EN 17037 from Coordinated Universal Time (UTC)
tregenzaskytype
Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere
polardataCCT
Calculates the resulting horizontal and vertical Correlated Colour Temperatures from the Tregenza radiance distribution with 145 patches and the colour coordinates x and y
south
Returns the (UTC) for True Solar Time (TST) 12:00 according to DIN EN 17037
kobavskytype
Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere as described by Kobav et al.
polardataE
Calculates the resulting horizontal and vertical illuminances for a given Tregenza luminance distribution
plotskydirecto
Creates a directogram plot of a Tregenza sky hemisphere