frudawski

## sunset

The sunset function determines the Coordinated Universal Time when the sun just sets below the horizon.

## 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.

## 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

## 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

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)

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

## kobavskytype

Determines the CIE general standard sky type for a given luminance distribution of a Tregenza hemisphere as described by Kobav et al.

## plotskydirecto

Creates a directogram plot of a Tregenza sky hemisphere