2009

Weather Data File When chosen, daylight derives the angle and
intensity of the sun from a weather data (EPW) file.
Click the button to open a Configure Weather Data dialog on page 5148,
where you can specify the EPW file and choose which weather data you want
the daylight system to use.
Azimuth and Altitude
Azimuth/Altitude Displays the azimuth and altitude of the sun. Azimuth is
the compass direction of the sun in degrees (North=0, East=90). Altitude is
the height of the sun above the horizon in degrees (Sunrise or Sunset=0).
Time group
Provides settings for the time, date, and time zone.
If the location you choose uses Daylight Savings Time, turn on the Daylight
Saving Time checkbox. The Sunlight system adjusts the sun's azimuth and
altitude accordingly during the summer months.
Hours/Mins/Secs Specify the time of day.
Month/Day/Year Specify the date.
Time Zone Time zones range from –12 to 12. If you're uncertain about a time
zone, you can look them up in Window's Date > Time Properties dialog
(available through My Computer > Control Panel > Date > Time). Click the
Time Zone tab, and then display the list of world locations and their time
zones.
Daylight Savings Time When on, calculates daylight savings by adjusting
azimuth and altitude during the summer months.
Location group
Provides controls for setting the location of your scene in the world.
Get Location Displays the
Geographic Location dialog on page 5151, which lets
you set the latitude and longitude values by selecting a location from a map
or a list of cities.
NOTE For precise locations, enter exact coordinates using Latitude/Longitude.
Sunlight and Daylight Systems | 5147