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- Sunrise Today/Sunrise Tomorrow
-
- (Hint: Run WorldClock Lite and refer to the screen while reading this documentation page
- from a printout.)
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-
- The Sunrise Today or Sunrise Tomorrow display is selected from the
- WorldClock Lite menu in the bar at the top of the screen.
-
- The text beneath the map indicates the times for sunrise and sunset at the computer's
- location. In addition, times are given for civil, nautical, and astronomical twilight.
- Civil twilight is bright twilight, where the sun is within 6┬░ of the horizon. Nautical
- twilight is deep twilight where the sun is between 6┬░ and 12┬░ below the horizon.
- During Astronomical twilight (sun between 12┬░ and 18┬░ below the horizon) there is
- still enough light in the upper atmosphere to interfere with astronomical observations.
-
- A "Sun-Bar" near the bottom of the screen graphs the hours of day, twilight, and dark.
-
- For a quick check of sunrise, sunset, and twilight times tomorrow, choose the
- Sunrise Tomorrow option in the WorldClock menu. The display is the same as
- for Sunrise Today, except it is adjusted one day ahead.
-
- The map is an active input area on the Sunrise screens. Click on the map to see sunrise,
- sunset, and twilight times at any worldwide location, including near the poles. When
- you are done experimenting, to reset to the original setting, click the Revert button.
- The "Sun-Bar" is useful in this mode, giving graphical information about the length of
- sunrise, twilight, and nighttime around the earth.
-
- Note: When using the map for input, idealized time zones are assumed. The actual, statutory time
- zones are not considered in the sunrise/sunset calculations when clicking on the map as an input device.
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