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- Regular or Lite?
-
- Many individuals will find WorldClock Lite suits their needs fine, just as it is. Others
- will want to upgrade to the full WorldClock program.
-
- WorldClock Lite is intended to provide most of the features desired by the casual
- user, with sufficient documentation needed to install and run it, in a package small enough
- to be downloaded by modem fairly inexpensively. To reduce size and downloading time,
- WorldClock Lite comes with a much smaller, non-illustrated documentation file, and a
- smaller database of stored worldwide locations.
-
- First of all, WorldClock Lite gives accurate times for sunrise, sunset, moonrise and
- moonset at each of the 190 locations in its database. (Accuracy is ┬▒ 1 minute for sunrise
- and sunset and ┬▒ 2 minutes for moonrise and set.) Since WorldClock Lite does
- not have the option to add your own specific location to the database, the accuracy of the
- forecast sunrise/sunset and moonrise/moonset times for your specific location, will
- depend upon how near you are to the closest location stored in the program's database.
- Chances are pretty good that there is a database location within 100 miles of you, if you
- live in the United States.
-
- The Earth turns one degree toward the east every four minutes. At 38┬░ north latitude (the
- latitude of San Francisco) one degree to the east is approximately 56 statute miles. Thus,
- if your actual location were to be 56 miles east of San Francisco, and WorldClock Lite
- were set to San Francisco, the times reported by WorldClock Lite would be correct for
- San Francisco, but approximately four minutes later than the actual times at your location.
-
- To oversimplify a bit, if your location is anywhere within 100 miles
- of the database location you have selected, the difference between the
- actual times, and the rising and setting times forecast by WorldClock
- Lite, will generally be eight minutes or less.
-
- With WorldClock Lite, you can...
-
- ΓÇó See the present pattern of daylight and nighttime over the globe.
- ΓÇó See the current time at any five of the 190 WorldClock database locations.
- ΓÇó Set the "location" of any of the five clocks by clicking on the clock, and then selecting
- the new location from a scrolling list.
- ΓÇó See the current time in AM/PM, 24-hour, or Universal Time format.
- ΓÇó See the present position of the sun over the earth.
- ΓÇó See the present position of the moon over the earth, and the phase of the moon.
- ΓÇó Determine sunrise/set, moonrise/set, twilight times, and hours of daylight for any of the
- 190 locations in the database.
- ΓÇó Experiment by clicking on the map to see the above information for the location clicked.
- ΓÇó Set the date with a clickable calendar.
- ΓÇó See the dates for the key moon phases - new moon, 1st quarter, full moon, and 3rd
- quarter - for the current month or any month of interest.
- ΓÇó See a "sundial" display for the database location currently selected. The sundial display
- can be animated and/or frozen to display shadow conditions at any particular time for
- the database location selected.
- ΓÇó Select from among 190 worldwide locations, and set your system clock.
-
- With WorldClock, in addition, you can...
-
- ΓÇó Choose from over 340 worldwide database locations.
- ΓÇó Add additional database locations of your own, up to a maximum of 400 locations.
- ΓÇó Select the daylight savings time start/stop rule to be used by each location you add.
- ΓÇó Get the maximum possible accuracy for your particular location.
-
- Profile of the WorldClock Lite user...
-
- Works at a desktop Macintosh, located within 100 miles of one of the WorldClock Lite
- database locations.
-
- Uses WorldClock Lite primarily to see the current day/night pattern over the world, and
- to see the current time at key world locations.
-
- Occasionally needs to see the dates of key moon phases during a month, and/or to see
- the approximate times of sunrise and sunset, moonrise or moonset.
-
- Educational user demonstrating earth-sun-moon relationships to a class.
-
- Profile of the full WorldClock program user...
-
- Works at a desktop Macintosh, located more than 100 miles from the nearest WorldClock
- Lite database location, or uses a PowerBook from a variety of locations.
-
- Someone who travels frequently, taking a PowerBook along.
-
- Uses WorldClock to forecast specific solar or lunar conditions, including sun/moon
- positions and shadows, at a given time. Such a person might be a photographer,
- cinematographer, pilot, ham radio operator, boat/ship operator, or astronomer.
-
- Someone who simply prefers to have the most accurate information available for his or her
- location.