To use this version of Earth&Sun you must install a Ewe¹ VM (Virtual Machine) on
your computer. Ewe is a version of Java which runs on a variety of desktop and handheld
computers. It is very compact and efficient. It uses only about 2 Mbytes of memory.
To learn more about Ewe please read the introduction on the Bray Mobile Applications page.
Earth&Sun is an application that shows a map of the Earth with Sun illumination and it will also display:
We hope you find Earth&Sun useful and enjoy it.
The first thing to do is to install the Ewe VM on your computer(s), if not already installed. Follow the instruction found on the Ewe Download and Installation Page for your computer. The Ewe installer will create directories on your computer and put the Ewe VM files in them. After Ewe is installed find the Ewe directory. For example, in a Windows Desktop it will be where you told the installer to install it, and in the Pocket PC it will (probably) be in /Windows/StartMenu/Programs/Ewe.
There is no installer for Earth&Sun.ewe. The files in the earthsun10Install.zip archive can be put in any directory of your choice. However it is recommended that you put them in the directory with the Ewe VM. Specifically the directory in which you find 'ewe.ewe'. This will make it easier to find them if you want to change them, and when you add additional applications from Bray Mobile Applications common files can be shared.
Once you find the proper directory copy all of the files in earthsun10Install.zip into that directory, in what ever manner you do that on your computer.
Note: No matter what Regional settings are used on your computer(s), Earth&Sun always uses the '.' (period) as the decimal point, the ':' (colon) as the hour/minute/second separator, and the ',' (comma) as the data separator.
Earth&Sun should be ready to run now. Find Earth&Sun.ewe with your File Explorer, click on it
to try it out!
Using the Program
The shaded area is that part of the world that is dark at the current time. The location where the Sun is directly overhead is shown by a little yellow Sun icon. It is located near the equator in Africa in the image at the top right.
Upon your first view of the Earth&Sun map you will note that the Sun's location and Night Shading is not correct. This is because Earth&Sun does not know the time zone to which your computer's clock is set. It thinks it is set to Greenwich Mean time. After learning about the display and its controls, instructions on setting the time zone correctly are given.
Hopefully program usage is pretty much self evident once you understand the instructions documented next.
Refer to the first and second rows of the text display area from left to right.
For a tapped location:
In the Distance mode the text display area changes as shown on the right.
Tap a location on the map. For the tapped location:
Each time the map is tapped, data is put into the active row and change the distance and bearing to reflect the new location. When you tap Menus in the upper left of the display, the menu shown ton the right will pop-up.
There is additional ways to display the reference data.
--- Tap above or below the data line displaying: time/zone/lat...
This works in either the Time or Distance modes.
When traveling with your handheld computer be sure to set both of these menu items when you change time zones.
Back to the Top Button discussion.
To do this:
Back to the Time Mode discussion.
The sunrise/subset times are accurate for the displayed latitude/longitude. See for discussion on the NTZ/FTZ Button which follows. This gives an example of different times at different longitudes.
Back to the Time Mode discussion.
NTZ/FTZ -- Normal/Freeze Time Zone Button
Since the time zone is based solely on longitude the NTZ/FTZ (Normal/Freeze Time Zone) button
allows you to freeze a time zone so that in the you can find sunrise/sunset times for locations
which do not follow normal time zone rules. For example: Alaska extends over 4 time zones,
Russia and China extend over 3 times zones. Also there are locations like western Texas where
the time zone boundary is very much west of where it should be.
To use this feature put the pen down on a location which is in the desired time zone. For example: Alaska time is 9w, so tap the map on eastern Alaska and verify that the time zone is 9w. Then observe the sunrise/sunset times. Next tap the NTZ button. It will change to FTZ (Freeze Time Zone)*. Then tap the western part of Alaska and the sunrise/sunset time should be about 2 hours later. Now tap the far western Aleutians Islands and see the sunrise/sunset advance another hour. Note that the time zone still reads 9w.
With a frozen time zone it is possible that the sunset could occur in the next morning. In this case the time might be, e.g. 24:10. The same is true for sunrise except it might occur the previous night, with a sunrise e.g. of 23:45. Note: In these cases the date does not change.
*Because this button can cause large inaccuracies, a warning is popped up to be sure you really want to change to the Freeze Time Zone mode.
Back to the Bottom Button discussion.
|United States||Around the World|
|Time Zones||Offset||Time Zones||Offset|
|Eastern||5 West||British Isles||0 East|
|Central||6 West||Western Europe||1 East|
|Mountain||7 West||Eastern Europe||2 East|
|Pacific||8 West||MidEast||2 East|
|Alaska||9 West||So. Africa||2 East|
|Hawaii||10 West||Russia||3 East|
|South Australia||9.5 East|
|Eastern Australia||10 East|
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Install the alternate maps by simply replacing the current ones in the directory containing
Earth&Sun was created by David W. Bray, Potsdam, NY;
Copyright © David W. Bray 2004, All Rights Reserved.
The Bray Palm OS Page can be found at: http://davidbray.org/palm
This archive may be freely redistributed, provided it is made available only in its complete, unmodified form with no additional files and for noncommercial purposes only. Any other use must have prior written authorization from David W. Bray -- Email address here..
Unauthorized commercial use includes, but is not limited to:
¹ Ewe is developed by Michael L Brereton. We are indebted to him for his outstanding software product and making it freely available. Thank you Michael!
*Changes in Version 1.0
Earth&Sun Version 1.0 Bld: 439 differs from Version 1.0 Bld:418 in:
To be sure that your version is up-to-date check the Bld: number in the current description of Earth&Sun at: http://davidbray.org/mobile/
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