Sol! II Documentation

Sol! Icon

Sol! II Version 5.5.0 - 2004 October 11

Sol! II is a Sun, Moon, Day, Night and Twilights Calculator.

Sol! II computes Sun & Moon Rise, Sun & Moon Set, length of day, length of night, length of moon time moon is up, start and end of Civil, Nautical and Astronomical twilight, and the length of day and night with twilights added.

Sol! II computes the position of the Sun & Moon and also has a Compass feature.

Sol! II now includes local circumstances of Transit calculations. Two (2) transits for Mercury are currently included. The first occuring on November 15, 1999 and the next occuring on May 7, 2003.

Sol! II Animation

Features and Benefits

[ Go to Index ]
  • Sol! II can run on all versions of Palm OS later than version 2.0. Sol! II is the second comprehensive Sun Rise and Sun Set program available on the PalmOS platform. The first was Sol! which is no longer available.
  • Star Pilot Technology's Location Manager compatible
  • Simple to install and use
  • Tabular output of times and day lengths
  • Menu option and quick display button M for displaying Moon Rise and Moon Set information for the selected date.
  • A "diamond" button to Launch Star Pilot if it's installed. "Quick Launch" buttons and Menu options to launch J-Moons!, Moon Phase and Sidereal Time are also displayed if those applications are installed. Note: Quick Launch buttons are only available in the registered version of Sol! II
  • Sun Position information, including distance in kilometers, angular diameter and ecliptic longitude for Rise, Set and Transit. The registered version can also show you position information for all twilight times.
  • You can use the program to find the times and azimuth of the Sun at a user specified elevation.
  • Sol! II can display times and lengths in non-rounded fractional minute mode. Due to limited display space, times can only be displayed in 24 hour format when not rounded.
  • Sol! II, like it's predecessor Sun!, has the exclusive Shadow Compass™ feature found in our PalmOS Software products.
  • The selected date's Moon Rise and Set times, if applicable, and the amount of time the moon is up are displayed on the main screen.
Sol! II Display


  • The moon display shows the rise and set times of the Moon on the selected date, and on the date prior and after the selected date.
  • The rise and set position of the moon, on the horizon, are shown with each event.
  • The moon events are displayed in chronological order as they would occur.
Moon! Display


The Night! display shows Sun Set and end of twilights for the selected date, and Sun Rise and start of twilights for the date following the selected date, and the length, or difference in time between the times and dates.

The length of the night, from Sun Set on the selected date until Sun Rise on the following date, in this example, is 11 hours 25 minutes.

However, since it's still "light out" just after Sun Set because of atmospheric refraction, during the twilight times, the length of night with no more brightness than Civil, Nautical and Astronomical Twilight is included.

The time between the end of Astronomical Twilight on the selected date and the start of Astronomical Twilight on the following date is the darkest period of the night, assuming a moonless sky.

If you're an astronomer, this means that starting at 9:01pm on September 10, 2000 in Danville, VA, you have approximately 8 hours and 29 minutes of the darkest observing time, assuming a moonless sky.

However, the moon is up on this date for most of the night, making the darkest part of the night begin at 4:40am and only lasting 50 minutes (because Astronomical Twilight starts at 5:30am).

There is no "weather" interface, so even if the moon isn't there, you still have to look out and see if it's cloudy or clear!

The night display now calculates the maximum darkness period and when it starts automatically. This feature was added for The ASPIRE Project at the The University of Utah.

It's a useful feature for Amateur and Professional Astronomers too since it allows you to plan your observing session at the darkest times of the night.
Night! Display

Benefits of Registration

[ Go to Index ]

Several "speed and quick access enhancements" are not available in the trial version. Registration adds these features:

  • Quick Launch Button Bar on the main screen for launching Star Pilot, J-Moons!, Messier! by Star Pilot Technologies, the freeware Moon Phase and Moon Info! and Sidereal Time.
  • A small round button in the lower right hand corner for quick access to the compass.
  • On the compass, 8 additional buttons for quickly finding the Sun's position at Rise or Set, or at the beginning or end of Civil, Nautical and Astronomical Twilight.
  • The Night button on the main screen is made available for quick access to the View Night menu option.
  • The Sun button on the main screen activates the Find Times at Altitude calculator for quickly finding the times when the sun will be at a user selected altitude.
  • The Moon button on the main screen activates Moon Info!.
  • Each displayed time on the main screen becomes "active" so that if you tap it, you're placed on the Sun Information screen with the calculations done for that time.

Development of Sol! II, was made possible with user feedback and support. However, continued enhancement of Sol! II is no longer provided for the PalmOS platform.


[ Go to Index ]

Download the PRC files then use the PalmPilot install tool to install astrolib.prc and sol2_sw.prc; then HotSync. (The registered PRC file is sol2.prc)

Download and install Location Manager from Star Pilot Technology's web site.


[ Startup ] [ Selecting Dates ] [ Location ] [ Position Information ] [ Moon Rise & Moon Set ] [ Compass ] [ Sun Track ] [ Transits ] [ Launch Programs ] [ Go to Index ] [ Go to Top ]


When you first run Sol! II the program will compute the rise, set and twilight times for the default location of Location Manager for the current date.

Selecting a Date

Changing the date is easy: Use the left or right arrow on either side of the displayed date to go back or forward one day. Or, press the displayed date to use the Date Selector to pick a date.

Selecting Location

[ Go to Index ]

To program in your own location, press the displayed location name.

This will start the Location Manager program for location entry.

Tap Add or Edit to add a new location or edit and existing location in the Location Manager database.

You have 25 characters for your Location Name.

Enter your Latitude and Longitude in degrees and minutes in the appropriate fields. If you're entering a Southern Latitude, press the South push button. If you're entering an Eastern Longitude, press the West push button.

Select your Time Zone or UTC value using the drop down time zone selector.

Click on Ok to save and exit back to the primary Location Manager screen.

For automatic application of DST rules, check the Observe DST check box.

Press Ok to save and exit, or Cancel to cancel coordinate entry. When you return to the main screen of Sol! II the appropriate times for the location entered will be calculated.

Sol! II Location Entry

Using the Global Position System (GPS) Web Tools web page ( you can find Latitude and Longitude information for United States Cities, Airports, and World Cities. This information was provided courtesy of David Fischer, author of Sun-Pal for the PalmPilot (see references).

Another great site, Internet Atlas and Timezone Server has Latitude, Longitude and Timezone (UTC) information for over 256,000 locations worldwide.

Using these methods, you should be able to get the coordinates of most locations.

Sol! II Location Entry

Position Information

[ Go to Index ]

Using the View menu option, position information for Rise, Set, Transit and Now can be displayed.

The available information includes:

  • Distance to Sun in kilometers
  • Angular Diameter of Sun in decimal degrees
  • Ecliptic Longitude of Sun in decimal degrees. Ecliptic Latitude is assumed to be zero (0).
  • Right Ascension in hours and minutes.
  • Declination in decimal degrees.
  • Hour Angle in decimal hours.
    Tap h(alt) to calculate the times of the day, and azimuth for when the sun will be at a user specified elevation.
  • Azimuth in decimal degrees. 180 = South.
    Tap Az(0=N) trigger to pull up the time calculation screen for when the sun is at a user specified azimuth.

If no rise or set event takes place on a given day or location, the View menu options for Rise and Set will generate an informational error message.

The Transit Position view always works.

Use the i button for field help information.

Use the Now button to display the Sun's position for the current date and time.

If your PalmOS device has OS 3.1 or later installed, you can tap Time to select a new time to calculate sun position information for. Otherwise you can use the time selector arrows below the hours and minutes to adjust the time 1 unit at a time.

ETA from current time is calculated for the selected time. If the ETA is negative, then the selected time is in the past and the calculated value is the hours and minutes since that time.

Use the T button to display the Sun's track for the day, and to show where the Sun will be or was at the time selected on the Information screen. An example of the Sun Tracking screen is below.

Use the Ok button to return to the primary screen of Sol! II

Sol! View Menu
Sol! II Position Information

Moon Rise & Moon Set

[ Go to Index ]

To display the Moon! information screen, press the M button to the right of the date that is displayed on the main screen of Sol! II, use the /M Graffiti shortcut, or use the View menu option Moon Information.

The Moon! display will show the rise and set times of the Moon for three dates centered around the selected date. If the Moon doesn't rise or set for a particular day, or if the Moon never sets or rises on the selected date, an informational message will appear on the screen.



[ Go to Index ]

To display the Night! screen, use the View menu option and select Night. Registered users can simply press the Night label on the main Sol! II screen.


Find Times at Altitude

[ Go to Index ]

This screen allows you to calculate when the sun is going to be at a specific altitude on the currently selected date.

Access to the screen begins by pressing the Sun button on the main screen, or by pressing the h(Alt) trigger on the Sun Information screen.

To use this feature, enter an altitude in degrees into the Altitude field and press Calc. If you want to compute the time when the upper limb of the sun will be at the entered altitude, make sure the Upper Limb checkbox is checked. If you want to compute the time for when the center of the sun will be at the entered altitude, uncheck the Uppler Limb checkbox.

To return to the previous screen, press the Ok button.

Find Times at Altitude

Find Times at Azimuth

[ Go to Index ]

This screen allows you to calculate when the sun is going to be at a specific azimuth on the currently selected date.

Access to the screen begins by pressing the the Az(0=N) trigger on the Sun Information screen.

To use this feature, enter an azimuth in degrees into the Azimuth field and press Calc. If the sun never reaches the entered azimuth, an error display will be shown indicating the value entered is invalid.

To return to the previous screen, press the Ok button.

Find Times at Azimuth

Sun & Shadow Compass

[ Go to Index ]

Use the View Menu option Sun Compass to display the Sun Compass for the current time. Optionally, you can use the Grafitti shortcut /C to display the compass.

Operation of the compass is simple. Point the front of your Palm device at the Sun. The large triangular compass "vane" points to North. Arranged clockwise from the North vane, the small straight vanes represent East, South and West respectively.

When you're finished viewing the compass, you can press Ok to return to the main screen of Sol! II Or, you can press Now to update compass with the current calculated position.

The Sun Compass can be switched to Shadow Compass™ mode by pressing the I push button in the upper right hand corner of the display just below the i information button.

There are four buttons on the left of the compass, labeled R, C, N, and A. These buttons are used to show the Sun's direction relative to North for Rise time, Start of Civil, Nautical or Astronomical Twilight.

There are four buttons on the right of the compass, labeled S, C, N, and A. These buttons are used to show the Sun's direction relative to North for Set time, End of Civil, Nautical or Astronomical Twilight.

These 8 buttons only appear as long as the date selected on the compass is the same as when the compass was originally displayed. If you change the date, the buttons disappear because those 8 values are not recomputed when you simply change the date or time on the compass.

You can also change the date and time the compass is displayed for by tapping the date selector or time selector (time can only be changed if your Palm device is running Palm OS 3.1 or later).

Additional peration of the compass is summarized on the i button.

Sun Compass

The photograph at the right shows an example of how to use your stylus and the Shadow Compass™ to determine the direction of North.

Shadow Compass

Sun Track

The Sun Track screen shows the path the Sun will take for the selected date. If you use the Sun Track menu option to display the Sun Track, then the Sun's current position will be shown if it is current above the horizon.

You can also get to the Sun Track screen by tapping any of the displayed times on the screen. This will bring up the Sun Information screen. Then press the T button to show the Sun Track and the position of the Sun at the selected time.

The South or North pole is indicated by a vertical hash mark centered on the display. Additional information displayed is the Sun's azimuth. Both Azimuth and Elevation are displayed on the Sun Information screen.

A fluffy white cloud floats across the top of the screen while you're looking at the Sun Track.

Sun Track Screen


Use the Transits menu option to compute the local circumstances for past and future Transits. Currently the previous and next Mercury transit are available. The 2004 Transit of Venus will be added to an upcoming version.

The local circumstances are: local time of 1st, 2nd, 3rd and 4th ingress or egress (tap the 1, 2, 3, or 4 button). Tap M for the local time of the midpoint of the transit. Additionaly, the altitude (Alt.) of the Sun at the time of that circumstance, as well as the position angle (P.A.) of the planet relative to Solar North measured towards the east will be displayed.

For example, the position angle of Mercury on 2003 May 7 for the midpoint of the transit is -27.01 degrees. This indicates the angle from Solar North (0 degrees) is 27.01 degrees West of North, or towards the right hand side of the display. Positive angles are towards East or the left side of the display.

Solar North is up and Solar East is to the left of the display.

The line across the solar limb is the path of the planet.

Transits Menu Choices
Mercury Transit 2003 May 7

Launching Other Programs

[ Go to Index ]

Sol! II can quickly and easily launch other astronomy related programs that are installed on your Palm device. If you're using the registered version of Sol! II then you can launch Star Pilot if it's installed using the the diamond launch button in the lower left hand corner of the display.

Launch Buttons

Buttons to launch other programs such as J for J-Moons!, P for Moon Info! or Moon Phase, or T for Sidereal Time will be displayed to the right of the date if they are installed.

The P button is a multipurpose button. If you have Moon Info! installed the P button will launch it. If you don't have Moon Info! installed, it will launch Moon Phase if it is installed. If you have both installed, Moon Info! is the one that gets executed.

Optionally, you can use the Options Menu or Grafitti shortcuts listed to invoke the other programs. If the program selected using the shortcut or menu option isn't installed, an error message will be displayed.

Options Menu

Removing Sol! II

[ Go to Index ]

To remove Sol! II use the Memory program or on Palm III's use the Delete Application menu option in the Launcher. Removing Sol! II automatically removes it's preferences database.

If you have no other applications using Location Manager, you can remove all the associated files. For a list of all the appropriate files, please consult the Location Manager web site.

Possible Future Enhancements

[ Go to Index ]
  • Moon Transit time.
  • Automatic time update on main screen, and other screens that display the time.


[ Go to Index ]
  • Astronomical Twilight - time when the Sun is from 18 degrees to 12 degrees below the horizon.
  • Civil Twilight - time when the Sun is 6 degrees below the horizon or higher, but not visible. When viewed in the sky, the Sun and Moon both are about 0.5 degrees wide.
  • DST - Daylight Savings Time. If your area changes the time during the daylight savings time period from the first Sunday in April until the last Sunday in October, then Sun! will automatically adjust it's calculations if DST is enabled for a location.
  • Nautical Twilight - time when the Sun is from 12 degrees to 6 degrees below the horizon.
  • Sun Rise - time when the upper limb of the Sun is becoming visible above the horizon. Sol! II factors in atmospheric refraction in it's Sun Rise and Sun Set calculations.
  • Sun Set - time when the upper limb of the Sun is going below the horizon and the Sun is no longer directly visible.
  • Transit - transit time of a celestial body refers to the instant that its center crosses an imaginary line in the sky - the observer's meridian - running from north to south.
  • UTC - Correction (in hours) to Universal Time. In Sol! II this is equivalent to your Time Zone. For example, Eastern Time has a value of -5.0 for UTC.


[ Go to Index ]

There are many references on the Internet. This is only a partial list, most of which were used for development and testing of Sol! II

  • United States Naval Observatory
    • USNO Sun and Moon Data for One Day
    • USNO Sun or Moon Rise/Set Table for One Year
    • USNO Definitions of Rise, Set & Twilight
  • Literary References
    • Introduction to BASIC Astronomy with a PC by J. L. Lawrence, published by Willmann-Bell, Inc. (
    • Astronomical Formulae for Calculators, Fourth Edition, by Jean Meeus, published by Willmann-Bell, Inc. (
    • Astronomical Algorithms, First Edition, by Jean Meeus, published by Willmann-Bell, Inc. (
    • Astronomy Software for Microcomputers, published by Sky & Telescope

Known Issues

[ Go to Index ]
  • The times of local circumstances for the 1999 Mercury Transit are computed as if there is no DST offset in affect. For some locations (outside of the United States in the Southern Hemisphere) computed times may be off by 1 hour.
  • The times of local circumstances for the 2003 Mercury Transit are computed using DST rules for the United States. For some locations the times may be off by 1 hour.
  • The flashing cursor used to highlight the ingress and egress points of the transits do not line up exactly on the Solar limb drawn on the display.
  • Times computed by Sol! II during the period between midnight and the time of DST on the date of DST change can be off by an hour. For example, in the United States, from midnight until 2am on the first Sunday of April, and between midnight and 2am on the last Sunday of October, the computed times for a day can be off by one hour depending on your settings for DST.

Release History

[ Go to Index ]
  • 2013 June 25
    • Documentation extensively updated.
    • Deprecated links have been removed (there are many sites that have been moved or no longer exist).
  • 2013 June 24
    • Sol! II application tested using StyleTap running under Android OS 3.2.1.
  • 2004 March 11 - Sol! II v5.5.0
    • Added Venus Transit 2004 Circumstances
    • Fixed bug with 2004 September Equinox calculation.
  • 2004 March 6 - Sol! II v5.4.0
    • Added Ephemeris screen which includes the Equation of Time calculation.
    • Added Quick Launch buttons for Saturn!
  • 2003 June 9 - Sol! II v5.3.2
  • 2003 May 2 - Sol! II v5.3.1
    • Updated the Help Menu to include registration and support options.
  • NOT RELEASED - Sol! II v5.3.0
    • Began development on a preferences screen and ephemeris screen.
  • 2003 April 28 - Sol! II v5.2.0
    • Local Circumstances for the 1999 and 2003 transits of Mercury have been added.
    • The shareware (or unregistered) version of Sol! II expires and will not operate after the 31 day demonstration period.
  • 2003 April 18 - Sol! II v5.1.0
    • When selecting the Find Times at Altitude page, the cursor is automatically placed in the Altitude field.
    • When selecting the Find Times at Azimuth page, the cursor is automatically placed in the Azimuth field.
    • Fixed text on Find Time at Azimuth page replacing Az. with Alt. for the Sun's altitude.
  • 2003 April 10 - Sol! II v5.0.0
    • New Sun Track screen shows the path the sun will travel during the day, and it will show the position of the Sun if it is above the horizon.
    • Times have to be displayed in 24 hour format when the rounding check box is unchecked. Now the check boxes accurately reflect the status of the times displayed.
    • The Sun Information screen allows you to display the Sun Track screen and the Sun at a specified time.
    • Fixed several long informational messages so that they don't overwrite other displayed data
    • Altitude value is now displayed on the "Find Times At Azimuth" page.
    • Fixed a display issue with high North and South Latitudes that caused a zero value for length of time Moon was up being displayed when it should not.
    • Fixed a memory leak on the multiple Moon Rise and Sets page.
  • 2003 March 29 - Sol! II v4.2.0
    • Now full Palm OS 5 compliant
    • Added a Solstice's screen to the program.
  • 2000 October 22 - Sol! II v4.1.0
    • Time rounding bug on compass display fixed.
  • 2000 October 2 - Documentation updated.
  • 2000 September 10 - Sol! II v4.0.0
    • Online documentation updated.
    • 8 quick view buttons were added to the Compass.
    • New icon for non color Palm devices.
    • Program was converted from PRC Tools v2.0 to CodeWarrior R6.
  • 2000 August 21 - Sol! II 3.4.0, registered version only update.
    • You can now tap the moon rise and set times when applicable to compute the sun's position and find the ETA to the event.
    • Dates displayed by Sol! II now follow the user defined preferences in the Palm OS Preferences application.
    • Some times displayed by Sol! II follow the user defined preferences.
    • Times on the main screen still use special formatting to get them to fit on the display. This may be readdressed later.
    • Date & Time are now displayed on the Compass Screen.
    • You can change the date on the compass screen.
    • If you're using PalmOS 3.1 or later, you can also change the time on the Compass screen.
    • The Sun Information screen now has a "compass button" to the left of the "Ok" button which can be pressed to show the compass settings for the selected time. So, if you want to see the sunset compass position, tap the sunset time, then tap the compass button.
    • Changing the date/time on the compass screen or Sun Information screen no longer affects the calculations on the Main screen, so if you choose a date in the future, then go to the compass screen and press now, then return to the main screen and hit next or prev day buttons, you get the day before/after the displayed date. This still needs to be fixed for the Sun Position/Information screen.
    • Moon on the main display will now launch Moon Info! (if installed) or Moon Phase (if installed and Moon Info! isn't installed).
    • A "moon length" value has been added to the right of Moon Rise and Set times. This value is the length of time that the moon is UP during the selected date.
    • For Palm IIIc users, the compass is now in color!
    • Added a menu option under View for the displaying the position of the sun for now.
    • Updated the compass so that a small diamond is displayed for the Sun pointer.
    • Star Pilot's Location Manager is now optional for Sol! II. If you only need 1 location, and are only going to apply US Daylight Savings Time rules, then you no longer need to have Star Pilot's Location Manager installed. You can remove these files: llmgr.prc, locmgr.prc and loc*.pdb files installed on your Palm. Caution: Do not remove Location Manager if you're using Star Pilot or other programs by Star Pilot, J-Moons!, Moon Info!, or other applications that require Location Manager.
    • AstroLib 1 and MEW3 Lib, the shared libraries distributed with Sol! II are no longer necessary and can be removed from your Palm, unless: You're using Moon Info! or J-Moons! This is the biggest change requiring several internal changes to the application.
    • The program now as an ETA (Estimated Time of Arrival) feature on the Sun Position Information screens. Tap any time on the Sol! II main display and a sun position information screen will pop up. If you press the Sun Set time, and it's before sun set, you'll see a positive hour and minute value by ETA, which is how long it is until sun set. If you press a time that has already passed, then the ETA will show a negative value indicating the even happend so many hours and minutes in the past.
    • Program was converted from PRC Tools v0.5 to v2.0 and now uses multiple code segments.
    • A shareware version of this release was not made available.
  • 2000 May 29 - v3.3.2
    • Contact information updated. No other features added or bug fixes made.
  • 2000 April 18 - v3.3.1
    • Corrected a problem with the small icon and grey icon resources used by Palm OS 3.x.
  • 2000 April 13 - v3.3.0
    • Color icons and small icons added for OS 3.x support
    • Time label on Information Screen now lets you select times using the OS 3.1 and higher time picker. For OS 3.0 or earlier devices this feature isn't enabled.
  • 2000 February 13 - v3.2
    • A bug with the new rounding feature was updated in MEW3_lib.prc that caused the program to incorrectly round when rounding up to the next hour. A related issue to this bug was also updated in Sol! II
    • When calculating the time for an azimuth, the program will now correctly display that it can't find a time on the current day instead of sometimes printing 12:00am (or 00:00).
  • 30 January 2000 - v3.1
    • Sol! II can now calculate the time that the sun is at a specified azimuth on the day.
    • The support library MEW3_lib.prc had a rounding bug that was corrected.
  • 29 November 1999 - v3.0
    • Maximum darkness calculation is now supported on the Night Screen.
    • Sol! II no longer supports Palm OS prior to version 2.0, and requires MathLib.prc
  • 27 October 1999 - v2.7
    • Corrected a bug that caused the Palm OS device to fatal crash when starting Sol! II, without the loss of data, when the required library MEW3_Lib.prc isn't installed. Now the appropriate dialog asks you to install MEW3_Lib.prc to use Sol! II
  • 24 October 1999 - v2.6
    • Corrected a bug that caused the Palm OS device to fatal crash when starting Sol! II, without the loss of data, when Star Pilot's Location Manager program wasn't installed. Now the appropriate dialog asks you to install Location Manager.
  • 1 October 1999 - v2.5
    • A new menu option has been added to allow users to calculate the time and azimuth that the sun will be at a requested elevation.
    • Several speed ups to the shareware version have been made.
    • A font problem with the Palm Vx was corrected.
  • 14 September 1999 - Sol! II v2.4 (registered and shareware updated)
    • Sol! II has now been updated to use the latest version of Location Manager, v1.5
    • MEW3_lib.prc, a support library previously used by Moon Info! is now required by Sol! II
    • On the sun information screens you can now change the time of the calculations by tapping the word Time displayed on the screen.
  • 24 August 1999 - Sol! II v2.31 (registered version update only)
    • A bug in the registered only version of Sol! II prevented the P button from showing up on the main display unless Moon Phase was installed. This button will be displayed when either Moon Info! or Moon Phase (or both) are installed.
  • 23 August 1999 - Sol! II v2.3
    • The registered version of Sol! II can now launch the Moon Info! program if it's installed by pressing the P "active label" on the main Sol! II display.
    • A bug in the Rise, Set, and Transit information screens, and the Night/Moon information screens caused a fatal reset in the SHAREWARE version of 2.2 only. This problem didn't affect the registered version of 2.2, and has been corrected in this release.
  • 25 July 1999 - Sol! II v2.2.0
    • Night mode added.
    • Registered version can display sun position information for the twilight times
    • Registered version has a quick compass access button, and quick night mode access button.
    • Additional speed ups were incorporated in the registered version.
    • A bug was fixed in the answer "caching" logic that affected sun position information for Sun Set and twilight times after sun transit time for locations east of Greenwich.
    • Single Location mode was removed, to make room for Night! display.
  • 18 July 1999 - Sol! II v2.1.3 registered version release only
    • Fixed a bug introduced by the answer caching feature that caused the Rise, Transit and Set position menu options to display the wrong time/information.
  • 13 July 1999 - Sol! II v2.1.2 registered version release only
    • Answer "caching" was implemented to speed up display of screens in Sol! II. Prior to this release leaving the main form to any other form in the application caused Sun Rise/Set and Moon Rise/Set to be recalculated slowing the application down. Caching of answers between invocations of the program is a feature that is planned in a later release.
    • A menu option to launch Sidereal Time was added.
  • 28 June 1999 - Sol! II v2.1.1 release
    • Another "24 hour" bug was corrected for times that were smaller than 0, which means they were on the prior day. This can easily happen when you're displaying times in UT from a location East of Greenwich.
  • 26 June 1999 - Sol! II v2.1.0 release
    • Moon Rise and Set times added to the main display
    • The Moon display is now a table showing the prior date, selected date and next date's moon rise and set information. The events are shown in chronological order.
    • The UT check box was added to quickly recompute the times in UT.
    • A "24 hour" bug was corrected in which times that were larger than 24 hours, i.e. they should occur on the next day, were being converted to a "PM" time and not remaining an "AM" time.
  • 20 June 1999 - Sol! II v2.0.0 release
    • Moon Rise and Moon Set times added
    • Rise and Set position of the Moon added
  • 16 May 1999 - Sol! II v1.2.0 release
    • Shadow Compass™ added.
    • The compass vanes now have legends for East, South and West.
    • Sol! II now has it's own documentation!
  • Unreleased - Sol! II v1.1.1
    • Sol! II requires at a minimum that the llmgr.prc file included with Location Manager be installed. If no other Location Manager PRC files are installed, Sol! II will operate in "single location" mode like its predecessor Sol!.
  • 16 January 1999 - Sol! II v1.1.0 released
    • If you're using Glen Aspeslagh'sSidereal Time application, a quick launch button, T, will be displayed at the bottom of the Sol! II screen.
    • The "unrounded" option was added to Sol! II so that you can display times with fractional minutes.
    • Corrected two DST related bugs that caused the compass and the sun information screen to display it's settings with US only DST rules.
  • 5 January 1999 - Sol! II v1.0.0 released
    • Sol! II integrates with Star Pilot Technology's Location Manager for multiple location database capabilities like Sun!


[ Go to Index ]

Sol! II comes with a full 30 (thirty) day "nag-free" trial use period. Use it and enjoy it and make sure it meets your needs before registering it. After the 30 day evaluation period, you should register the program or remove it. The program will gently remind you to register each time you use it after the evaluation period, but will remain fully functional.

See the Sol! II Information Page for registration details.

To install the registered Sol! II PRC file simply install it using the PalmPilot Install Tool and HotSync. Your currently defined preferences will be kept.


[ Go to Index ]

This program was developed using the following resources. Thanks to the authors of each of these resources, this product is possible.

  • PalmOS, a great developer's resource.
  • VFDIDE, a graphical development environment that works great with the GCC development tools for PalmPilot, by Ole Grossklaus.
  • GCC for PalmPilot for Win32 ported by John J. Lehett.
  • hosted by Darrin Massena.
  • Metrowerks Codewarrior, Version 6 and 9.
  • Pete M. Wilson of Starlight Computer Wizardry.
  • Chris DiPierro of Star Pilot Technologies.