Download

You may download the The Sun API (pure freeware) and use it without time limitation.

CLICK HERE TO DOWNLOAD The Sun API Freeware (502K)

The freeware version includes:

• Full functionality
• Full documentation
• Header files for Visual Basic, DeltaCAD, Excel and PowerBasic
• Full uninstall support
• No time limits
• Limited accuracy

The freeware version is fulling functional, with very high accuracy:

• The Equation of Time is +/- 270 milliseconds
• The Solar Declination is +/- 30 arcseconds
• The Solar Hour Angle is +/- 4 arcminutes