sustainable by design

SunAngle

This tool calculates solar angle data based on date, time, and location. Please read the important instructions, notes, and FAQ pages before using this tool. Click on any input or output name for additional details.

INPUTS
longitude		time
latitude		time zone
date		time basis
year		daylight savings
elevation		zero azimuth



OUTPUTS
altitude angle		declination
azimuth angle		equation of time
clock time		time of sunrise
solar time		time of sunset
hour angle

The development and maintenance of SunAngle is supported 100% by voluntary user donations. If you found this program helpful, please consider making a small donation...this can be done quickly and securely by credit card, or you can mail a check. Suggested donations are $25 for commercial use, and $10 for personal use. Please visit the Shareware page for details, or you can make a quick PayPal or credit card donation to the right. Thanks!

QUICK DONATION

The author maintains a private mailing list of users of SunAngle and his other shareware solar design tools, and is happy to send you very occasional notices about software upgrades and other items of interest. Such notices do not occur more frequently than a few times a year.

If you're interested in joining the SunAngle mailing list, please send e-mail to the author with this request. Your e-mail address will never be used for commercial purposes or given to anyone else for any reason.