SunPosition

This tool calculates an array of solar angle data that can be copied into spreadsheets and other documents. Please read the important instructions, notes, and FAQ pages before using this tool. Click on any input label for additional details.

INPUTS
TIME BASIS
solar time     clock time     [what's the difference?]
DATA TO CALCULATE
altitude azimuth declination    
eq. of time hour angle day length
LOCATION
latitude  degrees  North  South
longitude
time zone
zero azimuth
DATA RESOLUTION
frequency start date
resolution time
OUTPUT FORMAT
delimiter date style
angle units time style
leap year include header
OUTPUT

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The development and maintenance of SunPosition is supported by user donations. If you found this tool helpful, please consider making a small donation...this can be done quickly and securely by credit card or PayPal account, using the buttons to the right. Your donations will contribute to improvements to this and other solar design tools. Thank you!

Mailing List

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