Solar Calculator Links

Please note: inclusion in this list does not imply any endorsement by NOAA or the Department of Commerce. Links are provided with no guarantee of data quality or accuracy. When you click on any of the links below, you will be leaving the NOAA site. You may wish to review the privacy notices on these external sites, as their information collection practices may differ from NOAA's. If you have any trouble with information obtained from any of these links, please contact their respective webmasters.

Calculations:

• Low Accuracy Equations in PDF format
• National Renewable Energy Laboratory Solar Position Calculators
• U.S. Naval Observatory online calculators for solar and lunar position

Daylight Saving Time:

• Daylight Saving Time on WebExhibits more information
• TimeTemperature.com U.S. Time Zone Map

Education:

• Basics of Space Flight from NASA'a Jet Propulsion Lab
• Solar Learning Activities from NASA and Montana State University

Latitude and Longitude:

• ZipInfo.com find U.S. lat/long from zip code
• PlacesNamed.com Geographic Encyclopedia for U.S.

Time and Timekeeping:

• The Official U.S. Time from the National Institute of Standards and Technology

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Solar Calculation Resources: