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Crop Agriculture

Cosine of Solar Zenith (Embedded Excel) Calculator (Cloud-Based; MAY TAKE A FEW MOMENTS TO LOAD)

Landsat surface reflectance (SR) can be ordered for free from the USGS. The calculator below is for converting to SR independently (as explained in tutorials and courses) - please read: Background information about USGS & GIS Ag Maps surface reflectance.

Simply paste sun elevation from MTL file or manually enter elevation and cosine of the solar zenith will be calculated for atmospheric correction process.

MAY NEED TO PRESS ENTER AFTER INPUTTING SUN ELEVATION (if necessary, backspace so there is only one line after pasting before pressing enter)


The cosine of the solar zenith can also be calculated at the following website (solar zenith = [90 - solar elevation]):;