Latitude should be expressed in decimal degrees.
Longitude should be expressed in decimal degrees.Negative values indicate the longitudes in the Western hemisphere.

NOTE: If you do not know exactly the UV albedo at your point, you can use approximate UV albedo according to the type of surface and surroundings: ground (grass) - 2%; trees and snow - 40%; bare snow within 1 km - 70%
In range 0...90%
In range 150...490 DU
In range 0...0.99
Cloudiness:
In range 0...1

NOTE: UTC

This tool is under development and verification. If you have any questions or comments, please contact us.
The work was partially supported by RFBR grant № 12-05-00877.