Description Usage Arguments Author(s) References
Adjusts solar radiation for land slope and aspect relative to the sun, 0=level ground
1  | slopefactor(lat, Jday, slope, aspect)
 | 
lat | 
 latitdue [rad]  | 
Jday | 
 Julian date or day of the year [day]  | 
slope | 
 slope of the ground [rad]  | 
aspect | 
 ground aspect [rad from north]  | 
M. Todd Walter, J. Archibald
Monteith and Unsworth (1990) Principles of Environmental Physics, 2nd ed. Chapter 5
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