For surface energy models and estimation of solar positions and components with varying topography, time and locations. The functions calculate solar topofatmosphere, open, diffuse and direct components, atmospheric transmittance and diffuse factors, day length, sunrise and sunset, solar azimuth, zenith, altitude, incidence, and hour angles, earth declination angle, equation of time, and solar constant. Details about the methods and equations are explained in Seyednasrollah, Bijan, Mukesh Kumar, and Timothy E. Link. 'On the role of vegetation density on net snow cover radiation at the forest floor.' Journal of Geophysical Research: Atmospheres 118.15 (2013): 83598374, <doi:10.1002/jgrd.50575>.
Package details 


Author  Bijan Seyednasrollah 
Maintainer  Bijan Seyednasrollah <bijan.s.nasr@gmail.com> 
License  AGPL3  file LICENSE 
Version  1.0.0 
URL  https://github.com/bnasr/solrad/ 
Package repository  View on GitHub 
Installation 
Install the latest version of this package by entering the following in R:

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