AST                     Apparent Solar Time
Altitude                Solar Altitude Angle
Azimuth                 Solar Azimuth Angle
DayLength               Day Length
DayOfYear               Day of year
Declination             Declination Angle
DiffuseRadiation        Solar Diffuse Radiation on a Surface
DiffusionFactor         Atmospheric Diffusion Factor
DirectRadiation         Solar Direct Beam Radiation on Surface
EOT                     Equation of time
Extraterrestrial        Solar Extraterrestrial Radiation
ExtraterrestrialNormal
                        Normal Extraterrestrial Solar Radiation
HourAngle               Solar Hour Angle
Incidence               Solar Incidence Angle
LST                     Local Standard Time
OpenRadiation           Open Sky Solar Radiation
Solar                   Calculating Solar Variables
SolarConstant           Solar Constant
Sunrise                 Sunrise Time
Sunset                  Sunset Time
Transmittance           Atmospheric Transmittance
