Calculation of potential incoming solar radiation (insolation).
References:
- Boehner, J., Antonic, O. (2009): Land Surface Parameters Specific to Topo-Climatology. in Hengl, T. & Reuter, H.I. [Eds.]: Geomorphometry - Concepts, Software, Applications.
- Oke, T.R. (1988): Boundary Layer Climates. London, Taylor & Francis.
- Wilson, J.P., Gallant, J.C. [Eds.] (2000): Terrain Analysis - Principles and Applications. New York, John Wiley & Sons, Inc.
*) Most options should do well, but TAPES-G based diffuse irradiance calculation ('Atmospheric Effects' methods 2 and 3) needs further revision!
- Grid system
Grid system
- Grid system
- Elevation
Input Grid
-
- Sky View Factor
Input Grid
-
- Water Vapour Pressure [mbar]
Input Grid
-
- Latitude [degree]
Input Grid
-
- Longitude [degree]
Input Grid
-
- Direct Insolation
Output Grid
-
- Diffuse Insolation
Output Grid
-
- Total Insolation
Output Grid
- Total insolation, the sum of direct and diffuse incoming solar radiation.
- Direct to Diffuse Ratio
Output Grid
-
- Duration of Insolation
Output Grid
-
- Sunrise
Output Grid
- time of sunrise/sunset is only calculated if time span is set to single day
- Sunset
Output Grid
- time of sunrise/sunset is only calculated if time span is set to single day
- Solar Constant [W / m²]
Floating point
-
- Local Sky View Factor
Boolean
- Use sky view factor based on local slope (after Oke 1988), if no sky viev factor grid is given.
- Units
Choice
- Units for output radiation values.
Available choices: kWh / m², kJ / m², J / cm²
- Location
Node
-
- Latitude
Degree
-
Minimum: -90.0; Maximum: 90.0
- Planetary Bending
Parameters
-
- Time
Node
-
- Time Period
Choice
-
Available choices: moment, day, range of days
- Moment [h]
Floating point
-
Maximum: 24.0
- Time Span [h]
Value range
- Time span used for the calculation of daily radiation sums.
Minimum: 1.39579710889e-316; Maximum: 1.395734659e-316
- Time Resolution [h]: Day
Floating point
- Time step size for a day's calculation given in hours.
Maximum: 24.0
- Time Resolution [d]: Range of Days
Integer
- Time step size for a range of days calculation given in days.
Minimum: 1.0
- Update
Choice
- show direct insolation for each time step.
Available choices: do not update, update, colour stretch for each time step, update, fixed colour stretch
- Day of Year
Node
-
- Day of Month
Choice
-
Available choices: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
- Month
Choice
-
Available choices: January, February, March, April, May, June, July, August, September, October, November, December
- Day of Year (End of Range)
Node
-
- Day of Month
Choice
-
Available choices: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
- Month
Choice
-
Available choices: January, February, March, April, May, June, July, August, September, October, November, December
- Atmospheric Effects
Node
-
- Atmospheric Effects
Choice
-
Available choices: Height of Atmosphere and Vapour Pressure, Air Pressure, Water and Dust Content, Lumped Atmospheric Transmittance
- Height of Atmosphere and Vapour Pressure
Node
-
- Height of Atmosphere [m]
Floating point
-
- Water Vapour Pressure [mbar]
Floating point
- This value is used as constant if no vapour pressure grid is given.
- Air Pressure, Water and Dust Content
Node
-
- Atmospheric Pressure [mbar]
Floating point
-
- Water Content [cm]
Floating point
- Water content of a vertical slice of atmosphere in cm: 1.5 to 1.7, average=1.68
- Dust [ppm]
Floating point
- Dust factor: 100 ppm (standard)
- Lumped Atmospheric Transmittance
Node
-
- Lumped Atmospheric Transmittance [Percent]
Floating point
- The transmittance of the atmosphere, usually between 60 and 80 percent.
Maximum: 100.0