Tool Potential Incoming Solar Radiation

Calculation of potential incoming solar radiation (insolation). Times of sunrise/sunset will only be calculated if time span is set to single day.
Most options should do well, but TAPES-G based diffuse irradiance calculation ('Atmospheric Effects' methods 2 and 3) needs further revision!

References

• Böhner, J., Antonić, O. (2009): Land Surface Parameters Specific to Topo-Climatology. In: Hengl, T. & Reuter, H.I. [Eds.]: Geomorphometry - Concepts, Software, Applications.
• Hofierka, J., Šúri, M. (2002): The solar radiation model for Open source GIS: implementation and applications. International GRASS users conference in Trento, Italy, September 2002. ResearchGate.
• Oke, T.R. (1988): Boundary Layer Climates. London, Taylor & Francis.
• Wilson, J.P., Gallant, J.C. (2000): Secondary topographic attributes. In: Wilson, J.P., Gallant, J.C. [Eds.]: Terrain analysis: Principles and applications. New York, John Wiley & Sons, Inc., 87-131. ResearchGate.

• Author: O.Conrad (c) 2010
• Menu: Terrain Analysis|Lighting

Parameters

Command-line

Usage: saga_cmd ta_lighting 2 [-GRD_DEM <str>] [-GRD_SVF <str>] [-GRD_VAPOUR <str>] [-GRD_VAPOUR_DEFAULT <double>] [-GRD_LINKE <str>] [-GRD_LINKE_DEFAULT <double>] [-GRD_DIRECT <str>] [-GRD_DIFFUS <str>] [-GRD_TOTAL <str>] [-GRD_RATIO <str>] [-GRD_FLAT <str>] [-GRD_DURATION <str>] [-GRD_SUNRISE <str>] [-GRD_SUNSET <str>] [-SOLARCONST <double>] [-LOCALSVF <str>] [-UNITS <str>] [-SHADOW <str>] [-LOCATION <str>] [-LATITUDE <double>] [-PERIOD <str>] [-DAY <date>] [-DAY_STOP <date>] [-DAYS_STEP <num>] [-MOMENT <double>] [-HOUR_RANGE_MIN <double>] [-HOUR_RANGE_MAX <double>] [-HOUR_STEP <double>] [-METHOD <str>] [-ATMOSPHERE <double>] [-PRESSURE <double>] [-WATER <double>] [-DUST <double>] [-LUMPED <double>]
  -GRD_DEM:<str>              	Elevation
	Grid, input
  -GRD_SVF:<str>              	Sky View Factor
	Grid, input, optional
  -GRD_VAPOUR:<str>           	Water Vapour Pressure [mbar]
	Grid, input, optional
  -GRD_VAPOUR_DEFAULT:<double>	Default
	Floating point
	Minimum: 0.000000
	Default: 10.000000
  -GRD_LINKE:<str>            	Linke Turbidity Coefficient
	Grid, input, optional
  -GRD_LINKE_DEFAULT:<double> 	Default
	Floating point
	Minimum: 0.000000
	Default: 3.000000
  -GRD_DIRECT:<str>           	Direct Insolation
	Grid, output
  -GRD_DIFFUS:<str>           	Diffuse Insolation
	Grid, output
  -GRD_TOTAL:<str>            	Total Insolation
	Grid, output, optional
  -GRD_RATIO:<str>            	Direct to Diffuse Ratio
	Grid, output, optional
  -GRD_FLAT:<str>             	Compare to Flat Terrain
	Grid, output, optional
  -GRD_DURATION:<str>         	Duration of Insolation
	Grid, output, optional
  -GRD_SUNRISE:<str>          	Sunrise
	Grid, output, optional
  -GRD_SUNSET:<str>           	Sunset
	Grid, output, optional
  -SOLARCONST:<double>        	Solar Constant [W/m_]
	Floating point
	Minimum: 0.000000
	Default: 1367.000000
  -LOCALSVF:<str>             	Local Sky View Factor
	Boolean
	Default: 1
  -UNITS:<str>                	Units
	Choice
	Available Choices:
	[0] [kWh/m_]
	[1] [kJ/m_]
	[2] [J/cm_]
	Default: 0
  -SHADOW:<str>               	Shadow
	Choice
	Available Choices:
	[0] slim
	[1] fat
	[2] none
	Default: 0
  -LOCATION:<str>             	Location
	Choice
	Available Choices:
	[0] constant latitude
	[1] calculate from grid system
	Default: 0
  -LATITUDE:<double>          	Latitude
	Degree
	Minimum: -90.000000
	Maximum: 90.000000
	Default: 53.000000
  -PERIOD:<str>               	Time Period
	Choice
	Available Choices:
	[0] moment
	[1] day
	[2] range of days
	Default: 1
  -DAY:<date>                 	Day
	Date
	Default: 2023-07-16
  -DAY_STOP:<date>            	Last Day
	Date
	Default: 2023-07-16
  -DAYS_STEP:<num>            	Resolution [d]
	Integer
	Minimum: 1
	Default: 5
  -MOMENT:<double>            	Moment [h]
	Floating point
	Minimum: 0.000000
	Maximum: 24.000000
	Default: 12.000000
  -HOUR_RANGE_MIN:<double>    	Time Span [h]
	Value range
  -HOUR_RANGE_MAX:<double>    	Time Span [h]
	Value range
  -HOUR_STEP:<double>         	Resolution [h]
	Floating point
	Minimum: 0.000000
	Maximum: 24.000000
	Default: 0.500000
  -METHOD:<str>               	Atmospheric Effects
	Choice
	Available Choices:
	[0] Height of Atmosphere and Vapour Pressure
	[1] Air Pressure, Water and Dust Content
	[2] Lumped Atmospheric Transmittance
	[3] Hofierka and __ri
	Default: 2
  -ATMOSPHERE:<double>        	Height of Atmosphere [m]
	Floating point
	Minimum: 0.000000
	Default: 12000.000000
  -PRESSURE:<double>          	Barometric Pressure [mbar]
	Floating point
	Minimum: 0.000000
	Default: 1013.000000
  -WATER:<double>             	Water Content [cm]
	Floating point
	Minimum: 0.000000
	Default: 1.680000
  -DUST:<double>              	Dust [ppm]
	Floating point
	Minimum: 0.000000
	Default: 100.000000
  -LUMPED:<double>            	Lumped Atmospheric Transmittance [Percent]
	Floating point
	Minimum: 0.000000
	Maximum: 100.000000
	Default: 70.000000